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         # Make gitweb use an alternative format of the URLs which can be
 310         # more readable and natural-looking: project name is embedded
 311         # directly in the path and the query string contains other
 312         # auxiliary information. All gitweb installations recognize
 313         # URL in either format; this configures in which formats gitweb
 314         # generates links.
 315
 316         # To enable system wide have in $GITWEB_CONFIG
 317         # $feature{'pathinfo'}{'default'} = [1];
 318         # Project specific override is not supported.
 319
 320         # Note that you will need to change the default location of CSS,
 321         # favicon, logo and possibly other files to an absolute URL. Also,
 322         # if gitweb.cgi serves as your indexfile, you will need to force
 323         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 324         'pathinfo' => {
 325                 'override' => 0,
 326                 'default' => [0]},
 327
 328         # Make gitweb consider projects in project root subdirectories
 329         # to be forks of existing projects. Given project $projname.git,
 330         # projects matching $projname/*.git will not be shown in the main
 331         # projects list, instead a '+' mark will be added to $projname
 332         # there and a 'forks' view will be enabled for the project, listing
 333         # all the forks. If project list is taken from a file, forks have
 334         # to be listed after the main project.
 335
 336         # To enable system wide have in $GITWEB_CONFIG
 337         # $feature{'forks'}{'default'} = [1];
 338         # Project specific override is not supported.
 339         'forks' => {
 340                 'override' => 0,
 341                 'default' => [0]},
 342
 343         # Insert custom links to the action bar of all project pages.
 344         # This enables you mainly to link to third-party scripts integrating
 345         # into gitweb; e.g. git-browser for graphical history representation
 346         # or custom web-based repository administration interface.
 347
 348         # The 'default' value consists of a list of triplets in the form
 349         # (label, link, position) where position is the label after which
 350         # to insert the link and link is a format string where %n expands
 351         # to the project name, %f to the project path within the filesystem,
 352         # %h to the current hash (h gitweb parameter) and %b to the current
 353         # hash base (hb gitweb parameter); %% expands to %.
 354
 355         # To enable system wide have in $GITWEB_CONFIG e.g.
 356         # $feature{'actions'}{'default'} = [('graphiclog',
 357         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 358         # Project specific override is not supported.
 359         'actions' => {
 360                 'override' => 0,
 361                 'default' => []},
 362
 363         # Allow gitweb scan project content tags described in ctags/
 364         # of project repository, and display the popular Web 2.0-ish
 365         # "tag cloud" near the project list. Note that this is something
 366         # COMPLETELY different from the normal Git tags.
 367
 368         # gitweb by itself can show existing tags, but it does not handle
 369         # tagging itself; you need an external application for that.
 370         # For an example script, check Girocco's cgi/tagproj.cgi.
 371         # You may want to install the HTML::TagCloud Perl module to get
 372         # a pretty tag cloud instead of just a list of tags.
 373
 374         # To enable system wide have in $GITWEB_CONFIG
 375         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 376         # Project specific override is not supported.
 377         'ctags' => {
 378                 'override' => 0,
 379                 'default' => [0]},
 380
 381         # The maximum number of patches in a patchset generated in patch
 382         # view. Set this to 0 or undef to disable patch view, or to a
 383         # negative number to remove any limit.
 384
 385         # To disable system wide have in $GITWEB_CONFIG
 386         # $feature{'patches'}{'default'} = [0];
 387         # To have project specific config enable override in $GITWEB_CONFIG
 388         # $feature{'patches'}{'override'} = 1;
 389         # and in project config gitweb.patches = 0|n;
 390         # where n is the maximum number of patches allowed in a patchset.
 391         'patches' => {
 392                 'sub' => \&feature_patches,
 393                 'override' => 0,
 394                 'default' => [16]},
 395
 396         # Avatar support. When this feature is enabled, views such as
 397         # shortlog or commit will display an avatar associated with
 398         # the email of the committer(s) and/or author(s).
 399
 400         # Currently available providers are gravatar and picon.
 401         # If an unknown provider is specified, the feature is disabled.
 402
 403         # Gravatar depends on Digest::MD5.
 404         # Picon currently relies on the indiana.edu database.
 405
 406         # To enable system wide have in $GITWEB_CONFIG
 407         # $feature{'avatar'}{'default'} = ['<provider>'];
 408         # where <provider> is either gravatar or picon.
 409         # To have project specific config enable override in $GITWEB_CONFIG
 410         # $feature{'avatar'}{'override'} = 1;
 411         # and in project config gitweb.avatar = <provider>;
 412         'avatar' => {
 413                 'sub' => \&feature_avatar,
 414                 'override' => 0,
 415                 'default' => ['']},
 416
 417         # Enable displaying how much time and how many git commands
 418         # it took to generate and display page.  Disabled by default.
 419         # Project specific override is not supported.
 420         'timed' => {
 421                 'override' => 0,
 422                 'default' => [0]},
 423 );
 424
 425 sub gitweb_get_feature {
 426         my ($name) = @_;
 427         return unless exists $feature{$name};
 428         my ($sub, $override, @defaults) = (
 429                 $feature{$name}{'sub'},
 430                 $feature{$name}{'override'},
 431                 @{$feature{$name}{'default'}});
 432         if (!$override) { return @defaults; }
 433         if (!defined $sub) {
 434                 warn "feature $name is not overridable";
 435                 return @defaults;
 436         }
 437         return $sub->(@defaults);
 438 }
 439
 440 # A wrapper to check if a given feature is enabled.
 441 # With this, you can say
 442 #
 443 #   my $bool_feat = gitweb_check_feature('bool_feat');
 444 #   gitweb_check_feature('bool_feat') or somecode;
 445 #
 446 # instead of
 447 #
 448 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 449 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 450 #
 451 sub gitweb_check_feature {
 452         return (gitweb_get_feature(@_))[0];
 453 }
 454
 455
 456 sub feature_bool {
 457         my $key = shift;
 458         my ($val) = git_get_project_config($key, '--bool');
 459
 460         if (!defined $val) {
 461                 return ($_[0]);
 462         } elsif ($val eq 'true') {
 463                 return (1);
 464         } elsif ($val eq 'false') {
 465                 return (0);
 466         }
 467 }
 468
 469 sub feature_snapshot {
 470         my (@fmts) = @_;
 471
 472         my ($val) = git_get_project_config('snapshot');
 473
 474         if ($val) {
 475                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 476         }
 477
 478         return @fmts;
 479 }
 480
 481 sub feature_patches {
 482         my @val = (git_get_project_config('patches', '--int'));
 483
 484         if (@val) {
 485                 return @val;
 486         }
 487
 488         return ($_[0]);
 489 }
 490
 491 sub feature_avatar {
 492         my @val = (git_get_project_config('avatar'));
 493
 494         return @val ? @val : @_;
 495 }
 496
 497 # checking HEAD file with -e is fragile if the repository was
 498 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 499 # and then pruned.
 500 sub check_head_link {
 501         my ($dir) = @_;
 502         my $headfile = "$dir/HEAD";
 503         return ((-e $headfile) ||
 504                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 505 }
 506
 507 sub check_export_ok {
 508         my ($dir) = @_;
 509         return (check_head_link($dir) &&
 510                 (!$export_ok || -e "$dir/$export_ok") &&
 511                 (!$export_auth_hook || $export_auth_hook->($dir)));
 512 }
 513
 514 # process alternate names for backward compatibility
 515 # filter out unsupported (unknown) snapshot formats
 516 sub filter_snapshot_fmts {
 517         my @fmts = @_;
 518
 519         @fmts = map {
 520                 exists $known_snapshot_format_aliases{$_} ?
 521                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 522         @fmts = grep {
 523                 exists $known_snapshot_formats{$_} &&
 524                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 525 }
 526
 527 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 528 if (-e $GITWEB_CONFIG) {
 529         do $GITWEB_CONFIG;
 530 } else {
 531         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 532         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 533 }
 534
 535 # version of the core git binary
 536 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 537 $number_of_git_cmds++;
 538
 539 $projects_list ||= $projectroot;
 540
 541 # ======================================================================
 542 # input validation and dispatch
 543
 544 # input parameters can be collected from a variety of sources (presently, CGI
 545 # and PATH_INFO), so we define an %input_params hash that collects them all
 546 # together during validation: this allows subsequent uses (e.g. href()) to be
 547 # agnostic of the parameter origin
 548
 549 our %input_params = ();
 550
 551 # input parameters are stored with the long parameter name as key. This will
 552 # also be used in the href subroutine to convert parameters to their CGI
 553 # equivalent, and since the href() usage is the most frequent one, we store
 554 # the name -> CGI key mapping here, instead of the reverse.
 555 #
 556 # XXX: Warning: If you touch this, check the search form for updating,
 557 # too.
 558
 559 our @cgi_param_mapping = (
 560         project => "p",
 561         action => "a",
 562         file_name => "f",
 563         file_parent => "fp",
 564         hash => "h",
 565         hash_parent => "hp",
 566         hash_base => "hb",
 567         hash_parent_base => "hpb",
 568         page => "pg",
 569         order => "o",
 570         searchtext => "s",
 571         searchtype => "st",
 572         snapshot_format => "sf",
 573         extra_options => "opt",
 574         search_use_regexp => "sr",
 575         # this must be last entry (for manipulation from JavaScript)
 576         javascript => "js"
 577 );
 578 our %cgi_param_mapping = @cgi_param_mapping;
 579
 580 # we will also need to know the possible actions, for validation
 581 our %actions = (
 582         "blame" => \&git_blame,
 583         "blame_incremental" => \&git_blame_incremental,
 584         "blame_data" => \&git_blame_data,
 585         "blobdiff" => \&git_blobdiff,
 586         "blobdiff_plain" => \&git_blobdiff_plain,
 587         "blob" => \&git_blob,
 588         "blob_plain" => \&git_blob_plain,
 589         "commitdiff" => \&git_commitdiff,
 590         "commitdiff_plain" => \&git_commitdiff_plain,
 591         "commit" => \&git_commit,
 592         "forks" => \&git_forks,
 593         "heads" => \&git_heads,
 594         "history" => \&git_history,
 595         "log" => \&git_log,
 596         "patch" => \&git_patch,
 597         "patches" => \&git_patches,
 598         "rss" => \&git_rss,
 599         "atom" => \&git_atom,
 600         "search" => \&git_search,
 601         "search_help" => \&git_search_help,
 602         "shortlog" => \&git_shortlog,
 603         "summary" => \&git_summary,
 604         "tag" => \&git_tag,
 605         "tags" => \&git_tags,
 606         "tree" => \&git_tree,
 607         "snapshot" => \&git_snapshot,
 608         "object" => \&git_object,
 609         # those below don't need $project
 610         "opml" => \&git_opml,
 611         "project_list" => \&git_project_list,
 612         "project_index" => \&git_project_index,
 613 );
 614
 615 # finally, we have the hash of allowed extra_options for the commands that
 616 # allow them
 617 our %allowed_options = (
 618         "--no-merges" => [ qw(rss atom log shortlog history) ],
 619 );
 620
 621 # fill %input_params with the CGI parameters. All values except for 'opt'
 622 # should be single values, but opt can be an array. We should probably
 623 # build an array of parameters that can be multi-valued, but since for the time
 624 # being it's only this one, we just single it out
 625 while (my ($name, $symbol) = each %cgi_param_mapping) {
 626         if ($symbol eq 'opt') {
 627                 $input_params{$name} = [ $cgi->param($symbol) ];
 628         } else {
 629                 $input_params{$name} = $cgi->param($symbol);
 630         }
 631 }
 632
 633 # now read PATH_INFO and update the parameter list for missing parameters
 634 sub evaluate_path_info {
 635         return if defined $input_params{'project'};
 636         return if !$path_info;
 637         $path_info =~ s,^/+,,;
 638         return if !$path_info;
 639
 640         # find which part of PATH_INFO is project
 641         my $project = $path_info;
 642         $project =~ s,/+$,,;
 643         while ($project && !check_head_link("$projectroot/$project")) {
 644                 $project =~ s,/*[^/]*$,,;
 645         }
 646         return unless $project;
 647         $input_params{'project'} = $project;
 648
 649         # do not change any parameters if an action is given using the query string
 650         return if $input_params{'action'};
 651         $path_info =~ s,^\Q$project\E/*,,;
 652
 653         # next, check if we have an action
 654         my $action = $path_info;
 655         $action =~ s,/.*$,,;
 656         if (exists $actions{$action}) {
 657                 $path_info =~ s,^$action/*,,;
 658                 $input_params{'action'} = $action;
 659         }
 660
 661         # list of actions that want hash_base instead of hash, but can have no
 662         # pathname (f) parameter
 663         my @wants_base = (
 664                 'tree',
 665                 'history',
 666         );
 667
 668         # we want to catch
 669         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 670         my ($parentrefname, $parentpathname, $refname, $pathname) =
 671                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 672
 673         # first, analyze the 'current' part
 674         if (defined $pathname) {
 675                 # we got "branch:filename" or "branch:dir/"
 676                 # we could use git_get_type(branch:pathname), but:
 677                 # - it needs $git_dir
 678                 # - it does a git() call
 679                 # - the convention of terminating directories with a slash
 680                 #   makes it superfluous
 681                 # - embedding the action in the PATH_INFO would make it even
 682                 #   more superfluous
 683                 $pathname =~ s,^/+,,;
 684                 if (!$pathname || substr($pathname, -1) eq "/") {
 685                         $input_params{'action'} ||= "tree";
 686                         $pathname =~ s,/$,,;
 687                 } else {
 688                         # the default action depends on whether we had parent info
 689                         # or not
 690                         if ($parentrefname) {
 691                                 $input_params{'action'} ||= "blobdiff_plain";
 692                         } else {
 693                                 $input_params{'action'} ||= "blob_plain";
 694                         }
 695                 }
 696                 $input_params{'hash_base'} ||= $refname;
 697                 $input_params{'file_name'} ||= $pathname;
 698         } elsif (defined $refname) {
 699                 # we got "branch". In this case we have to choose if we have to
 700                 # set hash or hash_base.
 701                 #
 702                 # Most of the actions without a pathname only want hash to be
 703                 # set, except for the ones specified in @wants_base that want
 704                 # hash_base instead. It should also be noted that hand-crafted
 705                 # links having 'history' as an action and no pathname or hash
 706                 # set will fail, but that happens regardless of PATH_INFO.
 707                 $input_params{'action'} ||= "shortlog";
 708                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 709                         $input_params{'hash_base'} ||= $refname;
 710                 } else {
 711                         $input_params{'hash'} ||= $refname;
 712                 }
 713         }
 714
 715         # next, handle the 'parent' part, if present
 716         if (defined $parentrefname) {
 717                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 718                 # someproject/blobdiff/oldrev..newrev:/filename
 719                 if ($parentpathname) {
 720                         $parentpathname =~ s,^/+,,;
 721                         $parentpathname =~ s,/$,,;
 722                         $input_params{'file_parent'} ||= $parentpathname;
 723                 } else {
 724                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 725                 }
 726                 # we assume that hash_parent_base is wanted if a path was specified,
 727                 # or if the action wants hash_base instead of hash
 728                 if (defined $input_params{'file_parent'} ||
 729                         grep { $_ eq $input_params{'action'} } @wants_base) {
 730                         $input_params{'hash_parent_base'} ||= $parentrefname;
 731                 } else {
 732                         $input_params{'hash_parent'} ||= $parentrefname;
 733                 }
 734         }
 735
 736         # for the snapshot action, we allow URLs in the form
 737         # $project/snapshot/$hash.ext
 738         # where .ext determines the snapshot and gets removed from the
 739         # passed $refname to provide the $hash.
 740         #
 741         # To be able to tell that $refname includes the format extension, we
 742         # require the following two conditions to be satisfied:
 743         # - the hash input parameter MUST have been set from the $refname part
 744         #   of the URL (i.e. they must be equal)
 745         # - the snapshot format MUST NOT have been defined already (e.g. from
 746         #   CGI parameter sf)
 747         # It's also useless to try any matching unless $refname has a dot,
 748         # so we check for that too
 749         if (defined $input_params{'action'} &&
 750                 $input_params{'action'} eq 'snapshot' &&
 751                 defined $refname && index($refname, '.') != -1 &&
 752                 $refname eq $input_params{'hash'} &&
 753                 !defined $input_params{'snapshot_format'}) {
 754                 # We loop over the known snapshot formats, checking for
 755                 # extensions. Allowed extensions are both the defined suffix
 756                 # (which includes the initial dot already) and the snapshot
 757                 # format key itself, with a prepended dot
 758                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 759                         my $hash = $refname;
 760                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 761                                 next;
 762                         }
 763                         my $sfx = $1;
 764                         # a valid suffix was found, so set the snapshot format
 765                         # and reset the hash parameter
 766                         $input_params{'snapshot_format'} = $fmt;
 767                         $input_params{'hash'} = $hash;
 768                         # we also set the format suffix to the one requested
 769                         # in the URL: this way a request for e.g. .tgz returns
 770                         # a .tgz instead of a .tar.gz
 771                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 772                         last;
 773                 }
 774         }
 775 }
 776 evaluate_path_info();
 777
 778 our $action = $input_params{'action'};
 779 if (defined $action) {
 780         if (!validate_action($action)) {
 781                 die_error(400, "Invalid action parameter");
 782         }
 783 }
 784
 785 # parameters which are pathnames
 786 our $project = $input_params{'project'};
 787 if (defined $project) {
 788         if (!validate_project($project)) {
 789                 undef $project;
 790                 die_error(404, "No such project");
 791         }
 792 }
 793
 794 our $file_name = $input_params{'file_name'};
 795 if (defined $file_name) {
 796         if (!validate_pathname($file_name)) {
 797                 die_error(400, "Invalid file parameter");
 798         }
 799 }
 800
 801 our $file_parent = $input_params{'file_parent'};
 802 if (defined $file_parent) {
 803         if (!validate_pathname($file_parent)) {
 804                 die_error(400, "Invalid file parent parameter");
 805         }
 806 }
 807
 808 # parameters which are refnames
 809 our $hash = $input_params{'hash'};
 810 if (defined $hash) {
 811         if (!validate_refname($hash)) {
 812                 die_error(400, "Invalid hash parameter");
 813         }
 814 }
 815
 816 our $hash_parent = $input_params{'hash_parent'};
 817 if (defined $hash_parent) {
 818         if (!validate_refname($hash_parent)) {
 819                 die_error(400, "Invalid hash parent parameter");
 820         }
 821 }
 822
 823 our $hash_base = $input_params{'hash_base'};
 824 if (defined $hash_base) {
 825         if (!validate_refname($hash_base)) {
 826                 die_error(400, "Invalid hash base parameter");
 827         }
 828 }
 829
 830 our @extra_options = @{$input_params{'extra_options'}};
 831 # @extra_options is always defined, since it can only be (currently) set from
 832 # CGI, and $cgi->param() returns the empty array in array context if the param
 833 # is not set
 834 foreach my $opt (@extra_options) {
 835         if (not exists $allowed_options{$opt}) {
 836                 die_error(400, "Invalid option parameter");
 837         }
 838         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 839                 die_error(400, "Invalid option parameter for this action");
 840         }
 841 }
 842
 843 our $hash_parent_base = $input_params{'hash_parent_base'};
 844 if (defined $hash_parent_base) {
 845         if (!validate_refname($hash_parent_base)) {
 846                 die_error(400, "Invalid hash parent base parameter");
 847         }
 848 }
 849
 850 # other parameters
 851 our $page = $input_params{'page'};
 852 if (defined $page) {
 853         if ($page =~ m/[^0-9]/) {
 854                 die_error(400, "Invalid page parameter");
 855         }
 856 }
 857
 858 our $searchtype = $input_params{'searchtype'};
 859 if (defined $searchtype) {
 860         if ($searchtype =~ m/[^a-z]/) {
 861                 die_error(400, "Invalid searchtype parameter");
 862         }
 863 }
 864
 865 our $search_use_regexp = $input_params{'search_use_regexp'};
 866
 867 our $searchtext = $input_params{'searchtext'};
 868 our $search_regexp;
 869 if (defined $searchtext) {
 870         if (length($searchtext) < 2) {
 871                 die_error(403, "At least two characters are required for search parameter");
 872         }
 873         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 874 }
 875
 876 # path to the current git repository
 877 our $git_dir;
 878 $git_dir = "$projectroot/$project" if $project;
 879
 880 # list of supported snapshot formats
 881 our @snapshot_fmts = gitweb_get_feature('snapshot');
 882 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 883
 884 # check that the avatar feature is set to a known provider name,
 885 # and for each provider check if the dependencies are satisfied.
 886 # if the provider name is invalid or the dependencies are not met,
 887 # reset $git_avatar to the empty string.
 888 our ($git_avatar) = gitweb_get_feature('avatar');
 889 if ($git_avatar eq 'gravatar') {
 890         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 891 } elsif ($git_avatar eq 'picon') {
 892         # no dependencies
 893 } else {
 894         $git_avatar = '';
 895 }
 896
 897 # dispatch
 898 if (!defined $action) {
 899         if (defined $hash) {
 900                 $action = git_get_type($hash);
 901         } elsif (defined $hash_base && defined $file_name) {
 902                 $action = git_get_type("$hash_base:$file_name");
 903         } elsif (defined $project) {
 904                 $action = 'summary';
 905         } else {
 906                 $action = 'project_list';
 907         }
 908 }
 909 if (!defined($actions{$action})) {
 910         die_error(400, "Unknown action");
 911 }
 912 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 913     !$project) {
 914         die_error(400, "Project needed");
 915 }
 916 $actions{$action}->();
 917 exit;
 918
 919 ## ======================================================================
 920 ## action links
 921
 922 sub href {
 923         my %params = @_;
 924         # default is to use -absolute url() i.e. $my_uri
 925         my $href = $params{-full} ? $my_url : $my_uri;
 926
 927         $params{'project'} = $project unless exists $params{'project'};
 928
 929         if ($params{-replay}) {
 930                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 931                         if (!exists $params{$name}) {
 932                                 $params{$name} = $input_params{$name};
 933                         }
 934                 }
 935         }
 936
 937         my $use_pathinfo = gitweb_check_feature('pathinfo');
 938         if ($use_pathinfo and defined $params{'project'}) {
 939                 # try to put as many parameters as possible in PATH_INFO:
 940                 #   - project name
 941                 #   - action
 942                 #   - hash_parent or hash_parent_base:/file_parent
 943                 #   - hash or hash_base:/filename
 944                 #   - the snapshot_format as an appropriate suffix
 945
 946                 # When the script is the root DirectoryIndex for the domain,
 947                 # $href here would be something like http://gitweb.example.com/
 948                 # Thus, we strip any trailing / from $href, to spare us double
 949                 # slashes in the final URL
 950                 $href =~ s,/$,,;
 951
 952                 # Then add the project name, if present
 953                 $href .= "/".esc_url($params{'project'});
 954                 delete $params{'project'};
 955
 956                 # since we destructively absorb parameters, we keep this
 957                 # boolean that remembers if we're handling a snapshot
 958                 my $is_snapshot = $params{'action'} eq 'snapshot';
 959
 960                 # Summary just uses the project path URL, any other action is
 961                 # added to the URL
 962                 if (defined $params{'action'}) {
 963                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 964                         delete $params{'action'};
 965                 }
 966
 967                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 968                 # stripping nonexistent or useless pieces
 969                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 970                         || $params{'hash_parent'} || $params{'hash'});
 971                 if (defined $params{'hash_base'}) {
 972                         if (defined $params{'hash_parent_base'}) {
 973                                 $href .= esc_url($params{'hash_parent_base'});
 974                                 # skip the file_parent if it's the same as the file_name
 975                                 if (defined $params{'file_parent'}) {
 976                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 977                                                 delete $params{'file_parent'};
 978                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 979                                                 $href .= ":/".esc_url($params{'file_parent'});
 980                                                 delete $params{'file_parent'};
 981                                         }
 982                                 }
 983                                 $href .= "..";
 984                                 delete $params{'hash_parent'};
 985                                 delete $params{'hash_parent_base'};
 986                         } elsif (defined $params{'hash_parent'}) {
 987                                 $href .= esc_url($params{'hash_parent'}). "..";
 988                                 delete $params{'hash_parent'};
 989                         }
 990
 991                         $href .= esc_url($params{'hash_base'});
 992                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 993                                 $href .= ":/".esc_url($params{'file_name'});
 994                                 delete $params{'file_name'};
 995                         }
 996                         delete $params{'hash'};
 997                         delete $params{'hash_base'};
 998                 } elsif (defined $params{'hash'}) {
 999                         $href .= esc_url($params{'hash'});
1000                         delete $params{'hash'};
1001                 }
1002
1003                 # If the action was a snapshot, we can absorb the
1004                 # snapshot_format parameter too
1005                 if ($is_snapshot) {
1006                         my $fmt = $params{'snapshot_format'};
1007                         # snapshot_format should always be defined when href()
1008                         # is called, but just in case some code forgets, we
1009                         # fall back to the default
1010                         $fmt ||= $snapshot_fmts[0];
1011                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1012                         delete $params{'snapshot_format'};
1013                 }
1014         }
1015
1016         # now encode the parameters explicitly
1017         my @result = ();
1018         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1019                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1020                 if (defined $params{$name}) {
1021                         if (ref($params{$name}) eq "ARRAY") {
1022                                 foreach my $par (@{$params{$name}}) {
1023                                         push @result, $symbol . "=" . esc_param($par);
1024                                 }
1025                         } else {
1026                                 push @result, $symbol . "=" . esc_param($params{$name});
1027                         }
1028                 }
1029         }
1030         $href .= "?" . join(';', @result) if scalar @result;
1031
1032         return $href;
1033 }
1034
1035
1036 ## ======================================================================
1037 ## validation, quoting/unquoting and escaping
1038
1039 sub validate_action {
1040         my $input = shift || return undef;
1041         return undef unless exists $actions{$input};
1042         return $input;
1043 }
1044
1045 sub validate_project {
1046         my $input = shift || return undef;
1047         if (!validate_pathname($input) ||
1048                 !(-d "$projectroot/$input") ||
1049                 !check_export_ok("$projectroot/$input") ||
1050                 ($strict_export && !project_in_list($input))) {
1051                 return undef;
1052         } else {
1053                 return $input;
1054         }
1055 }
1056
1057 sub validate_pathname {
1058         my $input = shift || return undef;
1059
1060         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1061         # at the beginning, at the end, and between slashes.
