index.cgi

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 our $t0 = [ gettimeofday() ];
  24 our $number_of_git_cmds = 0;
  25
  26 BEGIN {
  27         CGI->compile() if $ENV{'MOD_PERL'};
  28 }
  29
  30 our $version = "1.8.1.2-Stricted";
  31
  32 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  33 sub evaluate_uri {
  34         our $cgi;
  35
  36         our $my_url = $cgi->url();
  37         our $my_uri = $cgi->url(-absolute => 1);
  38
  39         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  40         # needed and used only for URLs with nonempty PATH_INFO
  41         our $base_url = $my_url;
  42
  43         # When the script is used as DirectoryIndex, the URL does not contain the name
  44         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  45         # have to do it ourselves. We make $path_info global because it's also used
  46         # later on.
  47         #
  48         # Another issue with the script being the DirectoryIndex is that the resulting
  49         # $my_url data is not the full script URL: this is good, because we want
  50         # generated links to keep implying the script name if it wasn't explicitly
  51         # indicated in the URL we're handling, but it means that $my_url cannot be used
  52         # as base URL.
  53         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  54         # to build the base URL ourselves:
  55         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  56         if ($path_info) {
  57                 # $path_info has already been URL-decoded by the web server, but
  58                 # $my_url and $my_uri have not. URL-decode them so we can properly
  59                 # strip $path_info.
  60                 $my_url = unescape($my_url);
  61                 $my_uri = unescape($my_uri);
  62                 if ($my_url =~ s,\Q$path_info\E$,, &&
  63                     $my_uri =~ s,\Q$path_info\E$,, &&
  64                     defined $ENV{'SCRIPT_NAME'}) {
  65                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  66                 }
  67         }
  68
  69         # target of the home link on top of all pages
  70         our $home_link = $my_uri || "/";
  71 }
  72
  73 # core git executable to use
  74 # this can just be "git" if your webserver has a sensible PATH
  75 our $GIT = "/usr/bin/git";
  76
  77 # absolute fs-path which will be prepended to the project path
  78 #our $projectroot = "/pub/scm";
  79 our $projectroot = "/pub/git";
  80
  81 # fs traversing limit for getting project list
  82 # the number is relative to the projectroot
  83 our $project_maxdepth = 2007;
  84
  85 # string of the home link on top of all pages
  86 our $home_link_str = "projects";
  87
  88 # name of your site or organization to appear in page titles
  89 # replace this with something more descriptive for clearer bookmarks
  90 our $site_name = ""
  91                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  92
  93 # html snippet to include in the <head> section of each page
  94 our $site_html_head_string = "";
  95 # filename of html text to include at top of each page
  96 our $site_header = "";
  97 # html text to include at home page
  98 our $home_text = "indextext.html";
  99 # filename of html text to include at bottom of each page
 100 our $site_footer = "";
 101
 102 # URI of stylesheets
 103 our @stylesheets = ("static/gitweb.css");
 104 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 105 our $stylesheet = undef;
 106 # URI of GIT logo (72x27 size)
 107 our $logo = "static/git-logo.png";
 108 # URI of GIT favicon, assumed to be image/png type
 109 our $favicon = "static/git-favicon.png";
 110 # URI of gitweb.js (JavaScript code for gitweb)
 111 our $javascript = "static/gitweb.js";
 112
 113 # URI and label (title) of GIT logo link
 114 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 115 #our $logo_label = "git documentation";
 116 our $logo_url = "http://git-scm.com/";
 117 our $logo_label = "git homepage";
 118 # URI and label (title) of footer
 119 our $footer_url = "http://git-scm.com/";
 120 our $footer_label = "git homepage";
 121 # source of projects list
 122 our $projects_list = "";
 123
 124 # the width (in characters) of the projects list "Description" column
 125 our $projects_list_description_width = 25;
 126
 127 # group projects by category on the projects list
 128 # (enabled if this variable evaluates to true)
 129 our $projects_list_group_categories = 0;
 130
 131 # default category if none specified
 132 # (leave the empty string for no category)
 133 our $project_list_default_category = "";
 134
 135 # default order of projects list
 136 # valid values are none, project, descr, owner, and age
 137 our $default_projects_order = "project";
 138
 139 # show repository only if this file exists
 140 # (only effective if this variable evaluates to true)
 141 our $export_ok = "";
 142
 143 # don't generate age column on the projects list page
 144 our $omit_age_column = 0;
 145
 146 # don't generate information about owners of repositories
 147 our $omit_owner=0;
 148
 149 # show repository only if this subroutine returns true
 150 # when given the path to the project, for example:
 151 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 152 our $export_auth_hook = undef;
 153
 154 # only allow viewing of repositories also shown on the overview page
 155 our $strict_export = "";
 156
 157 # list of git base URLs used for URL to where fetch project from,
 158 # i.e. full URL is "$git_base_url/$project"
 159 our @git_base_url_list = grep { $_ ne '' } ("");
 160
 161 # default blob_plain mimetype and default charset for text/plain blob
 162 our $default_blob_plain_mimetype = 'text/plain';
 163 our $default_text_plain_charset  = undef;
 164
 165 # file to use for guessing MIME types before trying /etc/mime.types
 166 # (relative to the current git repository)
 167 our $mimetypes_file = undef;
 168
 169 # assume this charset if line contains non-UTF-8 characters;
 170 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 171 # for which encoding all byte sequences are valid, for example
 172 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 173 # could be even 'utf-8' for the old behavior)
 174 our $fallback_encoding = 'latin1';
 175
 176 # rename detection options for git-diff and git-diff-tree
 177 # - default is '-M', with the cost proportional to
 178 #   (number of removed files) * (number of new files).
 179 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 180 #   (number of changed files + number of removed files) * (number of new files)
 181 # - even more costly is '-C', '--find-copies-harder' with cost
 182 #   (number of files in the original tree) * (number of new files)
 183 # - one might want to include '-B' option, e.g. '-B', '-M'
 184 our @diff_opts = ('-M'); # taken from git_commit
 185
 186 # Disables features that would allow repository owners to inject script into
 187 # the gitweb domain.
 188 our $prevent_xss = 0;
 189
 190 # Path to the highlight executable to use (must be the one from
 191 # http://www.andre-simon.de due to assumptions about parameters and output).
 192 # Useful if highlight is not installed on your webserver's PATH.
 193 # [Default: highlight]
 194 our $highlight_bin = "highlight";
 195
 196 # information about snapshot formats that gitweb is capable of serving
 197 our %known_snapshot_formats = (
 198         # name => {
 199         #       'display' => display name,
 200         #       'type' => mime type,
 201         #       'suffix' => filename suffix,
 202         #       'format' => --format for git-archive,
 203         #       'compressor' => [compressor command and arguments]
 204         #                       (array reference, optional)
 205         #       'disabled' => boolean (optional)}
 206         #
 207         'tgz' => {
 208                 'display' => 'tar.gz',
 209                 'type' => 'application/x-gzip',
 210                 'suffix' => '.tar.gz',
 211                 'format' => 'tar',
 212                 'compressor' => ['gzip', '-n']},
 213
 214         'tbz2' => {
 215                 'display' => 'tar.bz2',
 216                 'type' => 'application/x-bzip2',
 217                 'suffix' => '.tar.bz2',
 218                 'format' => 'tar',
 219                 'compressor' => ['bzip2']},
 220
 221         'txz' => {
 222                 'display' => 'tar.xz',
 223                 'type' => 'application/x-xz',
 224                 'suffix' => '.tar.xz',
 225                 'format' => 'tar',
 226                 'compressor' => ['xz'],
 227                 'disabled' => 1},
 228
 229         'zip' => {
 230                 'display' => 'zip',
 231                 'type' => 'application/x-zip',
 232                 'suffix' => '.zip',
 233                 'format' => 'zip'},
 234 );
 235
 236 # Aliases so we understand old gitweb.snapshot values in repository
 237 # configuration.
 238 our %known_snapshot_format_aliases = (
 239         'gzip'  => 'tgz',
 240         'bzip2' => 'tbz2',
 241         'xz'    => 'txz',
 242
 243         # backward compatibility: legacy gitweb config support
 244         'x-gzip' => undef, 'gz' => undef,
 245         'x-bzip2' => undef, 'bz2' => undef,
 246         'x-zip' => undef, '' => undef,
 247 );
 248
 249 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 250 # are changed, it may be appropriate to change these values too via
 251 # $GITWEB_CONFIG.
 252 our %avatar_size = (
 253         'default' => 16,
 254         'double'  => 32
 255 );
 256
 257 # Used to set the maximum load that we will still respond to gitweb queries.
 258 # If server load exceed this value then return "503 server busy" error.
 259 # If gitweb cannot determined server load, it is taken to be 0.
 260 # Leave it undefined (or set to 'undef') to turn off load checking.
 261 our $maxload = 300;
 262
 263 # configuration for 'highlight' (http://www.andre-simon.de/)
 264 # match by basename
 265 our %highlight_basename = (
 266         #'Program' => 'py',
 267         #'Library' => 'py',
 268         'SConstruct' => 'py', # SCons equivalent of Makefile
 269         'Makefile' => 'make',
 270 );
 271 # match by extension
 272 our %highlight_ext = (
 273         # main extensions, defining name of syntax;
 274         # see files in /usr/share/highlight/langDefs/ directory
 275         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 276         # alternate extensions, see /etc/highlight/filetypes.conf
 277         (map { $_ => 'c'   } qw(c h)),
 278         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 279         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 280         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 281         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 282         (map { $_ => 'make'} qw(make mak mk)),
 283         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 284 );
 285
 286 # You define site-wide feature defaults here; override them with
 287 # $GITWEB_CONFIG as necessary.
 288 our %feature = (
 289         # feature => {
 290         #       'sub' => feature-sub (subroutine),
 291         #       'override' => allow-override (boolean),
 292         #       'default' => [ default options...] (array reference)}
 293         #
 294         # if feature is overridable (it means that allow-override has true value),
 295         # then feature-sub will be called with default options as parameters;
 296         # return value of feature-sub indicates if to enable specified feature
 297         #
 298         # if there is no 'sub' key (no feature-sub), then feature cannot be
 299         # overridden
 300         #
 301         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 302         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 303         # is enabled
 304
 305         # Enable the 'blame' blob view, showing the last commit that modified
 306         # each line in the file. This can be very CPU-intensive.
 307
 308         # To enable system wide have in $GITWEB_CONFIG
 309         # $feature{'blame'}{'default'} = [1];
 310         # To have project specific config enable override in $GITWEB_CONFIG
 311         # $feature{'blame'}{'override'} = 1;
 312         # and in project config gitweb.blame = 0|1;
 313         'blame' => {
 314                 'sub' => sub { feature_bool('blame', @_) },
 315                 'override' => 0,
 316                 'default' => [0]},
 317
 318         # Enable the 'snapshot' link, providing a compressed archive of any
 319         # tree. This can potentially generate high traffic if you have large
 320         # project.
 321
 322         # Value is a list of formats defined in %known_snapshot_formats that
 323         # you wish to offer.
 324         # To disable system wide have in $GITWEB_CONFIG
 325         # $feature{'snapshot'}{'default'} = [];
 326         # To have project specific config enable override in $GITWEB_CONFIG
 327         # $feature{'snapshot'}{'override'} = 1;
 328         # and in project config, a comma-separated list of formats or "none"
 329         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 330         'snapshot' => {
 331                 'sub' => \&feature_snapshot,
 332                 'override' => 0,
 333                 'default' => ['tgz']},
 334
 335         # Enable text search, which will list the commits which match author,
 336         # committer or commit text to a given string.  Enabled by default.
 337         # Project specific override is not supported.
 338         #
 339         # Note that this controls all search features, which means that if
 340         # it is disabled, then 'grep' and 'pickaxe' search would also be
 341         # disabled.
 342         'search' => {
 343                 'override' => 0,
 344                 'default' => [1]},
 345
 346         # Enable grep search, which will list the files in currently selected
 347         # tree containing the given string. Enabled by default. This can be
 348         # potentially CPU-intensive, of course.
 349         # Note that you need to have 'search' feature enabled too.
 350
 351         # To enable system wide have in $GITWEB_CONFIG
 352         # $feature{'grep'}{'default'} = [1];
 353         # To have project specific config enable override in $GITWEB_CONFIG
 354         # $feature{'grep'}{'override'} = 1;
 355         # and in project config gitweb.grep = 0|1;
 356         'grep' => {
 357                 'sub' => sub { feature_bool('grep', @_) },
 358                 'override' => 0,
 359                 'default' => [1]},
 360
 361         # Enable the pickaxe search, which will list the commits that modified
 362         # a given string in a file. This can be practical and quite faster
 363         # alternative to 'blame', but still potentially CPU-intensive.
 364         # Note that you need to have 'search' feature enabled too.
 365
 366         # To enable system wide have in $GITWEB_CONFIG
 367         # $feature{'pickaxe'}{'default'} = [1];
 368         # To have project specific config enable override in $GITWEB_CONFIG
 369         # $feature{'pickaxe'}{'override'} = 1;
 370         # and in project config gitweb.pickaxe = 0|1;
 371         'pickaxe' => {
 372                 'sub' => sub { feature_bool('pickaxe', @_) },
 373                 'override' => 0,
 374                 'default' => [1]},
 375
 376         # Enable showing size of blobs in a 'tree' view, in a separate
 377         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 378
 379         # To disable system wide have in $GITWEB_CONFIG
 380         # $feature{'show-sizes'}{'default'} = [0];
 381         # To have project specific config enable override in $GITWEB_CONFIG
 382         # $feature{'show-sizes'}{'override'} = 1;
 383         # and in project config gitweb.showsizes = 0|1;
 384         'show-sizes' => {
 385                 'sub' => sub { feature_bool('showsizes', @_) },
 386                 'override' => 0,
 387                 'default' => [1]},
 388
 389         # Make gitweb use an alternative format of the URLs which can be
 390         # more readable and natural-looking: project name is embedded
 391         # directly in the path and the query string contains other
 392         # auxiliary information. All gitweb installations recognize
 393         # URL in either format; this configures in which formats gitweb
 394         # generates links.
 395
 396         # To enable system wide have in $GITWEB_CONFIG
 397         # $feature{'pathinfo'}{'default'} = [1];
 398         # Project specific override is not supported.
 399
 400         # Note that you will need to change the default location of CSS,
 401         # favicon, logo and possibly other files to an absolute URL. Also,
 402         # if gitweb.cgi serves as your indexfile, you will need to force
 403         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 404         'pathinfo' => {
 405                 'override' => 0,
 406                 'default' => [0]},
 407
 408         # Make gitweb consider projects in project root subdirectories
 409         # to be forks of existing projects. Given project $projname.git,
 410         # projects matching $projname/*.git will not be shown in the main
 411         # projects list, instead a '+' mark will be added to $projname
 412         # there and a 'forks' view will be enabled for the project, listing
 413         # all the forks. If project list is taken from a file, forks have
 414         # to be listed after the main project.
 415
 416         # To enable system wide have in $GITWEB_CONFIG
 417         # $feature{'forks'}{'default'} = [1];
 418         # Project specific override is not supported.
 419         'forks' => {
 420                 'override' => 0,
 421                 'default' => [0]},
 422
 423         # Insert custom links to the action bar of all project pages.
 424         # This enables you mainly to link to third-party scripts integrating
 425         # into gitweb; e.g. git-browser for graphical history representation
 426         # or custom web-based repository administration interface.
 427
 428         # The 'default' value consists of a list of triplets in the form
 429         # (label, link, position) where position is the label after which
 430         # to insert the link and link is a format string where %n expands
 431         # to the project name, %f to the project path within the filesystem,
 432         # %h to the current hash (h gitweb parameter) and %b to the current
 433         # hash base (hb gitweb parameter); %% expands to %.
