gitweb/gitweb.perl

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