1062         # also this catches doubled slashes
1063         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1064                 return undef;
1065         }
1066         # no null characters
1067         if ($input =~ m!\0!) {
1068                 return undef;
1069         }
1070         return $input;
1071 }
1072
1073 sub validate_refname {
1074         my $input = shift || return undef;
1075
1076         # textual hashes are O.K.
1077         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1078                 return $input;
1079         }
1080         # it must be correct pathname
1081         $input = validate_pathname($input)
1082                 or return undef;
1083         # restrictions on ref name according to git-check-ref-format
1084         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1085                 return undef;
1086         }
1087         return $input;
1088 }
1089
1090 # decode sequences of octets in utf8 into Perl's internal form,
1091 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1092 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1093 sub to_utf8 {
1094         my $str = shift;
1095         if (utf8::valid($str)) {
1096                 utf8::decode($str);
1097                 return $str;
1098         } else {
1099                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1100         }
1101 }
1102
1103 # quote unsafe chars, but keep the slash, even when it's not
1104 # correct, but quoted slashes look too horrible in bookmarks
1105 sub esc_param {
1106         my $str = shift;
1107         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1108         $str =~ s/\+/%2B/g;
1109         $str =~ s/ /\+/g;
1110         return $str;
1111 }
1112
1113 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1114 sub esc_url {
1115         my $str = shift;
1116         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1117         $str =~ s/\+/%2B/g;
1118         $str =~ s/ /\+/g;
1119         return $str;
1120 }
1121
1122 # replace invalid utf8 character with SUBSTITUTION sequence
1123 sub esc_html {
1124         my $str = shift;
1125         my %opts = @_;
1126
1127         $str = to_utf8($str);
1128         $str = $cgi->escapeHTML($str);
1129         if ($opts{'-nbsp'}) {
1130                 $str =~ s/ /&nbsp;/g;
1131         }
1132         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1133         return $str;
1134 }
1135
1136 # quote control characters and escape filename to HTML
1137 sub esc_path {
1138         my $str = shift;
1139         my %opts = @_;
1140
1141         $str = to_utf8($str);
1142         $str = $cgi->escapeHTML($str);
1143         if ($opts{'-nbsp'}) {
1144                 $str =~ s/ /&nbsp;/g;
1145         }
1146         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1147         return $str;
1148 }
1149
1150 # Make control characters "printable", using character escape codes (CEC)
1151 sub quot_cec {
1152         my $cntrl = shift;
1153         my %opts = @_;
1154         my %es = ( # character escape codes, aka escape sequences
1155                 "\t" => '\t',   # tab            (HT)
1156                 "\n" => '\n',   # line feed      (LF)
1157                 "\r" => '\r',   # carrige return (CR)
1158                 "\f" => '\f',   # form feed      (FF)
1159                 "\b" => '\b',   # backspace      (BS)
1160                 "\a" => '\a',   # alarm (bell)   (BEL)
1161                 "\e" => '\e',   # escape         (ESC)
1162                 "\013" => '\v', # vertical tab   (VT)
1163                 "\000" => '\0', # nul character  (NUL)
1164         );
1165         my $chr = ( (exists $es{$cntrl})
1166                     ? $es{$cntrl}
1167                     : sprintf('\%2x', ord($cntrl)) );
1168         if ($opts{-nohtml}) {
1169                 return $chr;
1170         } else {
1171                 return "<span class=\"cntrl\">$chr</span>";
1172         }
1173 }
1174
1175 # Alternatively use unicode control pictures codepoints,
1176 # Unicode "printable representation" (PR)
1177 sub quot_upr {
1178         my $cntrl = shift;
1179         my %opts = @_;
1180
1181         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1182         if ($opts{-nohtml}) {
1183                 return $chr;
1184         } else {
1185                 return "<span class=\"cntrl\">$chr</span>";
1186         }
1187 }
1188
1189 # git may return quoted and escaped filenames
1190 sub unquote {
1191         my $str = shift;
1192
1193         sub unq {
1194                 my $seq = shift;
1195                 my %es = ( # character escape codes, aka escape sequences
1196                         't' => "\t",   # tab            (HT, TAB)
1197                         'n' => "\n",   # newline        (NL)
1198                         'r' => "\r",   # return         (CR)
1199                         'f' => "\f",   # form feed      (FF)
1200                         'b' => "\b",   # backspace      (BS)
1201                         'a' => "\a",   # alarm (bell)   (BEL)
1202                         'e' => "\e",   # escape         (ESC)
1203                         'v' => "\013", # vertical tab   (VT)
1204                 );
1205
1206                 if ($seq =~ m/^[0-7]{1,3}$/) {
1207                         # octal char sequence
1208                         return chr(oct($seq));
1209                 } elsif (exists $es{$seq}) {
1210                         # C escape sequence, aka character escape code
1211                         return $es{$seq};
1212                 }
1213                 # quoted ordinary character
1214                 return $seq;
1215         }
1216
1217         if ($str =~ m/^"(.*)"$/) {
1218                 # needs unquoting
1219                 $str = $1;
1220                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1221         }
1222         return $str;
1223 }
1224
1225 # escape tabs (convert tabs to spaces)
1226 sub untabify {
1227         my $line = shift;
1228
1229         while ((my $pos = index($line, "\t")) != -1) {
1230                 if (my $count = (8 - ($pos % 8))) {
1231                         my $spaces = ' ' x $count;
1232                         $line =~ s/\t/$spaces/;
1233                 }
1234         }
1235
1236         return $line;
1237 }
1238
1239 sub project_in_list {
1240         my $project = shift;
1241         my @list = git_get_projects_list();
1242         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1243 }
1244
1245 ## ----------------------------------------------------------------------
1246 ## HTML aware string manipulation
1247
1248 # Try to chop given string on a word boundary between position
1249 # $len and $len+$add_len. If there is no word boundary there,
1250 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1251 # (marking chopped part) would be longer than given string.
1252 sub chop_str {
1253         my $str = shift;
1254         my $len = shift;
1255         my $add_len = shift || 10;
1256         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1257
1258         # Make sure perl knows it is utf8 encoded so we don't
1259         # cut in the middle of a utf8 multibyte char.
1260         $str = to_utf8($str);
1261
1262         # allow only $len chars, but don't cut a word if it would fit in $add_len
1263         # if it doesn't fit, cut it if it's still longer than the dots we would add
1264         # remove chopped character entities entirely
1265
1266         # when chopping in the middle, distribute $len into left and right part
1267         # return early if chopping wouldn't make string shorter
1268         if ($where eq 'center') {
1269                 return $str if ($len + 5 >= length($str)); # filler is length 5
1270                 $len = int($len/2);
1271         } else {
1272                 return $str if ($len + 4 >= length($str)); # filler is length 4
1273         }
1274
1275         # regexps: ending and beginning with word part up to $add_len
1276         my $endre = qr/.{$len}\w{0,$add_len}/;
1277         my $begre = qr/\w{0,$add_len}.{$len}/;
1278
1279         if ($where eq 'left') {
1280                 $str =~ m/^(.*?)($begre)$/;
1281                 my ($lead, $body) = ($1, $2);
1282                 if (length($lead) > 4) {
1283                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1284                         $lead = " ...";
1285                 }
1286                 return "$lead$body";
1287
1288         } elsif ($where eq 'center') {
1289                 $str =~ m/^($endre)(.*)$/;
1290                 my ($left, $str)  = ($1, $2);
1291                 $str =~ m/^(.*?)($begre)$/;
1292                 my ($mid, $right) = ($1, $2);
1293                 if (length($mid) > 5) {
1294                         $left  =~ s/&[^;]*$//;
1295                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1296                         $mid = " ... ";
1297                 }
1298                 return "$left$mid$right";
1299
1300         } else {
1301                 $str =~ m/^($endre)(.*)$/;
1302                 my $body = $1;
1303                 my $tail = $2;
1304                 if (length($tail) > 4) {
1305                         $body =~ s/&[^;]*$//;
1306                         $tail = "... ";
1307                 }
1308                 return "$body$tail";
1309         }
1310 }
1311
1312 # takes the same arguments as chop_str, but also wraps a <span> around the
1313 # result with a title attribute if it does get chopped. Additionally, the
1314 # string is HTML-escaped.
1315 sub chop_and_escape_str {
1316         my ($str) = @_;
1317
1318         my $chopped = chop_str(@_);
1319         if ($chopped eq $str) {
1320                 return esc_html($chopped);
1321         } else {
1322                 $str =~ s/[[:cntrl:]]/?/g;
1323                 return $cgi->span({-title=>$str}, esc_html($chopped));
1324         }
1325 }
1326
1327 ## ----------------------------------------------------------------------
1328 ## functions returning short strings
1329
1330 # CSS class for given age value (in seconds)
1331 sub age_class {
1332         my $age = shift;
1333
1334         if (!defined $age) {
1335                 return "noage";
1336         } elsif ($age < 60*60*2) {
1337                 return "age0";
1338         } elsif ($age < 60*60*24*2) {
1339                 return "age1";
1340         } else {
1341                 return "age2";
1342         }
1343 }
1344
1345 # convert age in seconds to "nn units ago" string
1346 sub age_string {
1347         my $age = shift;
1348         my $age_str;
1349
1350         if ($age > 60*60*24*365*2) {
1351                 $age_str = (int $age/60/60/24/365);
1352                 $age_str .= " years ago";
1353         } elsif ($age > 60*60*24*(365/12)*2) {
1354                 $age_str = int $age/60/60/24/(365/12);
1355                 $age_str .= " months ago";
1356         } elsif ($age > 60*60*24*7*2) {
1357                 $age_str = int $age/60/60/24/7;
1358                 $age_str .= " weeks ago";
1359         } elsif ($age > 60*60*24*2) {
1360                 $age_str = int $age/60/60/24;
1361                 $age_str .= " days ago";
1362         } elsif ($age > 60*60*2) {
1363                 $age_str = int $age/60/60;
1364                 $age_str .= " hours ago";
1365         } elsif ($age > 60*2) {
1366                 $age_str = int $age/60;
1367                 $age_str .= " min ago";
1368         } elsif ($age > 2) {
1369                 $age_str = int $age;
1370                 $age_str .= " sec ago";
1371         } else {
1372                 $age_str .= " right now";
1373         }
1374         return $age_str;
1375 }
1376
1377 use constant {
1378         S_IFINVALID => 0030000,
1379         S_IFGITLINK => 0160000,
1380 };
1381
1382 # submodule/subproject, a commit object reference
1383 sub S_ISGITLINK {
1384         my $mode = shift;
1385
1386         return (($mode & S_IFMT) == S_IFGITLINK)
1387 }
1388
1389 # convert file mode in octal to symbolic file mode string
1390 sub mode_str {
1391         my $mode = oct shift;
1392
1393         if (S_ISGITLINK($mode)) {
1394                 return 'm---------';
1395         } elsif (S_ISDIR($mode & S_IFMT)) {
1396                 return 'drwxr-xr-x';
1397         } elsif (S_ISLNK($mode)) {
1398                 return 'lrwxrwxrwx';
1399         } elsif (S_ISREG($mode)) {
1400                 # git cares only about the executable bit
1401                 if ($mode & S_IXUSR) {
1402                         return '-rwxr-xr-x';
1403                 } else {
1404                         return '-rw-r--r--';
1405                 };
1406         } else {
1407                 return '----------';
1408         }
1409 }
1410
1411 # convert file mode in octal to file type string
1412 sub file_type {
1413         my $mode = shift;
1414
1415         if ($mode !~ m/^[0-7]+$/) {
1416                 return $mode;
1417         } else {
1418                 $mode = oct $mode;
1419         }
1420
1421         if (S_ISGITLINK($mode)) {
1422                 return "submodule";
1423         } elsif (S_ISDIR($mode & S_IFMT)) {
1424                 return "directory";
1425         } elsif (S_ISLNK($mode)) {
1426                 return "symlink";
1427         } elsif (S_ISREG($mode)) {
1428                 return "file";
1429         } else {
1430                 return "unknown";
1431         }
1432 }
1433
1434 # convert file mode in octal to file type description string
1435 sub file_type_long {
1436         my $mode = shift;
1437
1438         if ($mode !~ m/^[0-7]+$/) {
1439                 return $mode;
1440         } else {
1441                 $mode = oct $mode;
1442         }
1443
1444         if (S_ISGITLINK($mode)) {
1445                 return "submodule";
1446         } elsif (S_ISDIR($mode & S_IFMT)) {
1447                 return "directory";
1448         } elsif (S_ISLNK($mode)) {
1449                 return "symlink";
1450         } elsif (S_ISREG($mode)) {
1451                 if ($mode & S_IXUSR) {
1452                         return "executable";
1453                 } else {
1454                         return "file";
1455                 };
1456         } else {
1457                 return "unknown";
1458         }
1459 }
1460
1461
1462 ## ----------------------------------------------------------------------
1463 ## functions returning short HTML fragments, or transforming HTML fragments
1464 ## which don't belong to other sections
1465
1466 # format line of commit message.
1467 sub format_log_line_html {
1468         my $line = shift;
1469
1470         $line = esc_html($line, -nbsp=>1);
1471         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1472                 $cgi->a({-href => href(action=>"object", hash=>$1),
1473                                         -class => "text"}, $1);
1474         }eg;
1475
1476         return $line;
1477 }
1478
1479 # format marker of refs pointing to given object
1480
1481 # the destination action is chosen based on object type and current context:
1482 # - for annotated tags, we choose the tag view unless it's the current view
1483 #   already, in which case we go to shortlog view
1484 # - for other refs, we keep the current view if we're in history, shortlog or
1485 #   log view, and select shortlog otherwise
1486 sub format_ref_marker {
1487         my ($refs, $id) = @_;
1488         my $markers = '';
1489
1490         if (defined $refs->{$id}) {
1491                 foreach my $ref (@{$refs->{$id}}) {
1492                         # this code exploits the fact that non-lightweight tags are the
1493                         # only indirect objects, and that they are the only objects for which
1494                         # we want to use tag instead of shortlog as action
1495                         my ($type, $name) = qw();
1496                         my $indirect = ($ref =~ s/\^\{\}$//);
1497                         # e.g. tags/v2.6.11 or heads/next
1498                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1499                                 $type = $1;
1500                                 $name = $2;
1501                         } else {
1502                                 $type = "ref";
1503                                 $name = $ref;
1504                         }
1505
1506                         my $class = $type;
1507                         $class .= " indirect" if $indirect;
1508
1509                         my $dest_action = "shortlog";
1510
1511                         if ($indirect) {
1512                                 $dest_action = "tag" unless $action eq "tag";
1513                         } elsif ($action =~ /^(history|(short)?log)$/) {
1514                                 $dest_action = $action;
1515                         }
1516
1517                         my $dest = "";
1518                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1519                         $dest .= $ref;
1520
1521                         my $link = $cgi->a({
1522                                 -href => href(
1523                                         action=>$dest_action,
1524                                         hash=>$dest
1525                                 )}, $name);
1526
1527                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1528                                 $link . "</span>";
1529                 }
1530         }
1531
1532         if ($markers) {
1533                 return ' <span class="refs">'. $markers . '</span>';
1534         } else {
1535                 return "";
1536         }
1537 }
1538
1539 # format, perhaps shortened and with markers, title line
1540 sub format_subject_html {
1541         my ($long, $short, $href, $extra) = @_;
1542         $extra = '' unless defined($extra);
1543
1544         if (length($short) < length($long)) {
1545                 $long =~ s/[[:cntrl:]]/?/g;
1546                 return $cgi->a({-href => $href, -class => "list subject",
1547                                 -title => to_utf8($long)},
1548                        esc_html($short)) . $extra;
1549         } else {
1550                 return $cgi->a({-href => $href, -class => "list subject"},
1551                        esc_html($long)) . $extra;
1552         }
1553 }
1554
1555 # Rather than recomputing the url for an email multiple times, we cache it
1556 # after the first hit. This gives a visible benefit in views where the avatar
1557 # for the same email is used repeatedly (e.g. shortlog).
1558 # The cache is shared by all avatar engines (currently gravatar only), which
1559 # are free to use it as preferred. Since only one avatar engine is used for any
1560 # given page, there's no risk for cache conflicts.
1561 our %avatar_cache = ();
1562
1563 # Compute the picon url for a given email, by using the picon search service over at
1564 # http://www.cs.indiana.edu/picons/search.html
1565 sub picon_url {
1566         my $email = lc shift;
1567         if (!$avatar_cache{$email}) {
1568                 my ($user, $domain) = split('@', $email);
1569                 $avatar_cache{$email} =
1570                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1571                         "$domain/$user/" .
1572                         "users+domains+unknown/up/single";
1573         }
1574         return $avatar_cache{$email};
1575 }
1576
1577 # Compute the gravatar url for a given email, if it's not in the cache already.
1578 # Gravatar stores only the part of the URL before the size, since that's the
1579 # one computationally more expensive. This also allows reuse of the cache for
1580 # different sizes (for this particular engine).
1581 sub gravatar_url {
1582         my $email = lc shift;
1583         my $size = shift;
1584         $avatar_cache{$email} ||=
1585                 "http://www.gravatar.com/avatar/" .
1586                         Digest::MD5::md5_hex($email) . "?s=";
1587         return $avatar_cache{$email} . $size;
1588 }
1589
1590 # Insert an avatar for the given $email at the given $size if the feature
1591 # is enabled.
1592 sub git_get_avatar {
1593         my ($email, %opts) = @_;
1594         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1595         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1596         $opts{-size} ||= 'default';
1597         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1598         my $url = "";
1599         if ($git_avatar eq 'gravatar') {
1600                 $url = gravatar_url($email, $size);
1601         } elsif ($git_avatar eq 'picon') {
1602                 $url = picon_url($email);
1603         }
1604         # Other providers can be added by extending the if chain, defining $url
1605         # as needed. If no variant puts something in $url, we assume avatars
1606         # are completely disabled/unavailable.
1607         if ($url) {
1608                 return $pre_white .
1609                        "<img width=\"$size\" " .
1610                             "class=\"avatar\" " .
1611                             "src=\"$url\" " .
1612                             "alt=\"\" " .
1613                        "/>" . $post_white;
1614         } else {
1615                 return "";
1616         }
1617 }
1618
1619 # format the author name of the given commit with the given tag
1620 # the author name is chopped and escaped according to the other
1621 # optional parameters (see chop_str).
1622 sub format_author_html {
1623         my $tag = shift;
1624         my $co = shift;
1625         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1626         return "<$tag class=\"author\">" .
1627                git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1628                $author . "</$tag>";
1629 }
1630
1631 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1632 sub format_git_diff_header_line {
1633         my $line = shift;
1634         my $diffinfo = shift;
1635         my ($from, $to) = @_;
1636
1637         if ($diffinfo->{'nparents'}) {
1638                 # combined diff
1639                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1640                 if ($to->{'href'}) {
1641                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1642                                          esc_path($to->{'file'}));
1643                 } else { # file was deleted (no href)
1644                         $line .= esc_path($to->{'file'});
1645                 }
1646         } else {
1647                 # "ordinary" diff
1648                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1649                 if ($from->{'href'}) {
1650                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1651                                          'a/' . esc_path($from->{'file'}));
1652                 } else { # file was added (no href)
1653                         $line .= 'a/' . esc_path($from->{'file'});
1654                 }
1655                 $line .= ' ';
1656                 if ($to->{'href'}) {
1657                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1658                                          'b/' . esc_path($to->{'file'}));
1659                 } else { # file was deleted
1660                         $line .= 'b/' . esc_path($to->{'file'});
1661                 }
1662         }
1663
1664         return "<div class=\"diff header\">$line</div>\n";
1665 }
1666
1667 # format extended diff header line, before patch itself
1668 sub format_extended_diff_header_line {
1669         my $line = shift;
1670         my $diffinfo = shift;
1671         my ($from, $to) = @_;
1672
1673         # match <path>
1674         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1675                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1676                                        esc_path($from->{'file'}));
1677         }
1678         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1679                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1680                                  esc_path($to->{'file'}));
1681         }
1682         # match single <mode>
1683         if ($line =~ m/\s(\d{6})$/) {
1684                 $line .= '<span class="info"> (' .
1685                          file_type_long($1) .
1686                          ')</span>';
1687         }
1688         # match <hash>
1689         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1690                 # can match only for combined diff
1691                 $line = 'index ';
1692                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1693                         if ($from->{'href'}[$i]) {
1694                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1695                                                   -class=>"hash"},
1696                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1697                         } else {
1698                                 $line .= '0' x 7;
1699                         }
1700                         # separator
1701                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1702                 }
1703                 $line .= '..';
1704                 if ($to->{'href'}) {
1705                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1706                                          substr($diffinfo->{'to_id'},0,7));
1707                 } else {
1708                         $line .= '0' x 7;
1709                 }
1710
1711         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1712                 # can match only for ordinary diff
1713                 my ($from_link, $to_link);
1714                 if ($from->{'href'}) {
1715                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1716                                              substr($diffinfo->{'from_id'},0,7));
1717                 } else {
1718                         $from_link = '0' x 7;
1719                 }
1720                 if ($to->{'href'}) {
1721                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1722                                            substr($diffinfo->{'to_id'},0,7));
1723                 } else {
1724                         $to_link = '0' x 7;
1725                 }
1726                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1727                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1728         }
1729
1730         return $line . "<br/>\n";
1731 }
1732
1733 # format from-file/to-file diff header
1734 sub format_diff_from_to_header {
1735         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1736         my $line;
1737         my $result = '';
1738
1739         $line = $from_line;
1740         #assert($line =~ m/^---/) if DEBUG;
1741         # no extra formatting for "^--- /dev/null"
1742         if (! $diffinfo->{'nparents'}) {
1743                 # ordinary (single parent) diff
1744                 if ($line =~ m!^--- "?a/!) {
1745                         if ($from->{'href'}) {
1746                                 $line = '--- a/' .
1747                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1748                                                 esc_path($from->{'file'}));
1749                         } else {
1750                                 $line = '--- a/' .
1751                                         esc_path($from->{'file'});
1752                         }
1753                 }
1754                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1755
1756         } else {
1757                 # combined diff (merge commit)
1758                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1759                         if ($from->{'href'}[$i]) {
1760                                 $line = '--- ' .
1761                                         $cgi->a({-href=>href(action=>"blobdiff",
1762                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1763                                                              hash_parent_base=>$parents[$i],
1764                                                              file_parent=>$from->{'file'}[$i],
1765                                                              hash=>$diffinfo->{'to_id'},
1766                                                              hash_base=>$hash,
1767                                                              file_name=>$to->{'file'}),
1768                                                  -class=>"path",
1769                                                  -title=>"diff" . ($i+1)},
1770                                                 $i+1) .
1771                                         '/' .
1772                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1773                                                 esc_path($from->{'file'}[$i]));
1774                         } else {
1775                                 $line = '--- /dev/null';
1776                         }
1777                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1778                 }
1779         }
1780
1781         $line = $to_line;
1782         #assert($line =~ m/^\+\+\+/) if DEBUG;
1783         # no extra formatting for "^+++ /dev/null"
1784         if ($line =~ m!^\+\+\+ "?b/!) {
1785                 if ($to->{'href'}) {
1786                         $line = '+++ b/' .
1787                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1788                                         esc_path($to->{'file'}));
1789                 } else {
1790                         $line = '+++ b/' .
1791                                 esc_path($to->{'file'});
1792                 }
1793         }
1794         $result .= qq!<div class="diff to_file">$line</div>\n!;
1795
1796         return $result;
1797 }
1798
1799 # create note for patch simplified by combined diff
1800 sub format_diff_cc_simplified {
1801         my ($diffinfo, @parents) = @_;
1802         my $result = '';
1803
1804         $result .= "<div class=\"diff header\">" .