 434
 435         # To enable system wide have in $GITWEB_CONFIG e.g.
 436         # $feature{'actions'}{'default'} = [('graphiclog',
 437         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 438         # Project specific override is not supported.
 439         'actions' => {
 440                 'override' => 0,
 441                 'default' => []},
 442
 443         # Allow gitweb scan project content tags of project repository,
 444         # and display the popular Web 2.0-ish "tag cloud" near the projects
 445         # list.  Note that this is something COMPLETELY different from the
 446         # normal Git tags.
 447
 448         # gitweb by itself can show existing tags, but it does not handle
 449         # tagging itself; you need to do it externally, outside gitweb.
 450         # The format is described in git_get_project_ctags() subroutine.
 451         # You may want to install the HTML::TagCloud Perl module to get
 452         # a pretty tag cloud instead of just a list of tags.
 453
 454         # To enable system wide have in $GITWEB_CONFIG
 455         # $feature{'ctags'}{'default'} = [1];
 456         # Project specific override is not supported.
 457
 458         # In the future whether ctags editing is enabled might depend
 459         # on the value, but using 1 should always mean no editing of ctags.
 460         'ctags' => {
 461                 'override' => 0,
 462                 'default' => [0]},
 463
 464         # The maximum number of patches in a patchset generated in patch
 465         # view. Set this to 0 or undef to disable patch view, or to a
 466         # negative number to remove any limit.
 467
 468         # To disable system wide have in $GITWEB_CONFIG
 469         # $feature{'patches'}{'default'} = [0];
 470         # To have project specific config enable override in $GITWEB_CONFIG
 471         # $feature{'patches'}{'override'} = 1;
 472         # and in project config gitweb.patches = 0|n;
 473         # where n is the maximum number of patches allowed in a patchset.
 474         'patches' => {
 475                 'sub' => \&feature_patches,
 476                 'override' => 0,
 477                 'default' => [16]},
 478
 479         # Avatar support. When this feature is enabled, views such as
 480         # shortlog or commit will display an avatar associated with
 481         # the email of the committer(s) and/or author(s).
 482
 483         # Currently available providers are gravatar and picon.
 484         # If an unknown provider is specified, the feature is disabled.
 485
 486         # Gravatar depends on Digest::MD5.
 487         # Picon currently relies on the indiana.edu database.
 488
 489         # To enable system wide have in $GITWEB_CONFIG
 490         # $feature{'avatar'}{'default'} = ['<provider>'];
 491         # where <provider> is either gravatar or picon.
 492         # To have project specific config enable override in $GITWEB_CONFIG
 493         # $feature{'avatar'}{'override'} = 1;
 494         # and in project config gitweb.avatar = <provider>;
 495         'avatar' => {
 496                 'sub' => \&feature_avatar,
 497                 'override' => 0,
 498                 'default' => ['']},
 499
 500         # Enable displaying how much time and how many git commands
 501         # it took to generate and display page.  Disabled by default.
 502         # Project specific override is not supported.
 503         'timed' => {
 504                 'override' => 0,
 505                 'default' => [0]},
 506
 507         # Enable turning some links into links to actions which require
 508         # JavaScript to run (like 'blame_incremental').  Not enabled by
 509         # default.  Project specific override is currently not supported.
 510         'javascript-actions' => {
 511                 'override' => 0,
 512                 'default' => [0]},
 513
 514         # Enable and configure ability to change common timezone for dates
 515         # in gitweb output via JavaScript.  Enabled by default.
 516         # Project specific override is not supported.
 517         'javascript-timezone' => {
 518                 'override' => 0,
 519                 'default' => [
 520                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 521                                      # or undef to turn off this feature
 522                         'gitweb_tz', # name of cookie where to store selected timezone
 523                         'datetime',  # CSS class used to mark up dates for manipulation
 524                 ]},
 525
 526         # Syntax highlighting support. This is based on Daniel Svensson's
 527         # and Sham Chukoury's work in gitweb-xmms2.git.
 528         # It requires the 'highlight' program present in $PATH,
 529         # and therefore is disabled by default.
 530
 531         # To enable system wide have in $GITWEB_CONFIG
 532         # $feature{'highlight'}{'default'} = [1];
 533
 534         'highlight' => {
 535                 'sub' => sub { feature_bool('highlight', @_) },
 536                 'override' => 0,
 537                 'default' => [0]},
 538
 539         # Enable displaying of remote heads in the heads list
 540
 541         # To enable system wide have in $GITWEB_CONFIG
 542         # $feature{'remote_heads'}{'default'} = [1];
 543         # To have project specific config enable override in $GITWEB_CONFIG
 544         # $feature{'remote_heads'}{'override'} = 1;
 545         # and in project config gitweb.remoteheads = 0|1;
 546         'remote_heads' => {
 547                 'sub' => sub { feature_bool('remote_heads', @_) },
 548                 'override' => 0,
 549                 'default' => [0]},
 550 );
 551
 552 sub gitweb_get_feature {
 553         my ($name) = @_;
 554         return unless exists $feature{$name};
 555         my ($sub, $override, @defaults) = (
 556                 $feature{$name}{'sub'},
 557                 $feature{$name}{'override'},
 558                 @{$feature{$name}{'default'}});
 559         # project specific override is possible only if we have project
 560         our $git_dir; # global variable, declared later
 561         if (!$override || !defined $git_dir) {
 562                 return @defaults;
 563         }
 564         if (!defined $sub) {
 565                 warn "feature $name is not overridable";
 566                 return @defaults;
 567         }
 568         return $sub->(@defaults);
 569 }
 570
 571 # A wrapper to check if a given feature is enabled.
 572 # With this, you can say
 573 #
 574 #   my $bool_feat = gitweb_check_feature('bool_feat');
 575 #   gitweb_check_feature('bool_feat') or somecode;
 576 #
 577 # instead of
 578 #
 579 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 580 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 581 #
 582 sub gitweb_check_feature {
 583         return (gitweb_get_feature(@_))[0];
 584 }
 585
 586
 587 sub feature_bool {
 588         my $key = shift;
 589         my ($val) = git_get_project_config($key, '--bool');
 590
 591         if (!defined $val) {
 592                 return ($_[0]);
 593         } elsif ($val eq 'true') {
 594                 return (1);
 595         } elsif ($val eq 'false') {
 596                 return (0);
 597         }
 598 }
 599
 600 sub feature_snapshot {
 601         my (@fmts) = @_;
 602
 603         my ($val) = git_get_project_config('snapshot');
 604
 605         if ($val) {
 606                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 607         }
 608
 609         return @fmts;
 610 }
 611
 612 sub feature_patches {
 613         my @val = (git_get_project_config('patches', '--int'));
 614
 615         if (@val) {
 616                 return @val;
 617         }
 618
 619         return ($_[0]);
 620 }
 621
 622 sub feature_avatar {
 623         my @val = (git_get_project_config('avatar'));
 624
 625         return @val ? @val : @_;
 626 }
 627
 628 # checking HEAD file with -e is fragile if the repository was
 629 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 630 # and then pruned.
 631 sub check_head_link {
 632         my ($dir) = @_;
 633         my $headfile = "$dir/HEAD";
 634         return ((-e $headfile) ||
 635                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 636 }
 637
 638 sub check_export_ok {
 639         my ($dir) = @_;
 640         return (check_head_link($dir) &&
 641                 (!$export_ok || -e "$dir/$export_ok") &&
 642                 (!$export_auth_hook || $export_auth_hook->($dir)));
 643 }
 644
 645 # process alternate names for backward compatibility
 646 # filter out unsupported (unknown) snapshot formats
 647 sub filter_snapshot_fmts {
 648         my @fmts = @_;
 649
 650         @fmts = map {
 651                 exists $known_snapshot_format_aliases{$_} ?
 652                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 653         @fmts = grep {
 654                 exists $known_snapshot_formats{$_} &&
 655                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 656 }
 657
 658 # If it is set to code reference, it is code that it is to be run once per
 659 # request, allowing updating configurations that change with each request,
 660 # while running other code in config file only once.
 661 #
 662 # Otherwise, if it is false then gitweb would process config file only once;
 663 # if it is true then gitweb config would be run for each request.
 664 our $per_request_config = 1;
 665
 666 # read and parse gitweb config file given by its parameter.
 667 # returns true on success, false on recoverable error, allowing
 668 # to chain this subroutine, using first file that exists.
 669 # dies on errors during parsing config file, as it is unrecoverable.
 670 sub read_config_file {
 671         my $filename = shift;
 672         return unless defined $filename;
 673         # die if there are errors parsing config file
 674         if (-e $filename) {
 675                 do $filename;
 676                 die $@ if $@;
 677                 return 1;
 678         }
 679         return;
 680 }
 681
 682 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 683 sub evaluate_gitweb_config {
 684         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "gitweb_config.perl";
 685         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "/etc/gitweb.conf";
 686         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "/etc/gitweb-common.conf";
 687
 688         # Protect agains duplications of file names, to not read config twice.
 689         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 690         # there possibility of duplication of filename there doesn't matter.
 691         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 692         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 693
 694         # Common system-wide settings for convenience.
 695         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 696         read_config_file($GITWEB_CONFIG_COMMON);
 697
 698         # Use first config file that exists.  This means use the per-instance
 699         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 700         read_config_file($GITWEB_CONFIG) and return;
 701         read_config_file($GITWEB_CONFIG_SYSTEM);
 702 }
 703
 704 # Get loadavg of system, to compare against $maxload.
 705 # Currently it requires '/proc/loadavg' present to get loadavg;
 706 # if it is not present it returns 0, which means no load checking.
 707 sub get_loadavg {
 708         if( -e '/proc/loadavg' ){
 709                 open my $fd, '<', '/proc/loadavg'
 710                         or return 0;
 711                 my @load = split(/\s+/, scalar <$fd>);
 712                 close $fd;
 713
 714                 # The first three columns measure CPU and IO utilization of the last one,
 715                 # five, and 10 minute periods.  The fourth column shows the number of
 716                 # currently running processes and the total number of processes in the m/n
 717                 # format.  The last column displays the last process ID used.
 718                 return $load[0] || 0;
 719         }
 720         # additional checks for load average should go here for things that don't export
 721         # /proc/loadavg
 722
 723         return 0;
 724 }
 725
 726 # version of the core git binary
 727 our $git_version;
 728 sub evaluate_git_version {
 729         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 730         $number_of_git_cmds++;
 731 }
 732
 733 sub check_loadavg {
 734         if (defined $maxload && get_loadavg() > $maxload) {
 735                 die_error(503, "The load average on the server is too high");
 736         }
 737 }
 738
 739 # ======================================================================
 740 # input validation and dispatch
 741
 742 # input parameters can be collected from a variety of sources (presently, CGI
 743 # and PATH_INFO), so we define an %input_params hash that collects them all
 744 # together during validation: this allows subsequent uses (e.g. href()) to be
 745 # agnostic of the parameter origin
 746
 747 our %input_params = ();
 748
 749 # input parameters are stored with the long parameter name as key. This will
 750 # also be used in the href subroutine to convert parameters to their CGI
 751 # equivalent, and since the href() usage is the most frequent one, we store
 752 # the name -> CGI key mapping here, instead of the reverse.
 753 #
 754 # XXX: Warning: If you touch this, check the search form for updating,
 755 # too.
 756
 757 our @cgi_param_mapping = (
 758         project => "p",
 759         action => "a",
 760         file_name => "f",
 761         file_parent => "fp",
 762         hash => "h",
 763         hash_parent => "hp",
 764         hash_base => "hb",
 765         hash_parent_base => "hpb",
 766         page => "pg",
 767         order => "o",
 768         searchtext => "s",
 769         searchtype => "st",
 770         snapshot_format => "sf",
 771         extra_options => "opt",
 772         search_use_regexp => "sr",
 773         ctag => "by_tag",
 774         diff_style => "ds",
 775         project_filter => "pf",
 776         # this must be last entry (for manipulation from JavaScript)
 777         javascript => "js"
 778 );
 779 our %cgi_param_mapping = @cgi_param_mapping;
 780
 781 # we will also need to know the possible actions, for validation
 782 our %actions = (
 783         "blame" => \&git_blame,
 784         "blame_incremental" => \&git_blame_incremental,
 785         "blame_data" => \&git_blame_data,
 786         "blobdiff" => \&git_blobdiff,
 787         "blobdiff_plain" => \&git_blobdiff_plain,
 788         "blob" => \&git_blob,
 789         "blob_plain" => \&git_blob_plain,
 790         "commitdiff" => \&git_commitdiff,
 791         "commitdiff_plain" => \&git_commitdiff_plain,
 792         "commit" => \&git_commit,
 793         "forks" => \&git_forks,
 794         "heads" => \&git_heads,
 795         "history" => \&git_history,
 796         "log" => \&git_log,
 797         "patch" => \&git_patch,
 798         "patches" => \&git_patches,
 799         "remotes" => \&git_remotes,
 800         "rss" => \&git_rss,
 801         "atom" => \&git_atom,
 802         "search" => \&git_search,
 803         "search_help" => \&git_search_help,
 804         "shortlog" => \&git_shortlog,
 805         "summary" => \&git_summary,
 806         "tag" => \&git_tag,
 807         "tags" => \&git_tags,
 808         "tree" => \&git_tree,
 809         "snapshot" => \&git_snapshot,
 810         "object" => \&git_object,
 811         # those below don't need $project
 812         "opml" => \&git_opml,
 813         "project_list" => \&git_project_list,
 814         "project_index" => \&git_project_index,
 815 );
 816
 817 # finally, we have the hash of allowed extra_options for the commands that
 818 # allow them
 819 our %allowed_options = (
 820         "--no-merges" => [ qw(rss atom log shortlog history) ],
 821 );
 822
 823 # fill %input_params with the CGI parameters. All values except for 'opt'
 824 # should be single values, but opt can be an array. We should probably
 825 # build an array of parameters that can be multi-valued, but since for the time
 826 # being it's only this one, we just single it out
 827 sub evaluate_query_params {
 828         our $cgi;
 829
 830         while (my ($name, $symbol) = each %cgi_param_mapping) {
 831                 if ($symbol eq 'opt') {
 832                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 833                 } else {
 834                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 835                 }
 836         }
 837 }
 838
 839 # now read PATH_INFO and update the parameter list for missing parameters
 840 sub evaluate_path_info {
 841         return if defined $input_params{'project'};
 842         return if !$path_info;
 843         $path_info =~ s,^/+,,;
 844         return if !$path_info;
 845
 846         # find which part of PATH_INFO is project
 847         my $project = $path_info;
 848         $project =~ s,/+$,,;
 849         while ($project && !check_head_link("$projectroot/$project")) {
 850                 $project =~ s,/*[^/]*$,,;
 851         }
 852         return unless $project;
 853         $input_params{'project'} = $project;
 854
 855         # do not change any parameters if an action is given using the query string
 856         return if $input_params{'action'};
 857         $path_info =~ s,^\Q$project\E/*,,;
 858
 859         # next, check if we have an action
 860         my $action = $path_info;
 861         $action =~ s,/.*$,,;
 862         if (exists $actions{$action}) {
 863                 $path_info =~ s,^$action/*,,;
 864                 $input_params{'action'} = $action;
 865         }
 866
 867         # list of actions that want hash_base instead of hash, but can have no
 868         # pathname (f) parameter
 869         my @wants_base = (
 870                 'tree',
 871                 'history',
 872         );
 873
 874         # we want to catch, among others
 875         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 876         my ($parentrefname, $parentpathname, $refname, $pathname) =
 877                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 878
 879         # first, analyze the 'current' part
 880         if (defined $pathname) {
 881                 # we got "branch:filename" or "branch:dir/"
 882                 # we could use git_get_type(branch:pathname), but:
 883                 # - it needs $git_dir
 884                 # - it does a git() call
 885                 # - the convention of terminating directories with a slash
 886                 #   makes it superfluous
 887                 # - embedding the action in the PATH_INFO would make it even
 888                 #   more superfluous
 889                 $pathname =~ s,^/+,,;
 890                 if (!$pathname || substr($pathname, -1) eq "/") {
 891                         $input_params{'action'} ||= "tree";
 892                         $pathname =~ s,/$,,;
 893                 } else {
 894                         # the default action depends on whether we had parent info
 895                         # or not
 896                         if ($parentrefname) {
 897                                 $input_params{'action'} ||= "blobdiff_plain";
 898                         } else {
 899                                 $input_params{'action'} ||= "blob_plain";
 900                         }
 901                 }
 902                 $input_params{'hash_base'} ||= $refname;
 903                 $input_params{'file_name'} ||= $pathname;
 904         } elsif (defined $refname) {
 905                 # we got "branch". In this case we have to choose if we have to
 906                 # set hash or hash_base.