1805                    "diff --cc ";
1806         if (!is_deleted($diffinfo)) {
1807                 $result .= $cgi->a({-href => href(action=>"blob",
1808                                                   hash_base=>$hash,
1809                                                   hash=>$diffinfo->{'to_id'},
1810                                                   file_name=>$diffinfo->{'to_file'}),
1811                                     -class => "path"},
1812                                    esc_path($diffinfo->{'to_file'}));
1813         } else {
1814                 $result .= esc_path($diffinfo->{'to_file'});
1815         }
1816         $result .= "</div>\n" . # class="diff header"
1817                    "<div class=\"diff nodifferences\">" .
1818                    "Simple merge" .
1819                    "</div>\n"; # class="diff nodifferences"
1820
1821         return $result;
1822 }
1823
1824 # format patch (diff) line (not to be used for diff headers)
1825 sub format_diff_line {
1826         my $line = shift;
1827         my ($from, $to) = @_;
1828         my $diff_class = "";
1829
1830         chomp $line;
1831
1832         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1833                 # combined diff
1834                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1835                 if ($line =~ m/^\@{3}/) {
1836                         $diff_class = " chunk_header";
1837                 } elsif ($line =~ m/^\\/) {
1838                         $diff_class = " incomplete";
1839                 } elsif ($prefix =~ tr/+/+/) {
1840                         $diff_class = " add";
1841                 } elsif ($prefix =~ tr/-/-/) {
1842                         $diff_class = " rem";
1843                 }
1844         } else {
1845                 # assume ordinary diff
1846                 my $char = substr($line, 0, 1);
1847                 if ($char eq '+') {
1848                         $diff_class = " add";
1849                 } elsif ($char eq '-') {
1850                         $diff_class = " rem";
1851                 } elsif ($char eq '@') {
1852                         $diff_class = " chunk_header";
1853                 } elsif ($char eq "\\") {
1854                         $diff_class = " incomplete";
1855                 }
1856         }
1857         $line = untabify($line);
1858         if ($from && $to && $line =~ m/^\@{2} /) {
1859                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1860                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1861
1862                 $from_lines = 0 unless defined $from_lines;
1863                 $to_lines   = 0 unless defined $to_lines;
1864
1865                 if ($from->{'href'}) {
1866                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1867                                              -class=>"list"}, $from_text);
1868                 }
1869                 if ($to->{'href'}) {
1870                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1871                                              -class=>"list"}, $to_text);
1872                 }
1873                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1874                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1875                 return "<div class=\"diff$diff_class\">$line</div>\n";
1876         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1877                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1878                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1879
1880                 @from_text = split(' ', $ranges);
1881                 for (my $i = 0; $i < @from_text; ++$i) {
1882                         ($from_start[$i], $from_nlines[$i]) =
1883                                 (split(',', substr($from_text[$i], 1)), 0);
1884                 }
1885
1886                 $to_text   = pop @from_text;
1887                 $to_start  = pop @from_start;
1888                 $to_nlines = pop @from_nlines;
1889
1890                 $line = "<span class=\"chunk_info\">$prefix ";
1891                 for (my $i = 0; $i < @from_text; ++$i) {
1892                         if ($from->{'href'}[$i]) {
1893                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1894                                                   -class=>"list"}, $from_text[$i]);
1895                         } else {
1896                                 $line .= $from_text[$i];
1897                         }
1898                         $line .= " ";
1899                 }
1900                 if ($to->{'href'}) {
1901                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1902                                           -class=>"list"}, $to_text);
1903                 } else {
1904                         $line .= $to_text;
1905                 }
1906                 $line .= " $prefix</span>" .
1907                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1908                 return "<div class=\"diff$diff_class\">$line</div>\n";
1909         }
1910         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1911 }
1912
1913 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1914 # linked.  Pass the hash of the tree/commit to snapshot.
1915 sub format_snapshot_links {
1916         my ($hash) = @_;
1917         my $num_fmts = @snapshot_fmts;
1918         if ($num_fmts > 1) {
1919                 # A parenthesized list of links bearing format names.
1920                 # e.g. "snapshot (_tar.gz_ _zip_)"
1921                 return "snapshot (" . join(' ', map
1922                         $cgi->a({
1923                                 -href => href(
1924                                         action=>"snapshot",
1925                                         hash=>$hash,
1926                                         snapshot_format=>$_
1927                                 )
1928                         }, $known_snapshot_formats{$_}{'display'})
1929                 , @snapshot_fmts) . ")";
1930         } elsif ($num_fmts == 1) {
1931                 # A single "snapshot" link whose tooltip bears the format name.
1932                 # i.e. "_snapshot_"
1933                 my ($fmt) = @snapshot_fmts;
1934                 return
1935                         $cgi->a({
1936                                 -href => href(
1937                                         action=>"snapshot",
1938                                         hash=>$hash,
1939                                         snapshot_format=>$fmt
1940                                 ),
1941                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1942                         }, "snapshot");
1943         } else { # $num_fmts == 0
1944                 return undef;
1945         }
1946 }
1947
1948 ## ......................................................................
1949 ## functions returning values to be passed, perhaps after some
1950 ## transformation, to other functions; e.g. returning arguments to href()
1951
1952 # returns hash to be passed to href to generate gitweb URL
1953 # in -title key it returns description of link
1954 sub get_feed_info {
1955         my $format = shift || 'Atom';
1956         my %res = (action => lc($format));
1957
1958         # feed links are possible only for project views
1959         return unless (defined $project);
1960         # some views should link to OPML, or to generic project feed,
1961         # or don't have specific feed yet (so they should use generic)
1962         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1963
1964         my $branch;
1965         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1966         # from tag links; this also makes possible to detect branch links
1967         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1968             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1969                 $branch = $1;
1970         }
1971         # find log type for feed description (title)
1972         my $type = 'log';
1973         if (defined $file_name) {
1974                 $type  = "history of $file_name";
1975                 $type .= "/" if ($action eq 'tree');
1976                 $type .= " on '$branch'" if (defined $branch);
1977         } else {
1978                 $type = "log of $branch" if (defined $branch);
1979         }
1980
1981         $res{-title} = $type;
1982         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1983         $res{'file_name'} = $file_name;
1984
1985         return %res;
1986 }
1987
1988 ## ----------------------------------------------------------------------
1989 ## git utility subroutines, invoking git commands
1990
1991 # returns path to the core git executable and the --git-dir parameter as list
1992 sub git_cmd {
1993         $number_of_git_cmds++;
1994         return $GIT, '--git-dir='.$git_dir;
1995 }
1996
1997 # quote the given arguments for passing them to the shell
1998 # quote_command("command", "arg 1", "arg with ' and ! characters")
1999 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2000 # Try to avoid using this function wherever possible.
2001 sub quote_command {
2002         return join(' ',
2003                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2004 }
2005
2006 # get HEAD ref of given project as hash
2007 sub git_get_head_hash {
2008         my $project = shift;
2009         my $o_git_dir = $git_dir;
2010         my $retval = undef;
2011         $git_dir = "$projectroot/$project";
2012         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
2013                 my $head = <$fd>;
2014                 close $fd;
2015                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
2016                         $retval = $1;
2017                 }
2018         }
2019         if (defined $o_git_dir) {
2020                 $git_dir = $o_git_dir;
2021         }
2022         return $retval;
2023 }
2024
2025 # get type of given object
2026 sub git_get_type {
2027         my $hash = shift;
2028
2029         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2030         my $type = <$fd>;
2031         close $fd or return;
2032         chomp $type;
2033         return $type;
2034 }
2035
2036 # repository configuration
2037 our $config_file = '';
2038 our %config;
2039
2040 # store multiple values for single key as anonymous array reference
2041 # single values stored directly in the hash, not as [ <value> ]
2042 sub hash_set_multi {
2043         my ($hash, $key, $value) = @_;
2044
2045         if (!exists $hash->{$key}) {
2046                 $hash->{$key} = $value;
2047         } elsif (!ref $hash->{$key}) {
2048                 $hash->{$key} = [ $hash->{$key}, $value ];
2049         } else {
2050                 push @{$hash->{$key}}, $value;
2051         }
2052 }
2053
2054 # return hash of git project configuration
2055 # optionally limited to some section, e.g. 'gitweb'
2056 sub git_parse_project_config {
2057         my $section_regexp = shift;
2058         my %config;
2059
2060         local $/ = "\0";
2061
2062         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2063                 or return;
2064
2065         while (my $keyval = <$fh>) {
2066                 chomp $keyval;
2067                 my ($key, $value) = split(/\n/, $keyval, 2);
2068
2069                 hash_set_multi(\%config, $key, $value)
2070                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2071         }
2072         close $fh;
2073
2074         return %config;
2075 }
2076
2077 # convert config value to boolean: 'true' or 'false'
2078 # no value, number > 0, 'true' and 'yes' values are true
2079 # rest of values are treated as false (never as error)
2080 sub config_to_bool {
2081         my $val = shift;
2082
2083         return 1 if !defined $val;             # section.key
2084
2085         # strip leading and trailing whitespace
2086         $val =~ s/^\s+//;
2087         $val =~ s/\s+$//;
2088
2089         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2090                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2091 }
2092
2093 # convert config value to simple decimal number
2094 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2095 # to be multiplied by 1024, 1048576, or 1073741824
2096 sub config_to_int {
2097         my $val = shift;
2098
2099         # strip leading and trailing whitespace
2100         $val =~ s/^\s+//;
2101         $val =~ s/\s+$//;
2102
2103         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2104                 $unit = lc($unit);
2105                 # unknown unit is treated as 1
2106                 return $num * ($unit eq 'g' ? 1073741824 :
2107                                $unit eq 'm' ?    1048576 :
2108                                $unit eq 'k' ?       1024 : 1);
2109         }
2110         return $val;
2111 }
2112
2113 # convert config value to array reference, if needed
2114 sub config_to_multi {
2115         my $val = shift;
2116
2117         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2118 }
2119
2120 sub git_get_project_config {
2121         my ($key, $type) = @_;
2122
2123         # key sanity check
2124         return unless ($key);
2125         $key =~ s/^gitweb\.//;
2126         return if ($key =~ m/\W/);
2127
2128         # type sanity check
2129         if (defined $type) {
2130                 $type =~ s/^--//;
2131                 $type = undef
2132                         unless ($type eq 'bool' || $type eq 'int');
2133         }
2134
2135         # get config
2136         if (!defined $config_file ||
2137             $config_file ne "$git_dir/config") {
2138                 %config = git_parse_project_config('gitweb');
2139                 $config_file = "$git_dir/config";
2140         }
2141
2142         # check if config variable (key) exists
2143         return unless exists $config{"gitweb.$key"};
2144
2145         # ensure given type
2146         if (!defined $type) {
2147                 return $config{"gitweb.$key"};
2148         } elsif ($type eq 'bool') {
2149                 # backward compatibility: 'git config --bool' returns true/false
2150                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2151         } elsif ($type eq 'int') {
2152                 return config_to_int($config{"gitweb.$key"});
2153         }
2154         return $config{"gitweb.$key"};
2155 }
2156
2157 # get hash of given path at given ref
2158 sub git_get_hash_by_path {
2159         my $base = shift;
2160         my $path = shift || return undef;
2161         my $type = shift;
2162
2163         $path =~ s,/+$,,;
2164
2165         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2166                 or die_error(500, "Open git-ls-tree failed");
2167         my $line = <$fd>;
2168         close $fd or return undef;
2169
2170         if (!defined $line) {
2171                 # there is no tree or hash given by $path at $base
2172                 return undef;
2173         }
2174
2175         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2176         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2177         if (defined $type && $type ne $2) {
2178                 # type doesn't match
2179                 return undef;
2180         }
2181         return $3;
2182 }
2183
2184 # get path of entry with given hash at given tree-ish (ref)
2185 # used to get 'from' filename for combined diff (merge commit) for renames
2186 sub git_get_path_by_hash {
2187         my $base = shift || return;
2188         my $hash = shift || return;
2189
2190         local $/ = "\0";
2191
2192         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2193                 or return undef;
2194         while (my $line = <$fd>) {
2195                 chomp $line;
2196
2197                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2198                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2199                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2200                         close $fd;
2201                         return $1;
2202                 }
2203         }
2204         close $fd;
2205         return undef;
2206 }
2207
2208 ## ......................................................................
2209 ## git utility functions, directly accessing git repository
2210
2211 sub git_get_project_description {
2212         my $path = shift;
2213
2214         $git_dir = "$projectroot/$path";
2215         open my $fd, '<', "$git_dir/description"
2216                 or return git_get_project_config('description');
2217         my $descr = <$fd>;
2218         close $fd;
2219         if (defined $descr) {
2220                 chomp $descr;
2221         }
2222         return $descr;
2223 }
2224
2225 sub git_get_project_ctags {
2226         my $path = shift;
2227         my $ctags = {};
2228
2229         $git_dir = "$projectroot/$path";
2230         opendir my $dh, "$git_dir/ctags"
2231                 or return $ctags;
2232         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2233                 open my $ct, '<', $_ or next;
2234                 my $val = <$ct>;
2235                 chomp $val;
2236                 close $ct;
2237                 my $ctag = $_; $ctag =~ s#.*/##;
2238                 $ctags->{$ctag} = $val;
2239         }
2240         closedir $dh;
2241         $ctags;
2242 }
2243
2244 sub git_populate_project_tagcloud {
2245         my $ctags = shift;
2246
2247         # First, merge different-cased tags; tags vote on casing
2248         my %ctags_lc;
2249         foreach (keys %$ctags) {
2250                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2251                 if (not $ctags_lc{lc $_}->{topcount}
2252                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2253                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2254                         $ctags_lc{lc $_}->{topname} = $_;
2255                 }
2256         }
2257
2258         my $cloud;
2259         if (eval { require HTML::TagCloud; 1; }) {
2260                 $cloud = HTML::TagCloud->new;
2261                 foreach (sort keys %ctags_lc) {
2262                         # Pad the title with spaces so that the cloud looks
2263                         # less crammed.
2264                         my $title = $ctags_lc{$_}->{topname};
2265                         $title =~ s/ /&nbsp;/g;
2266                         $title =~ s/^/&nbsp;/g;
2267                         $title =~ s/$/&nbsp;/g;
2268                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2269                 }
2270         } else {
2271                 $cloud = \%ctags_lc;
2272         }
2273         $cloud;
2274 }
2275
2276 sub git_show_project_tagcloud {
2277         my ($cloud, $count) = @_;
2278         print STDERR ref($cloud)."..\n";
2279         if (ref $cloud eq 'HTML::TagCloud') {
2280                 return $cloud->html_and_css($count);
2281         } else {
2282                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2283                 return '<p align="center">' . join (', ', map {
2284                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2285                 } splice(@tags, 0, $count)) . '</p>';
2286         }
2287 }
2288
2289 sub git_get_project_url_list {
2290         my $path = shift;
2291
2292         $git_dir = "$projectroot/$path";
2293         open my $fd, '<', "$git_dir/cloneurl"
2294                 or return wantarray ?
2295                 @{ config_to_multi(git_get_project_config('url')) } :
2296                    config_to_multi(git_get_project_config('url'));
2297         my @git_project_url_list = map { chomp; $_ } <$fd>;
2298         close $fd;
2299
2300         return wantarray ? @git_project_url_list : \@git_project_url_list;
2301 }
2302
2303 sub git_get_projects_list {
2304         my ($filter) = @_;
2305         my @list;
2306
2307         $filter ||= '';
2308         $filter =~ s/\.git$//;
2309
2310         my $check_forks = gitweb_check_feature('forks');
2311
2312         if (-d $projects_list) {
2313                 # search in directory
2314                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2315                 # remove the trailing "/"
2316                 $dir =~ s!/+$!!;
2317                 my $pfxlen = length("$dir");
2318                 my $pfxdepth = ($dir =~ tr!/!!);
2319
2320                 File::Find::find({
2321                         follow_fast => 1, # follow symbolic links
2322                         follow_skip => 2, # ignore duplicates
2323                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2324                         wanted => sub {
2325                                 # skip project-list toplevel, if we get it.
2326                                 return if (m!^[/.]$!);
2327                                 # only directories can be git repositories
2328                                 return unless (-d $_);
2329                                 # don't traverse too deep (Find is super slow on os x)
2330                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2331                                         $File::Find::prune = 1;
2332                                         return;
2333                                 }
2334
2335                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2336                                 # we check related file in $projectroot
2337                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2338                                 if (check_export_ok("$projectroot/$path")) {
2339                                         push @list, { path => $path };
2340                                         $File::Find::prune = 1;
2341                                 }
2342                         },
2343                 }, "$dir");
2344
2345         } elsif (-f $projects_list) {
2346                 # read from file(url-encoded):
2347                 # 'git%2Fgit.git Linus+Torvalds'
2348                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2349                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2350                 my %paths;
2351                 open my $fd, '<', $projects_list or return;
2352         PROJECT:
2353                 while (my $line = <$fd>) {
2354                         chomp $line;
2355                         my ($path, $owner) = split ' ', $line;
2356                         $path = unescape($path);
2357                         $owner = unescape($owner);
2358                         if (!defined $path) {
2359                                 next;
2360                         }
2361                         if ($filter ne '') {
2362                                 # looking for forks;
2363                                 my $pfx = substr($path, 0, length($filter));
2364                                 if ($pfx ne $filter) {
2365                                         next PROJECT;
2366                                 }
2367                                 my $sfx = substr($path, length($filter));
2368                                 if ($sfx !~ /^\/.*\.git$/) {
2369                                         next PROJECT;
2370                                 }
2371                         } elsif ($check_forks) {
2372                         PATH:
2373                                 foreach my $filter (keys %paths) {
2374                                         # looking for forks;
2375                                         my $pfx = substr($path, 0, length($filter));
2376                                         if ($pfx ne $filter) {
2377                                                 next PATH;
2378                                         }
2379                                         my $sfx = substr($path, length($filter));
2380                                         if ($sfx !~ /^\/.*\.git$/) {
2381                                                 next PATH;
2382                                         }
2383                                         # is a fork, don't include it in
2384                                         # the list
2385                                         next PROJECT;
2386                                 }
2387                         }
2388                         if (check_export_ok("$projectroot/$path")) {
2389                                 my $pr = {
2390                                         path => $path,
2391                                         owner => to_utf8($owner),
2392                                 };
2393                                 push @list, $pr;
2394                                 (my $forks_path = $path) =~ s/\.git$//;
2395                                 $paths{$forks_path}++;
2396                         }
2397                 }
2398                 close $fd;
2399         }
2400         return @list;
2401 }
2402
2403 our $gitweb_project_owner = undef;
2404 sub git_get_project_list_from_file {
2405
2406         return if (defined $gitweb_project_owner);
2407
2408         $gitweb_project_owner = {};
2409         # read from file (url-encoded):
2410         # 'git%2Fgit.git Linus+Torvalds'
2411         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2412         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2413         if (-f $projects_list) {
2414                 open(my $fd, '<', $projects_list);
2415                 while (my $line = <$fd>) {
2416                         chomp $line;
2417                         my ($pr, $ow) = split ' ', $line;
2418                         $pr = unescape($pr);
2419                         $ow = unescape($ow);
2420                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2421                 }
2422                 close $fd;
2423         }
2424 }
2425
2426 sub git_get_project_owner {
2427         my $project = shift;
2428         my $owner;
2429
2430         return undef unless $project;
2431         $git_dir = "$projectroot/$project";
2432
2433         if (!defined $gitweb_project_owner) {
2434                 git_get_project_list_from_file();
2435         }
2436
2437         if (exists $gitweb_project_owner->{$project}) {
2438                 $owner = $gitweb_project_owner->{$project};
2439         }
2440         if (!defined $owner){
2441                 $owner = git_get_project_config('owner');
2442         }
2443         if (!defined $owner) {
2444                 $owner = get_file_owner("$git_dir");
2445         }
2446
2447         return $owner;
2448 }
2449
2450 sub git_get_last_activity {
2451         my ($path) = @_;
2452         my $fd;
2453
2454         $git_dir = "$projectroot/$path";
2455         open($fd, "-|", git_cmd(), 'for-each-ref',
2456              '--format=%(committer)',
2457              '--sort=-committerdate',
2458              '--count=1',
2459              'refs/heads') or return;
2460         my $most_recent = <$fd>;
2461         close $fd or return;
2462         if (defined $most_recent &&
2463             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2464                 my $timestamp = $1;
2465                 my $age = time - $timestamp;
2466                 return ($age, age_string($age));
2467         }
2468         return (undef, undef);
2469 }
2470
2471 sub git_get_references {
2472         my $type = shift || "";
2473         my %refs;
2474         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2475         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2476         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2477                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2478                 or return;
2479
2480         while (my $line = <$fd>) {
2481                 chomp $line;
2482                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2483                         if (defined $refs{$1}) {
2484                                 push @{$refs{$1}}, $2;
2485                         } else {
2486                                 $refs{$1} = [ $2 ];
2487                         }
2488                 }
2489         }
2490         close $fd or return;
2491         return \%refs;
2492 }
2493
2494 sub git_get_rev_name_tags {
2495         my $hash = shift || return undef;
2496
2497         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2498                 or return;
2499         my $name_rev = <$fd>;
2500         close $fd;
2501
2502         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2503                 return $1;
2504         } else {
2505                 # catches also '$hash undefined' output
2506                 return undef;
2507         }
2508 }
2509
2510 ## ----------------------------------------------------------------------
2511 ## parse to hash functions
2512
2513 sub parse_date {
2514         my $epoch = shift;
2515         my $tz = shift || "-0000";
2516
2517         my %date;
2518         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2519         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2520         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2521         $date{'hour'} = $hour;
2522         $date{'minute'} = $min;
2523         $date{'mday'} = $mday;
2524         $date{'day'} = $days[$wday];
2525         $date{'month'} = $months[$mon];
2526         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2527                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2528         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2529                              $mday, $months[$mon], $hour ,$min;
2530         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2531                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2532
2533         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2534         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2535         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2536         $date{'hour_local'} = $hour;
2537         $date{'minute_local'} = $min;
2538         $date{'tz_local'} = $tz;
2539         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2540                                   1900+$year, $mon+1, $mday,
2541                                   $hour, $min, $sec, $tz);
2542         return %date;
2543 }
2544
2545 sub parse_tag {
2546         my $tag_id = shift;
2547         my %tag;
2548         my @comment;
2549
2550         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2551         $tag{'id'} = $tag_id;
2552         while (my $line = <$fd>) {
2553                 chomp $line;
2554                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2555                         $tag{'object'} = $1;
2556                 } elsif ($line =~ m/^type (.+)$/) {
2557                         $tag{'type'} = $1;
2558                 } elsif ($line =~ m/^tag (.+)$/) {
2559                         $tag{'name'} = $1;
2560                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2561                         $tag{'author'} = $1;
2562                         $tag{'author_epoch'} = $2;
2563                         $tag{'author_tz'} = $3;
2564                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2565                                 $tag{'author_name'}  = $1;
2566                                 $tag{'author_email'} = $2;
2567                         } else {
2568                                 $tag{'author_name'} = $tag{'author'};
2569                         }
2570                 } elsif ($line =~ m/--BEGIN/) {
2571                         push @comment, $line;
2572                         last;
2573                 } elsif ($line eq "") {
2574                         last;
2575                 }
2576         }
2577         push @comment, <$fd>;
2578         $tag{'comment'} = \@comment;
2579         close $fd or return;
2580         if (!defined $tag{'name'}) {
2581                 return
2582         };
2583         return %tag
2584 }
2585
2586 sub parse_commit_text {
2587         my ($commit_text, $withparents) = @_;
2588         my @commit_lines = split '\n', $commit_text;
2589         my %co;
2590
2591         pop @commit_lines; # Remove '\0'
2592
2593         if (! @commit_lines) {
2594                 return;
2595         }
2596
2597         my $header = shift @commit_lines;
2598         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2599                 return;
2600         }
2601         ($co{'id'}, my @parents) = split ' ', $header;
2602         while (my $line = shift @commit_lines) {
2603                 last if $line eq "\n";
2604                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2605                         $co{'tree'} = $1;
2606                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2607                         push @parents, $1;
2608                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2609                         $co{'author'} = to_utf8($1);
2610                         $co{'author_epoch'} = $2;
2611                         $co{'author_tz'} = $3;
2612                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2613                                 $co{'author_name'}  = $1;
2614                                 $co{'author_email'} = $2;
2615                         } else {
2616                                 $co{'author_name'} = $co{'author'};
2617                         }
2618                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2619                         $co{'committer'} = to_utf8($1);
2620                         $co{'committer_epoch'} = $2;
2621                         $co{'committer_tz'} = $3;
2622                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2623                                 $co{'committer_name'}  = $1;
2624                                 $co{'committer_email'} = $2;
2625                         } else {
2626                                 $co{'committer_name'} = $co{'committer'};
2627                         }
2628                 }
2629         }
2630         if (!defined $co{'tree'}) {
2631                 return;
2632         };
2633         $co{'parents'} = \@parents;
2634         $co{'parent'} = $parents[0];
2635
2636         foreach my $title (@commit_lines) {
2637                 $title =~ s/^    //;
2638                 if ($title ne "") {
2639                         $co{'title'} = chop_str($title, 80, 5);
2640                         # remove leading stuff of merges to make the interesting part visible
2641                         if (length($title) > 50) {
2642                                 $title =~ s/^Automatic //;
2643                                 $title =~ s/^merge (of|with) /Merge ... /i;
2644                                 if (length($title) > 50) {
2645                                         $title =~ s/(http|rsync):\/\///;
2646                                 }
2647                                 if (length($title) > 50) {
2648                                         $title =~ s/(master|www|rsync)\.//;
2649                                 }
2650                                 if (length($title) > 50) {
2651                                         $title =~ s/kernel.org:?//;
2652                                 }
2653                                 if (length($title) > 50) {
2654                                         $title =~ s/\/pub\/scm//;
2655                                 }
2656                         }
2657                         $co{'title_short'} = chop_str($title, 50, 5);
2658                         last;
2659                 }
2660         }
2661         if (! defined $co{'title'} || $co{'title'} eq "") {
2662                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2663         }
2664         # remove added spaces
2665         foreach my $line (@commit_lines) {
2666                 $line =~ s/^    //;
2667         }
2668         $co{'comment'} = \@commit_lines;
2669
2670         my $age = time - $co{'committer_epoch'};
2671         $co{'age'} = $age;
2672         $co{'age_string'} = age_string($age);
2673         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2674         if ($age > 60*60*24*7*2) {
2675                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2676                 $co{'age_string_age'} = $co{'age_string'};
2677         } else {
2678                 $co{'age_string_date'} = $co{'age_string'};
2679                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2680         }
2681         return %co;
2682 }
2683
2684 sub parse_commit {
2685         my ($commit_id) = @_;
2686         my %co;
2687
2688         local $/ = "\0";
2689
2690         open my $fd, "-|", git_cmd(), "rev-list",
2691                 "--parents",
2692                 "--header",
2693                 "--max-count=1",
2694                 $commit_id,
2695                 "--",
2696                 or die_error(500, "Open git-rev-list failed");
2697         %co = parse_commit_text(<$fd>, 1);
2698         close $fd;
2699
2700         return %co;
2701 }
2702
2703 sub parse_commits {
2704         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2705         my @cos;
2706
2707         $maxcount ||= 1;
2708         $skip ||= 0;
2709
2710         local $/ = "\0";
2711
2712         open my $fd, "-|", git_cmd(), "rev-list",
2713                 "--header",
2714                 @args,
2715                 ("--max-count=" . $maxcount),
2716                 ("--skip=" . $skip),
2717                 @extra_options,
2718                 $commit_id,
2719                 "--",
2720                 ($filename ? ($filename) : ())
2721                 or die_error(500, "Open git-rev-list failed");
2722         while (my $line = <$fd>) {
2723                 my %co = parse_commit_text($line);
2724                 push @cos, \%co;
2725         }
2726         close $fd;
2727
2728         return wantarray ? @cos : \@cos;
2729 }
2730
2731 # parse line of git-diff-tree "raw" output
2732 sub parse_difftree_raw_line {
2733         my $line = shift;
2734         my %res;
2735
2736         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2737         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2738         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2739                 $res{'from_mode'} = $1;
2740                 $res{'to_mode'} = $2;
2741                 $res{'from_id'} = $3;
2742                 $res{'to_id'} = $4;
2743                 $res{'status'} = $5;
2744                 $res{'similarity'} = $6;
2745                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2746                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2747                 } else {
2748                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2749                 }
2750         }
2751         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2752         # combined diff (for merge commit)
2753         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2754                 $res{'nparents'}  = length($1);
2755                 $res{'from_mode'} = [ split(' ', $2) ];
2756                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2757                 $res{'from_id'} = [ split(' ', $3) ];
2758                 $res{'to_id'} = pop @{$res{'from_id'}};
2759                 $res{'status'} = [ split('', $4) ];
2760                 $res{'to_file'} = unquote($5);
2761         }
2762         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2763         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2764                 $res{'commit'} = $1;
2765         }
2766
2767         return wantarray ? %res : \%res;
2768 }
2769
2770 # wrapper: return parsed line of git-diff-tree "raw" output
2771 # (the argument might be raw line, or parsed info)
2772 sub parsed_difftree_line {
2773         my $line_or_ref = shift;
2774
2775         if (ref($line_or_ref) eq "HASH") {
2776                 # pre-parsed (or generated by hand)
2777                 return $line_or_ref;
2778         } else {
2779                 return parse_difftree_raw_line($line_or_ref);
2780         }
2781 }
2782
2783 # parse line of git-ls-tree output
2784 sub parse_ls_tree_line {
2785         my $line = shift;
2786         my %opts = @_;
2787         my %res;
2788
2789         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2790         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2791
2792         $res{'mode'} = $1;
2793         $res{'type'} = $2;
2794         $res{'hash'} = $3;
2795         if ($opts{'-z'}) {
2796                 $res{'name'} = $4;
2797         } else {
2798                 $res{'name'} = unquote($4);
2799         }
2800
2801         return wantarray ? %res : \%res;
2802 }
2803
2804 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2805 sub parse_from_to_diffinfo {
2806         my ($diffinfo, $from, $to, @parents) = @_;
2807
2808         if ($diffinfo->{'nparents'}) {
2809                 # combined diff
2810                 $from->{'file'} = [];
2811                 $from->{'href'} = [];
2812                 fill_from_file_info($diffinfo, @parents)
2813                         unless exists $diffinfo->{'from_file'};
2814                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2815                         $from->{'file'}[$i] =
2816                                 defined $diffinfo->{'from_file'}[$i] ?
2817                                         $diffinfo->{'from_file'}[$i] :
2818                                         $diffinfo->{'to_file'};
2819                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2820                                 $from->{'href'}[$i] = href(action=>"blob",
2821                                                            hash_base=>$parents[$i],
2822                                                            hash=>$diffinfo->{'from_id'}[$i],
2823                                                            file_name=>$from->{'file'}[$i]);
2824                         } else {
2825                                 $from->{'href'}[$i] = undef;
2826                         }
2827                 }
2828         } else {
2829                 # ordinary (not combined) diff
2830                 $from->{'file'} = $diffinfo->{'from_file'};
2831                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2832                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2833                                                hash=>$diffinfo->{'from_id'},
2834                                                file_name=>$from->{'file'});
2835                 } else {
2836                         delete $from->{'href'};
2837                 }
2838         }
2839
2840         $to->{'file'} = $diffinfo->{'to_file'};
2841         if (!is_deleted($diffinfo)) { # file exists in result
2842                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2843                                      hash=>$diffinfo->{'to_id'},
2844                                      file_name=>$to->{'file'});
2845         } else {
2846                 delete $to->{'href'};
2847         }
2848 }
2849
2850 ## ......................................................................
2851 ## parse to array of hashes functions
2852
2853 sub git_get_heads_list {
2854         my $limit = shift;
2855         my @headslist;
2856
2857         open my $fd, '-|', git_cmd(), 'for-each-ref',
2858                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2859                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2860                 'refs/heads'
2861                 or return;
2862         while (my $line = <$fd>) {
2863                 my %ref_item;
2864
2865                 chomp $line;
2866                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2867                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2868                 my ($committer, $epoch, $tz) =
2869                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2870                 $ref_item{'fullname'}  = $name;
2871                 $name =~ s!^refs/heads/!!;
2872
2873                 $ref_item{'name'}  = $name;
2874                 $ref_item{'id'}    = $hash;
2875                 $ref_item{'title'} = $title || '(no commit message)';
2876                 $ref_item{'epoch'} = $epoch;
2877                 if ($epoch) {
2878                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2879                 } else {
2880                         $ref_item{'age'} = "unknown";
2881                 }
2882
2883                 push @headslist, \%ref_item;
2884         }
2885         close $fd;
2886
2887         return wantarray ? @headslist : \@headslist;
2888 }
2889
2890 sub git_get_tags_list {
2891         my $limit = shift;
2892         my @tagslist;
2893
2894         open my $fd, '-|', git_cmd(), 'for-each-ref',
2895                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2896                 '--format=%(objectname) %(objecttype) %(refname) '.
2897                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2898                 'refs/tags'
2899                 or return;
2900         while (my $line = <$fd>) {
2901                 my %ref_item;
2902
2903                 chomp $line;
2904                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2905                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2906                 my ($creator, $epoch, $tz) =
2907                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2908                 $ref_item{'fullname'} = $name;
2909                 $name =~ s!^refs/tags/!!;
2910
2911                 $ref_item{'type'} = $type;
2912                 $ref_item{'id'} = $id;
2913                 $ref_item{'name'} = $name;
2914                 if ($type eq "tag") {
2915                         $ref_item{'subject'} = $title;
2916                         $ref_item{'reftype'} = $reftype;
2917                         $ref_item{'refid'}   = $refid;
2918                 } else {
2919                         $ref_item{'reftype'} = $type;
2920                         $ref_item{'refid'}   = $id;
2921                 }
2922
2923                 if ($type eq "tag" || $type eq "commit") {
2924                         $ref_item{'epoch'} = $epoch;
2925                         if ($epoch) {
2926                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2927                         } else {
2928                                 $ref_item{'age'} = "unknown";
2929                         }
2930                 }
2931
2932                 push @tagslist, \%ref_item;
2933         }
2934         close $fd;
2935
2936         return wantarray ? @tagslist : \@tagslist;
2937 }
2938
2939 ## ----------------------------------------------------------------------
2940 ## filesystem-related functions
2941
2942 sub get_file_owner {
2943         my $path = shift;
2944
2945         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2946         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2947         if (!defined $gcos) {
2948                 return undef;
2949         }
2950         my $owner = $gcos;
2951         $owner =~ s/[,;].*$//;
2952         return to_utf8($owner);
2953 }
2954
2955 # assume that file exists
2956 sub insert_file {
2957         my $filename = shift;
2958
2959         open my $fd, '<', $filename;
2960         print map { to_utf8($_) } <$fd>;
2961         close $fd;
2962 }
2963
2964 ## ......................................................................
2965 ## mimetype related functions
2966
2967 sub mimetype_guess_file {
2968         my $filename = shift;
2969         my $mimemap = shift;
2970         -r $mimemap or return undef;
2971
2972         my %mimemap;
2973         open(my $mh, '<', $mimemap) or return undef;
2974         while (<$mh>) {
2975                 next if m/^#/; # skip comments
2976                 my ($mimetype, $exts) = split(/\t+/);
2977                 if (defined $exts) {
2978                         my @exts = split(/\s+/, $exts);
2979                         foreach my $ext (@exts) {
2980                                 $mimemap{$ext} = $mimetype;
2981                         }
2982                 }
2983         }
2984         close($mh);
2985
2986         $filename =~ /\.([^.]*)$/;
2987         return $mimemap{$1};
2988 }
2989
2990 sub mimetype_guess {
2991         my $filename = shift;
2992         my $mime;
2993         $filename =~ /\./ or return undef;
2994
2995         if ($mimetypes_file) {
2996                 my $file = $mimetypes_file;
2997                 if ($file !~ m!^/!) { # if it is relative path
2998                         # it is relative to project
2999                         $file = "$projectroot/$project/$file";
3000                 }
3001                 $mime = mimetype_guess_file($filename, $file);
3002         }
3003         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3004         return $mime;
3005 }
3006
3007 sub blob_mimetype {
3008         my $fd = shift;
3009         my $filename = shift;
3010
3011         if ($filename) {
3012                 my $mime = mimetype_guess($filename);
3013                 $mime and return $mime;
3014         }
3015
3016         # just in case
3017         return $default_blob_plain_mimetype unless $fd;
3018
3019         if (-T $fd) {
3020                 return 'text/plain';
3021         } elsif (! $filename) {
3022                 return 'application/octet-stream';
3023         } elsif ($filename =~ m/\.png$/i) {
3024                 return 'image/png';
3025         } elsif ($filename =~ m/\.gif$/i) {
3026                 return 'image/gif';
3027         } elsif ($filename =~ m/\.jpe?g$/i) {
3028                 return 'image/jpeg';
3029         } else {
3030                 return 'application/octet-stream';
3031         }
3032 }
3033
3034 sub blob_contenttype {
3035         my ($fd, $file_name, $type) = @_;
3036
3037         $type ||= blob_mimetype($fd, $file_name);
3038         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3039                 $type .= "; charset=$default_text_plain_charset";
3040         }
3041
3042         return $type;
3043 }
3044
3045 ## ======================================================================
3046 ## functions printing HTML: header, footer, error page
3047
3048 sub git_header_html {
3049         my $status = shift || "200 OK";
3050         my $expires = shift;
3051
3052         my $title = "$site_name";
3053         if (defined $project) {
3054                 $title .= " - " . to_utf8($project);
3055                 if (defined $action) {
3056                         $title .= "/$action";
3057                         if (defined $file_name) {
3058                                 $title .= " - " . esc_path($file_name);
3059                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3060                                         $title .= "/";
3061                                 }
3062                         }
3063                 }
3064         }
3065         my $content_type;
3066         # require explicit support from the UA if we are to send the page as
3067         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3068         # we have to do this because MSIE sometimes globs '*/*', pretending to
3069         # support xhtml+xml but choking when it gets what it asked for.
3070         if (defined $cgi->http('HTTP_ACCEPT') &&
3071             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3072             $cgi->Accept('application/xhtml+xml') != 0) {
3073                 $content_type = 'application/xhtml+xml';
3074         } else {
3075                 $content_type = 'text/html';
3076         }
3077         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3078                            -status=> $status, -expires => $expires);
3079         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3080         print <<EOF;
3081 <?xml version="1.0" encoding="utf-8"?>
3082 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3083 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3084 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3085 <!-- git core binaries version $git_version -->
3086 <head>
3087 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3088 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3089 <meta name="robots" content="index, nofollow"/>
3090 <title>$title</title>
3091 EOF
3092         # the stylesheet, favicon etc urls won't work correctly with path_info
3093         # unless we set the appropriate base URL
3094         if ($ENV{'PATH_INFO'}) {
3095                 print "<base href=\"".esc_url($base_url)."\" />\n";
3096         }
3097         # print out each stylesheet that exist, providing backwards capability
3098         # for those people who defined $stylesheet in a config file
3099         if (defined $stylesheet) {
3100                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3101         } else {
3102                 foreach my $stylesheet (@stylesheets) {
3103                         next unless $stylesheet;
3104                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3105                 }
3106         }
3107         if (defined $project) {
3108                 my %href_params = get_feed_info();
3109                 if (!exists $href_params{'-title'}) {
3110                         $href_params{'-title'} = 'log';
3111                 }
3112
3113                 foreach my $format qw(RSS Atom) {
3114                         my $type = lc($format);
3115                         my %link_attr = (
3116                                 '-rel' => 'alternate',
3117                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3118                                 '-type' => "application/$type+xml"
3119                         );
3120
3121                         $href_params{'action'} = $type;
3122                         $link_attr{'-href'} = href(%href_params);
3123                         print "<link ".
3124                               "rel=\"$link_attr{'-rel'}\" ".
3125                               "title=\"$link_attr{'-title'}\" ".
3126                               "href=\"$link_attr{'-href'}\" ".
3127                               "type=\"$link_attr{'-type'}\" ".
3128                               "/>\n";
3129
3130                         $href_params{'extra_options'} = '--no-merges';
3131                         $link_attr{'-href'} = href(%href_params);
3132                         $link_attr{'-title'} .= ' (no merges)';
3133                         print "<link ".
3134                               "rel=\"$link_attr{'-rel'}\" ".
3135                               "title=\"$link_attr{'-title'}\" ".
3136                               "href=\"$link_attr{'-href'}\" ".
3137                               "type=\"$link_attr{'-type'}\" ".
3138                               "/>\n";
3139                 }
3140
3141         } else {
3142                 printf('<link rel="alternate" title="%s projects list" '.
3143                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3144                        $site_name, href(project=>undef, action=>"project_index"));
3145                 printf('<link rel="alternate" title="%s projects feeds" '.
3146                        'href="%s" type="text/x-opml" />'."\n",
3147                        $site_name, href(project=>undef, action=>"opml"));
3148         }
3149         if (defined $favicon) {
3150                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3151         }
3152
3153         print "</head>\n" .
3154               "<body>\n";
3155
3156         if (-f $site_header) {
3157                 insert_file($site_header);
3158         }
3159
3160         print "<div class=\"page_header\">\n" .
3161               $cgi->a({-href => esc_url($logo_url),
3162                        -title => $logo_label},
3163                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3164         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3165         if (defined $project) {
3166                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3167                 if (defined $action) {
3168                         print " / $action";
3169                 }
3170                 print "\n";
3171         }
3172         print "</div>\n";
3173
3174         my $have_search = gitweb_check_feature('search');
3175         if (defined $project && $have_search) {
3176                 if (!defined $searchtext) {
3177                         $searchtext = "";
3178                 }
3179                 my $search_hash;
3180                 if (defined $hash_base) {
3181                         $search_hash = $hash_base;
3182                 } elsif (defined $hash) {
3183                         $search_hash = $hash;
3184                 } else {
3185                         $search_hash = "HEAD";
3186                 }
3187                 my $action = $my_uri;
3188                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3189                 if ($use_pathinfo) {
3190                         $action .= "/".esc_url($project);
3191                 }
3192                 print $cgi->startform(-method => "get", -action => $action) .
3193                       "<div class=\"search\">\n" .
3194                       (!$use_pathinfo &&
3195                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3196                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3197                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3198                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3199                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3200                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3201                       " search:\n",
3202                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3203                       "<span title=\"Extended regular expression\">" .
3204                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3205                                      -checked => $search_use_regexp) .
3206                       "</span>" .
3207                       "</div>" .
3208                       $cgi->end_form() . "\n";
3209         }
3210 }
3211
3212 sub git_footer_html {
3213         my $feed_class = 'rss_logo';
3214
3215         print "<div class=\"page_footer\">\n";
3216         if (defined $project) {
3217                 my $descr = git_get_project_description($project);
3218                 if (defined $descr) {
3219                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3220                 }
3221
3222                 my %href_params = get_feed_info();
3223                 if (!%href_params) {
3224                         $feed_class .= ' generic';
3225                 }
3226                 $href_params{'-title'} ||= 'log';
3227
3228                 foreach my $format qw(RSS Atom) {
3229                         $href_params{'action'} = lc($format);
3230                         print $cgi->a({-href => href(%href_params),
3231                                       -title => "$href_params{'-title'} $format feed",
3232                                       -class => $feed_class}, $format)."\n";
3233                 }
3234
3235         } else {
3236                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3237                               -class => $feed_class}, "OPML") . " ";
3238                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3239                               -class => $feed_class}, "TXT") . "\n";
3240         }
3241         print "</div>\n"; # class="page_footer"
3242
3243         if (defined $t0 && gitweb_check_feature('timed')) {
3244                 print "<div id=\"generating_info\">\n";
3245                 print 'This page took '.
3246                       '<span id="generating_time" class="time_span">'.
3247                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3248                       ' seconds </span>'.
3249                       ' and '.
3250                       '<span id="generating_cmd">'.
3251                       $number_of_git_cmds.
3252                       '</span> git commands '.
3253                       " to generate.\n";
3254                 print "</div>\n"; # class="page_footer"
3255         }
3256
3257         if (-f $site_footer) {
3258                 insert_file($site_footer);
3259         }
3260
3261         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3262         if ($action eq 'blame_incremental') {
3263                 print qq!<script type="text/javascript">\n!.
3264                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3265                       qq!           "!. href() .qq!");\n!.
3266                       qq!</script>\n!;
3267         } else {
3268                 print qq!<script type="text/javascript">\n!.
3269                       qq!window.onload = fixLinks;\n!.
3270                       qq!</script>\n!;
3271         }
3272
3273         print "</body>\n" .
3274               "</html>";
3275 }
3276
3277 # die_error(<http_status_code>, <error_message>)
3278 # Example: die_error(404, 'Hash not found')
3279 # By convention, use the following status codes (as defined in RFC 2616):
3280 # 400: Invalid or missing CGI parameters, or
3281 #      requested object exists but has wrong type.
3282 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3283 #      this server or project.
3284 # 404: Requested object/revision/project doesn't exist.
3285 # 500: The server isn't configured properly, or
3286 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3287 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3288 sub die_error {
3289         my $status = shift || 500;
3290         my $error = shift || "Internal server error";
3291
3292         my %http_responses = (400 => '400 Bad Request',
3293                               403 => '403 Forbidden',
3294                               404 => '404 Not Found',
3295                               500 => '500 Internal Server Error');
3296         git_header_html($http_responses{$status});
3297         print <<EOF;
3298 <div class="page_body">
3299 <br /><br />
3300 $status - $error
3301 <br />
3302 </div>
3303 EOF
3304         git_footer_html();
3305         exit;
3306 }
3307
3308 ## ----------------------------------------------------------------------
3309 ## functions printing or outputting HTML: navigation
3310
3311 sub git_print_page_nav {
3312         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3313         $extra = '' if !defined $extra; # pager or formats
3314
3315         my @navs = qw(summary shortlog log commit commitdiff tree);
3316         if ($suppress) {
3317                 @navs = grep { $_ ne $suppress } @navs;
3318         }
3319
3320         my %arg = map { $_ => {action=>$_} } @navs;
3321         if (defined $head) {
3322                 for (qw(commit commitdiff)) {
3323                         $arg{$_}{'hash'} = $head;
3324                 }
3325                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3326                         for (qw(shortlog log)) {
3327                                 $arg{$_}{'hash'} = $head;
3328                         }
3329                 }
3330         }
3331
3332         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3333         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3334
3335         my @actions = gitweb_get_feature('actions');
3336         my %repl = (
3337                 '%' => '%',
3338                 'n' => $project,         # project name
3339                 'f' => $git_dir,         # project path within filesystem
3340                 'h' => $treehead || '',  # current hash ('h' parameter)
3341                 'b' => $treebase || '',  # hash base ('hb' parameter)
3342         );
3343         while (@actions) {
3344                 my ($label, $link, $pos) = splice(@actions,0,3);
3345                 # insert
3346                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3347                 # munch munch
3348                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3349                 $arg{$label}{'_href'} = $link;
3350         }
3351
3352         print "<div class=\"page_nav\">\n" .
3353                 (join " | ",
3354                  map { $_ eq $current ?
3355                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3356                  } @navs);
3357         print "<br/>\n$extra<br/>\n" .
3358               "</div>\n";
3359 }
3360
3361 sub format_paging_nav {
3362         my ($action, $hash, $head, $page, $has_next_link) = @_;
3363         my $paging_nav;
3364
3365
3366         if ($hash ne $head || $page) {
3367                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3368         } else {
3369                 $paging_nav .= "HEAD";
3370         }
3371
3372         if ($page > 0) {
3373                 $paging_nav .= " &sdot; " .
3374                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3375                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3376         } else {
3377                 $paging_nav .= " &sdot; prev";
3378         }
3379
3380         if ($has_next_link) {
3381                 $paging_nav .= " &sdot; " .
3382                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3383                                  -accesskey => "n", -title => "Alt-n"}, "next");
3384         } else {
3385                 $paging_nav .= " &sdot; next";
3386         }
3387
3388         return $paging_nav;
3389 }
3390
3391 ## ......................................................................
3392 ## functions printing or outputting HTML: div
3393
3394 sub git_print_header_div {
3395         my ($action, $title, $hash, $hash_base) = @_;
3396         my %args = ();
3397
3398         $args{'action'} = $action;
3399         $args{'hash'} = $hash if $hash;
3400         $args{'hash_base'} = $hash_base if $hash_base;
3401
3402         print "<div class=\"header\">\n" .
3403               $cgi->a({-href => href(%args), -class => "title"},
3404               $title ? $title : $action) .
3405               "\n</div>\n";
3406 }
3407
3408 sub print_local_time {
3409         my %date = @_;
3410         if ($date{'hour_local'} < 6) {
3411                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3412                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3413         } else {
3414                 printf(" (%02d:%02d %s)",
3415                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3416         }
3417 }
3418
3419 # Outputs the author name and date in long form
3420 sub git_print_authorship {
3421         my $co = shift;
3422         my %opts = @_;
3423         my $tag = $opts{-tag} || 'div';
3424
3425         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3426         print "<$tag class=\"author_date\">" .
3427               esc_html($co->{'author_name'}) .
3428               " [$ad{'rfc2822'}";
3429         print_local_time(%ad) if ($opts{-localtime});
3430         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3431                   . "</$tag>\n";
3432 }
3433
3434 # Outputs table rows containing the full author or committer information,
3435 # in the format expected for 'commit' view (& similia).
3436 # Parameters are a commit hash reference, followed by the list of people
3437 # to output information for. If the list is empty it defalts to both
3438 # author and committer.