 907                 #
 908                 # Most of the actions without a pathname only want hash to be
 909                 # set, except for the ones specified in @wants_base that want
 910                 # hash_base instead. It should also be noted that hand-crafted
 911                 # links having 'history' as an action and no pathname or hash
 912                 # set will fail, but that happens regardless of PATH_INFO.
 913                 if (defined $parentrefname) {
 914                         # if there is parent let the default be 'shortlog' action
 915                         # (for http://git.example.com/repo.git/A..B links); if there
 916                         # is no parent, dispatch will detect type of object and set
 917                         # action appropriately if required (if action is not set)
 918                         $input_params{'action'} ||= "shortlog";
 919                 }
 920                 if ($input_params{'action'} &&
 921                     grep { $_ eq $input_params{'action'} } @wants_base) {
 922                         $input_params{'hash_base'} ||= $refname;
 923                 } else {
 924                         $input_params{'hash'} ||= $refname;
 925                 }
 926         }
 927
 928         # next, handle the 'parent' part, if present
 929         if (defined $parentrefname) {
 930                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 931                 # someproject/blobdiff/oldrev..newrev:/filename
 932                 if ($parentpathname) {
 933                         $parentpathname =~ s,^/+,,;
 934                         $parentpathname =~ s,/$,,;
 935                         $input_params{'file_parent'} ||= $parentpathname;
 936                 } else {
 937                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 938                 }
 939                 # we assume that hash_parent_base is wanted if a path was specified,
 940                 # or if the action wants hash_base instead of hash
 941                 if (defined $input_params{'file_parent'} ||
 942                         grep { $_ eq $input_params{'action'} } @wants_base) {
 943                         $input_params{'hash_parent_base'} ||= $parentrefname;
 944                 } else {
 945                         $input_params{'hash_parent'} ||= $parentrefname;
 946                 }
 947         }
 948
 949         # for the snapshot action, we allow URLs in the form
 950         # $project/snapshot/$hash.ext
 951         # where .ext determines the snapshot and gets removed from the
 952         # passed $refname to provide the $hash.
 953         #
 954         # To be able to tell that $refname includes the format extension, we
 955         # require the following two conditions to be satisfied:
 956         # - the hash input parameter MUST have been set from the $refname part
 957         #   of the URL (i.e. they must be equal)
 958         # - the snapshot format MUST NOT have been defined already (e.g. from
 959         #   CGI parameter sf)
 960         # It's also useless to try any matching unless $refname has a dot,
 961         # so we check for that too
 962         if (defined $input_params{'action'} &&
 963                 $input_params{'action'} eq 'snapshot' &&
 964                 defined $refname && index($refname, '.') != -1 &&
 965                 $refname eq $input_params{'hash'} &&
 966                 !defined $input_params{'snapshot_format'}) {
 967                 # We loop over the known snapshot formats, checking for
 968                 # extensions. Allowed extensions are both the defined suffix
 969                 # (which includes the initial dot already) and the snapshot
 970                 # format key itself, with a prepended dot
 971                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 972                         my $hash = $refname;
 973                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 974                                 next;
 975                         }
 976                         my $sfx = $1;
 977                         # a valid suffix was found, so set the snapshot format
 978                         # and reset the hash parameter
 979                         $input_params{'snapshot_format'} = $fmt;
 980                         $input_params{'hash'} = $hash;
 981                         # we also set the format suffix to the one requested
 982                         # in the URL: this way a request for e.g. .tgz returns
 983                         # a .tgz instead of a .tar.gz
 984                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 985                         last;
 986                 }
 987         }
 988 }
 989
 990 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 991      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 992      $searchtext, $search_regexp, $project_filter);
 993 sub evaluate_and_validate_params {
 994         our $action = $input_params{'action'};
 995         if (defined $action) {
 996                 if (!validate_action($action)) {
 997                         die_error(400, "Invalid action parameter");
 998                 }
 999         }
1000
1001         # parameters which are pathnames
1002         our $project = $input_params{'project'};
1003         if (defined $project) {
1004                 if (!validate_project($project)) {
1005                         undef $project;
1006                         die_error(404, "No such project");
1007                 }
1008         }
1009
1010         our $project_filter = $input_params{'project_filter'};
1011         if (defined $project_filter) {
1012                 if (!validate_pathname($project_filter)) {
1013                         die_error(404, "Invalid project_filter parameter");
1014                 }
1015         }
1016
1017         our $file_name = $input_params{'file_name'};
1018         if (defined $file_name) {
1019                 if (!validate_pathname($file_name)) {
1020                         die_error(400, "Invalid file parameter");
1021                 }
1022         }
1023
1024         our $file_parent = $input_params{'file_parent'};
1025         if (defined $file_parent) {
1026                 if (!validate_pathname($file_parent)) {
1027                         die_error(400, "Invalid file parent parameter");
1028                 }
1029         }
1030
1031         # parameters which are refnames
1032         our $hash = $input_params{'hash'};
1033         if (defined $hash) {
1034                 if (!validate_refname($hash)) {
1035                         die_error(400, "Invalid hash parameter");
1036                 }
1037         }
1038
1039         our $hash_parent = $input_params{'hash_parent'};
1040         if (defined $hash_parent) {
1041                 if (!validate_refname($hash_parent)) {
1042                         die_error(400, "Invalid hash parent parameter");
1043                 }
1044         }
1045
1046         our $hash_base = $input_params{'hash_base'};
1047         if (defined $hash_base) {
1048                 if (!validate_refname($hash_base)) {
1049                         die_error(400, "Invalid hash base parameter");
1050                 }
1051         }
1052
1053         our @extra_options = @{$input_params{'extra_options'}};
1054         # @extra_options is always defined, since it can only be (currently) set from
1055         # CGI, and $cgi->param() returns the empty array in array context if the param
1056         # is not set
1057         foreach my $opt (@extra_options) {
1058                 if (not exists $allowed_options{$opt}) {
1059                         die_error(400, "Invalid option parameter");
1060                 }
1061                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1062                         die_error(400, "Invalid option parameter for this action");
1063                 }
1064         }
1065
1066         our $hash_parent_base = $input_params{'hash_parent_base'};
1067         if (defined $hash_parent_base) {
1068                 if (!validate_refname($hash_parent_base)) {
1069                         die_error(400, "Invalid hash parent base parameter");
1070                 }
1071         }
1072
1073         # other parameters
1074         our $page = $input_params{'page'};
1075         if (defined $page) {
1076                 if ($page =~ m/[^0-9]/) {
1077                         die_error(400, "Invalid page parameter");
1078                 }
1079         }
1080
1081         our $searchtype = $input_params{'searchtype'};
1082         if (defined $searchtype) {
1083                 if ($searchtype =~ m/[^a-z]/) {
1084                         die_error(400, "Invalid searchtype parameter");
1085                 }
1086         }
1087
1088         our $search_use_regexp = $input_params{'search_use_regexp'};
1089
1090         our $searchtext = $input_params{'searchtext'};
1091         our $search_regexp;
1092         if (defined $searchtext) {
1093                 if (length($searchtext) < 2) {
1094                         die_error(403, "At least two characters are required for search parameter");
1095                 }
1096                 if ($search_use_regexp) {
1097                         $search_regexp = $searchtext;
1098                         if (!eval { qr/$search_regexp/; 1; }) {
1099                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1100                                 die_error(400, "Invalid search regexp '$search_regexp'",
1101                                           esc_html($error));
1102                         }
1103                 } else {
1104                         $search_regexp = quotemeta $searchtext;
1105                 }
1106         }
1107 }
1108
1109 # path to the current git repository
1110 our $git_dir;
1111 sub evaluate_git_dir {
1112         our $git_dir = "$projectroot/$project" if $project;
1113 }
1114
1115 our (@snapshot_fmts, $git_avatar);
1116 sub configure_gitweb_features {
1117         # list of supported snapshot formats
1118         our @snapshot_fmts = gitweb_get_feature('snapshot');
1119         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1120
1121         # check that the avatar feature is set to a known provider name,
1122         # and for each provider check if the dependencies are satisfied.
1123         # if the provider name is invalid or the dependencies are not met,
1124         # reset $git_avatar to the empty string.
1125         our ($git_avatar) = gitweb_get_feature('avatar');
1126         if ($git_avatar eq 'gravatar') {
1127                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1128         } elsif ($git_avatar eq 'picon') {
1129                 # no dependencies
1130         } else {
1131                 $git_avatar = '';
1132         }
1133 }
1134
1135 # custom error handler: 'die <message>' is Internal Server Error
1136 sub handle_errors_html {
1137         my $msg = shift; # it is already HTML escaped
1138
1139         # to avoid infinite loop where error occurs in die_error,
1140         # change handler to default handler, disabling handle_errors_html
1141         set_message("Error occured when inside die_error:\n$msg");
1142
1143         # you cannot jump out of die_error when called as error handler;
1144         # the subroutine set via CGI::Carp::set_message is called _after_
1145         # HTTP headers are already written, so it cannot write them itself
1146         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1147 }
1148 set_message(\&handle_errors_html);
1149
1150 # dispatch
1151 sub dispatch {
1152         if (!defined $action) {
1153                 if (defined $hash) {
1154                         $action = git_get_type($hash);
1155                         $action or die_error(404, "Object does not exist");
1156                 } elsif (defined $hash_base && defined $file_name) {
1157                         $action = git_get_type("$hash_base:$file_name");
1158                         $action or die_error(404, "File or directory does not exist");
1159                 } elsif (defined $project) {
1160                         $action = 'summary';
1161                 } else {
1162                         $action = 'project_list';
1163                 }
1164         }
1165         if (!defined($actions{$action})) {
1166                 die_error(400, "Unknown action");
1167         }
1168         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1169             !$project) {
1170                 die_error(400, "Project needed");
1171         }
1172         $actions{$action}->();
1173 }
1174
1175 sub reset_timer {
1176         our $t0 = [ gettimeofday() ]
1177                 if defined $t0;
1178         our $number_of_git_cmds = 0;
1179 }
1180
1181 our $first_request = 1;
1182 sub run_request {
1183         reset_timer();
1184
1185         evaluate_uri();
1186         if ($first_request) {
1187                 evaluate_gitweb_config();
1188                 evaluate_git_version();
1189         }
1190         if ($per_request_config) {
1191                 if (ref($per_request_config) eq 'CODE') {
1192                         $per_request_config->();
1193                 } elsif (!$first_request) {
1194                         evaluate_gitweb_config();
1195                 }
1196         }
1197         check_loadavg();
1198
1199         # $projectroot and $projects_list might be set in gitweb config file
1200         $projects_list ||= $projectroot;
1201
1202         evaluate_query_params();
1203         evaluate_path_info();
1204         evaluate_and_validate_params();
1205         evaluate_git_dir();
1206
1207         configure_gitweb_features();
1208
1209         dispatch();
1210 }
1211
1212 our $is_last_request = sub { 1 };
1213 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1214 our $CGI = 'CGI';
1215 our $cgi;
1216 sub configure_as_fcgi {
1217         require CGI::Fast;
1218         our $CGI = 'CGI::Fast';
1219
1220         my $request_number = 0;
1221         # let each child service 100 requests
1222         our $is_last_request = sub { ++$request_number > 100 };
1223 }
1224 sub evaluate_argv {
1225         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1226         configure_as_fcgi()
1227                 if $script_name =~ /\.fcgi$/;
1228
1229         return unless (@ARGV);
1230
1231         require Getopt::Long;
1232         Getopt::Long::GetOptions(
1233                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1234                 'nproc|n=i' => sub {
1235                         my ($arg, $val) = @_;
1236                         return unless eval { require FCGI::ProcManager; 1; };
1237                         my $proc_manager = FCGI::ProcManager->new({
1238                                 n_processes => $val,
1239                         });
1240                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1241                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1242                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1243                 },
1244         );
1245 }
1246
1247 sub run {
1248         evaluate_argv();
1249
1250         $first_request = 1;
1251         $pre_listen_hook->()
1252                 if $pre_listen_hook;
1253
1254  REQUEST:
1255         while ($cgi = $CGI->new()) {
1256                 $pre_dispatch_hook->()
1257                         if $pre_dispatch_hook;
1258
1259                 run_request();
1260
1261                 $post_dispatch_hook->()
1262                         if $post_dispatch_hook;
1263                 $first_request = 0;
1264
1265                 last REQUEST if ($is_last_request->());
1266         }
1267
1268  DONE_GITWEB:
1269         1;
1270 }
1271
1272 run();
1273
1274 if (defined caller) {
1275         # wrapped in a subroutine processing requests,
1276         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1277         return;
1278 } else {
1279         # pure CGI script, serving single request
1280         exit;
1281 }
1282
1283 ## ======================================================================
1284 ## action links
1285
1286 # possible values of extra options
1287 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1288 # -replay => 1      - start from a current view (replay with modifications)
1289 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1290 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1291 sub href {
1292         my %params = @_;
1293         # default is to use -absolute url() i.e. $my_uri
1294         my $href = $params{-full} ? $my_url : $my_uri;
1295
1296         # implicit -replay, must be first of implicit params
1297         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1298
1299         $params{'project'} = $project unless exists $params{'project'};
1300
1301         if ($params{-replay}) {
1302                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1303                         if (!exists $params{$name}) {
1304                                 $params{$name} = $input_params{$name};
1305                         }
1306                 }
1307         }
1308
1309         my $use_pathinfo = gitweb_check_feature('pathinfo');
1310         if (defined $params{'project'} &&
1311             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1312                 # try to put as many parameters as possible in PATH_INFO:
1313                 #   - project name
1314                 #   - action
1315                 #   - hash_parent or hash_parent_base:/file_parent
1316                 #   - hash or hash_base:/filename
1317                 #   - the snapshot_format as an appropriate suffix
1318
1319                 # When the script is the root DirectoryIndex for the domain,
1320                 # $href here would be something like http://gitweb.example.com/
1321                 # Thus, we strip any trailing / from $href, to spare us double
1322                 # slashes in the final URL
1323                 $href =~ s,/$,,;
1324
1325                 # Then add the project name, if present
1326                 $href .= "/".esc_path_info($params{'project'});
1327                 delete $params{'project'};
1328
1329                 # since we destructively absorb parameters, we keep this
1330                 # boolean that remembers if we're handling a snapshot
1331                 my $is_snapshot = $params{'action'} eq 'snapshot';
1332
1333                 # Summary just uses the project path URL, any other action is
1334                 # added to the URL
1335                 if (defined $params{'action'}) {
1336                         $href .= "/".esc_path_info($params{'action'})
1337                                 unless $params{'action'} eq 'summary';
1338                         delete $params{'action'};
1339                 }
1340
1341                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1342                 # stripping nonexistent or useless pieces
1343                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1344                         || $params{'hash_parent'} || $params{'hash'});
1345                 if (defined $params{'hash_base'}) {
1346                         if (defined $params{'hash_parent_base'}) {
1347                                 $href .= esc_path_info($params{'hash_parent_base'});
1348                                 # skip the file_parent if it's the same as the file_name
1349                                 if (defined $params{'file_parent'}) {
1350                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1351                                                 delete $params{'file_parent'};
1352                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1353                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1354                                                 delete $params{'file_parent'};
1355                                         }
1356                                 }
1357                                 $href .= "..";
1358                                 delete $params{'hash_parent'};
1359                                 delete $params{'hash_parent_base'};
1360                         } elsif (defined $params{'hash_parent'}) {
1361                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1362                                 delete $params{'hash_parent'};
1363                         }
1364
1365                         $href .= esc_path_info($params{'hash_base'});
1366                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1367                                 $href .= ":/".esc_path_info($params{'file_name'});
1368                                 delete $params{'file_name'};
1369                         }
1370                         delete $params{'hash'};
1371                         delete $params{'hash_base'};
1372                 } elsif (defined $params{'hash'}) {
1373                         $href .= esc_path_info($params{'hash'});
1374                         delete $params{'hash'};
1375                 }
1376
1377                 # If the action was a snapshot, we can absorb the
1378                 # snapshot_format parameter too
1379                 if ($is_snapshot) {
1380                         my $fmt = $params{'snapshot_format'};
1381                         # snapshot_format should always be defined when href()
1382                         # is called, but just in case some code forgets, we
1383                         # fall back to the default
1384                         $fmt ||= $snapshot_fmts[0];
1385                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1386                         delete $params{'snapshot_format'};
1387                 }
1388         }
1389
1390         # now encode the parameters explicitly
1391         my @result = ();
1392         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1393                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1394                 if (defined $params{$name}) {
1395                         if (ref($params{$name}) eq "ARRAY") {
1396                                 foreach my $par (@{$params{$name}}) {
1397                                         push @result, $symbol . "=" . esc_param($par);
1398                                 }
1399                         } else {
1400                                 push @result, $symbol . "=" . esc_param($params{$name});
1401                         }
1402                 }
1403         }
1404         $href .= "?" . join(';', @result) if scalar @result;
1405
1406         # final transformation: trailing spaces must be escaped (URI-encoded)
1407         $href =~ s/(\s+)$/CGI::escape($1)/e;
1408
1409         if ($params{-anchor}) {
1410                 $href .= "#".esc_param($params{-anchor});
1411         }
1412
1413         return $href;
1414 }
1415
1416
1417 ## ======================================================================
1418 ## validation, quoting/unquoting and escaping
1419
1420 sub validate_action {
1421         my $input = shift || return undef;
1422         return undef unless exists $actions{$input};
1423         return $input;
1424 }
1425
1426 sub validate_project {
1427         my $input = shift || return undef;
1428         if (!validate_pathname($input) ||
1429                 !(-d "$projectroot/$input") ||
1430                 !check_export_ok("$projectroot/$input") ||
1431                 ($strict_export && !project_in_list($input))) {
1432                 return undef;
1433         } else {
1434                 return $input;
1435         }
1436 }
1437
1438 sub validate_pathname {
1439         my $input = shift || return undef;
1440
1441         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1442         # at the beginning, at the end, and between slashes.
1443         # also this catches doubled slashes
1444         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1445                 return undef;
1446         }
1447         # no null characters
1448         if ($input =~ m!\0!) {
1449                 return undef;
1450         }
1451         return $input;
1452 }
1453
1454 sub validate_refname {
1455         my $input = shift || return undef;
1456
1457         # textual hashes are O.K.
1458         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1459                 return $input;
1460         }
1461         # it must be correct pathname
1462         $input = validate_pathname($input)
1463                 or return undef;
1464         # restrictions on ref name according to git-check-ref-format
1465         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1466                 return undef;
1467         }
1468         return $input;
1469 }
1470
1471 # decode sequences of octets in utf8 into Perl's internal form,
1472 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1473 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1474 sub to_utf8 {
1475         my $str = shift;
1476         return undef unless defined $str;
1477
1478         if (utf8::is_utf8($str) || utf8::decode($str)) {
1479                 return $str;
1480         } else {
1481                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1482         }
1483 }
1484
1485 # quote unsafe chars, but keep the slash, even when it's not
1486 # correct, but quoted slashes look too horrible in bookmarks
1487 sub esc_param {
1488         my $str = shift;
1489         return undef unless defined $str;
1490         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1491         $str =~ s/ /\+/g;
1492         return $str;
1493 }
1494
1495 # the quoting rules for path_info fragment are slightly different
1496 sub esc_path_info {
1497         my $str = shift;
1498         return undef unless defined $str;
1499
1500         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1501         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1502
1503         return $str;
1504 }
1505
1506 # quote unsafe chars in whole URL, so some characters cannot be quoted
1507 sub esc_url {
1508         my $str = shift;
1509         return undef unless defined $str;
1510         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1511         $str =~ s/ /\+/g;
1512         return $str;
1513 }
1514
1515 # quote unsafe characters in HTML attributes
1516 sub esc_attr {
1517
1518         # for XHTML conformance escaping '"' to '&quot;' is not enough
1519         return esc_html(@_);
1520 }
1521
1522 # replace invalid utf8 character with SUBSTITUTION sequence
1523 sub esc_html {
1524         my $str = shift;
1525         my %opts = @_;
1526
1527         return undef unless defined $str;
1528
1529         $str = to_utf8($str);
1530         $str = $cgi->escapeHTML($str);
1531         if ($opts{'-nbsp'}) {
1532                 $str =~ s/ /&nbsp;/g;
1533         }
1534         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1535         return $str;
1536 }
1537
1538 # quote control characters and escape filename to HTML
1539 sub esc_path {
1540         my $str = shift;
1541         my %opts = @_;
1542
1543         return undef unless defined $str;
1544
1545         $str = to_utf8($str);
1546         $str = $cgi->escapeHTML($str);
1547         if ($opts{'-nbsp'}) {
1548                 $str =~ s/ /&nbsp;/g;
1549         }
1550         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1551         return $str;
1552 }
1553
1554 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1555 sub sanitize {
1556         my $str = shift;
1557
1558         return undef unless defined $str;
1559
1560         $str = to_utf8($str);
1561         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1562         return $str;
1563 }
1564
1565 # Make control characters "printable", using character escape codes (CEC)
1566 sub quot_cec {
1567         my $cntrl = shift;
1568         my %opts = @_;
1569         my %es = ( # character escape codes, aka escape sequences
1570                 "\t" => '\t',   # tab            (HT)
1571                 "\n" => '\n',   # line feed      (LF)
1572                 "\r" => '\r',   # carrige return (CR)
1573                 "\f" => '\f',   # form feed      (FF)
1574                 "\b" => '\b',   # backspace      (BS)
1575                 "\a" => '\a',   # alarm (bell)   (BEL)
1576                 "\e" => '\e',   # escape         (ESC)
1577                 "\013" => '\v', # vertical tab   (VT)
1578                 "\000" => '\0', # nul character  (NUL)
1579         );
1580         my $chr = ( (exists $es{$cntrl})
1581                     ? $es{$cntrl}
1582                     : sprintf('\%2x', ord($cntrl)) );
1583         if ($opts{-nohtml}) {
1584                 return $chr;
1585         } else {
1586                 return "<span class=\"cntrl\">$chr</span>";
1587         }
1588 }
1589
1590 # Alternatively use unicode control pictures codepoints,
1591 # Unicode "printable representation" (PR)
1592 sub quot_upr {
1593         my $cntrl = shift;
1594         my %opts = @_;
1595
1596         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1597         if ($opts{-nohtml}) {
1598                 return $chr;
1599         } else {
1600                 return "<span class=\"cntrl\">$chr</span>";
1601         }
1602 }
1603
1604 # git may return quoted and escaped filenames
1605 sub unquote {
1606         my $str = shift;
1607
1608         sub unq {
1609                 my $seq = shift;
1610                 my %es = ( # character escape codes, aka escape sequences
1611                         't' => "\t",   # tab            (HT, TAB)
1612                         'n' => "\n",   # newline        (NL)
1613                         'r' => "\r",   # return         (CR)
1614                         'f' => "\f",   # form feed      (FF)
1615                         'b' => "\b",   # backspace      (BS)
1616                         'a' => "\a",   # alarm (bell)   (BEL)
1617                         'e' => "\e",   # escape         (ESC)
1618                         'v' => "\013", # vertical tab   (VT)
1619                 );
1620
1621                 if ($seq =~ m/^[0-7]{1,3}$/) {
1622                         # octal char sequence
1623                         return chr(oct($seq));
1624                 } elsif (exists $es{$seq}) {
1625                         # C escape sequence, aka character escape code
1626                         return $es{$seq};
1627                 }
1628                 # quoted ordinary character
1629                 return $seq;
1630         }
1631
1632         if ($str =~ m/^"(.*)"$/) {
1633                 # needs unquoting
1634                 $str = $1;
1635                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1636         }
1637         return $str;
1638 }
1639
1640 # escape tabs (convert tabs to spaces)
1641 sub untabify {
1642         my $line = shift;
1643
1644         while ((my $pos = index($line, "\t")) != -1) {
1645                 if (my $count = (8 - ($pos % 8))) {
1646                         my $spaces = ' ' x $count;
1647                         $line =~ s/\t/$spaces/;
1648                 }
1649         }
1650
1651         return $line;
1652 }
1653
1654 sub project_in_list {
1655         my $project = shift;
1656         my @list = git_get_projects_list();
1657         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1658 }
1659
1660 ## ----------------------------------------------------------------------
1661 ## HTML aware string manipulation
1662
1663 # Try to chop given string on a word boundary between position
1664 # $len and $len+$add_len. If there is no word boundary there,
1665 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1666 # (marking chopped part) would be longer than given string.
1667 sub chop_str {
1668         my $str = shift;
1669         my $len = shift;
1670         my $add_len = shift || 10;
1671         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1672
1673         # Make sure perl knows it is utf8 encoded so we don't
1674         # cut in the middle of a utf8 multibyte char.
1675         $str = to_utf8($str);
1676
1677         # allow only $len chars, but don't cut a word if it would fit in $add_len
1678         # if it doesn't fit, cut it if it's still longer than the dots we would add
1679         # remove chopped character entities entirely
1680
1681         # when chopping in the middle, distribute $len into left and right part
1682         # return early if chopping wouldn't make string shorter
1683         if ($where eq 'center') {
1684                 return $str if ($len + 5 >= length($str)); # filler is length 5
1685                 $len = int($len/2);
1686         } else {
1687                 return $str if ($len + 4 >= length($str)); # filler is length 4
1688         }
1689
1690         # regexps: ending and beginning with word part up to $add_len
1691         my $endre = qr/.{$len}\w{0,$add_len}/;
1692         my $begre = qr/\w{0,$add_len}.{$len}/;
1693
1694         if ($where eq 'left') {
1695                 $str =~ m/^(.*?)($begre)$/;
1696                 my ($lead, $body) = ($1, $2);
1697                 if (length($lead) > 4) {
1698                         $lead = " ...";
1699                 }
1700                 return "$lead$body";
1701
1702         } elsif ($where eq 'center') {
1703                 $str =~ m/^($endre)(.*)$/;
1704                 my ($left, $str)  = ($1, $2);
1705                 $str =~ m/^(.*?)($begre)$/;
1706                 my ($mid, $right) = ($1, $2);
1707                 if (length($mid) > 5) {
1708                         $mid = " ... ";
1709                 }
1710                 return "$left$mid$right";
1711
1712         } else {
1713                 $str =~ m/^($endre)(.*)$/;
1714                 my $body = $1;
1715                 my $tail = $2;
1716                 if (length($tail) > 4) {
1717                         $tail = "... ";
1718                 }
1719                 return "$body$tail";
1720         }
1721 }
1722
1723 # takes the same arguments as chop_str, but also wraps a <span> around the
1724 # result with a title attribute if it does get chopped. Additionally, the
1725 # string is HTML-escaped.
1726 sub chop_and_escape_str {
1727         my ($str) = @_;
1728
1729         my $chopped = chop_str(@_);
1730         $str = to_utf8($str);
1731         if ($chopped eq $str) {
1732                 return esc_html($chopped);
1733         } else {
1734                 $str =~ s/[[:cntrl:]]/?/g;
1735                 return $cgi->span({-title=>$str}, esc_html($chopped));
1736         }
1737 }
1738
1739 # Highlight selected fragments of string, using given CSS class,
1740 # and escape HTML.  It is assumed that fragments do not overlap.
1741 # Regions are passed as list of pairs (array references).
1742 #
1743 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1744 # '<span class="mark">foo</span>bar'
1745 sub esc_html_hl_regions {
1746         my ($str, $css_class, @sel) = @_;
1747         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1748         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1749         return esc_html($str, %opts) unless @sel;
1750
1751         my $out = '';
1752         my $pos = 0;
1753
1754         for my $s (@sel) {
1755                 my ($begin, $end) = @$s;
1756
1757                 # Don't create empty <span> elements.