3439 sub git_print_authorship_rows {
3440         my $co = shift;
3441         # too bad we can't use @people = @_ || ('author', 'committer')
3442         my @people = @_;
3443         @people = ('author', 'committer') unless @people;
3444         foreach my $who (@people) {
3445                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3446                 print "<tr><td>$who</td><td>" . esc_html($co->{$who}) . "</td>" .
3447                       "<td rowspan=\"2\">" .
3448                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3449                       "</td></tr>\n" .
3450                       "<tr>" .
3451                       "<td></td><td> $wd{'rfc2822'}";
3452                 print_local_time(%wd);
3453                 print "</td>" .
3454                       "</tr>\n";
3455         }
3456 }
3457
3458 sub git_print_page_path {
3459         my $name = shift;
3460         my $type = shift;
3461         my $hb = shift;
3462
3463
3464         print "<div class=\"page_path\">";
3465         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3466                       -title => 'tree root'}, to_utf8("[$project]"));
3467         print " / ";
3468         if (defined $name) {
3469                 my @dirname = split '/', $name;
3470                 my $basename = pop @dirname;
3471                 my $fullname = '';
3472
3473                 foreach my $dir (@dirname) {
3474                         $fullname .= ($fullname ? '/' : '') . $dir;
3475                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3476                                                      hash_base=>$hb),
3477                                       -title => $fullname}, esc_path($dir));
3478                         print " / ";
3479                 }
3480                 if (defined $type && $type eq 'blob') {
3481                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3482                                                      hash_base=>$hb),
3483                                       -title => $name}, esc_path($basename));
3484                 } elsif (defined $type && $type eq 'tree') {
3485                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3486                                                      hash_base=>$hb),
3487                                       -title => $name}, esc_path($basename));
3488                         print " / ";
3489                 } else {
3490                         print esc_path($basename);
3491                 }
3492         }
3493         print "<br/></div>\n";
3494 }
3495
3496 sub git_print_log {
3497         my $log = shift;
3498         my %opts = @_;
3499
3500         if ($opts{'-remove_title'}) {
3501                 # remove title, i.e. first line of log
3502                 shift @$log;
3503         }
3504         # remove leading empty lines
3505         while (defined $log->[0] && $log->[0] eq "") {
3506                 shift @$log;
3507         }
3508
3509         # print log
3510         my $signoff = 0;
3511         my $empty = 0;
3512         foreach my $line (@$log) {
3513                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3514                         $signoff = 1;
3515                         $empty = 0;
3516                         if (! $opts{'-remove_signoff'}) {
3517                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3518                                 next;
3519                         } else {
3520                                 # remove signoff lines
3521                                 next;
3522                         }
3523                 } else {
3524                         $signoff = 0;
3525                 }
3526
3527                 # print only one empty line
3528                 # do not print empty line after signoff
3529                 if ($line eq "") {
3530                         next if ($empty || $signoff);
3531                         $empty = 1;
3532                 } else {
3533                         $empty = 0;
3534                 }
3535
3536                 print format_log_line_html($line) . "<br/>\n";
3537         }
3538
3539         if ($opts{'-final_empty_line'}) {
3540                 # end with single empty line
3541                 print "<br/>\n" unless $empty;
3542         }
3543 }
3544
3545 # return link target (what link points to)
3546 sub git_get_link_target {
3547         my $hash = shift;
3548         my $link_target;
3549
3550         # read link
3551         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3552                 or return;
3553         {
3554                 local $/ = undef;
3555                 $link_target = <$fd>;
3556         }
3557         close $fd
3558                 or return;
3559
3560         return $link_target;
3561 }
3562
3563 # given link target, and the directory (basedir) the link is in,
3564 # return target of link relative to top directory (top tree);
3565 # return undef if it is not possible (including absolute links).
3566 sub normalize_link_target {
3567         my ($link_target, $basedir) = @_;
3568
3569         # absolute symlinks (beginning with '/') cannot be normalized
3570         return if (substr($link_target, 0, 1) eq '/');
3571
3572         # normalize link target to path from top (root) tree (dir)
3573         my $path;
3574         if ($basedir) {
3575                 $path = $basedir . '/' . $link_target;
3576         } else {
3577                 # we are in top (root) tree (dir)
3578                 $path = $link_target;
3579         }
3580
3581         # remove //, /./, and /../
3582         my @path_parts;
3583         foreach my $part (split('/', $path)) {
3584                 # discard '.' and ''
3585                 next if (!$part || $part eq '.');
3586                 # handle '..'
3587                 if ($part eq '..') {
3588                         if (@path_parts) {
3589                                 pop @path_parts;
3590                         } else {
3591                                 # link leads outside repository (outside top dir)
3592                                 return;
3593                         }
3594                 } else {
3595                         push @path_parts, $part;
3596                 }
3597         }
3598         $path = join('/', @path_parts);
3599
3600         return $path;
3601 }
3602
3603 # print tree entry (row of git_tree), but without encompassing <tr> element
3604 sub git_print_tree_entry {
3605         my ($t, $basedir, $hash_base, $have_blame) = @_;
3606
3607         my %base_key = ();
3608         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3609
3610         # The format of a table row is: mode list link.  Where mode is
3611         # the mode of the entry, list is the name of the entry, an href,
3612         # and link is the action links of the entry.
3613
3614         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3615         if ($t->{'type'} eq "blob") {
3616                 print "<td class=\"list\">" .
3617                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3618                                                file_name=>"$basedir$t->{'name'}", %base_key),
3619                                 -class => "list"}, esc_path($t->{'name'}));
3620                 if (S_ISLNK(oct $t->{'mode'})) {
3621                         my $link_target = git_get_link_target($t->{'hash'});
3622                         if ($link_target) {
3623                                 my $norm_target = normalize_link_target($link_target, $basedir);
3624                                 if (defined $norm_target) {
3625                                         print " -> " .
3626                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3627                                                                      file_name=>$norm_target),
3628                                                        -title => $norm_target}, esc_path($link_target));
3629                                 } else {
3630                                         print " -> " . esc_path($link_target);
3631                                 }
3632                         }
3633                 }
3634                 print "</td>\n";
3635                 print "<td class=\"link\">";
3636                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3637                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3638                               "blob");
3639                 if ($have_blame) {
3640                         print " | " .
3641                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3642                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3643                                       "blame");
3644                 }
3645                 if (defined $hash_base) {
3646                         print " | " .
3647                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3648                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3649                                       "history");
3650                 }
3651                 print " | " .
3652                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3653                                                file_name=>"$basedir$t->{'name'}")},
3654                                 "raw");
3655                 print "</td>\n";
3656
3657         } elsif ($t->{'type'} eq "tree") {
3658                 print "<td class=\"list\">";
3659                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3660                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3661                               esc_path($t->{'name'}));
3662                 print "</td>\n";
3663                 print "<td class=\"link\">";
3664                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3665                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3666                               "tree");
3667                 if (defined $hash_base) {
3668                         print " | " .
3669                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3670                                                      file_name=>"$basedir$t->{'name'}")},
3671                                       "history");
3672                 }
3673                 print "</td>\n";
3674         } else {
3675                 # unknown object: we can only present history for it
3676                 # (this includes 'commit' object, i.e. submodule support)
3677                 print "<td class=\"list\">" .
3678                       esc_path($t->{'name'}) .
3679                       "</td>\n";
3680                 print "<td class=\"link\">";
3681                 if (defined $hash_base) {
3682                         print $cgi->a({-href => href(action=>"history",
3683                                                      hash_base=>$hash_base,
3684                                                      file_name=>"$basedir$t->{'name'}")},
3685                                       "history");
3686                 }
3687                 print "</td>\n";
3688         }
3689 }
3690
3691 ## ......................................................................
3692 ## functions printing large fragments of HTML
3693
3694 # get pre-image filenames for merge (combined) diff
3695 sub fill_from_file_info {
3696         my ($diff, @parents) = @_;
3697
3698         $diff->{'from_file'} = [ ];
3699         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3700         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3701                 if ($diff->{'status'}[$i] eq 'R' ||
3702                     $diff->{'status'}[$i] eq 'C') {
3703                         $diff->{'from_file'}[$i] =
3704                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3705                 }
3706         }
3707
3708         return $diff;
3709 }
3710
3711 # is current raw difftree line of file deletion
3712 sub is_deleted {
3713         my $diffinfo = shift;
3714
3715         return $diffinfo->{'to_id'} eq ('0' x 40);
3716 }
3717
3718 # does patch correspond to [previous] difftree raw line
3719 # $diffinfo  - hashref of parsed raw diff format
3720 # $patchinfo - hashref of parsed patch diff format
3721 #              (the same keys as in $diffinfo)
3722 sub is_patch_split {
3723         my ($diffinfo, $patchinfo) = @_;
3724
3725         return defined $diffinfo && defined $patchinfo
3726                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3727 }
3728
3729
3730 sub git_difftree_body {
3731         my ($difftree, $hash, @parents) = @_;
3732         my ($parent) = $parents[0];
3733         my $have_blame = gitweb_check_feature('blame');
3734         print "<div class=\"list_head\">\n";
3735         if ($#{$difftree} > 10) {
3736                 print(($#{$difftree} + 1) . " files changed:\n");
3737         }
3738         print "</div>\n";
3739
3740         print "<table class=\"" .
3741               (@parents > 1 ? "combined " : "") .
3742               "diff_tree\">\n";
3743
3744         # header only for combined diff in 'commitdiff' view
3745         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3746         if ($has_header) {
3747                 # table header
3748                 print "<thead><tr>\n" .
3749                        "<th></th><th></th>\n"; # filename, patchN link
3750                 for (my $i = 0; $i < @parents; $i++) {
3751                         my $par = $parents[$i];
3752                         print "<th>" .
3753                               $cgi->a({-href => href(action=>"commitdiff",
3754                                                      hash=>$hash, hash_parent=>$par),
3755                                        -title => 'commitdiff to parent number ' .
3756                                                   ($i+1) . ': ' . substr($par,0,7)},
3757                                       $i+1) .
3758                               "&nbsp;</th>\n";
3759                 }
3760                 print "</tr></thead>\n<tbody>\n";
3761         }
3762
3763         my $alternate = 1;
3764         my $patchno = 0;
3765         foreach my $line (@{$difftree}) {
3766                 my $diff = parsed_difftree_line($line);
3767
3768                 if ($alternate) {
3769                         print "<tr class=\"dark\">\n";
3770                 } else {
3771                         print "<tr class=\"light\">\n";
3772                 }
3773                 $alternate ^= 1;
3774
3775                 if (exists $diff->{'nparents'}) { # combined diff
3776
3777                         fill_from_file_info($diff, @parents)
3778                                 unless exists $diff->{'from_file'};
3779
3780                         if (!is_deleted($diff)) {
3781                                 # file exists in the result (child) commit
3782                                 print "<td>" .
3783                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3784                                                              file_name=>$diff->{'to_file'},
3785                                                              hash_base=>$hash),
3786                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3787                                       "</td>\n";
3788                         } else {
3789                                 print "<td>" .
3790                                       esc_path($diff->{'to_file'}) .
3791                                       "</td>\n";
3792                         }
3793
3794                         if ($action eq 'commitdiff') {
3795                                 # link to patch
3796                                 $patchno++;
3797                                 print "<td class=\"link\">" .
3798                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3799                                       " | " .
3800                                       "</td>\n";
3801                         }
3802
3803                         my $has_history = 0;
3804                         my $not_deleted = 0;
3805                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3806                                 my $hash_parent = $parents[$i];
3807                                 my $from_hash = $diff->{'from_id'}[$i];
3808                                 my $from_path = $diff->{'from_file'}[$i];
3809                                 my $status = $diff->{'status'}[$i];
3810
3811                                 $has_history ||= ($status ne 'A');
3812                                 $not_deleted ||= ($status ne 'D');
3813
3814                                 if ($status eq 'A') {
3815                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3816                                 } elsif ($status eq 'D') {
3817                                         print "<td class=\"link\">" .
3818                                               $cgi->a({-href => href(action=>"blob",
3819                                                                      hash_base=>$hash,
3820                                                                      hash=>$from_hash,
3821                                                                      file_name=>$from_path)},
3822                                                       "blob" . ($i+1)) .
3823                                               " | </td>\n";
3824                                 } else {
3825                                         if ($diff->{'to_id'} eq $from_hash) {
3826                                                 print "<td class=\"link nochange\">";
3827                                         } else {
3828                                                 print "<td class=\"link\">";
3829                                         }
3830                                         print $cgi->a({-href => href(action=>"blobdiff",
3831                                                                      hash=>$diff->{'to_id'},
3832                                                                      hash_parent=>$from_hash,
3833                                                                      hash_base=>$hash,
3834                                                                      hash_parent_base=>$hash_parent,
3835                                                                      file_name=>$diff->{'to_file'},
3836                                                                      file_parent=>$from_path)},
3837                                                       "diff" . ($i+1)) .
3838                                               " | </td>\n";
3839                                 }
3840                         }
3841
3842                         print "<td class=\"link\">";
3843                         if ($not_deleted) {
3844                                 print $cgi->a({-href => href(action=>"blob",
3845                                                              hash=>$diff->{'to_id'},
3846                                                              file_name=>$diff->{'to_file'},
3847                                                              hash_base=>$hash)},
3848                                               "blob");
3849                                 print " | " if ($has_history);
3850                         }
3851                         if ($has_history) {
3852                                 print $cgi->a({-href => href(action=>"history",
3853                                                              file_name=>$diff->{'to_file'},
3854                                                              hash_base=>$hash)},
3855                                               "history");
3856                         }
3857                         print "</td>\n";
3858
3859                         print "</tr>\n";
3860                         next; # instead of 'else' clause, to avoid extra indent
3861                 }
3862                 # else ordinary diff
3863
3864                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3865                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3866                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3867                         $to_mode_oct = oct $diff->{'to_mode'};
3868                         if (S_ISREG($to_mode_oct)) { # only for regular file
3869                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3870                         }
3871                         $to_file_type = file_type($diff->{'to_mode'});
3872                 }
3873                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3874                         $from_mode_oct = oct $diff->{'from_mode'};
3875                         if (S_ISREG($to_mode_oct)) { # only for regular file
3876                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3877                         }
3878                         $from_file_type = file_type($diff->{'from_mode'});
3879                 }
3880
3881                 if ($diff->{'status'} eq "A") { # created
3882                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3883                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3884                         $mode_chng   .= "]</span>";
3885                         print "<td>";
3886                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3887                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3888                                       -class => "list"}, esc_path($diff->{'file'}));
3889                         print "</td>\n";
3890                         print "<td>$mode_chng</td>\n";
3891                         print "<td class=\"link\">";
3892                         if ($action eq 'commitdiff') {
3893                                 # link to patch
3894                                 $patchno++;
3895                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3896                                 print " | ";
3897                         }
3898                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3899                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3900                                       "blob");
3901                         print "</td>\n";
3902
3903                 } elsif ($diff->{'status'} eq "D") { # deleted
3904                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3905                         print "<td>";
3906                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3907                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3908                                        -class => "list"}, esc_path($diff->{'file'}));
3909                         print "</td>\n";
3910                         print "<td>$mode_chng</td>\n";
3911                         print "<td class=\"link\">";
3912                         if ($action eq 'commitdiff') {
3913                                 # link to patch
3914                                 $patchno++;
3915                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3916                                 print " | ";
3917                         }
3918                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3919                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3920                                       "blob") . " | ";
3921                         if ($have_blame) {
3922                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3923                                                              file_name=>$diff->{'file'})},
3924                                               "blame") . " | ";
3925                         }
3926                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3927                                                      file_name=>$diff->{'file'})},
3928                                       "history");
3929                         print "</td>\n";
3930
3931                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3932                         my $mode_chnge = "";
3933                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3934                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3935                                 if ($from_file_type ne $to_file_type) {
3936                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3937                                 }
3938                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3939                                         if ($from_mode_str && $to_mode_str) {
3940                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3941                                         } elsif ($to_mode_str) {
3942                                                 $mode_chnge .= " mode: $to_mode_str";
3943                                         }
3944                                 }
3945                                 $mode_chnge .= "]</span>\n";
3946                         }
3947                         print "<td>";
3948                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3949                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3950                                       -class => "list"}, esc_path($diff->{'file'}));
3951                         print "</td>\n";
3952                         print "<td>$mode_chnge</td>\n";
3953                         print "<td class=\"link\">";
3954                         if ($action eq 'commitdiff') {
3955                                 # link to patch
3956                                 $patchno++;
3957                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3958                                       " | ";
3959                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3960                                 # "commit" view and modified file (not onlu mode changed)
3961                                 print $cgi->a({-href => href(action=>"blobdiff",
3962                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3963                                                              hash_base=>$hash, hash_parent_base=>$parent,
3964                                                              file_name=>$diff->{'file'})},
3965                                               "diff") .
3966                                       " | ";
3967                         }
3968                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3969                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3970                                        "blob") . " | ";
3971                         if ($have_blame) {
3972                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3973                                                              file_name=>$diff->{'file'})},
3974                                               "blame") . " | ";
3975                         }
3976                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3977                                                      file_name=>$diff->{'file'})},
3978                                       "history");
3979                         print "</td>\n";
3980
3981                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3982                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3983                         my $nstatus = $status_name{$diff->{'status'}};
3984                         my $mode_chng = "";
3985                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3986                                 # mode also for directories, so we cannot use $to_mode_str
3987                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3988                         }
3989                         print "<td>" .
3990                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3991                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3992                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3993                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3994                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3995                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3996                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3997                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3998                               "<td class=\"link\">";
3999                         if ($action eq 'commitdiff') {
4000                                 # link to patch
4001                                 $patchno++;
4002                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4003                                       " | ";
4004                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4005                                 # "commit" view and modified file (not only pure rename or copy)
4006                                 print $cgi->a({-href => href(action=>"blobdiff",
4007                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4008                                                              hash_base=>$hash, hash_parent_base=>$parent,
4009                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4010                                               "diff") .
4011                                       " | ";
4012                         }
4013                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4014                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4015                                       "blob") . " | ";
4016                         if ($have_blame) {
4017                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4018                                                              file_name=>$diff->{'to_file'})},
4019                                               "blame") . " | ";
4020                         }
4021                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4022                                                     file_name=>$diff->{'to_file'})},
4023                                       "history");
4024                         print "</td>\n";
4025
4026                 } # we should not encounter Unmerged (U) or Unknown (X) status
4027                 print "</tr>\n";
4028         }
4029         print "</tbody>" if $has_header;
4030         print "</table>\n";
4031 }
4032
4033 sub git_patchset_body {
4034         my ($fd, $difftree, $hash, @hash_parents) = @_;
4035         my ($hash_parent) = $hash_parents[0];
4036
4037         my $is_combined = (@hash_parents > 1);
4038         my $patch_idx = 0;
4039         my $patch_number = 0;
4040         my $patch_line;
4041         my $diffinfo;
4042         my $to_name;
4043         my (%from, %to);
4044
4045         print "<div class=\"patchset\">\n";
4046
4047         # skip to first patch
4048         while ($patch_line = <$fd>) {
4049                 chomp $patch_line;
4050
4051                 last if ($patch_line =~ m/^diff /);
4052         }
4053
4054  PATCH:
4055         while ($patch_line) {
4056
4057                 # parse "git diff" header line
4058                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4059                         # $1 is from_name, which we do not use
4060                         $to_name = unquote($2);
4061                         $to_name =~ s!^b/!!;
4062                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4063                         # $1 is 'cc' or 'combined', which we do not use
4064                         $to_name = unquote($2);
4065                 } else {
4066                         $to_name = undef;
4067                 }
4068
4069                 # check if current patch belong to current raw line
4070                 # and parse raw git-diff line if needed
4071                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4072                         # this is continuation of a split patch
4073                         print "<div class=\"patch cont\">\n";
4074                 } else {
4075                         # advance raw git-diff output if needed
4076                         $patch_idx++ if defined $diffinfo;
4077
4078                         # read and prepare patch information
4079                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4080
4081                         # compact combined diff output can have some patches skipped
4082                         # find which patch (using pathname of result) we are at now;
4083                         if ($is_combined) {
4084                                 while ($to_name ne $diffinfo->{'to_file'}) {
4085                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4086                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4087                                               "</div>\n";  # class="patch"
4088
4089                                         $patch_idx++;
4090                                         $patch_number++;
4091
4092                                         last if $patch_idx > $#$difftree;
4093                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4094                                 }
4095                         }
4096
4097                         # modifies %from, %to hashes
4098                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4099
4100                         # this is first patch for raw difftree line with $patch_idx index
4101                         # we index @$difftree array from 0, but number patches from 1
4102                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4103                 }
4104
4105                 # git diff header
4106                 #assert($patch_line =~ m/^diff /) if DEBUG;
4107                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4108                 $patch_number++;
4109                 # print "git diff" header
4110                 print format_git_diff_header_line($patch_line, $diffinfo,
4111                                                   \%from, \%to);
4112
4113                 # print extended diff header
4114                 print "<div class=\"diff extended_header\">\n";
4115         EXTENDED_HEADER:
4116                 while ($patch_line = <$fd>) {
4117                         chomp $patch_line;
4118
4119                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4120
4121                         print format_extended_diff_header_line($patch_line, $diffinfo,
4122                                                                \%from, \%to);
4123                 }
4124                 print "</div>\n"; # class="diff extended_header"
4125
4126                 # from-file/to-file diff header
4127                 if (! $patch_line) {
4128                         print "</div>\n"; # class="patch"
4129                         last PATCH;
4130                 }
4131                 next PATCH if ($patch_line =~ m/^diff /);
4132                 #assert($patch_line =~ m/^---/) if DEBUG;
4133
4134                 my $last_patch_line = $patch_line;
4135                 $patch_line = <$fd>;
4136                 chomp $patch_line;
4137                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4138
4139                 print format_diff_from_to_header($last_patch_line, $patch_line,
4140                                                  $diffinfo, \%from, \%to,
4141                                                  @hash_parents);
4142
4143                 # the patch itself
4144         LINE:
4145                 while ($patch_line = <$fd>) {
4146                         chomp $patch_line;
4147
4148                         next PATCH if ($patch_line =~ m/^diff /);
4149
4150                         print format_diff_line($patch_line, \%from, \%to);
4151                 }
4152
4153         } continue {
4154                 print "</div>\n"; # class="patch"
4155         }
4156
4157         # for compact combined (--cc) format, with chunk and patch simpliciaction
4158         # patchset might be empty, but there might be unprocessed raw lines
4159         for (++$patch_idx if $patch_number > 0;
4160              $patch_idx < @$difftree;
4161              ++$patch_idx) {
4162                 # read and prepare patch information
4163                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4164
4165                 # generate anchor for "patch" links in difftree / whatchanged part
4166                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4167                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4168                       "</div>\n";  # class="patch"
4169
4170                 $patch_number++;
4171         }
4172
4173         if ($patch_number == 0) {
4174                 if (@hash_parents > 1) {
4175                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4176                 } else {
4177                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4178                 }
4179         }
4180
4181         print "</div>\n"; # class="patchset"
4182 }
4183
4184 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4185
4186 # fills project list info (age, description, owner, forks) for each
4187 # project in the list, removing invalid projects from returned list
4188 # NOTE: modifies $projlist, but does not remove entries from it
4189 sub fill_project_list_info {
4190         my ($projlist, $check_forks) = @_;
4191         my @projects;
4192
4193         my $show_ctags = gitweb_check_feature('ctags');
4194  PROJECT:
4195         foreach my $pr (@$projlist) {
4196                 my (@activity) = git_get_last_activity($pr->{'path'});
4197                 unless (@activity) {
4198                         next PROJECT;
4199                 }
4200                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4201                 if (!defined $pr->{'descr'}) {
4202                         my $descr = git_get_project_description($pr->{'path'}) || "";
4203                         $descr = to_utf8($descr);
4204                         $pr->{'descr_long'} = $descr;
4205                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4206                 }
4207                 if (!defined $pr->{'owner'}) {
4208                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4209                 }
4210                 if ($check_forks) {
4211                         my $pname = $pr->{'path'};
4212                         if (($pname =~ s/\.git$//) &&
4213                             ($pname !~ /\/$/) &&
4214                             (-d "$projectroot/$pname")) {
4215                                 $pr->{'forks'} = "-d $projectroot/$pname";
4216                         } else {
4217                                 $pr->{'forks'} = 0;
4218                         }
4219                 }
4220                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4221                 push @projects, $pr;
4222         }
4223
4224         return @projects;
4225 }
4226
4227 # print 'sort by' <th> element, generating 'sort by $name' replay link
4228 # if that order is not selected
4229 sub print_sort_th {
4230         my ($name, $order, $header) = @_;
4231         $header ||= ucfirst($name);
4232
4233         if ($order eq $name) {
4234                 print "<th>$header</th>\n";
4235         } else {
4236                 print "<th>" .
4237                       $cgi->a({-href => href(-replay=>1, order=>$name),
4238                                -class => "header"}, $header) .