1758                 next if $end <= $begin;
1759
1760                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1761                                        %opts);
1762
1763                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1764                         if ($begin - $pos > 0);
1765                 $out .= $cgi->span({-class => $css_class}, $escaped);
1766
1767                 $pos = $end;
1768         }
1769         $out .= esc_html(substr($str, $pos), %opts)
1770                 if ($pos < length($str));
1771
1772         return $out;
1773 }
1774
1775 # return positions of beginning and end of each match
1776 sub matchpos_list {
1777         my ($str, $regexp) = @_;
1778         return unless (defined $str && defined $regexp);
1779
1780         my @matches;
1781         while ($str =~ /$regexp/g) {
1782                 push @matches, [$-[0], $+[0]];
1783         }
1784         return @matches;
1785 }
1786
1787 # highlight match (if any), and escape HTML
1788 sub esc_html_match_hl {
1789         my ($str, $regexp) = @_;
1790         return esc_html($str) unless defined $regexp;
1791
1792         my @matches = matchpos_list($str, $regexp);
1793         return esc_html($str) unless @matches;
1794
1795         return esc_html_hl_regions($str, 'match', @matches);
1796 }
1797
1798
1799 # highlight match (if any) of shortened string, and escape HTML
1800 sub esc_html_match_hl_chopped {
1801         my ($str, $chopped, $regexp) = @_;
1802         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1803
1804         my @matches = matchpos_list($str, $regexp);
1805         return esc_html($chopped) unless @matches;
1806
1807         # filter matches so that we mark chopped string
1808         my $tail = "... "; # see chop_str
1809         unless ($chopped =~ s/\Q$tail\E$//) {
1810                 $tail = '';
1811         }
1812         my $chop_len = length($chopped);
1813         my $tail_len = length($tail);
1814         my @filtered;
1815
1816         for my $m (@matches) {
1817                 if ($m->[0] > $chop_len) {
1818                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1819                         last;
1820                 } elsif ($m->[1] > $chop_len) {
1821                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1822                         last;
1823                 }
1824                 push @filtered, $m;
1825         }
1826
1827         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1828 }
1829
1830 ## ----------------------------------------------------------------------
1831 ## functions returning short strings
1832
1833 # CSS class for given age value (in seconds)
1834 sub age_class {
1835         my $age = shift;
1836
1837         if (!defined $age) {
1838                 return "noage";
1839         } elsif ($age < 60*60*2) {
1840                 return "age0";
1841         } elsif ($age < 60*60*24*2) {
1842                 return "age1";
1843         } else {
1844                 return "age2";
1845         }
1846 }
1847
1848 # convert age in seconds to "nn units ago" string
1849 sub age_string {
1850         my $age = shift;
1851         my $age_str;
1852
1853         if ($age > 60*60*24*365*2) {
1854                 $age_str = (int $age/60/60/24/365);
1855                 $age_str .= " years ago";
1856         } elsif ($age > 60*60*24*(365/12)*2) {
1857                 $age_str = int $age/60/60/24/(365/12);
1858                 $age_str .= " months ago";
1859         } elsif ($age > 60*60*24*7*2) {
1860                 $age_str = int $age/60/60/24/7;
1861                 $age_str .= " weeks ago";
1862         } elsif ($age > 60*60*24*2) {
1863                 $age_str = int $age/60/60/24;
1864                 $age_str .= " days ago";
1865         } elsif ($age > 60*60*2) {
1866                 $age_str = int $age/60/60;
1867                 $age_str .= " hours ago";
1868         } elsif ($age > 60*2) {
1869                 $age_str = int $age/60;
1870                 $age_str .= " min ago";
1871         } elsif ($age > 2) {
1872                 $age_str = int $age;
1873                 $age_str .= " sec ago";
1874         } else {
1875                 $age_str .= " right now";
1876         }
1877         return $age_str;
1878 }
1879
1880 use constant {
1881         S_IFINVALID => 0030000,
1882         S_IFGITLINK => 0160000,
1883 };
1884
1885 # submodule/subproject, a commit object reference
1886 sub S_ISGITLINK {
1887         my $mode = shift;
1888
1889         return (($mode & S_IFMT) == S_IFGITLINK)
1890 }
1891
1892 # convert file mode in octal to symbolic file mode string
1893 sub mode_str {
1894         my $mode = oct shift;
1895
1896         if (S_ISGITLINK($mode)) {
1897                 return 'm---------';
1898         } elsif (S_ISDIR($mode & S_IFMT)) {
1899                 return 'drwxr-xr-x';
1900         } elsif (S_ISLNK($mode)) {
1901                 return 'lrwxrwxrwx';
1902         } elsif (S_ISREG($mode)) {
1903                 # git cares only about the executable bit
1904                 if ($mode & S_IXUSR) {
1905                         return '-rwxr-xr-x';
1906                 } else {
1907                         return '-rw-r--r--';
1908                 };
1909         } else {
1910                 return '----------';
1911         }
1912 }
1913
1914 # convert file mode in octal to file type string
1915 sub file_type {
1916         my $mode = shift;
1917
1918         if ($mode !~ m/^[0-7]+$/) {
1919                 return $mode;
1920         } else {
1921                 $mode = oct $mode;
1922         }
1923
1924         if (S_ISGITLINK($mode)) {
1925                 return "submodule";
1926         } elsif (S_ISDIR($mode & S_IFMT)) {
1927                 return "directory";
1928         } elsif (S_ISLNK($mode)) {
1929                 return "symlink";
1930         } elsif (S_ISREG($mode)) {
1931                 return "file";
1932         } else {
1933                 return "unknown";
1934         }
1935 }
1936
1937 # convert file mode in octal to file type description string
1938 sub file_type_long {
1939         my $mode = shift;
1940
1941         if ($mode !~ m/^[0-7]+$/) {
1942                 return $mode;
1943         } else {
1944                 $mode = oct $mode;
1945         }
1946
1947         if (S_ISGITLINK($mode)) {
1948                 return "submodule";
1949         } elsif (S_ISDIR($mode & S_IFMT)) {
1950                 return "directory";
1951         } elsif (S_ISLNK($mode)) {
1952                 return "symlink";
1953         } elsif (S_ISREG($mode)) {
1954                 if ($mode & S_IXUSR) {
1955                         return "executable";
1956                 } else {
1957                         return "file";
1958                 };
1959         } else {
1960                 return "unknown";
1961         }
1962 }
1963
1964
1965 ## ----------------------------------------------------------------------
1966 ## functions returning short HTML fragments, or transforming HTML fragments
1967 ## which don't belong to other sections
1968
1969 # format line of commit message.
1970 sub format_log_line_html {
1971         my $line = shift;
1972
1973         $line = esc_html($line, -nbsp=>1);
1974         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1975                 $cgi->a({-href => href(action=>"object", hash=>$1),
1976                                         -class => "text"}, $1);
1977         }eg;
1978
1979         return $line;
1980 }
1981
1982 # format marker of refs pointing to given object
1983
1984 # the destination action is chosen based on object type and current context:
1985 # - for annotated tags, we choose the tag view unless it's the current view
1986 #   already, in which case we go to shortlog view
1987 # - for other refs, we keep the current view if we're in history, shortlog or
1988 #   log view, and select shortlog otherwise
1989 sub format_ref_marker {
1990         my ($refs, $id) = @_;
1991         my $markers = '';
1992
1993         if (defined $refs->{$id}) {
1994                 foreach my $ref (@{$refs->{$id}}) {
1995                         # this code exploits the fact that non-lightweight tags are the
1996                         # only indirect objects, and that they are the only objects for which
1997                         # we want to use tag instead of shortlog as action
1998                         my ($type, $name) = qw();
1999                         my $indirect = ($ref =~ s/\^\{\}$//);
2000                         # e.g. tags/v2.6.11 or heads/next
2001                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2002                                 $type = $1;
2003                                 $name = $2;
2004                         } else {
2005                                 $type = "ref";
2006                                 $name = $ref;
2007                         }
2008
2009                         my $class = $type;
2010                         $class .= " indirect" if $indirect;
2011
2012                         my $dest_action = "shortlog";
2013
2014                         if ($indirect) {
2015                                 $dest_action = "tag" unless $action eq "tag";
2016                         } elsif ($action =~ /^(history|(short)?log)$/) {
2017                                 $dest_action = $action;
2018                         }
2019
2020                         my $dest = "";
2021                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2022                         $dest .= $ref;
2023
2024                         my $link = $cgi->a({
2025                                 -href => href(
2026                                         action=>$dest_action,
2027                                         hash=>$dest
2028                                 )}, $name);
2029
2030                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2031                                 $link . "</span>";
2032                 }
2033         }
2034
2035         if ($markers) {
2036                 return ' <span class="refs">'. $markers . '</span>';
2037         } else {
2038                 return "";
2039         }
2040 }
2041
2042 # format, perhaps shortened and with markers, title line
2043 sub format_subject_html {
2044         my ($long, $short, $href, $extra) = @_;
2045         $extra = '' unless defined($extra);
2046
2047         if (length($short) < length($long)) {
2048                 $long =~ s/[[:cntrl:]]/?/g;
2049                 return $cgi->a({-href => $href, -class => "list subject",
2050                                 -title => to_utf8($long)},
2051                        esc_html($short)) . $extra;
2052         } else {
2053                 return $cgi->a({-href => $href, -class => "list subject"},
2054                        esc_html($long)) . $extra;
2055         }
2056 }
2057
2058 # Rather than recomputing the url for an email multiple times, we cache it
2059 # after the first hit. This gives a visible benefit in views where the avatar
2060 # for the same email is used repeatedly (e.g. shortlog).
2061 # The cache is shared by all avatar engines (currently gravatar only), which
2062 # are free to use it as preferred. Since only one avatar engine is used for any
2063 # given page, there's no risk for cache conflicts.
2064 our %avatar_cache = ();
2065
2066 # Compute the picon url for a given email, by using the picon search service over at
2067 # http://www.cs.indiana.edu/picons/search.html
2068 sub picon_url {
2069         my $email = lc shift;
2070         if (!$avatar_cache{$email}) {
2071                 my ($user, $domain) = split('@', $email);
2072                 $avatar_cache{$email} =
2073                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2074                         "$domain/$user/" .
2075                         "users+domains+unknown/up/single";
2076         }
2077         return $avatar_cache{$email};
2078 }
2079
2080 # Compute the gravatar url for a given email, if it's not in the cache already.
2081 # Gravatar stores only the part of the URL before the size, since that's the
2082 # one computationally more expensive. This also allows reuse of the cache for
2083 # different sizes (for this particular engine).
2084 sub gravatar_url {
2085         my $email = lc shift;
2086         my $size = shift;
2087         $avatar_cache{$email} ||=
2088                 "http://www.gravatar.com/avatar/" .
2089                         Digest::MD5::md5_hex($email) . "?s=";
2090         return $avatar_cache{$email} . $size;
2091 }
2092
2093 # Insert an avatar for the given $email at the given $size if the feature
2094 # is enabled.
2095 sub git_get_avatar {
2096         my ($email, %opts) = @_;
2097         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2098         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2099         $opts{-size} ||= 'default';
2100         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2101         my $url = "";
2102         if ($git_avatar eq 'gravatar') {
2103                 $url = gravatar_url($email, $size);
2104         } elsif ($git_avatar eq 'picon') {
2105                 $url = picon_url($email);
2106         }
2107         # Other providers can be added by extending the if chain, defining $url
2108         # as needed. If no variant puts something in $url, we assume avatars
2109         # are completely disabled/unavailable.
2110         if ($url) {
2111                 return $pre_white .
2112                        "<img width=\"$size\" " .
2113                             "class=\"avatar\" " .
2114                             "src=\"".esc_url($url)."\" " .
2115                             "alt=\"\" " .
2116                        "/>" . $post_white;
2117         } else {
2118                 return "";
2119         }
2120 }
2121
2122 sub format_search_author {
2123         my ($author, $searchtype, $displaytext) = @_;
2124         my $have_search = gitweb_check_feature('search');
2125
2126         if ($have_search) {
2127                 my $performed = "";
2128                 if ($searchtype eq 'author') {
2129                         $performed = "authored";
2130                 } elsif ($searchtype eq 'committer') {
2131                         $performed = "committed";
2132                 }
2133
2134                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2135                                 searchtext=>$author,
2136                                 searchtype=>$searchtype), class=>"list",
2137                                 title=>"Search for commits $performed by $author"},
2138                                 $displaytext);
2139
2140         } else {
2141                 return $displaytext;
2142         }
2143 }
2144
2145 # format the author name of the given commit with the given tag
2146 # the author name is chopped and escaped according to the other
2147 # optional parameters (see chop_str).
2148 sub format_author_html {
2149         my $tag = shift;
2150         my $co = shift;
2151         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2152         return "<$tag class=\"author\">" .
2153                format_search_author($co->{'author_name'}, "author",
2154                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2155                        $author) .
2156                "</$tag>";
2157 }
2158
2159 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2160 sub format_git_diff_header_line {
2161         my $line = shift;
2162         my $diffinfo = shift;
2163         my ($from, $to) = @_;
2164
2165         if ($diffinfo->{'nparents'}) {
2166                 # combined diff
2167                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2168                 if ($to->{'href'}) {
2169                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2170                                          esc_path($to->{'file'}));
2171                 } else { # file was deleted (no href)
2172                         $line .= esc_path($to->{'file'});
2173                 }
2174         } else {
2175                 # "ordinary" diff
2176                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2177                 if ($from->{'href'}) {
2178                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2179                                          'a/' . esc_path($from->{'file'}));
2180                 } else { # file was added (no href)
2181                         $line .= 'a/' . esc_path($from->{'file'});
2182                 }
2183                 $line .= ' ';
2184                 if ($to->{'href'}) {
2185                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2186                                          'b/' . esc_path($to->{'file'}));
2187                 } else { # file was deleted
2188                         $line .= 'b/' . esc_path($to->{'file'});
2189                 }
2190         }
2191
2192         return "<div class=\"diff header\">$line</div>\n";
2193 }
2194
2195 # format extended diff header line, before patch itself
2196 sub format_extended_diff_header_line {
2197         my $line = shift;
2198         my $diffinfo = shift;
2199         my ($from, $to) = @_;
2200
2201         # match <path>
2202         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2203                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2204                                        esc_path($from->{'file'}));
2205         }
2206         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2207                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2208                                  esc_path($to->{'file'}));
2209         }
2210         # match single <mode>
2211         if ($line =~ m/\s(\d{6})$/) {
2212                 $line .= '<span class="info"> (' .
2213                          file_type_long($1) .
2214                          ')</span>';
2215         }
2216         # match <hash>
2217         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2218                 # can match only for combined diff
2219                 $line = 'index ';
2220                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2221                         if ($from->{'href'}[$i]) {
2222                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2223                                                   -class=>"hash"},
2224                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2225                         } else {
2226                                 $line .= '0' x 7;
2227                         }
2228                         # separator
2229                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2230                 }
2231                 $line .= '..';
2232                 if ($to->{'href'}) {
2233                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2234                                          substr($diffinfo->{'to_id'},0,7));
2235                 } else {
2236                         $line .= '0' x 7;
2237                 }
2238
2239         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2240                 # can match only for ordinary diff
2241                 my ($from_link, $to_link);
2242                 if ($from->{'href'}) {
2243                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2244                                              substr($diffinfo->{'from_id'},0,7));
2245                 } else {
2246                         $from_link = '0' x 7;
2247                 }
2248                 if ($to->{'href'}) {
2249                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2250                                            substr($diffinfo->{'to_id'},0,7));
2251                 } else {
2252                         $to_link = '0' x 7;
2253                 }
2254                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2255                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2256         }
2257
2258         return $line . "<br/>\n";
2259 }
2260
2261 # format from-file/to-file diff header
2262 sub format_diff_from_to_header {
2263         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2264         my $line;
2265         my $result = '';
2266
2267         $line = $from_line;
2268         #assert($line =~ m/^---/) if DEBUG;
2269         # no extra formatting for "^--- /dev/null"
2270         if (! $diffinfo->{'nparents'}) {
2271                 # ordinary (single parent) diff
2272                 if ($line =~ m!^--- "?a/!) {
2273                         if ($from->{'href'}) {
2274                                 $line = '--- a/' .
2275                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2276                                                 esc_path($from->{'file'}));
2277                         } else {
2278                                 $line = '--- a/' .
2279                                         esc_path($from->{'file'});
2280                         }
2281                 }
2282                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2283
2284         } else {
2285                 # combined diff (merge commit)
2286                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2287                         if ($from->{'href'}[$i]) {
2288                                 $line = '--- ' .
2289                                         $cgi->a({-href=>href(action=>"blobdiff",
2290                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2291                                                              hash_parent_base=>$parents[$i],
2292                                                              file_parent=>$from->{'file'}[$i],
2293                                                              hash=>$diffinfo->{'to_id'},
2294                                                              hash_base=>$hash,
2295                                                              file_name=>$to->{'file'}),
2296                                                  -class=>"path",
2297                                                  -title=>"diff" . ($i+1)},
2298                                                 $i+1) .
2299                                         '/' .
2300                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2301                                                 esc_path($from->{'file'}[$i]));
2302                         } else {
2303                                 $line = '--- /dev/null';
2304                         }
2305                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2306                 }
2307         }
2308
2309         $line = $to_line;
2310         #assert($line =~ m/^\+\+\+/) if DEBUG;
2311         # no extra formatting for "^+++ /dev/null"
2312         if ($line =~ m!^\+\+\+ "?b/!) {
2313                 if ($to->{'href'}) {
2314                         $line = '+++ b/' .
2315                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2316                                         esc_path($to->{'file'}));
2317                 } else {
2318                         $line = '+++ b/' .
2319                                 esc_path($to->{'file'});
2320                 }
2321         }
2322         $result .= qq!<div class="diff to_file">$line</div>\n!;
2323
2324         return $result;
2325 }
2326
2327 # create note for patch simplified by combined diff
2328 sub format_diff_cc_simplified {
2329         my ($diffinfo, @parents) = @_;
2330         my $result = '';
2331
2332         $result .= "<div class=\"diff header\">" .