4239                       "</th>\n";
4240         }
4241 }
4242
4243 sub git_project_list_body {
4244         # actually uses global variable $project
4245         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4246
4247         my $check_forks = gitweb_check_feature('forks');
4248         my @projects = fill_project_list_info($projlist, $check_forks);
4249
4250         $order ||= $default_projects_order;
4251         $from = 0 unless defined $from;
4252         $to = $#projects if (!defined $to || $#projects < $to);
4253
4254         my %order_info = (
4255                 project => { key => 'path', type => 'str' },
4256                 descr => { key => 'descr_long', type => 'str' },
4257                 owner => { key => 'owner', type => 'str' },
4258                 age => { key => 'age', type => 'num' }
4259         );
4260         my $oi = $order_info{$order};
4261         if ($oi->{'type'} eq 'str') {
4262                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4263         } else {
4264                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4265         }
4266
4267         my $show_ctags = gitweb_check_feature('ctags');
4268         if ($show_ctags) {
4269                 my %ctags;
4270                 foreach my $p (@projects) {
4271                         foreach my $ct (keys %{$p->{'ctags'}}) {
4272                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4273                         }
4274                 }
4275                 my $cloud = git_populate_project_tagcloud(\%ctags);
4276                 print git_show_project_tagcloud($cloud, 64);
4277         }
4278
4279         print "<table class=\"project_list\">\n";
4280         unless ($no_header) {
4281                 print "<tr>\n";
4282                 if ($check_forks) {
4283                         print "<th></th>\n";
4284                 }
4285                 print_sort_th('project', $order, 'Project');
4286                 print_sort_th('descr', $order, 'Description');
4287                 print_sort_th('owner', $order, 'Owner');
4288                 print_sort_th('age', $order, 'Last Change');
4289                 print "<th></th>\n" . # for links
4290                       "</tr>\n";
4291         }
4292         my $alternate = 1;
4293         my $tagfilter = $cgi->param('by_tag');
4294         for (my $i = $from; $i <= $to; $i++) {
4295                 my $pr = $projects[$i];
4296
4297                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4298                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4299                         and not $pr->{'descr_long'} =~ /$searchtext/;
4300                 # Weed out forks or non-matching entries of search
4301                 if ($check_forks) {
4302                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4303                         $forkbase="^$forkbase" if $forkbase;
4304                         next if not $searchtext and not $tagfilter and $show_ctags
4305                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4306                 }
4307
4308                 if ($alternate) {
4309                         print "<tr class=\"dark\">\n";
4310                 } else {
4311                         print "<tr class=\"light\">\n";
4312                 }
4313                 $alternate ^= 1;
4314                 if ($check_forks) {
4315                         print "<td>";
4316                         if ($pr->{'forks'}) {
4317                                 print "<!-- $pr->{'forks'} -->\n";
4318                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4319                         }
4320                         print "</td>\n";
4321                 }
4322                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4323                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4324                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4325                                         -class => "list", -title => $pr->{'descr_long'}},
4326                                         esc_html($pr->{'descr'})) . "</td>\n" .
4327                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4328                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4329                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4330                       "<td class=\"link\">" .
4331                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4332                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4333                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4334                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4335                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4336                       "</td>\n" .
4337                       "</tr>\n";
4338         }
4339         if (defined $extra) {
4340                 print "<tr>\n";
4341                 if ($check_forks) {
4342                         print "<td></td>\n";
4343                 }
4344                 print "<td colspan=\"5\">$extra</td>\n" .
4345                       "</tr>\n";
4346         }
4347         print "</table>\n";
4348 }
4349
4350 sub git_shortlog_body {
4351         # uses global variable $project
4352         my ($commitlist, $from, $to, $refs, $extra) = @_;
4353
4354         $from = 0 unless defined $from;
4355         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4356
4357         print "<table class=\"shortlog\">\n";
4358         my $alternate = 1;
4359         for (my $i = $from; $i <= $to; $i++) {
4360                 my %co = %{$commitlist->[$i]};
4361                 my $commit = $co{'id'};
4362                 my $ref = format_ref_marker($refs, $commit);
4363                 if ($alternate) {
4364                         print "<tr class=\"dark\">\n";
4365                 } else {
4366                         print "<tr class=\"light\">\n";
4367                 }
4368                 $alternate ^= 1;
4369                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4370                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4371                       format_author_html('td', \%co, 10) . "<td>";
4372                 print format_subject_html($co{'title'}, $co{'title_short'},
4373                                           href(action=>"commit", hash=>$commit), $ref);
4374                 print "</td>\n" .
4375                       "<td class=\"link\">" .
4376                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4377                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4378                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4379                 my $snapshot_links = format_snapshot_links($commit);
4380                 if (defined $snapshot_links) {
4381                         print " | " . $snapshot_links;
4382                 }
4383                 print "</td>\n" .
4384                       "</tr>\n";
4385         }
4386         if (defined $extra) {
4387                 print "<tr>\n" .
4388                       "<td colspan=\"4\">$extra</td>\n" .
4389                       "</tr>\n";
4390         }
4391         print "</table>\n";
4392 }
4393
4394 sub git_history_body {
4395         # Warning: assumes constant type (blob or tree) during history
4396         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4397
4398         $from = 0 unless defined $from;
4399         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4400
4401         print "<table class=\"history\">\n";
4402         my $alternate = 1;
4403         for (my $i = $from; $i <= $to; $i++) {
4404                 my %co = %{$commitlist->[$i]};
4405                 if (!%co) {
4406                         next;
4407                 }
4408                 my $commit = $co{'id'};
4409
4410                 my $ref = format_ref_marker($refs, $commit);
4411
4412                 if ($alternate) {
4413                         print "<tr class=\"dark\">\n";
4414                 } else {
4415                         print "<tr class=\"light\">\n";
4416                 }
4417                 $alternate ^= 1;
4418                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4419         # shortlog:   format_author_html('td', \%co, 10)
4420                       format_author_html('td', \%co, 15, 3) . "<td>";
4421                 # originally git_history used chop_str($co{'title'}, 50)
4422                 print format_subject_html($co{'title'}, $co{'title_short'},
4423                                           href(action=>"commit", hash=>$commit), $ref);
4424                 print "</td>\n" .
4425                       "<td class=\"link\">" .
4426                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4427                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4428
4429                 if ($ftype eq 'blob') {
4430                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4431                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4432                         if (defined $blob_current && defined $blob_parent &&
4433                                         $blob_current ne $blob_parent) {
4434                                 print " | " .
4435                                         $cgi->a({-href => href(action=>"blobdiff",
4436                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4437                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4438                                                                file_name=>$file_name)},
4439                                                 "diff to current");
4440                         }
4441                 }
4442                 print "</td>\n" .
4443                       "</tr>\n";
4444         }
4445         if (defined $extra) {
4446                 print "<tr>\n" .
4447                       "<td colspan=\"4\">$extra</td>\n" .
4448                       "</tr>\n";
4449         }
4450         print "</table>\n";
4451 }
4452
4453 sub git_tags_body {
4454         # uses global variable $project
4455         my ($taglist, $from, $to, $extra) = @_;
4456         $from = 0 unless defined $from;
4457         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4458
4459         print "<table class=\"tags\">\n";
4460         my $alternate = 1;
4461         for (my $i = $from; $i <= $to; $i++) {
4462                 my $entry = $taglist->[$i];
4463                 my %tag = %$entry;
4464                 my $comment = $tag{'subject'};
4465                 my $comment_short;
4466                 if (defined $comment) {
4467                         $comment_short = chop_str($comment, 30, 5);
4468                 }
4469                 if ($alternate) {
4470                         print "<tr class=\"dark\">\n";
4471                 } else {
4472                         print "<tr class=\"light\">\n";
4473                 }
4474                 $alternate ^= 1;
4475                 if (defined $tag{'age'}) {
4476                         print "<td><i>$tag{'age'}</i></td>\n";
4477                 } else {
4478                         print "<td></td>\n";
4479                 }
4480                 print "<td>" .
4481                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4482                                -class => "list name"}, esc_html($tag{'name'})) .
4483                       "</td>\n" .
4484                       "<td>";
4485                 if (defined $comment) {
4486                         print format_subject_html($comment, $comment_short,
4487                                                   href(action=>"tag", hash=>$tag{'id'}));
4488                 }
4489                 print "</td>\n" .
4490                       "<td class=\"selflink\">";
4491                 if ($tag{'type'} eq "tag") {
4492                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4493                 } else {
4494                         print "&nbsp;";
4495                 }
4496                 print "</td>\n" .
4497                       "<td class=\"link\">" . " | " .
4498                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4499                 if ($tag{'reftype'} eq "commit") {
4500                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4501                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4502                 } elsif ($tag{'reftype'} eq "blob") {
4503                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4504                 }
4505                 print "</td>\n" .
4506                       "</tr>";
4507         }
4508         if (defined $extra) {
4509                 print "<tr>\n" .
4510                       "<td colspan=\"5\">$extra</td>\n" .
4511                       "</tr>\n";
4512         }
4513         print "</table>\n";
4514 }
4515
4516 sub git_heads_body {
4517         # uses global variable $project
4518         my ($headlist, $head, $from, $to, $extra) = @_;
4519         $from = 0 unless defined $from;
4520         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4521
4522         print "<table class=\"heads\">\n";
4523         my $alternate = 1;
4524         for (my $i = $from; $i <= $to; $i++) {
4525                 my $entry = $headlist->[$i];
4526                 my %ref = %$entry;
4527                 my $curr = $ref{'id'} eq $head;
4528                 if ($alternate) {
4529                         print "<tr class=\"dark\">\n";
4530                 } else {
4531                         print "<tr class=\"light\">\n";
4532                 }
4533                 $alternate ^= 1;
4534                 print "<td><i>$ref{'age'}</i></td>\n" .
4535                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4536                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4537                                -class => "list name"},esc_html($ref{'name'})) .
4538                       "</td>\n" .
4539                       "<td class=\"link\">" .
4540                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4541                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4542                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4543                       "</td>\n" .
4544                       "</tr>";
4545         }
4546         if (defined $extra) {
4547                 print "<tr>\n" .
4548                       "<td colspan=\"3\">$extra</td>\n" .
4549                       "</tr>\n";
4550         }
4551         print "</table>\n";
4552 }
4553
4554 sub git_search_grep_body {
4555         my ($commitlist, $from, $to, $extra) = @_;
4556         $from = 0 unless defined $from;
4557         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4558
4559         print "<table class=\"commit_search\">\n";
4560         my $alternate = 1;
4561         for (my $i = $from; $i <= $to; $i++) {
4562                 my %co = %{$commitlist->[$i]};
4563                 if (!%co) {
4564                         next;
4565                 }
4566                 my $commit = $co{'id'};
4567                 if ($alternate) {
4568                         print "<tr class=\"dark\">\n";
4569                 } else {
4570                         print "<tr class=\"light\">\n";
4571                 }
4572                 $alternate ^= 1;
4573                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4574                       format_author_html('td', \%co, 15, 5) .
4575                       "<td>" .
4576                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4577                                -class => "list subject"},
4578                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4579                 my $comment = $co{'comment'};
4580                 foreach my $line (@$comment) {
4581                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4582                                 my ($lead, $match, $trail) = ($1, $2, $3);
4583                                 $match = chop_str($match, 70, 5, 'center');
4584                                 my $contextlen = int((80 - length($match))/2);
4585                                 $contextlen = 30 if ($contextlen > 30);
4586                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4587                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4588
4589                                 $lead  = esc_html($lead);
4590                                 $match = esc_html($match);
4591                                 $trail = esc_html($trail);
4592
4593                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4594                         }
4595                 }
4596                 print "</td>\n" .
4597                       "<td class=\"link\">" .
4598                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4599                       " | " .
4600                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4601                       " | " .
4602                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4603                 print "</td>\n" .
4604                       "</tr>\n";
4605         }
4606         if (defined $extra) {
4607                 print "<tr>\n" .
4608                       "<td colspan=\"3\">$extra</td>\n" .
4609                       "</tr>\n";
4610         }
4611         print "</table>\n";
4612 }
4613
4614 ## ======================================================================
4615 ## ======================================================================
4616 ## actions
4617
4618 sub git_project_list {
4619         my $order = $input_params{'order'};
4620         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4621                 die_error(400, "Unknown order parameter");
4622         }
4623
4624         my @list = git_get_projects_list();
4625         if (!@list) {
4626                 die_error(404, "No projects found");
4627         }
4628
4629         git_header_html();
4630         if (-f $home_text) {
4631                 print "<div class=\"index_include\">\n";
4632                 insert_file($home_text);
4633                 print "</div>\n";
4634         }
4635         print $cgi->startform(-method => "get") .
4636               "<p class=\"projsearch\">Search:\n" .
4637               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4638               "</p>" .
4639               $cgi->end_form() . "\n";
4640         git_project_list_body(\@list, $order);
4641         git_footer_html();
4642 }
4643
4644 sub git_forks {
4645         my $order = $input_params{'order'};
4646         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4647                 die_error(400, "Unknown order parameter");
4648         }
4649
4650         my @list = git_get_projects_list($project);
4651         if (!@list) {
4652                 die_error(404, "No forks found");
4653         }
4654
4655         git_header_html();
4656         git_print_page_nav('','');
4657         git_print_header_div('summary', "$project forks");
4658         git_project_list_body(\@list, $order);
4659         git_footer_html();
4660 }
4661
4662 sub git_project_index {
4663         my @projects = git_get_projects_list($project);
4664
4665         print $cgi->header(
4666                 -type => 'text/plain',
4667                 -charset => 'utf-8',
4668                 -content_disposition => 'inline; filename="index.aux"');
4669
4670         foreach my $pr (@projects) {
4671                 if (!exists $pr->{'owner'}) {
4672                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4673                 }
4674
4675                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4676                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4677                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4678                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4679                 $path  =~ s/ /\+/g;
4680                 $owner =~ s/ /\+/g;
4681
4682                 print "$path $owner\n";
4683         }
4684 }
4685
4686 sub git_summary {
4687         my $descr = git_get_project_description($project) || "none";
4688         my %co = parse_commit("HEAD");
4689         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4690         my $head = $co{'id'};
4691
4692         my $owner = git_get_project_owner($project);
4693
4694         my $refs = git_get_references();
4695         # These get_*_list functions return one more to allow us to see if
4696         # there are more ...
4697         my @taglist  = git_get_tags_list(16);
4698         my @headlist = git_get_heads_list(16);
4699         my @forklist;
4700         my $check_forks = gitweb_check_feature('forks');
4701
4702         if ($check_forks) {
4703                 @forklist = git_get_projects_list($project);
4704         }
4705
4706         git_header_html();
4707         git_print_page_nav('summary','', $head);
4708
4709         print "<div class=\"title\">&nbsp;</div>\n";
4710         print "<table class=\"projects_list\">\n" .
4711               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4712               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4713         if (defined $cd{'rfc2822'}) {
4714                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4715         }
4716
4717         # use per project git URL list in $projectroot/$project/cloneurl
4718         # or make project git URL from git base URL and project name
4719         my $url_tag = "URL";
4720         my @url_list = git_get_project_url_list($project);
4721         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4722         foreach my $git_url (@url_list) {
4723                 next unless $git_url;
4724                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4725                 $url_tag = "";
4726         }
4727
4728         # Tag cloud
4729         my $show_ctags = gitweb_check_feature('ctags');
4730         if ($show_ctags) {
4731                 my $ctags = git_get_project_ctags($project);
4732                 my $cloud = git_populate_project_tagcloud($ctags);
4733                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4734                 print "</td>\n<td>" unless %$ctags;
4735                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4736                 print "</td>\n<td>" if %$ctags;
4737                 print git_show_project_tagcloud($cloud, 48);
4738                 print "</td></tr>";
4739         }
4740
4741         print "</table>\n";
4742
4743         # If XSS prevention is on, we don't include README.html.
4744         # TODO: Allow a readme in some safe format.
4745         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4746                 print "<div class=\"title\">readme</div>\n" .
4747                       "<div class=\"readme\">\n";
4748                 insert_file("$projectroot/$project/README.html");
4749                 print "\n</div>\n"; # class="readme"
4750         }
4751
4752         # we need to request one more than 16 (0..15) to check if
4753         # those 16 are all
4754         my @commitlist = $head ? parse_commits($head, 17) : ();
4755         if (@commitlist) {
4756                 git_print_header_div('shortlog');
4757                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4758                                   $#commitlist <=  15 ? undef :
4759                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4760         }
4761
4762         if (@taglist) {
4763                 git_print_header_div('tags');
4764                 git_tags_body(\@taglist, 0, 15,
4765                               $#taglist <=  15 ? undef :
4766                               $cgi->a({-href => href(action=>"tags")}, "..."));
4767         }
4768
4769         if (@headlist) {
4770                 git_print_header_div('heads');
4771                 git_heads_body(\@headlist, $head, 0, 15,
4772                                $#headlist <= 15 ? undef :
4773                                $cgi->a({-href => href(action=>"heads")}, "..."));
4774         }
4775
4776         if (@forklist) {
4777                 git_print_header_div('forks');
4778                 git_project_list_body(\@forklist, 'age', 0, 15,
4779                                       $#forklist <= 15 ? undef :
4780                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4781                                       'no_header');
4782         }
4783
4784         git_footer_html();
4785 }
4786
4787 sub git_tag {
4788         my $head = git_get_head_hash($project);
4789         git_header_html();
4790         git_print_page_nav('','', $head,undef,$head);
4791         my %tag = parse_tag($hash);
4792
4793         if (! %tag) {
4794                 die_error(404, "Unknown tag object");
4795         }
4796
4797         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4798         print "<div class=\"title_text\">\n" .
4799               "<table class=\"object_header\">\n" .
4800               "<tr>\n" .
4801               "<td>object</td>\n" .
4802               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4803                                $tag{'object'}) . "</td>\n" .
4804               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4805                                               $tag{'type'}) . "</td>\n" .
4806               "</tr>\n";
4807         if (defined($tag{'author'})) {
4808                 git_print_authorship_rows(\%tag, 'author');
4809         }
4810         print "</table>\n\n" .
4811               "</div>\n";
4812         print "<div class=\"page_body\">";
4813         my $comment = $tag{'comment'};
4814         foreach my $line (@$comment) {
4815                 chomp $line;
4816                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4817         }
4818         print "</div>\n";
4819         git_footer_html();
4820 }
4821
4822 sub git_blame_common {
4823         my $format = shift || 'porcelain';
4824         if ($format eq 'porcelain' && $cgi->param('js')) {
4825                 $format = 'incremental';
4826                 $action = 'blame_incremental'; # for page title etc
4827         }
4828
4829         # permissions
4830         gitweb_check_feature('blame')
4831                 or die_error(403, "Blame view not allowed");
4832
4833         # error checking
4834         die_error(400, "No file name given") unless $file_name;
4835         $hash_base ||= git_get_head_hash($project);
4836         die_error(404, "Couldn't find base commit") unless $hash_base;
4837         my %co = parse_commit($hash_base)
4838                 or die_error(404, "Commit not found");
4839         my $ftype = "blob";
4840         if (!defined $hash) {
4841                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4842                         or die_error(404, "Error looking up file");
4843         } else {
4844                 $ftype = git_get_type($hash);
4845                 if ($ftype !~ "blob") {
4846                         die_error(400, "Object is not a blob");
4847                 }
4848         }
4849
4850         my $fd;
4851         if ($format eq 'incremental') {
4852                 # get file contents (as base)
4853                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
4854                         or die_error(500, "Open git-cat-file failed");
4855         } elsif ($format eq 'data') {
4856                 # run git-blame --incremental
4857                 open $fd, "-|", git_cmd(), "blame", "--incremental",
4858                         $hash_base, "--", $file_name
4859                         or die_error(500, "Open git-blame --incremental failed");
4860         } else {
4861                 # run git-blame --porcelain
4862                 open $fd, "-|", git_cmd(), "blame", '-p',
4863                         $hash_base, '--', $file_name
4864                         or die_error(500, "Open git-blame --porcelain failed");
4865         }
4866
4867         # incremental blame data returns early
4868         if ($format eq 'data') {
4869                 print $cgi->header(
4870                         -type=>"text/plain", -charset => "utf-8",
4871                         -status=> "200 OK");
4872                 local $| = 1; # output autoflush
4873                 print while <$fd>;
4874                 close $fd
4875                         or print "ERROR $!\n";
4876
4877                 print 'END';
4878                 if (defined $t0 && gitweb_check_feature('timed')) {
4879                         print ' '.
4880                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
4881                               ' '.$number_of_git_cmds;
4882                 }
4883                 print "\n";
4884
4885                 return;
4886         }
4887
4888         # page header
4889         git_header_html();
4890         my $formats_nav =
4891                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4892                         "blob") .
4893                 " | " .
4894                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4895                         "history") .
4896                 " | " .
4897                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
4898                         "HEAD");
4899         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4900         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4901         git_print_page_path($file_name, $ftype, $hash_base);
4902
4903         # page body
4904         if ($format eq 'incremental') {
4905                 print "<noscript>\n<div class=\"error\"><center><b>\n".
4906                       "This page requires JavaScript to run.\n Use ".
4907                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
4908                               'this page').
4909                       " instead.\n".
4910                       "</b></center></div>\n</noscript>\n";
4911
4912                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
4913         }
4914
4915         print qq!<div class="page_body">\n!;
4916         print qq!<div id="progress_info">... / ...</div>\n!
4917                 if ($format eq 'incremental');
4918         print qq!<table id="blame_table" class="blame" width="100%">\n!.
4919               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
4920               qq!<thead>\n!.
4921               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
4922               qq!</thead>\n!.
4923               qq!<tbody>\n!;
4924
4925         my @rev_color = qw(light dark);
4926         my $num_colors = scalar(@rev_color);
4927         my $current_color = 0;
4928
4929         if ($format eq 'incremental') {
4930                 my $color_class = $rev_color[$current_color];
4931
4932                 #contents of a file
4933                 my $linenr = 0;
4934         LINE:
4935                 while (my $line = <$fd>) {
4936                         chomp $line;
4937                         $linenr++;
4938
4939                         print qq!<tr id="l$linenr" class="$color_class">!.
4940                               qq!<td class="sha1"><a href=""> </a></td>!.
4941                               qq!<td class="linenr">!.
4942                               qq!<a class="linenr" href="">$linenr</a></td>!;
4943                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
4944                         print qq!</tr>\n!;
4945                 }
4946
4947         } else { # porcelain, i.e. ordinary blame
4948                 my %metainfo = (); # saves information about commits
4949
4950                 # blame data
4951         LINE:
4952                 while (my $line = <$fd>) {
4953                         chomp $line;
4954                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4955                         # no <lines in group> for subsequent lines in group of lines
4956                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
4957                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4958                         if (!exists $metainfo{$full_rev}) {
4959                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
4960                         }
4961                         my $meta = $metainfo{$full_rev};
4962                         my $data;
4963                         while ($data = <$fd>) {
4964                                 chomp $data;
4965                                 last if ($data =~ s/^\t//); # contents of line
4966                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
4967                                         $meta->{$1} = $2 unless exists $meta->{$1};
4968                                 }
4969                                 if ($data =~ /^previous /) {
4970                                         $meta->{'nprevious'}++;
4971                                 }
4972                         }
4973                         my $short_rev = substr($full_rev, 0, 8);
4974                         my $author = $meta->{'author'};
4975                         my %date =
4976                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4977                         my $date = $date{'iso-tz'};
4978                         if ($group_size) {
4979                                 $current_color = ($current_color + 1) % $num_colors;
4980                         }
4981                         my $tr_class = $rev_color[$current_color];
4982                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4983                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4984                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4985                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4986                         if ($group_size) {
4987                                 print "<td class=\"sha1\"";
4988                                 print " title=\"". esc_html($author) . ", $date\"";
4989                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
4990                                 print ">";
4991                                 print $cgi->a({-href => href(action=>"commit",
4992                                                              hash=>$full_rev,
4993                                                              file_name=>$file_name)},
4994                                               esc_html($short_rev));
4995                                 if ($group_size >= 2) {
4996                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4997                                         if (@author_initials) {
4998                                                 print "<br />" .
4999                                                       esc_html(join('', @author_initials));
5000                                                 #           or join('.', ...)
5001                                         }
5002                                 }
5003                                 print "</td>\n";
5004                         }
5005                         # 'previous' <sha1 of parent commit> <filename at commit>
5006                         if (exists $meta->{'previous'} &&
5007                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5008                                 $meta->{'parent'} = $1;
5009                                 $meta->{'file_parent'} = unquote($2);
5010                         }
5011                         my $linenr_commit =
5012                                 exists($meta->{'parent'}) ?
5013                                 $meta->{'parent'} : $full_rev;
5014                         my $linenr_filename =
5015                                 exists($meta->{'file_parent'}) ?