2333                    "diff --cc ";
2334         if (!is_deleted($diffinfo)) {
2335                 $result .= $cgi->a({-href => href(action=>"blob",
2336                                                   hash_base=>$hash,
2337                                                   hash=>$diffinfo->{'to_id'},
2338                                                   file_name=>$diffinfo->{'to_file'}),
2339                                     -class => "path"},
2340                                    esc_path($diffinfo->{'to_file'}));
2341         } else {
2342                 $result .= esc_path($diffinfo->{'to_file'});
2343         }
2344         $result .= "</div>\n" . # class="diff header"
2345                    "<div class=\"diff nodifferences\">" .
2346                    "Simple merge" .
2347                    "</div>\n"; # class="diff nodifferences"
2348
2349         return $result;
2350 }
2351
2352 sub diff_line_class {
2353         my ($line, $from, $to) = @_;
2354
2355         # ordinary diff
2356         my $num_sign = 1;
2357         # combined diff
2358         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2359                 $num_sign = scalar @{$from->{'href'}};
2360         }
2361
2362         my @diff_line_classifier = (
2363                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2364                 { regexp => qr/^\\/,               class => "incomplete"  },
2365                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2366                 # classifier for context must come before classifier add/rem,
2367                 # or we would have to use more complicated regexp, for example
2368                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2369                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2370                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2371         );
2372         for my $clsfy (@diff_line_classifier) {
2373                 return $clsfy->{'class'}
2374                         if ($line =~ $clsfy->{'regexp'});
2375         }
2376
2377         # fallback
2378         return "";
2379 }
2380
2381 # assumes that $from and $to are defined and correctly filled,
2382 # and that $line holds a line of chunk header for unified diff
2383 sub format_unidiff_chunk_header {
2384         my ($line, $from, $to) = @_;
2385
2386         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2387                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2388
2389         $from_lines = 0 unless defined $from_lines;
2390         $to_lines   = 0 unless defined $to_lines;
2391
2392         if ($from->{'href'}) {
2393                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2394                                      -class=>"list"}, $from_text);
2395         }
2396         if ($to->{'href'}) {
2397                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2398                                      -class=>"list"}, $to_text);
2399         }
2400         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2401                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2402         return $line;
2403 }
2404
2405 # assumes that $from and $to are defined and correctly filled,
2406 # and that $line holds a line of chunk header for combined diff
2407 sub format_cc_diff_chunk_header {
2408         my ($line, $from, $to) = @_;
2409
2410         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2411         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2412
2413         @from_text = split(' ', $ranges);
2414         for (my $i = 0; $i < @from_text; ++$i) {
2415                 ($from_start[$i], $from_nlines[$i]) =
2416                         (split(',', substr($from_text[$i], 1)), 0);
2417         }
2418
2419         $to_text   = pop @from_text;
2420         $to_start  = pop @from_start;
2421         $to_nlines = pop @from_nlines;
2422
2423         $line = "<span class=\"chunk_info\">$prefix ";
2424         for (my $i = 0; $i < @from_text; ++$i) {
2425                 if ($from->{'href'}[$i]) {
2426                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2427                                           -class=>"list"}, $from_text[$i]);
2428                 } else {
2429                         $line .= $from_text[$i];
2430                 }
2431                 $line .= " ";
2432         }
2433         if ($to->{'href'}) {
2434                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2435                                   -class=>"list"}, $to_text);
2436         } else {
2437                 $line .= $to_text;
2438         }
2439         $line .= " $prefix</span>" .
2440                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2441         return $line;
2442 }
2443
2444 # process patch (diff) line (not to be used for diff headers),
2445 # returning HTML-formatted (but not wrapped) line.
2446 # If the line is passed as a reference, it is treated as HTML and not
2447 # esc_html()'ed.
2448 sub format_diff_line {
2449         my ($line, $diff_class, $from, $to) = @_;
2450
2451         if (ref($line)) {
2452                 $line = $$line;
2453         } else {
2454                 chomp $line;
2455                 $line = untabify($line);
2456
2457                 if ($from && $to && $line =~ m/^\@{2} /) {
2458                         $line = format_unidiff_chunk_header($line, $from, $to);
2459                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2460                         $line = format_cc_diff_chunk_header($line, $from, $to);
2461                 } else {
2462                         $line = esc_html($line, -nbsp=>1);
2463                 }
2464         }
2465
2466         my $diff_classes = "diff";
2467         $diff_classes .= " $diff_class" if ($diff_class);
2468         $line = "<div class=\"$diff_classes\">$line</div>\n";
2469
2470         return $line;
2471 }
2472
2473 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2474 # linked.  Pass the hash of the tree/commit to snapshot.
2475 sub format_snapshot_links {
2476         my ($hash) = @_;
2477         my $num_fmts = @snapshot_fmts;
2478         if ($num_fmts > 1) {
2479                 # A parenthesized list of links bearing format names.
2480                 # e.g. "snapshot (_tar.gz_ _zip_)"
2481                 return "snapshot (" . join(' ', map
2482                         $cgi->a({
2483                                 -href => href(
2484                                         action=>"snapshot",
2485                                         hash=>$hash,
2486                                         snapshot_format=>$_
2487                                 )
2488                         }, $known_snapshot_formats{$_}{'display'})
2489                 , @snapshot_fmts) . ")";
2490         } elsif ($num_fmts == 1) {
2491                 # A single "snapshot" link whose tooltip bears the format name.
2492                 # i.e. "_snapshot_"
2493                 my ($fmt) = @snapshot_fmts;
2494                 return
2495                         $cgi->a({
2496                                 -href => href(
2497                                         action=>"snapshot",
2498                                         hash=>$hash,
2499                                         snapshot_format=>$fmt
2500                                 ),
2501                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2502                         }, "snapshot");
2503         } else { # $num_fmts == 0
2504                 return undef;
2505         }
2506 }
2507
2508 ## ......................................................................
2509 ## functions returning values to be passed, perhaps after some
2510 ## transformation, to other functions; e.g. returning arguments to href()
2511
2512 # returns hash to be passed to href to generate gitweb URL
2513 # in -title key it returns description of link
2514 sub get_feed_info {
2515         my $format = shift || 'Atom';
2516         my %res = (action => lc($format));
2517
2518         # feed links are possible only for project views
2519         return unless (defined $project);
2520         # some views should link to OPML, or to generic project feed,
2521         # or don't have specific feed yet (so they should use generic)
2522         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2523
2524         my $branch;
2525         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2526         # from tag links; this also makes possible to detect branch links
2527         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2528             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2529                 $branch = $1;
2530         }
2531         # find log type for feed description (title)
2532         my $type = 'log';
2533         if (defined $file_name) {
2534                 $type  = "history of $file_name";
2535                 $type .= "/" if ($action eq 'tree');
2536                 $type .= " on '$branch'" if (defined $branch);
2537         } else {
2538                 $type = "log of $branch" if (defined $branch);
2539         }
2540
2541         $res{-title} = $type;
2542         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2543         $res{'file_name'} = $file_name;
2544
2545         return %res;
2546 }
2547
2548 ## ----------------------------------------------------------------------
2549 ## git utility subroutines, invoking git commands
2550
2551 # returns path to the core git executable and the --git-dir parameter as list
2552 sub git_cmd {
2553         $number_of_git_cmds++;
2554         return $GIT, '--git-dir='.$git_dir;
2555 }
2556
2557 # quote the given arguments for passing them to the shell
2558 # quote_command("command", "arg 1", "arg with ' and ! characters")
2559 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2560 # Try to avoid using this function wherever possible.
2561 sub quote_command {
2562         return join(' ',
2563                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2564 }
2565
2566 # get HEAD ref of given project as hash
2567 sub git_get_head_hash {
2568         return git_get_full_hash(shift, 'HEAD');
2569 }
2570
2571 sub git_get_full_hash {
2572         return git_get_hash(@_);
2573 }
2574
2575 sub git_get_short_hash {
2576         return git_get_hash(@_, '--short=7');
2577 }
2578
2579 sub git_get_hash {
2580         my ($project, $hash, @options) = @_;
2581         my $o_git_dir = $git_dir;
2582         my $retval = undef;
2583         $git_dir = "$projectroot/$project";
2584         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2585             '--verify', '-q', @options, $hash) {
2586                 $retval = <$fd>;
2587                 chomp $retval if defined $retval;
2588                 close $fd;
2589         }
2590         if (defined $o_git_dir) {
2591                 $git_dir = $o_git_dir;
2592         }
2593         return $retval;
2594 }
2595
2596 # get type of given object
2597 sub git_get_type {
2598         my $hash = shift;
2599
2600         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2601         my $type = <$fd>;
2602         close $fd or return;
2603         chomp $type;
2604         return $type;
2605 }
2606
2607 # repository configuration
2608 our $config_file = '';
2609 our %config;
2610
2611 # store multiple values for single key as anonymous array reference
2612 # single values stored directly in the hash, not as [ <value> ]
2613 sub hash_set_multi {
2614         my ($hash, $key, $value) = @_;
2615
2616         if (!exists $hash->{$key}) {
2617                 $hash->{$key} = $value;
2618         } elsif (!ref $hash->{$key}) {
2619                 $hash->{$key} = [ $hash->{$key}, $value ];
2620         } else {
2621                 push @{$hash->{$key}}, $value;
2622         }
2623 }
2624
2625 # return hash of git project configuration
2626 # optionally limited to some section, e.g. 'gitweb'
2627 sub git_parse_project_config {
2628         my $section_regexp = shift;
2629         my %config;
2630
2631         local $/ = "\0";
2632
2633         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2634                 or return;
2635
2636         while (my $keyval = <$fh>) {
2637                 chomp $keyval;
2638                 my ($key, $value) = split(/\n/, $keyval, 2);
2639
2640                 hash_set_multi(\%config, $key, $value)
2641                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2642         }
2643         close $fh;
2644
2645         return %config;
2646 }
2647
2648 # convert config value to boolean: 'true' or 'false'
2649 # no value, number > 0, 'true' and 'yes' values are true
2650 # rest of values are treated as false (never as error)
2651 sub config_to_bool {
2652         my $val = shift;
2653
2654         return 1 if !defined $val;             # section.key
2655
2656         # strip leading and trailing whitespace
2657         $val =~ s/^\s+//;
2658         $val =~ s/\s+$//;
2659
2660         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2661                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2662 }
2663
2664 # convert config value to simple decimal number
2665 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2666 # to be multiplied by 1024, 1048576, or 1073741824
2667 sub config_to_int {
2668         my $val = shift;
2669
2670         # strip leading and trailing whitespace
2671         $val =~ s/^\s+//;
2672         $val =~ s/\s+$//;
2673
2674         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2675                 $unit = lc($unit);
2676                 # unknown unit is treated as 1
2677                 return $num * ($unit eq 'g' ? 1073741824 :
2678                                $unit eq 'm' ?    1048576 :
2679                                $unit eq 'k' ?       1024 : 1);
2680         }
2681         return $val;
2682 }
2683
2684 # convert config value to array reference, if needed
2685 sub config_to_multi {
2686         my $val = shift;
2687
2688         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2689 }
2690
2691 sub git_get_project_config {
2692         my ($key, $type) = @_;
2693
2694         return unless defined $git_dir;
2695
2696         # key sanity check
2697         return unless ($key);
2698         # only subsection, if exists, is case sensitive,
2699         # and not lowercased by 'git config -z -l'
2700         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2701                 $lo =~ s/_//g;
2702                 $key = join(".", lc($hi), $mi, lc($lo));
2703                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2704         } else {
2705                 $key = lc($key);
2706                 $key =~ s/_//g;
2707                 return if ($key =~ /\W/);
2708         }
2709         $key =~ s/^gitweb\.//;
2710
2711         # type sanity check
2712         if (defined $type) {
2713                 $type =~ s/^--//;
2714                 $type = undef
2715                         unless ($type eq 'bool' || $type eq 'int');
2716         }
2717
2718         # get config
2719         if (!defined $config_file ||
2720             $config_file ne "$git_dir/config") {
2721                 %config = git_parse_project_config('gitweb');
2722                 $config_file = "$git_dir/config";
2723         }
2724
2725         # check if config variable (key) exists
2726         return unless exists $config{"gitweb.$key"};
2727
2728         # ensure given type
2729         if (!defined $type) {
2730                 return $config{"gitweb.$key"};
2731         } elsif ($type eq 'bool') {
2732                 # backward compatibility: 'git config --bool' returns true/false
2733                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2734         } elsif ($type eq 'int') {
2735                 return config_to_int($config{"gitweb.$key"});
2736         }
2737         return $config{"gitweb.$key"};
2738 }
2739
2740 # get hash of given path at given ref
2741 sub git_get_hash_by_path {
2742         my $base = shift;
2743         my $path = shift || return undef;
2744         my $type = shift;
2745
2746         $path =~ s,/+$,,;
2747
2748         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2749                 or die_error(500, "Open git-ls-tree failed");
2750         my $line = <$fd>;
2751         close $fd or return undef;
2752
2753         if (!defined $line) {
2754                 # there is no tree or hash given by $path at $base
2755                 return undef;
2756         }
2757
2758         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2759         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2760         if (defined $type && $type ne $2) {
2761                 # type doesn't match
2762                 return undef;
2763         }
2764         return $3;
2765 }
2766
2767 # get path of entry with given hash at given tree-ish (ref)
2768 # used to get 'from' filename for combined diff (merge commit) for renames
2769 sub git_get_path_by_hash {
2770         my $base = shift || return;
2771         my $hash = shift || return;
2772
2773         local $/ = "\0";
2774
2775         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2776                 or return undef;
2777         while (my $line = <$fd>) {
2778                 chomp $line;
2779
2780                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2781                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2782                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2783                         close $fd;
2784                         return $1;
2785                 }
2786         }
2787         close $fd;
2788         return undef;
2789 }
2790
2791 ## ......................................................................
2792 ## git utility functions, directly accessing git repository
2793
2794 # get the value of config variable either from file named as the variable
2795 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2796 # configuration variable in the repository config file.
2797 sub git_get_file_or_project_config {
2798         my ($path, $name) = @_;
2799
2800         $git_dir = "$projectroot/$path";
2801         open my $fd, '<', "$git_dir/$name"
2802                 or return git_get_project_config($name);
2803         my $conf = <$fd>;
2804         close $fd;
2805         if (defined $conf) {
2806                 chomp $conf;
2807         }
2808         return $conf;
2809 }
2810
2811 sub git_get_project_description {
2812         my $path = shift;
2813         return git_get_file_or_project_config($path, 'description');
2814 }
2815
2816 sub git_get_project_category {
2817         my $path = shift;
2818         return git_get_file_or_project_config($path, 'category');
2819 }
2820
2821
2822 # supported formats:
2823 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2824 #   - if its contents is a number, use it as tag weight,
2825 #   - otherwise add a tag with weight 1
2826 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2827 #   the same value multiple times increases tag weight
2828 # * `gitweb.ctag' multi-valued repo config variable
2829 sub git_get_project_ctags {
2830         my $project = shift;
2831         my $ctags = {};
2832
2833         $git_dir = "$projectroot/$project";
2834         if (opendir my $dh, "$git_dir/ctags") {
2835                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2836                 foreach my $tagfile (@files) {
2837                         open my $ct, '<', $tagfile
2838                                 or next;
2839                         my $val = <$ct>;
2840                         chomp $val if $val;
2841                         close $ct;
2842
2843                         (my $ctag = $tagfile) =~ s#.*/##;
2844                         if ($val =~ /^\d+$/) {
2845                                 $ctags->{$ctag} = $val;
2846                         } else {
2847                                 $ctags->{$ctag} = 1;
2848                         }
2849                 }
2850                 closedir $dh;
2851
2852         } elsif (open my $fh, '<', "$git_dir/ctags") {
2853                 while (my $line = <$fh>) {
2854                         chomp $line;
2855                         $ctags->{$line}++ if $line;
2856                 }
2857                 close $fh;
2858
2859         } else {
2860                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2861                 foreach my $tag (@$taglist) {
2862                         $ctags->{$tag}++;
2863                 }
2864         }
2865
2866         return $ctags;
2867 }
2868
2869 # return hash, where keys are content tags ('ctags'),
2870 # and values are sum of weights of given tag in every project
2871 sub git_gather_all_ctags {
2872         my $projects = shift;
2873         my $ctags = {};
2874
2875         foreach my $p (@$projects) {
2876                 foreach my $ct (keys %{$p->{'ctags'}}) {
2877                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2878                 }
2879         }
2880
2881         return $ctags;
2882 }
2883
2884 sub git_populate_project_tagcloud {
2885         my $ctags = shift;
2886
2887         # First, merge different-cased tags; tags vote on casing
2888         my %ctags_lc;
2889         foreach (keys %$ctags) {
2890                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2891                 if (not $ctags_lc{lc $_}->{topcount}
2892                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2893                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2894                         $ctags_lc{lc $_}->{topname} = $_;
2895                 }
2896         }
2897
2898         my $cloud;
2899         my $matched = $input_params{'ctag'};
2900         if (eval { require HTML::TagCloud; 1; }) {
2901                 $cloud = HTML::TagCloud->new;
2902                 foreach my $ctag (sort keys %ctags_lc) {
2903                         # Pad the title with spaces so that the cloud looks
2904                         # less crammed.