5016                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5017                         my $blamed = href(action => 'blame',
5018                                           file_name => $linenr_filename,
5019                                           hash_base => $linenr_commit);
5020                         print "<td class=\"linenr\">";
5021                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5022                                         -class => "linenr" },
5023                                       esc_html($lineno));
5024                         print "</td>";
5025                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5026                         print "</tr>\n";
5027                 } # end while
5028
5029         }
5030
5031         # footer
5032         print "</tbody>\n".
5033               "</table>\n"; # class="blame"
5034         print "</div>\n";   # class="blame_body"
5035         close $fd
5036                 or print "Reading blob failed\n";
5037
5038         git_footer_html();
5039 }
5040
5041 sub git_blame {
5042         git_blame_common();
5043 }
5044
5045 sub git_blame_incremental {
5046         git_blame_common('incremental');
5047 }
5048
5049 sub git_blame_data {
5050         git_blame_common('data');
5051 }
5052
5053 sub git_tags {
5054         my $head = git_get_head_hash($project);
5055         git_header_html();
5056         git_print_page_nav('','', $head,undef,$head);
5057         git_print_header_div('summary', $project);
5058
5059         my @tagslist = git_get_tags_list();
5060         if (@tagslist) {
5061                 git_tags_body(\@tagslist);
5062         }
5063         git_footer_html();
5064 }
5065
5066 sub git_heads {
5067         my $head = git_get_head_hash($project);
5068         git_header_html();
5069         git_print_page_nav('','', $head,undef,$head);
5070         git_print_header_div('summary', $project);
5071
5072         my @headslist = git_get_heads_list();
5073         if (@headslist) {
5074                 git_heads_body(\@headslist, $head);
5075         }
5076         git_footer_html();
5077 }
5078
5079 sub git_blob_plain {
5080         my $type = shift;
5081         my $expires;
5082
5083         if (!defined $hash) {
5084                 if (defined $file_name) {
5085                         my $base = $hash_base || git_get_head_hash($project);
5086                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5087                                 or die_error(404, "Cannot find file");
5088                 } else {
5089                         die_error(400, "No file name defined");
5090                 }
5091         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5092                 # blobs defined by non-textual hash id's can be cached
5093                 $expires = "+1d";
5094         }
5095
5096         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5097                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5098
5099         # content-type (can include charset)
5100         $type = blob_contenttype($fd, $file_name, $type);
5101
5102         # "save as" filename, even when no $file_name is given
5103         my $save_as = "$hash";
5104         if (defined $file_name) {
5105                 $save_as = $file_name;
5106         } elsif ($type =~ m/^text\//) {
5107                 $save_as .= '.txt';
5108         }
5109
5110         # With XSS prevention on, blobs of all types except a few known safe
5111         # ones are served with "Content-Disposition: attachment" to make sure
5112         # they don't run in our security domain.  For certain image types,
5113         # blob view writes an <img> tag referring to blob_plain view, and we
5114         # want to be sure not to break that by serving the image as an
5115         # attachment (though Firefox 3 doesn't seem to care).
5116         my $sandbox = $prevent_xss &&
5117                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5118
5119         print $cgi->header(
5120                 -type => $type,
5121                 -expires => $expires,
5122                 -content_disposition =>
5123                         ($sandbox ? 'attachment' : 'inline')
5124                         . '; filename="' . $save_as . '"');
5125         local $/ = undef;
5126         binmode STDOUT, ':raw';
5127         print <$fd>;
5128         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5129         close $fd;
5130 }
5131
5132 sub git_blob {
5133         my $expires;
5134
5135         if (!defined $hash) {
5136                 if (defined $file_name) {
5137                         my $base = $hash_base || git_get_head_hash($project);
5138                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5139                                 or die_error(404, "Cannot find file");
5140                 } else {
5141                         die_error(400, "No file name defined");
5142                 }
5143         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5144                 # blobs defined by non-textual hash id's can be cached
5145                 $expires = "+1d";
5146         }
5147
5148         my $have_blame = gitweb_check_feature('blame');
5149         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5150                 or die_error(500, "Couldn't cat $file_name, $hash");
5151         my $mimetype = blob_mimetype($fd, $file_name);
5152         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5153                 close $fd;
5154                 return git_blob_plain($mimetype);
5155         }
5156         # we can have blame only for text/* mimetype
5157         $have_blame &&= ($mimetype =~ m!^text/!);
5158
5159         git_header_html(undef, $expires);
5160         my $formats_nav = '';
5161         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5162                 if (defined $file_name) {
5163                         if ($have_blame) {
5164                                 $formats_nav .=
5165                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5166                                                 "blame") .
5167                                         " | ";
5168                         }
5169                         $formats_nav .=
5170                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5171                                         "history") .
5172                                 " | " .
5173                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5174                                         "raw") .
5175                                 " | " .
5176                                 $cgi->a({-href => href(action=>"blob",
5177                                                        hash_base=>"HEAD", file_name=>$file_name)},
5178                                         "HEAD");
5179                 } else {
5180                         $formats_nav .=
5181                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5182                                         "raw");
5183                 }
5184                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5185                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5186         } else {
5187                 print "<div class=\"page_nav\">\n" .
5188                       "<br/><br/></div>\n" .
5189                       "<div class=\"title\">$hash</div>\n";
5190         }
5191         git_print_page_path($file_name, "blob", $hash_base);
5192         print "<div class=\"page_body\">\n";
5193         if ($mimetype =~ m!^image/!) {
5194                 print qq!<img type="$mimetype"!;
5195                 if ($file_name) {
5196                         print qq! alt="$file_name" title="$file_name"!;
5197                 }
5198                 print qq! src="! .
5199                       href(action=>"blob_plain", hash=>$hash,
5200                            hash_base=>$hash_base, file_name=>$file_name) .
5201                       qq!" />\n!;
5202         } else {
5203                 my $nr;
5204                 while (my $line = <$fd>) {
5205                         chomp $line;
5206                         $nr++;
5207                         $line = untabify($line);
5208                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5209                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5210                 }
5211         }
5212         close $fd
5213                 or print "Reading blob failed.\n";
5214         print "</div>";
5215         git_footer_html();
5216 }
5217
5218 sub git_tree {
5219         if (!defined $hash_base) {
5220                 $hash_base = "HEAD";
5221         }
5222         if (!defined $hash) {
5223                 if (defined $file_name) {
5224                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5225                 } else {
5226                         $hash = $hash_base;
5227                 }
5228         }
5229         die_error(404, "No such tree") unless defined($hash);
5230
5231         my @entries = ();
5232         {
5233                 local $/ = "\0";
5234                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
5235                         or die_error(500, "Open git-ls-tree failed");
5236                 @entries = map { chomp; $_ } <$fd>;
5237                 close $fd
5238                         or die_error(404, "Reading tree failed");
5239         }
5240
5241         my $refs = git_get_references();
5242         my $ref = format_ref_marker($refs, $hash_base);
5243         git_header_html();
5244         my $basedir = '';
5245         my $have_blame = gitweb_check_feature('blame');
5246         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5247                 my @views_nav = ();
5248                 if (defined $file_name) {
5249                         push @views_nav,
5250                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5251                                         "history"),
5252                                 $cgi->a({-href => href(action=>"tree",
5253                                                        hash_base=>"HEAD", file_name=>$file_name)},
5254                                         "HEAD"),
5255                 }
5256                 my $snapshot_links = format_snapshot_links($hash);
5257                 if (defined $snapshot_links) {
5258                         # FIXME: Should be available when we have no hash base as well.
5259                         push @views_nav, $snapshot_links;
5260                 }
5261                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
5262                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5263         } else {
5264                 undef $hash_base;
5265                 print "<div class=\"page_nav\">\n";
5266                 print "<br/><br/></div>\n";
5267                 print "<div class=\"title\">$hash</div>\n";
5268         }
5269         if (defined $file_name) {
5270                 $basedir = $file_name;
5271                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5272                         $basedir .= '/';
5273                 }
5274                 git_print_page_path($file_name, 'tree', $hash_base);
5275         }
5276         print "<div class=\"page_body\">\n";
5277         print "<table class=\"tree\">\n";
5278         my $alternate = 1;
5279         # '..' (top directory) link if possible
5280         if (defined $hash_base &&
5281             defined $file_name && $file_name =~ m![^/]+$!) {
5282                 if ($alternate) {
5283                         print "<tr class=\"dark\">\n";
5284                 } else {
5285                         print "<tr class=\"light\">\n";
5286                 }
5287                 $alternate ^= 1;
5288
5289                 my $up = $file_name;
5290                 $up =~ s!/?[^/]+$!!;
5291                 undef $up unless $up;
5292                 # based on git_print_tree_entry
5293                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5294                 print '<td class="list">';
5295                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
5296                                              file_name=>$up)},
5297                               "..");
5298                 print "</td>\n";
5299                 print "<td class=\"link\"></td>\n";
5300
5301                 print "</tr>\n";
5302         }
5303         foreach my $line (@entries) {
5304                 my %t = parse_ls_tree_line($line, -z => 1);
5305
5306                 if ($alternate) {
5307                         print "<tr class=\"dark\">\n";
5308                 } else {
5309                         print "<tr class=\"light\">\n";
5310                 }
5311                 $alternate ^= 1;
5312
5313                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5314
5315                 print "</tr>\n";
5316         }
5317         print "</table>\n" .
5318               "</div>";
5319         git_footer_html();
5320 }
5321
5322 sub git_snapshot {
5323         my $format = $input_params{'snapshot_format'};
5324         if (!@snapshot_fmts) {
5325                 die_error(403, "Snapshots not allowed");
5326         }
5327         # default to first supported snapshot format
5328         $format ||= $snapshot_fmts[0];
5329         if ($format !~ m/^[a-z0-9]+$/) {
5330                 die_error(400, "Invalid snapshot format parameter");
5331         } elsif (!exists($known_snapshot_formats{$format})) {
5332                 die_error(400, "Unknown snapshot format");
5333         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5334                 die_error(403, "Snapshot format not allowed");
5335         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5336                 die_error(403, "Unsupported snapshot format");
5337         }
5338
5339         if (!defined $hash) {
5340                 $hash = git_get_head_hash($project);
5341         }
5342
5343         my $name = $project;
5344         $name =~ s,([^/])/*\.git$,$1,;
5345         $name = basename($name);
5346         my $filename = to_utf8($name);
5347         $name =~ s/\047/\047\\\047\047/g;
5348         my $cmd;
5349         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5350         $cmd = quote_command(
5351                 git_cmd(), 'archive',
5352                 "--format=$known_snapshot_formats{$format}{'format'}",
5353                 "--prefix=$name/", $hash);
5354         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5355                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5356         }
5357
5358         print $cgi->header(
5359                 -type => $known_snapshot_formats{$format}{'type'},
5360                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5361                 -status => '200 OK');
5362
5363         open my $fd, "-|", $cmd
5364                 or die_error(500, "Execute git-archive failed");
5365         binmode STDOUT, ':raw';
5366         print <$fd>;
5367         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5368         close $fd;
5369 }
5370
5371 sub git_log {
5372         my $head = git_get_head_hash($project);
5373         if (!defined $hash) {
5374                 $hash = $head;
5375         }
5376         if (!defined $page) {
5377                 $page = 0;
5378         }
5379         my $refs = git_get_references();
5380
5381         my @commitlist = parse_commits($hash, 101, (100 * $page));
5382
5383         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5384
5385         my ($patch_max) = gitweb_get_feature('patches');
5386         if ($patch_max) {
5387                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5388                         $paging_nav .= " &sdot; " .
5389                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5390                                         "patches");
5391                 }
5392         }
5393
5394         git_header_html();
5395         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5396
5397         if (!@commitlist) {
5398                 my %co = parse_commit($hash);
5399
5400                 git_print_header_div('summary', $project);
5401                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5402         }
5403         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5404         for (my $i = 0; $i <= $to; $i++) {
5405                 my %co = %{$commitlist[$i]};
5406                 next if !%co;
5407                 my $commit = $co{'id'};
5408                 my $ref = format_ref_marker($refs, $commit);
5409                 my %ad = parse_date($co{'author_epoch'});
5410                 git_print_header_div('commit',
5411                                "<span class=\"age\">$co{'age_string'}</span>" .
5412                                esc_html($co{'title'}) . $ref,
5413                                $commit);
5414                 print "<div class=\"title_text\">\n" .
5415                       "<div class=\"log_link\">\n" .
5416                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5417                       " | " .
5418                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5419                       " | " .
5420                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5421                       "<br/>\n" .
5422                       "</div>\n";
5423                       git_print_authorship(\%co, -tag => 'span');
5424                       print "<br/>\n</div>\n";
5425
5426                 print "<div class=\"log_body\">\n";
5427                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5428                 print "</div>\n";
5429         }
5430         if ($#commitlist >= 100) {
5431                 print "<div class=\"page_nav\">\n";
5432                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5433                                -accesskey => "n", -title => "Alt-n"}, "next");
5434                 print "</div>\n";
5435         }
5436         git_footer_html();
5437 }
5438
5439 sub git_commit {
5440         $hash ||= $hash_base || "HEAD";
5441         my %co = parse_commit($hash)
5442             or die_error(404, "Unknown commit object");
5443
5444         my $parent  = $co{'parent'};
5445         my $parents = $co{'parents'}; # listref
5446
5447         # we need to prepare $formats_nav before any parameter munging
5448         my $formats_nav;
5449         if (!defined $parent) {
5450                 # --root commitdiff
5451                 $formats_nav .= '(initial)';
5452         } elsif (@$parents == 1) {
5453                 # single parent commit
5454                 $formats_nav .=
5455                         '(parent: ' .
5456                         $cgi->a({-href => href(action=>"commit",
5457                                                hash=>$parent)},
5458                                 esc_html(substr($parent, 0, 7))) .
5459                         ')';
5460         } else {
5461                 # merge commit
5462                 $formats_nav .=
5463                         '(merge: ' .
5464                         join(' ', map {
5465                                 $cgi->a({-href => href(action=>"commit",
5466                                                        hash=>$_)},
5467                                         esc_html(substr($_, 0, 7)));
5468                         } @$parents ) .
5469                         ')';
5470         }
5471         if (gitweb_check_feature('patches')) {
5472                 $formats_nav .= " | " .
5473                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5474                                 "patch");
5475         }
5476
5477         if (!defined $parent) {
5478                 $parent = "--root";
5479         }
5480         my @difftree;
5481         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5482                 @diff_opts,
5483                 (@$parents <= 1 ? $parent : '-c'),
5484                 $hash, "--"
5485                 or die_error(500, "Open git-diff-tree failed");
5486         @difftree = map { chomp; $_ } <$fd>;
5487         close $fd or die_error(404, "Reading git-diff-tree failed");
5488
5489         # non-textual hash id's can be cached
5490         my $expires;
5491         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5492                 $expires = "+1d";
5493         }
5494         my $refs = git_get_references();
5495         my $ref = format_ref_marker($refs, $co{'id'});
5496
5497         git_header_html(undef, $expires);
5498         git_print_page_nav('commit', '',
5499                            $hash, $co{'tree'}, $hash,
5500                            $formats_nav);
5501
5502         if (defined $co{'parent'}) {
5503                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5504         } else {
5505                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5506         }
5507         print "<div class=\"title_text\">\n" .
5508               "<table class=\"object_header\">\n";
5509         git_print_authorship_rows(\%co);
5510         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5511         print "<tr>" .
5512               "<td>tree</td>" .
5513               "<td class=\"sha1\">" .
5514               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5515                        class => "list"}, $co{'tree'}) .
5516               "</td>" .
5517               "<td class=\"link\">" .
5518               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5519                       "tree");
5520         my $snapshot_links = format_snapshot_links($hash);
5521         if (defined $snapshot_links) {
5522                 print " | " . $snapshot_links;
5523         }
5524         print "</td>" .
5525               "</tr>\n";
5526
5527         foreach my $par (@$parents) {
5528                 print "<tr>" .
5529                       "<td>parent</td>" .
5530                       "<td class=\"sha1\">" .
5531                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5532                                class => "list"}, $par) .
5533                       "</td>" .
5534                       "<td class=\"link\">" .
5535                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5536                       " | " .
5537                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5538                       "</td>" .
5539                       "</tr>\n";
5540         }
5541         print "</table>".
5542               "</div>\n";
5543
5544         print "<div class=\"page_body\">\n";
5545         git_print_log($co{'comment'});
5546         print "</div>\n";
5547
5548         git_difftree_body(\@difftree, $hash, @$parents);
5549
5550         git_footer_html();
5551 }
5552
5553 sub git_object {
5554         # object is defined by:
5555         # - hash or hash_base alone
5556         # - hash_base and file_name
5557         my $type;
5558
5559         # - hash or hash_base alone
5560         if ($hash || ($hash_base && !defined $file_name)) {
5561                 my $object_id = $hash || $hash_base;
5562
5563                 open my $fd, "-|", quote_command(
5564                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5565                         or die_error(404, "Object does not exist");
5566                 $type = <$fd>;
5567                 chomp $type;
5568                 close $fd
5569                         or die_error(404, "Object does not exist");
5570
5571         # - hash_base and file_name
5572         } elsif ($hash_base && defined $file_name) {
5573                 $file_name =~ s,/+$,,;
5574
5575                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5576                         or die_error(404, "Base object does not exist");
5577
5578                 # here errors should not hapen
5579                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5580                         or die_error(500, "Open git-ls-tree failed");
5581                 my $line = <$fd>;
5582                 close $fd;
5583
5584                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5585                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5586                         die_error(404, "File or directory for given base does not exist");
5587                 }
5588                 $type = $2;
5589                 $hash = $3;
5590         } else {
5591                 die_error(400, "Not enough information to find object");
5592         }
5593
5594         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5595                                           hash=>$hash, hash_base=>$hash_base,
5596                                           file_name=>$file_name),
5597                              -status => '302 Found');
5598 }
5599
5600 sub git_blobdiff {
5601         my $format = shift || 'html';
5602
5603         my $fd;
5604         my @difftree;
5605         my %diffinfo;
5606         my $expires;
5607
5608         # preparing $fd and %diffinfo for git_patchset_body
5609         # new style URI
5610         if (defined $hash_base && defined $hash_parent_base) {
5611                 if (defined $file_name) {
5612                         # read raw output
5613                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5614                                 $hash_parent_base, $hash_base,
5615                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5616                                 or die_error(500, "Open git-diff-tree failed");
5617                         @difftree = map { chomp; $_ } <$fd>;
5618                         close $fd
5619                                 or die_error(404, "Reading git-diff-tree failed");
5620                         @difftree
5621                                 or die_error(404, "Blob diff not found");
5622
5623                 } elsif (defined $hash &&
5624                          $hash =~ /[0-9a-fA-F]{40}/) {
5625                         # try to find filename from $hash
5626
5627                         # read filtered raw output
5628                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5629                                 $hash_parent_base, $hash_base, "--"
5630                                 or die_error(500, "Open git-diff-tree failed");
5631                         @difftree =
5632                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5633                                 # $hash == to_id
5634                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5635                                 map { chomp; $_ } <$fd>;
5636                         close $fd
5637                                 or die_error(404, "Reading git-diff-tree failed");
5638                         @difftree
5639                                 or die_error(404, "Blob diff not found");
5640
5641                 } else {
5642                         die_error(400, "Missing one of the blob diff parameters");
5643                 }
5644
5645                 if (@difftree > 1) {
5646                         die_error(400, "Ambiguous blob diff specification");
5647                 }
5648
5649                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5650                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5651                 $file_name   ||= $diffinfo{'to_file'};
5652
5653                 $hash_parent ||= $diffinfo{'from_id'};
5654                 $hash        ||= $diffinfo{'to_id'};
5655
5656                 # non-textual hash id's can be cached
5657                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5658                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5659                         $expires = '+1d';
5660                 }
5661
5662                 # open patch output
5663                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5664                         '-p', ($format eq 'html' ? "--full-index" : ()),
5665                         $hash_parent_base, $hash_base,
5666                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5667                         or die_error(500, "Open git-diff-tree failed");
5668         }
5669
5670         # old/legacy style URI -- not generated anymore since 1.4.3.
5671         if (!%diffinfo) {
5672                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5673         }
5674
5675         # header
5676         if ($format eq 'html') {
5677                 my $formats_nav =
5678                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5679                                 "raw");
5680                 git_header_html(undef, $expires);
5681                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5682                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5683                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5684                 } else {
5685                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5686                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5687                 }
5688                 if (defined $file_name) {
5689                         git_print_page_path($file_name, "blob", $hash_base);
5690                 } else {
5691                         print "<div class=\"page_path\"></div>\n";
5692                 }
5693
5694         } elsif ($format eq 'plain') {
5695                 print $cgi->header(
5696                         -type => 'text/plain',
5697                         -charset => 'utf-8',
5698                         -expires => $expires,
5699                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5700
5701                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5702
5703         } else {
5704                 die_error(400, "Unknown blobdiff format");
5705         }
5706
5707         # patch
5708         if ($format eq 'html') {
5709                 print "<div class=\"page_body\">\n";
5710
5711                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5712                 close $fd;
5713
5714                 print "</div>\n"; # class="page_body"
5715                 git_footer_html();
5716
5717         } else {
5718                 while (my $line = <$fd>) {
5719                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5720                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5721
5722                         print $line;
5723
5724                         last if $line =~ m!^\+\+\+!;
5725                 }
5726                 local $/ = undef;
5727                 print <$fd>;
5728                 close $fd;
5729         }
5730 }
5731
5732 sub git_blobdiff_plain {
5733         git_blobdiff('plain');
5734 }
5735
5736 sub git_commitdiff {
5737         my %params = @_;
5738         my $format = $params{-format} || 'html';
5739
5740         my ($patch_max) = gitweb_get_feature('patches');
5741         if ($format eq 'patch') {
5742                 die_error(403, "Patch view not allowed") unless $patch_max;
5743         }
5744
5745         $hash ||= $hash_base || "HEAD";
5746         my %co = parse_commit($hash)
5747             or die_error(404, "Unknown commit object");
5748
5749         # choose format for commitdiff for merge
5750         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5751                 $hash_parent = '--cc';
5752         }
5753         # we need to prepare $formats_nav before almost any parameter munging
5754         my $formats_nav;
5755         if ($format eq 'html') {
5756                 $formats_nav =
5757                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5758                                 "raw");
5759                 if ($patch_max) {
5760                         $formats_nav .= " | " .
5761                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5762                                         "patch");
5763                 }
5764
5765                 if (defined $hash_parent &&
5766                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5767                         # commitdiff with two commits given
5768                         my $hash_parent_short = $hash_parent;
5769                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5770                                 $hash_parent_short = substr($hash_parent, 0, 7);
5771                         }
5772                         $formats_nav .=
5773                                 ' (from';
5774                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5775                                 if ($co{'parents'}[$i] eq $hash_parent) {
5776                                         $formats_nav .= ' parent ' . ($i+1);
5777                                         last;
5778                                 }
5779                         }
5780                         $formats_nav .= ': ' .
5781                                 $cgi->a({-href => href(action=>"commitdiff",
5782                                                        hash=>$hash_parent)},
5783                                         esc_html($hash_parent_short)) .
5784                                 ')';
5785                 } elsif (!$co{'parent'}) {
5786                         # --root commitdiff
5787                         $formats_nav .= ' (initial)';
5788                 } elsif (scalar @{$co{'parents'}} == 1) {
5789                         # single parent commit
5790                         $formats_nav .=
5791                                 ' (parent: ' .
5792                                 $cgi->a({-href => href(action=>"commitdiff",
5793                                                        hash=>$co{'parent'})},
5794                                         esc_html(substr($co{'parent'}, 0, 7))) .
5795                                 ')';
5796                 } else {
5797                         # merge commit
5798                         if ($hash_parent eq '--cc') {
5799                                 $formats_nav .= ' | ' .
5800                                         $cgi->a({-href => href(action=>"commitdiff",
5801                                                                hash=>$hash, hash_parent=>'-c')},
5802                                                 'combined');
5803                         } else { # $hash_parent eq '-c'
5804                                 $formats_nav .= ' | ' .
5805                                         $cgi->a({-href => href(action=>"commitdiff",
5806                                                                hash=>$hash, hash_parent=>'--cc')},
5807                                                 'compact');
5808                         }
5809                         $formats_nav .=
5810                                 ' (merge: ' .
5811                                 join(' ', map {
5812                                         $cgi->a({-href => href(action=>"commitdiff",
5813                                                                hash=>$_)},
5814                                                 esc_html(substr($_, 0, 7)));
5815                                 } @{$co{'parents'}} ) .