2905                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2906                         $title =~ s/ /&nbsp;/g;
2907                         $title =~ s/^/&nbsp;/g;
2908                         $title =~ s/$/&nbsp;/g;
2909                         if (defined $matched && $matched eq $ctag) {
2910                                 $title = qq(<span class="match">$title</span>);
2911                         }
2912                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2913                                     $ctags_lc{$ctag}->{count});
2914                 }
2915         } else {
2916                 $cloud = {};
2917                 foreach my $ctag (keys %ctags_lc) {
2918                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2919                         if (defined $matched && $matched eq $ctag) {
2920                                 $title = qq(<span class="match">$title</span>);
2921                         }
2922                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2923                         $cloud->{$ctag}{ctag} =
2924                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2925                 }
2926         }
2927         return $cloud;
2928 }
2929
2930 sub git_show_project_tagcloud {
2931         my ($cloud, $count) = @_;
2932         if (ref $cloud eq 'HTML::TagCloud') {
2933                 return $cloud->html_and_css($count);
2934         } else {
2935                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2936                 return
2937                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2938                         join (', ', map {
2939                                 $cloud->{$_}->{'ctag'}
2940                         } splice(@tags, 0, $count)) .
2941                         '</div>';
2942         }
2943 }
2944
2945 sub git_get_project_url_list {
2946         my $path = shift;
2947
2948         $git_dir = "$projectroot/$path";
2949         open my $fd, '<', "$git_dir/cloneurl"
2950                 or return wantarray ?
2951                 @{ config_to_multi(git_get_project_config('url')) } :
2952                    config_to_multi(git_get_project_config('url'));
2953         my @git_project_url_list = map { chomp; $_ } <$fd>;
2954         close $fd;
2955
2956         return wantarray ? @git_project_url_list : \@git_project_url_list;
2957 }
2958
2959 sub git_get_projects_list {
2960         my $filter = shift || '';
2961         my $paranoid = shift;
2962         my @list;
2963
2964         if (-d $projects_list) {
2965                 # search in directory
2966                 my $dir = $projects_list;
2967                 # remove the trailing "/"
2968                 $dir =~ s!/+$!!;
2969                 my $pfxlen = length("$dir");
2970                 my $pfxdepth = ($dir =~ tr!/!!);
2971                 # when filtering, search only given subdirectory
2972                 if ($filter && !$paranoid) {
2973                         $dir .= "/$filter";
2974                         $dir =~ s!/+$!!;
2975                 }
2976
2977                 File::Find::find({
2978                         follow_fast => 1, # follow symbolic links
2979                         follow_skip => 2, # ignore duplicates
2980                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2981                         wanted => sub {
2982                                 # global variables
2983                                 our $project_maxdepth;
2984                                 our $projectroot;
2985                                 # skip project-list toplevel, if we get it.
2986                                 return if (m!^[/.]$!);
2987                                 # only directories can be git repositories
2988                                 return unless (-d $_);
2989                                 # don't traverse too deep (Find is super slow on os x)
2990                                 # $project_maxdepth excludes depth of $projectroot
2991                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2992                                         $File::Find::prune = 1;
2993                                         return;
2994                                 }
2995
2996                                 my $path = substr($File::Find::name, $pfxlen + 1);
2997                                 # paranoidly only filter here
2998                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2999                                         next;
3000                                 }
3001                                 # we check related file in $projectroot
3002                                 if (check_export_ok("$projectroot/$path")) {
3003                                         push @list, { path => $path };
3004                                         $File::Find::prune = 1;
3005                                 }
3006                         },
3007                 }, "$dir");
3008
3009         } elsif (-f $projects_list) {
3010                 # read from file(url-encoded):
3011                 # 'git%2Fgit.git Linus+Torvalds'
3012                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3013                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3014                 open my $fd, '<', $projects_list or return;
3015         PROJECT:
3016                 while (my $line = <$fd>) {
3017                         chomp $line;
3018                         my ($path, $owner) = split ' ', $line;
3019                         $path = unescape($path);
3020                         $owner = unescape($owner);
3021                         if (!defined $path) {
3022                                 next;
3023                         }
3024                         # if $filter is rpovided, check if $path begins with $filter
3025                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3026                                 next;
3027                         }
3028                         if (check_export_ok("$projectroot/$path")) {
3029                                 my $pr = {
3030                                         path => $path
3031                                 };
3032                                 if ($owner) {
3033                                         $pr->{'owner'} = to_utf8($owner);
3034                                 }
3035                                 push @list, $pr;
3036                         }
3037                 }
3038                 close $fd;
3039         }
3040         return @list;
3041 }
3042
3043 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3044 # as side effects it sets 'forks' field to list of forks for forked projects
3045 sub filter_forks_from_projects_list {
3046         my $projects = shift;
3047
3048         my %trie; # prefix tree of directories (path components)
3049         # generate trie out of those directories that might contain forks
3050         foreach my $pr (@$projects) {
3051                 my $path = $pr->{'path'};
3052                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3053                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3054                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3055                 next unless (-d "$projectroot/$path"); # containing directory exists
3056                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3057
3058                 # add to trie
3059                 my @dirs = split('/', $path);
3060                 # walk the trie, until either runs out of components or out of trie
3061                 my $ref = \%trie;
3062                 while (scalar @dirs &&
3063                        exists($ref->{$dirs[0]})) {
3064                         $ref = $ref->{shift @dirs};
3065                 }
3066                 # create rest of trie structure from rest of components
3067                 foreach my $dir (@dirs) {
3068                         $ref = $ref->{$dir} = {};
3069                 }
3070                 # create end marker, store $pr as a data
3071                 $ref->{''} = $pr if (!exists $ref->{''});
3072         }
3073
3074         # filter out forks, by finding shortest prefix match for paths
3075         my @filtered;
3076  PROJECT:
3077         foreach my $pr (@$projects) {
3078                 # trie lookup
3079                 my $ref = \%trie;
3080         DIR:
3081                 foreach my $dir (split('/', $pr->{'path'})) {
3082                         if (exists $ref->{''}) {
3083                                 # found [shortest] prefix, is a fork - skip it
3084                                 push @{$ref->{''}{'forks'}}, $pr;
3085                                 next PROJECT;
3086                         }
3087                         if (!exists $ref->{$dir}) {
3088                                 # not in trie, cannot have prefix, not a fork
3089                                 push @filtered, $pr;
3090                                 next PROJECT;
3091                         }
3092                         # If the dir is there, we just walk one step down the trie.
3093                         $ref = $ref->{$dir};
3094                 }
3095                 # we ran out of trie
3096                 # (shouldn't happen: it's either no match, or end marker)
3097                 push @filtered, $pr;
3098         }
3099
3100         return @filtered;
3101 }
3102
3103 # note: fill_project_list_info must be run first,
3104 # for 'descr_long' and 'ctags' to be filled
3105 sub search_projects_list {
3106         my ($projlist, %opts) = @_;
3107         my $tagfilter  = $opts{'tagfilter'};
3108         my $search_re = $opts{'search_regexp'};
3109
3110         return @$projlist
3111                 unless ($tagfilter || $search_re);
3112
3113         # searching projects require filling to be run before it;
3114         fill_project_list_info($projlist,
3115                                $tagfilter  ? 'ctags' : (),
3116                                $search_re ? ('path', 'descr') : ());
3117         my @projects;
3118  PROJECT:
3119         foreach my $pr (@$projlist) {
3120
3121                 if ($tagfilter) {
3122                         next unless ref($pr->{'ctags'}) eq 'HASH';
3123                         next unless
3124                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3125                 }
3126
3127                 if ($search_re) {
3128                         next unless
3129                                 $pr->{'path'} =~ /$search_re/ ||
3130                                 $pr->{'descr_long'} =~ /$search_re/;
3131                 }
3132
3133                 push @projects, $pr;
3134         }
3135
3136         return @projects;
3137 }
3138
3139 our $gitweb_project_owner = undef;
3140 sub git_get_project_list_from_file {
3141
3142         return if (defined $gitweb_project_owner);
3143
3144         $gitweb_project_owner = {};
3145         # read from file (url-encoded):
3146         # 'git%2Fgit.git Linus+Torvalds'
3147         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3148         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3149         if (-f $projects_list) {
3150                 open(my $fd, '<', $projects_list);
3151                 while (my $line = <$fd>) {
3152                         chomp $line;
3153                         my ($pr, $ow) = split ' ', $line;
3154                         $pr = unescape($pr);
3155                         $ow = unescape($ow);
3156                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3157                 }
3158                 close $fd;
3159         }
3160 }
3161
3162 sub git_get_project_owner {
3163         my $project = shift;
3164         my $owner;
3165
3166         return undef unless $project;
3167         $git_dir = "$projectroot/$project";
3168
3169         if (!defined $gitweb_project_owner) {
3170                 git_get_project_list_from_file();
3171         }
3172
3173         if (exists $gitweb_project_owner->{$project}) {
3174                 $owner = $gitweb_project_owner->{$project};
3175         }
3176         if (!defined $owner){
3177                 $owner = git_get_project_config('owner');
3178         }
3179         if (!defined $owner) {
3180                 $owner = get_file_owner("$git_dir");
3181         }
3182
3183         return $owner;
3184 }
3185
3186 sub git_get_last_activity {
3187         my ($path) = @_;
3188         my $fd;
3189
3190         $git_dir = "$projectroot/$path";
3191         open($fd, "-|", git_cmd(), 'for-each-ref',
3192              '--format=%(committer)',
3193              '--sort=-committerdate',
3194              '--count=1',
3195              'refs/heads') or return;
3196         my $most_recent = <$fd>;
3197         close $fd or return;
3198         if (defined $most_recent &&
3199             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3200                 my $timestamp = $1;
3201                 my $age = time - $timestamp;
3202                 return ($age, age_string($age));
3203         }
3204         return (undef, undef);
3205 }
3206
3207 # Implementation note: when a single remote is wanted, we cannot use 'git
3208 # remote show -n' because that command always work (assuming it's a remote URL
3209 # if it's not defined), and we cannot use 'git remote show' because that would
3210 # try to make a network roundtrip. So the only way to find if that particular
3211 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3212 # and when we find what we want.
3213 sub git_get_remotes_list {
3214         my $wanted = shift;
3215         my %remotes = ();
3216
3217         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3218         return unless $fd;
3219         while (my $remote = <$fd>) {
3220                 chomp $remote;
3221                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3222                 next if $wanted and not $remote eq $wanted;
3223                 my ($url, $key) = ($1, $2);
3224
3225                 $remotes{$remote} ||= { 'heads' => () };
3226                 $remotes{$remote}{$key} = $url;
3227         }
3228         close $fd or return;
3229         return wantarray ? %remotes : \%remotes;
3230 }
3231
3232 # Takes a hash of remotes as first parameter and fills it by adding the
3233 # available remote heads for each of the indicated remotes.
3234 sub fill_remote_heads {
3235         my $remotes = shift;
3236         my @heads = map { "remotes/$_" } keys %$remotes;
3237         my @remoteheads = git_get_heads_list(undef, @heads);
3238         foreach my $remote (keys %$remotes) {
3239                 $remotes->{$remote}{'heads'} = [ grep {
3240                         $_->{'name'} =~ s!^$remote/!!