5816                                 ')';
5817                 }
5818         }
5819
5820         my $hash_parent_param = $hash_parent;
5821         if (!defined $hash_parent_param) {
5822                 # --cc for multiple parents, --root for parentless
5823                 $hash_parent_param =
5824                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5825         }
5826
5827         # read commitdiff
5828         my $fd;
5829         my @difftree;
5830         if ($format eq 'html') {
5831                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5832                         "--no-commit-id", "--patch-with-raw", "--full-index",
5833                         $hash_parent_param, $hash, "--"
5834                         or die_error(500, "Open git-diff-tree failed");
5835
5836                 while (my $line = <$fd>) {
5837                         chomp $line;
5838                         # empty line ends raw part of diff-tree output
5839                         last unless $line;
5840                         push @difftree, scalar parse_difftree_raw_line($line);
5841                 }
5842
5843         } elsif ($format eq 'plain') {
5844                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5845                         '-p', $hash_parent_param, $hash, "--"
5846                         or die_error(500, "Open git-diff-tree failed");
5847         } elsif ($format eq 'patch') {
5848                 # For commit ranges, we limit the output to the number of
5849                 # patches specified in the 'patches' feature.
5850                 # For single commits, we limit the output to a single patch,
5851                 # diverging from the git-format-patch default.
5852                 my @commit_spec = ();
5853                 if ($hash_parent) {
5854                         if ($patch_max > 0) {
5855                                 push @commit_spec, "-$patch_max";
5856                         }
5857                         push @commit_spec, '-n', "$hash_parent..$hash";
5858                 } else {
5859                         if ($params{-single}) {
5860                                 push @commit_spec, '-1';
5861                         } else {
5862                                 if ($patch_max > 0) {
5863                                         push @commit_spec, "-$patch_max";
5864                                 }
5865                                 push @commit_spec, "-n";
5866                         }
5867                         push @commit_spec, '--root', $hash;
5868                 }
5869                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5870                         '--stdout', @commit_spec
5871                         or die_error(500, "Open git-format-patch failed");
5872         } else {
5873                 die_error(400, "Unknown commitdiff format");
5874         }
5875
5876         # non-textual hash id's can be cached
5877         my $expires;
5878         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5879                 $expires = "+1d";
5880         }
5881
5882         # write commit message
5883         if ($format eq 'html') {
5884                 my $refs = git_get_references();
5885                 my $ref = format_ref_marker($refs, $co{'id'});
5886
5887                 git_header_html(undef, $expires);
5888                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5889                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5890                 print "<div class=\"title_text\">\n" .
5891                       "<table class=\"object_header\">\n";
5892                 git_print_authorship_rows(\%co);
5893                 print "</table>".
5894                       "</div>\n";
5895                 print "<div class=\"page_body\">\n";
5896                 if (@{$co{'comment'}} > 1) {
5897                         print "<div class=\"log\">\n";
5898                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5899                         print "</div>\n"; # class="log"
5900                 }
5901
5902         } elsif ($format eq 'plain') {
5903                 my $refs = git_get_references("tags");
5904                 my $tagname = git_get_rev_name_tags($hash);
5905                 my $filename = basename($project) . "-$hash.patch";
5906
5907                 print $cgi->header(
5908                         -type => 'text/plain',
5909                         -charset => 'utf-8',
5910                         -expires => $expires,
5911                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5912                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5913                 print "From: " . to_utf8($co{'author'}) . "\n";
5914                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5915                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5916
5917                 print "X-Git-Tag: $tagname\n" if $tagname;
5918                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5919
5920                 foreach my $line (@{$co{'comment'}}) {
5921                         print to_utf8($line) . "\n";
5922                 }
5923                 print "---\n\n";
5924         } elsif ($format eq 'patch') {
5925                 my $filename = basename($project) . "-$hash.patch";
5926
5927                 print $cgi->header(
5928                         -type => 'text/plain',
5929                         -charset => 'utf-8',
5930                         -expires => $expires,
5931                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5932         }
5933
5934         # write patch
5935         if ($format eq 'html') {
5936                 my $use_parents = !defined $hash_parent ||
5937                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5938                 git_difftree_body(\@difftree, $hash,
5939                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5940                 print "<br/>\n";
5941
5942                 git_patchset_body($fd, \@difftree, $hash,
5943                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5944                 close $fd;
5945                 print "</div>\n"; # class="page_body"
5946                 git_footer_html();
5947
5948         } elsif ($format eq 'plain') {
5949                 local $/ = undef;
5950                 print <$fd>;
5951                 close $fd
5952                         or print "Reading git-diff-tree failed\n";
5953         } elsif ($format eq 'patch') {
5954                 local $/ = undef;
5955                 print <$fd>;
5956                 close $fd
5957                         or print "Reading git-format-patch failed\n";
5958         }
5959 }
5960
5961 sub git_commitdiff_plain {
5962         git_commitdiff(-format => 'plain');
5963 }
5964
5965 # format-patch-style patches
5966 sub git_patch {
5967         git_commitdiff(-format => 'patch', -single=> 1);
5968 }
5969
5970 sub git_patches {
5971         git_commitdiff(-format => 'patch');
5972 }
5973
5974 sub git_history {
5975         if (!defined $hash_base) {
5976                 $hash_base = git_get_head_hash($project);
5977         }
5978         if (!defined $page) {
5979                 $page = 0;
5980         }
5981         my $ftype;
5982         my %co = parse_commit($hash_base)
5983             or die_error(404, "Unknown commit object");
5984
5985         my $refs = git_get_references();
5986         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5987
5988         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5989                                        $file_name, "--full-history")
5990             or die_error(404, "No such file or directory on given branch");
5991
5992         if (!defined $hash && defined $file_name) {
5993                 # some commits could have deleted file in question,
5994                 # and not have it in tree, but one of them has to have it
5995                 for (my $i = 0; $i <= @commitlist; $i++) {
5996                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5997                         last if defined $hash;
5998                 }
5999         }
6000         if (defined $hash) {
6001                 $ftype = git_get_type($hash);
6002         }
6003         if (!defined $ftype) {
6004                 die_error(500, "Unknown type of object");
6005         }
6006
6007         my $paging_nav = '';
6008         if ($page > 0) {
6009                 $paging_nav .=
6010                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
6011                                                file_name=>$file_name)},
6012                                 "first");
6013                 $paging_nav .= " &sdot; " .
6014                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6015                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6016         } else {
6017                 $paging_nav .= "first";
6018                 $paging_nav .= " &sdot; prev";
6019         }
6020         my $next_link = '';
6021         if ($#commitlist >= 100) {
6022                 $next_link =
6023                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6024                                  -accesskey => "n", -title => "Alt-n"}, "next");
6025                 $paging_nav .= " &sdot; $next_link";
6026         } else {
6027                 $paging_nav .= " &sdot; next";
6028         }
6029
6030         git_header_html();
6031         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
6032         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6033         git_print_page_path($file_name, $ftype, $hash_base);
6034
6035         git_history_body(\@commitlist, 0, 99,
6036                          $refs, $hash_base, $ftype, $next_link);
6037
6038         git_footer_html();
6039 }
6040
6041 sub git_search {
6042         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6043         if (!defined $searchtext) {
6044                 die_error(400, "Text field is empty");
6045         }
6046         if (!defined $hash) {
6047                 $hash = git_get_head_hash($project);
6048         }
6049         my %co = parse_commit($hash);
6050         if (!%co) {
6051                 die_error(404, "Unknown commit object");
6052         }
6053         if (!defined $page) {
6054                 $page = 0;
6055         }
6056
6057         $searchtype ||= 'commit';
6058         if ($searchtype eq 'pickaxe') {
6059                 # pickaxe may take all resources of your box and run for several minutes
6060                 # with every query - so decide by yourself how public you make this feature
6061                 gitweb_check_feature('pickaxe')
6062                     or die_error(403, "Pickaxe is disabled");
6063         }
6064         if ($searchtype eq 'grep') {
6065                 gitweb_check_feature('grep')[0]
6066                     or die_error(403, "Grep is disabled");
6067         }
6068
6069         git_header_html();
6070
6071         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6072                 my $greptype;
6073                 if ($searchtype eq 'commit') {
6074                         $greptype = "--grep=";
6075                 } elsif ($searchtype eq 'author') {
6076                         $greptype = "--author=";
6077                 } elsif ($searchtype eq 'committer') {
6078                         $greptype = "--committer=";
6079                 }
6080                 $greptype .= $searchtext;
6081                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6082                                                $greptype, '--regexp-ignore-case',
6083                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6084
6085                 my $paging_nav = '';
6086                 if ($page > 0) {
6087                         $paging_nav .=
6088                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6089                                                        searchtext=>$searchtext,
6090                                                        searchtype=>$searchtype)},
6091                                         "first");
6092                         $paging_nav .= " &sdot; " .
6093                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6094                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6095                 } else {
6096                         $paging_nav .= "first";
6097                         $paging_nav .= " &sdot; prev";
6098                 }
6099                 my $next_link = '';
6100                 if ($#commitlist >= 100) {
6101                         $next_link =
6102                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6103                                          -accesskey => "n", -title => "Alt-n"}, "next");
6104                         $paging_nav .= " &sdot; $next_link";
6105                 } else {
6106                         $paging_nav .= " &sdot; next";
6107                 }
6108
6109                 if ($#commitlist >= 100) {
6110                 }
6111
6112                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6113                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6114                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6115         }
6116
6117         if ($searchtype eq 'pickaxe') {
6118                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6119                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6120
6121                 print "<table class=\"pickaxe search\">\n";
6122                 my $alternate = 1;
6123                 local $/ = "\n";
6124                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6125                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6126                         ($search_use_regexp ? '--pickaxe-regex' : ());
6127                 undef %co;
6128                 my @files;
6129                 while (my $line = <$fd>) {
6130                         chomp $line;
6131                         next unless $line;
6132
6133                         my %set = parse_difftree_raw_line($line);
6134                         if (defined $set{'commit'}) {
6135                                 # finish previous commit
6136                                 if (%co) {
6137                                         print "</td>\n" .
6138                                               "<td class=\"link\">" .
6139                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6140                                               " | " .
6141                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6142                                         print "</td>\n" .
6143                                               "</tr>\n";
6144                                 }
6145
6146                                 if ($alternate) {
6147                                         print "<tr class=\"dark\">\n";
6148                                 } else {
6149                                         print "<tr class=\"light\">\n";
6150                                 }
6151                                 $alternate ^= 1;
6152                                 %co = parse_commit($set{'commit'});
6153                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6154                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6155                                       "<td><i>$author</i></td>\n" .
6156                                       "<td>" .
6157                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6158                                               -class => "list subject"},
6159                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6160                         } elsif (defined $set{'to_id'}) {
6161                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6162
6163                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6164                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6165                                               -class => "list"},
6166                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6167                                       "<br/>\n";
6168                         }
6169                 }
6170                 close $fd;
6171
6172                 # finish last commit (warning: repetition!)
6173                 if (%co) {
6174                         print "</td>\n" .
6175                               "<td class=\"link\">" .
6176                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6177                               " | " .
6178                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6179                         print "</td>\n" .
6180                               "</tr>\n";
6181                 }
6182
6183                 print "</table>\n";
6184         }
6185
6186         if ($searchtype eq 'grep') {
6187                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6188                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6189
6190                 print "<table class=\"grep_search\">\n";
6191                 my $alternate = 1;
6192                 my $matches = 0;
6193                 local $/ = "\n";
6194                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6195                         $search_use_regexp ? ('-E', '-i') : '-F',
6196                         $searchtext, $co{'tree'};
6197                 my $lastfile = '';
6198                 while (my $line = <$fd>) {
6199                         chomp $line;
6200                         my ($file, $lno, $ltext, $binary);
6201                         last if ($matches++ > 1000);
6202                         if ($line =~ /^Binary file (.+) matches$/) {
6203                                 $file = $1;
6204                                 $binary = 1;
6205                         } else {
6206                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6207                         }
6208                         if ($file ne $lastfile) {
6209                                 $lastfile and print "</td></tr>\n";
6210                                 if ($alternate++) {
6211                                         print "<tr class=\"dark\">\n";
6212                                 } else {
6213                                         print "<tr class=\"light\">\n";
6214                                 }
6215                                 print "<td class=\"list\">".
6216                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6217                                                                file_name=>"$file"),
6218                                                 -class => "list"}, esc_path($file));
6219                                 print "</td><td>\n";
6220                                 $lastfile = $file;
6221                         }
6222                         if ($binary) {
6223                                 print "<div class=\"binary\">Binary file</div>\n";
6224                         } else {
6225                                 $ltext = untabify($ltext);
6226                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6227                                         $ltext = esc_html($1, -nbsp=>1);
6228                                         $ltext .= '<span class="match">';
6229                                         $ltext .= esc_html($2, -nbsp=>1);
6230                                         $ltext .= '</span>';
6231                                         $ltext .= esc_html($3, -nbsp=>1);
6232                                 } else {
6233                                         $ltext = esc_html($ltext, -nbsp=>1);
6234                                 }
6235                                 print "<div class=\"pre\">" .
6236                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6237                                                                file_name=>"$file").'#l'.$lno,
6238                                                 -class => "linenr"}, sprintf('%4i', $lno))
6239                                         . ' ' .  $ltext . "</div>\n";
6240                         }
6241                 }
6242                 if ($lastfile) {
6243                         print "</td></tr>\n";
6244                         if ($matches > 1000) {
6245                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6246                         }
6247                 } else {
6248                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6249                 }
6250                 close $fd;
6251
6252                 print "</table>\n";
6253         }
6254         git_footer_html();
6255 }
6256
6257 sub git_search_help {
6258         git_header_html();
6259         git_print_page_nav('','', $hash,$hash,$hash);
6260         print <<EOT;
6261 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6262 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6263 the pattern entered is recognized as the POSIX extended
6264 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6265 insensitive).</p>
6266 <dl>
6267 <dt><b>commit</b></dt>
6268 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6269 EOT
6270         my $have_grep = gitweb_check_feature('grep');
6271         if ($have_grep) {
6272                 print <<EOT;
6273 <dt><b>grep</b></dt>
6274 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6275     a different one) are searched for the given pattern. On large trees, this search can take
6276 a while and put some strain on the server, so please use it with some consideration. Note that
6277 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6278 case-sensitive.</dd>
6279 EOT
6280         }
6281         print <<EOT;
6282 <dt><b>author</b></dt>
6283 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6284 <dt><b>committer</b></dt>
6285 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6286 EOT
6287         my $have_pickaxe = gitweb_check_feature('pickaxe');
6288         if ($have_pickaxe) {
6289                 print <<EOT;
6290 <dt><b>pickaxe</b></dt>
6291 <dd>All commits that caused the string to appear or disappear from any file (changes that
6292 added, removed or "modified" the string) will be listed. This search can take a while and
6293 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6294 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6295 EOT
6296         }
6297         print "</dl>\n";
6298         git_footer_html();
6299 }
6300
6301 sub git_shortlog {
6302         my $head = git_get_head_hash($project);
6303         if (!defined $hash) {
6304                 $hash = $head;
6305         }
6306         if (!defined $page) {
6307                 $page = 0;
6308         }
6309         my $refs = git_get_references();
6310
6311         my $commit_hash = $hash;
6312         if (defined $hash_parent) {
6313                 $commit_hash = "$hash_parent..$hash";
6314         }
6315         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6316
6317         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6318         my $next_link = '';
6319         if ($#commitlist >= 100) {
6320                 $next_link =
6321                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6322                                  -accesskey => "n", -title => "Alt-n"}, "next");
6323         }
6324         my $patch_max = gitweb_check_feature('patches');
6325         if ($patch_max) {
6326                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6327                         $paging_nav .= " &sdot; " .
6328                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6329                                         "patches");
6330                 }
6331         }
6332
6333         git_header_html();
6334         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6335         git_print_header_div('summary', $project);
6336
6337         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6338
6339         git_footer_html();
6340 }
6341
6342 ## ......................................................................
6343 ## feeds (RSS, Atom; OPML)
6344
6345 sub git_feed {
6346         my $format = shift || 'atom';
6347         my $have_blame = gitweb_check_feature('blame');
6348
6349         # Atom: http://www.atomenabled.org/developers/syndication/
6350         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6351         if ($format ne 'rss' && $format ne 'atom') {
6352                 die_error(400, "Unknown web feed format");
6353         }
6354
6355         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6356         my $head = $hash || 'HEAD';
6357         my @commitlist = parse_commits($head, 150, 0, $file_name);
6358
6359         my %latest_commit;
6360         my %latest_date;
6361         my $content_type = "application/$format+xml";
6362         if (defined $cgi->http('HTTP_ACCEPT') &&
6363                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6364                 # browser (feed reader) prefers text/xml
6365                 $content_type = 'text/xml';
6366         }
6367         if (defined($commitlist[0])) {
6368                 %latest_commit = %{$commitlist[0]};
6369                 my $latest_epoch = $latest_commit{'committer_epoch'};
6370                 %latest_date   = parse_date($latest_epoch);
6371                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6372                 if (defined $if_modified) {
6373                         my $since;
6374                         if (eval { require HTTP::Date; 1; }) {
6375                                 $since = HTTP::Date::str2time($if_modified);
6376                         } elsif (eval { require Time::ParseDate; 1; }) {
6377                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6378                         }
6379                         if (defined $since && $latest_epoch <= $since) {
6380                                 print $cgi->header(
6381                                         -type => $content_type,
6382                                         -charset => 'utf-8',
6383                                         -last_modified => $latest_date{'rfc2822'},
6384                                         -status => '304 Not Modified');
6385                                 return;
6386                         }
6387                 }
6388                 print $cgi->header(
6389                         -type => $content_type,
6390                         -charset => 'utf-8',
6391                         -last_modified => $latest_date{'rfc2822'});
6392         } else {
6393                 print $cgi->header(
6394                         -type => $content_type,
6395                         -charset => 'utf-8');
6396         }
6397
6398         # Optimization: skip generating the body if client asks only
6399         # for Last-Modified date.
6400         return if ($cgi->request_method() eq 'HEAD');
6401
6402         # header variables
6403         my $title = "$site_name - $project/$action";
6404         my $feed_type = 'log';
6405         if (defined $hash) {
6406                 $title .= " - '$hash'";
6407                 $feed_type = 'branch log';
6408                 if (defined $file_name) {
6409                         $title .= " :: $file_name";
6410                         $feed_type = 'history';
6411                 }
6412         } elsif (defined $file_name) {
6413                 $title .= " - $file_name";
6414                 $feed_type = 'history';
6415         }
6416         $title .= " $feed_type";
6417         my $descr = git_get_project_description($project);
6418         if (defined $descr) {
6419                 $descr = esc_html($descr);
6420         } else {
6421                 $descr = "$project " .
6422                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6423                          " feed";
6424         }
6425         my $owner = git_get_project_owner($project);
6426         $owner = esc_html($owner);
6427
6428         #header
6429         my $alt_url;
6430         if (defined $file_name) {
6431                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6432         } elsif (defined $hash) {
6433                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6434         } else {
6435                 $alt_url = href(-full=>1, action=>"summary");
6436         }
6437         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6438         if ($format eq 'rss') {
6439                 print <<XML;
6440 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6441 <channel>
6442 XML
6443                 print "<title>$title</title>\n" .
6444                       "<link>$alt_url</link>\n" .
6445                       "<description>$descr</description>\n" .
6446                       "<language>en</language>\n" .
6447                       # project owner is responsible for 'editorial' content
6448                       "<managingEditor>$owner</managingEditor>\n";
6449                 if (defined $logo || defined $favicon) {
6450                         # prefer the logo to the favicon, since RSS
6451                         # doesn't allow both
6452                         my $img = esc_url($logo || $favicon);
6453                         print "<image>\n" .
6454                               "<url>$img</url>\n" .
6455                               "<title>$title</title>\n" .
6456                               "<link>$alt_url</link>\n" .
6457                               "</image>\n";
6458                 }
6459                 if (%latest_date) {
6460                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6461                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6462                 }
6463                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6464         } elsif ($format eq 'atom') {
6465                 print <<XML;
6466 <feed xmlns="http://www.w3.org/2005/Atom">
6467 XML
6468                 print "<title>$title</title>\n" .
6469                       "<subtitle>$descr</subtitle>\n" .
6470                       '<link rel="alternate" type="text/html" href="' .
6471                       $alt_url . '" />' . "\n" .
6472                       '<link rel="self" type="' . $content_type . '" href="' .
6473                       $cgi->self_url() . '" />' . "\n" .
6474                       "<id>" . href(-full=>1) . "</id>\n" .
6475                       # use project owner for feed author
6476                       "<author><name>$owner</name></author>\n";
6477                 if (defined $favicon) {
6478                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6479                 }
6480                 if (defined $logo_url) {
6481                         # not twice as wide as tall: 72 x 27 pixels
6482                         print "<logo>" . esc_url($logo) . "</logo>\n";
6483                 }
6484                 if (! %latest_date) {
6485                         # dummy date to keep the feed valid until commits trickle in:
6486                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6487                 } else {
6488                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6489                 }
6490                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6491         }
6492
6493         # contents
6494         for (my $i = 0; $i <= $#commitlist; $i++) {
6495                 my %co = %{$commitlist[$i]};
6496                 my $commit = $co{'id'};
6497                 # we read 150, we always show 30 and the ones more recent than 48 hours
6498                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6499                         last;
6500                 }
6501                 my %cd = parse_date($co{'author_epoch'});
6502
6503                 # get list of changed files
6504                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6505                         $co{'parent'} || "--root",
6506                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6507                         or next;
6508                 my @difftree = map { chomp; $_ } <$fd>;
6509                 close $fd
6510                         or next;
6511
6512                 # print element (entry, item)
6513                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6514                 if ($format eq 'rss') {
6515                         print "<item>\n" .
6516                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6517                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6518                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6519                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6520                               "<link>$co_url</link>\n" .
6521                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6522                               "<content:encoded>" .
6523                               "<![CDATA[\n";
6524                 } elsif ($format eq 'atom') {
6525                         print "<entry>\n" .
6526                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6527                               "<updated>$cd{'iso-8601'}</updated>\n" .
6528                               "<author>\n" .
6529                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6530                         if ($co{'author_email'}) {
6531                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6532                         }
6533                         print "</author>\n" .
6534                               # use committer for contributor
6535                               "<contributor>\n" .
6536                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6537                         if ($co{'committer_email'}) {
6538                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6539                         }
6540                         print "</contributor>\n" .
6541                               "<published>$cd{'iso-8601'}</published>\n" .
6542                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6543                               "<id>$co_url</id>\n" .
6544                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6545                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6546                 }
6547                 my $comment = $co{'comment'};
6548                 print "<pre>\n";
6549                 foreach my $line (@$comment) {
6550                         $line = esc_html($line);
6551                         print "$line\n";
6552                 }
6553                 print "</pre><ul>\n";
6554                 foreach my $difftree_line (@difftree) {
6555                         my %difftree = parse_difftree_raw_line($difftree_line);
6556                         next if !$difftree{'from_id'};
6557
6558                         my $file = $difftree{'file'} || $difftree{'to_file'};
6559
6560                         print "<li>" .
6561                               "[" .
6562                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6563                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6564                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6565                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6566                                       -title => "diff"}, 'D');
6567                         if ($have_blame) {
6568                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6569                                                              file_name=>$file, hash_base=>$commit),
6570                                               -title => "blame"}, 'B');
6571                         }
6572                         # if this is not a feed of a file history
6573                         if (!defined $file_name || $file_name ne $file) {
6574                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6575                                                              file_name=>$file, hash=>$commit),
6576                                               -title => "history"}, 'H');
6577                         }
6578                         $file = esc_path($file);
6579                         print "] ".
6580                               "$file</li>\n";
6581                 }
6582                 if ($format eq 'rss') {
6583                         print "</ul>]]>\n" .
6584                               "</content:encoded>\n" .
6585                               "</item>\n";
6586                 } elsif ($format eq 'atom') {
6587                         print "</ul>\n</div>\n" .
6588                               "</content>\n" .
6589                               "</entry>\n";
6590                 }
6591         }
6592
6593         # end of feed
6594         if ($format eq 'rss') {
6595                 print "</channel>\n</rss>\n";
6596         } elsif ($format eq 'atom') {
6597                 print "</feed>\n";
6598         }
6599 }
6600
6601 sub git_rss {
6602         git_feed('rss');
6603 }
6604
6605 sub git_atom {
6606         git_feed('atom');
6607 }
6608
6609 sub git_opml {
6610         my @list = git_get_projects_list();
6611
6612         print $cgi->header(
6613                 -type => 'text/xml',
6614                 -charset => 'utf-8',
6615                 -content_disposition => 'inline; filename="opml.xml"');
6616
6617         print <<XML;
6618 <?xml version="1.0" encoding="utf-8"?>
6619 <opml version="1.0">
6620 <head>
6621   <title>$site_name OPML Export</title>
6622 </head>
6623 <body>
6624 <outline text="git RSS feeds">
6625 XML
6626
6627         foreach my $pr (@list) {
6628                 my %proj = %$pr;
6629                 my $head = git_get_head_hash($proj{'path'});
6630                 if (!defined $head) {
6631                         next;
6632                 }
6633                 $git_dir = "$projectroot/$proj{'path'}";
6634                 my %co = parse_commit($head);
6635                 if (!%co) {
6636                         next;
6637                 }
6638
6639                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6640                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6641                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6642                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6643         }
6644         print <<XML;
6645 </outline>
6646 </body>
6647 </opml>
6648 XML
6649 }