3241                         } @remoteheads ];
3242         }
3243 }
3244
3245 sub git_get_references {
3246         my $type = shift || "";
3247         my %refs;
3248         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3249         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3250         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3251                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3252                 or return;
3253
3254         while (my $line = <$fd>) {
3255                 chomp $line;
3256                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3257                         if (defined $refs{$1}) {
3258                                 push @{$refs{$1}}, $2;
3259                         } else {
3260                                 $refs{$1} = [ $2 ];
3261                         }
3262                 }
3263         }
3264         close $fd or return;
3265         return \%refs;
3266 }
3267
3268 sub git_get_rev_name_tags {
3269         my $hash = shift || return undef;
3270
3271         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3272                 or return;
3273         my $name_rev = <$fd>;
3274         close $fd;
3275
3276         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3277                 return $1;
3278         } else {
3279                 # catches also '$hash undefined' output
3280                 return undef;
3281         }
3282 }
3283
3284 ## ----------------------------------------------------------------------
3285 ## parse to hash functions
3286
3287 sub parse_date {
3288         my $epoch = shift;
3289         my $tz = shift || "-0000";
3290
3291         my %date;
3292         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3293         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3294         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3295         $date{'hour'} = $hour;
3296         $date{'minute'} = $min;
3297         $date{'mday'} = $mday;
3298         $date{'day'} = $days[$wday];
3299         $date{'month'} = $months[$mon];
3300         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3301                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3302         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3303                              $mday, $months[$mon], $hour ,$min;
3304         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3305                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3306
3307         my ($tz_sign, $tz_hour, $tz_min) =
3308                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3309         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3310         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3311         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3312         $date{'hour_local'} = $hour;
3313         $date{'minute_local'} = $min;
3314         $date{'tz_local'} = $tz;
3315         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3316                                   1900+$year, $mon+1, $mday,
3317                                   $hour, $min, $sec, $tz);
3318         return %date;
3319 }
3320
3321 sub parse_tag {
3322         my $tag_id = shift;
3323         my %tag;
3324         my @comment;
3325
3326         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3327         $tag{'id'} = $tag_id;
3328         while (my $line = <$fd>) {
3329                 chomp $line;
3330                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3331                         $tag{'object'} = $1;
3332                 } elsif ($line =~ m/^type (.+)$/) {
3333                         $tag{'type'} = $1;
3334                 } elsif ($line =~ m/^tag (.+)$/) {
3335                         $tag{'name'} = $1;
3336                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3337                         $tag{'author'} = $1;
3338                         $tag{'author_epoch'} = $2;
3339                         $tag{'author_tz'} = $3;
3340                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3341                                 $tag{'author_name'}  = $1;
3342                                 $tag{'author_email'} = $2;
3343                         } else {
3344                                 $tag{'author_name'} = $tag{'author'};
3345                         }
3346                 } elsif ($line =~ m/--BEGIN/) {
3347                         push @comment, $line;
3348                         last;
3349                 } elsif ($line eq "") {
3350                         last;
3351                 }
3352         }
3353         push @comment, <$fd>;
3354         $tag{'comment'} = \@comment;
3355         close $fd or return;
3356         if (!defined $tag{'name'}) {
3357                 return
3358         };
3359         return %tag
3360 }
3361
3362 sub parse_commit_text {
3363         my ($commit_text, $withparents) = @_;
3364         my @commit_lines = split '\n', $commit_text;
3365         my %co;
3366
3367         pop @commit_lines; # Remove '\0'
3368
3369         if (! @commit_lines) {
3370                 return;
3371         }
3372
3373         my $header = shift @commit_lines;
3374         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3375                 return;
3376         }
3377         ($co{'id'}, my @parents) = split ' ', $header;
3378         while (my $line = shift @commit_lines) {
3379                 last if $line eq "\n";
3380                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3381                         $co{'tree'} = $1;
3382                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3383                         push @parents, $1;
3384                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3385                         $co{'author'} = to_utf8($1);
3386                         $co{'author_epoch'} = $2;
3387                         $co{'author_tz'} = $3;
3388                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3389                                 $co{'author_name'}  = $1;
3390                                 $co{'author_email'} = $2;
3391                         } else {
3392                                 $co{'author_name'} = $co{'author'};
3393                         }
3394                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3395                         $co{'committer'} = to_utf8($1);
3396                         $co{'committer_epoch'} = $2;
3397                         $co{'committer_tz'} = $3;
3398                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3399                                 $co{'committer_name'}  = $1;
3400                                 $co{'committer_email'} = $2;
3401                         } else {
3402                                 $co{'committer_name'} = $co{'committer'};
3403                         }
3404                 }
3405         }
3406         if (!defined $co{'tree'}) {
3407                 return;
3408         };
3409         $co{'parents'} = \@parents;
3410         $co{'parent'} = $parents[0];
3411
3412         foreach my $title (@commit_lines) {
3413                 $title =~ s/^    //;
3414                 if ($title ne "") {
3415                         $co{'title'} = chop_str($title, 80, 5);
3416                         # remove leading stuff of merges to make the interesting part visible
3417                         if (length($title) > 50) {
3418                                 $title =~ s/^Automatic //;
3419                                 $title =~ s/^merge (of|with) /Merge ... /i;
3420                                 if (length($title) > 50) {
3421                                         $title =~ s/(http|rsync):\/\///;
3422                                 }
3423                                 if (length($title) > 50) {
3424                                         $title =~ s/(master|www|rsync)\.//;
3425                                 }
3426                                 if (length($title) > 50) {
3427                                         $title =~ s/kernel.org:?//;
3428                                 }
3429                                 if (length($title) > 50) {
3430                                         $title =~ s/\/pub\/scm//;
3431                                 }
3432                         }
3433                         $co{'title_short'} = chop_str($title, 50, 5);
3434                         last;
3435                 }
3436         }
3437         if (! defined $co{'title'} || $co{'title'} eq "") {
3438                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3439         }
3440         # remove added spaces
3441         foreach my $line (@commit_lines) {
3442                 $line =~ s/^    //;
3443         }
3444         $co{'comment'} = \@commit_lines;
3445
3446         my $age = time - $co{'committer_epoch'};
3447         $co{'age'} = $age;
3448         $co{'age_string'} = age_string($age);
3449         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3450         if ($age > 60*60*24*7*2) {
3451                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3452                 $co{'age_string_age'} = $co{'age_string'};
3453         } else {
3454                 $co{'age_string_date'} = $co{'age_string'};
3455                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3456         }
3457         return %co;
3458 }
3459
3460 sub parse_commit {
3461         my ($commit_id) = @_;
3462         my %co;
3463
3464         local $/ = "\0";
3465
3466         open my $fd, "-|", git_cmd(), "rev-list",
3467                 "--parents",
3468                 "--header",
3469                 "--max-count=1",
3470                 $commit_id,
3471                 "--",
3472                 or die_error(500, "Open git-rev-list failed");
3473         %co = parse_commit_text(<$fd>, 1);
3474         close $fd;
3475
3476         return %co;
3477 }
3478
3479 sub parse_commits {
3480         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3481         my @cos;
3482
3483         $maxcount ||= 1;
3484         $skip ||= 0;
3485
3486         local $/ = "\0";
3487
3488         open my $fd, "-|", git_cmd(), "rev-list",
3489                 "--header",
3490                 @args,
3491                 ("--max-count=" . $maxcount),
3492                 ("--skip=" . $skip),
3493                 @extra_options,
3494                 $commit_id,
3495                 "--",
3496                 ($filename ? ($filename) : ())
3497                 or die_error(500, "Open git-rev-list failed");
3498         while (my $line = <$fd>) {
3499                 my %co = parse_commit_text($line);
3500                 push @cos, \%co;
3501         }
3502         close $fd;
3503
3504         return wantarray ? @cos : \@cos;
3505 }
3506
3507 # parse line of git-diff-tree "raw" output
3508 sub parse_difftree_raw_line {
3509         my $line = shift;
3510         my %res;
3511
3512         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3513         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3514         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3515                 $res{'from_mode'} = $1;
3516                 $res{'to_mode'} = $2;
3517                 $res{'from_id'} = $3;
3518                 $res{'to_id'} = $4;
3519                 $res{'status'} = $5;
3520                 $res{'similarity'} = $6;
3521                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3522                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3523                 } else {
3524                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3525                 }
3526         }
3527         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3528         # combined diff (for merge commit)
3529         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3530                 $res{'nparents'}  = length($1);
3531                 $res{'from_mode'} = [ split(' ', $2) ];
3532                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3533                 $res{'from_id'} = [ split(' ', $3) ];
3534                 $res{'to_id'} = pop @{$res{'from_id'}};
3535                 $res{'status'} = [ split('', $4) ];
3536                 $res{'to_file'} = unquote($5);
3537         }
3538         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3539         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3540                 $res{'commit'} = $1;
3541         }
3542
3543         return wantarray ? %res : \%res;
3544 }
3545
3546 # wrapper: return parsed line of git-diff-tree "raw" output
3547 # (the argument might be raw line, or parsed info)
3548 sub parsed_difftree_line {
3549         my $line_or_ref = shift;
3550
3551         if (ref($line_or_ref) eq "HASH") {
3552                 # pre-parsed (or generated by hand)
3553                 return $line_or_ref;
3554         } else {
3555                 return parse_difftree_raw_line($line_or_ref);
3556         }
3557 }
3558
3559 # parse line of git-ls-tree output
3560 sub parse_ls_tree_line {
3561         my $line = shift;
3562         my %opts = @_;
3563         my %res;
3564
3565         if ($opts{'-l'}) {
3566                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3567                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3568
3569                 $res{'mode'} = $1;
3570                 $res{'type'} = $2;
3571                 $res{'hash'} = $3;
3572                 $res{'size'} = $4;
3573                 if ($opts{'-z'}) {
3574                         $res{'name'} = $5;
3575                 } else {
3576                         $res{'name'} = unquote($5);
3577                 }
3578         } else {
3579                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3580                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3581
3582                 $res{'mode'} = $1;
3583                 $res{'type'} = $2;
3584                 $res{'hash'} = $3;
3585                 if ($opts{'-z'}) {
3586                         $res{'name'} = $4;
3587                 } else {
3588                         $res{'name'} = unquote($4);
3589                 }
3590         }
3591
3592         return wantarray ? %res : \%res;
3593 }
3594
3595 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3596 sub parse_from_to_diffinfo {
3597         my ($diffinfo, $from, $to, @parents) = @_;
3598
3599         if ($diffinfo->{'nparents'}) {
3600                 # combined diff
3601                 $from->{'file'} = [];
3602                 $from->{'href'} = [];
3603                 fill_from_file_info($diffinfo, @parents)
3604                         unless exists $diffinfo->{'from_file'};
3605                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3606                         $from->{'file'}[$i] =
3607                                 defined $diffinfo->{'from_file'}[$i] ?
3608                                         $diffinfo->{'from_file'}[$i] :
3609                                         $diffinfo->{'to_file'};
3610                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3611                                 $from->{'href'}[$i] = href(action=>"blob",
3612                                                            hash_base=>$parents[$i],
3613                                                            hash=>$diffinfo->{'from_id'}[$i],
3614                                                            file_name=>$from->{'file'}[$i]);
3615                         } else {
3616                                 $from->{'href'}[$i] = undef;
3617                         }
3618                 }
3619         } else {
3620                 # ordinary (not combined) diff
3621                 $from->{'file'} = $diffinfo->{'from_file'};
3622                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3623                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3624                                                hash=>$diffinfo->{'from_id'},
3625                                                file_name=>$from->{'file'});
3626                 } else {
3627                         delete $from->{'href'};
3628                 }
3629         }
3630
3631         $to->{'file'} = $diffinfo->{'to_file'};
3632         if (!is_deleted($diffinfo)) { # file exists in result
3633                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3634                                      hash=>$diffinfo->{'to_id'},
3635                                      file_name=>$to->{'file'});
3636         } else {
3637                 delete $to->{'href'};
3638         }
3639 }
3640
3641 ## ......................................................................
3642 ## parse to array of hashes functions
3643
3644 sub git_get_heads_list {
3645         my ($limit, @classes) = @_;
3646         @classes = ('heads') unless @classes;
3647         my @patterns = map { "refs/$_" } @classes;
3648         my @headslist;
3649
3650         open my $fd, '-|', git_cmd(), 'for-each-ref',
3651                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3652                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3653                 @patterns
3654                 or return;
3655         while (my $line = <$fd>) {
3656                 my %ref_item;
3657
3658                 chomp $line;
3659                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3660                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3661                 my ($committer, $epoch, $tz) =
3662                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3663                 $ref_item{'fullname'}  = $name;
3664                 $name =~ s!^refs/(?:head|remote)s/!!;
3665
3666                 $ref_item{'name'}  = $name;
3667                 $ref_item{'id'}    = $hash;
3668                 $ref_item{'title'} = $title || '(no commit message)';
3669                 $ref_item{'epoch'} = $epoch;
3670                 if ($epoch) {
3671                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3672                 } else {
3673                         $ref_item{'age'} = "unknown";
3674                 }
3675
3676                 push @headslist, \%ref_item;
3677         }
3678         close $fd;
3679
3680         return wantarray ? @headslist : \@headslist;
3681 }
3682
3683 sub git_get_tags_list {
3684         my $limit = shift;
3685         my @tagslist;
3686
3687         open my $fd, '-|', git_cmd(), 'for-each-ref',
3688                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3689                 '--format=%(objectname) %(objecttype) %(refname) '.
3690                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3691                 'refs/tags'
3692                 or return;
3693         while (my $line = <$fd>) {
3694                 my %ref_item;
3695
3696                 chomp $line;
3697                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3698                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3699                 my ($creator, $epoch, $tz) =
3700                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3701                 $ref_item{'fullname'} = $name;
3702                 $name =~ s!^refs/tags/!!;
3703
3704                 $ref_item{'type'} = $type;
3705                 $ref_item{'id'} = $id;
3706                 $ref_item{'name'} = $name;
3707                 if ($type eq "tag") {
3708                         $ref_item{'subject'} = $title;
3709                         $ref_item{'reftype'} = $reftype;
3710                         $ref_item{'refid'}   = $refid;
3711                 } else {
3712                         $ref_item{'reftype'} = $type;
3713                         $ref_item{'refid'}   = $id;
3714                 }
3715
3716                 if ($type eq "tag" || $type eq "commit") {
3717                         $ref_item{'epoch'} = $epoch;
3718                         if ($epoch) {
3719                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3720                         } else {
3721                                 $ref_item{'age'} = "unknown";
3722                         }
3723                 }
3724
3725                 push @tagslist, \%ref_item;
3726         }
3727         close $fd;
3728
3729         return wantarray ? @tagslist : \@tagslist;
3730 }
3731
3732 ## ----------------------------------------------------------------------
3733 ## filesystem-related functions
3734
3735 sub get_file_owner {
3736         my $path = shift;
3737
3738         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3739         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3740         if (!defined $gcos) {
3741                 return undef;
3742         }
3743         my $owner = $gcos;
3744         $owner =~ s/[,;].*$//;
3745         return to_utf8($owner);
3746 }
3747
3748 # assume that file exists
3749 sub insert_file {
3750         my $filename = shift;
3751
3752         open my $fd, '<', $filename;
3753         print map { to_utf8($_) } <$fd>;
3754         close $fd;
3755 }
3756
3757 ## ......................................................................
3758 ## mimetype related functions
3759
3760 sub mimetype_guess_file {
3761         my $filename = shift;
3762         my $mimemap = shift;
3763         -r $mimemap or return undef;
3764
3765         my %mimemap;
3766         open(my $mh, '<', $mimemap) or return undef;
3767         while (<$mh>) {
3768                 next if m/^#/; # skip comments
3769                 my ($mimetype, @exts) = split(/\s+/);
3770                 foreach my $ext (@exts) {
3771                         $mimemap{$ext} = $mimetype;
3772                 }
3773         }
3774         close($mh);
3775
3776         $filename =~ /\.([^.]*)$/;
3777         return $mimemap{$1};
3778 }
3779
3780 sub mimetype_guess {
3781         my $filename = shift;
3782         my $mime;
3783         $filename =~ /\./ or return undef;
3784
3785         if ($mimetypes_file) {
3786                 my $file = $mimetypes_file;
3787                 if ($file !~ m!^/!) { # if it is relative path
3788                         # it is relative to project
3789                         $file = "$projectroot/$project/$file";
3790                 }
3791                 $mime = mimetype_guess_file($filename, $file);
3792         }
3793         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3794         return $mime;
3795 }
3796
3797 sub blob_mimetype {
3798         my $fd = shift;
3799         my $filename = shift;
3800
3801         if ($filename) {
3802                 my $mime = mimetype_guess($filename);
3803                 $mime and return $mime;
3804         }
3805
3806         # just in case
3807         return $default_blob_plain_mimetype unless $fd;
3808
3809         if (-T $fd) {
3810                 return 'text/plain';
3811         } elsif (! $filename) {
3812                 return 'application/octet-stream';
3813         } elsif ($filename =~ m/\.png$/i) {
3814                 return 'image/png';
3815         } elsif ($filename =~ m/\.gif$/i) {
3816                 return 'image/gif';
3817         } elsif ($filename =~ m/\.jpe?g$/i) {
3818                 return 'image/jpeg';
3819         } else {
3820                 return 'application/octet-stream';
3821         }
3822 }
3823
3824 sub blob_contenttype {
3825         my ($fd, $file_name, $type) = @_;
3826
3827         $type ||= blob_mimetype($fd, $file_name);
3828         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3829                 $type .= "; charset=$default_text_plain_charset";
3830         }
3831
3832         return $type;
3833 }
3834
3835 # guess file syntax for syntax highlighting; return undef if no highlighting
3836 # the name of syntax can (in the future) depend on syntax highlighter used
3837 sub guess_file_syntax {
3838         my ($highlight, $mimetype, $file_name) = @_;
3839         return undef unless ($highlight && defined $file_name);
3840         my $basename = basename($file_name, '.in');
3841         return $highlight_basename{$basename}
3842                 if exists $highlight_basename{$basename};
3843
3844         $basename =~ /\.([^.]*)$/;
3845         my $ext = $1 or return undef;
3846         return $highlight_ext{$ext}
3847                 if exists $highlight_ext{$ext};
3848
3849         return undef;
3850 }
3851
3852 # run highlighter and return FD of its output,
3853 # or return original FD if no highlighting
3854 sub run_highlighter {
3855         my ($fd, $highlight, $syntax) = @_;
3856         return $fd unless ($highlight && defined $syntax);
3857
3858         close $fd;
3859         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3860                   quote_command($highlight_bin).
3861                   " --replace-tabs=8 --fragment --syntax $syntax |"
3862                 or die_error(500, "Couldn't open file or run syntax highlighter");
3863         return $fd;
3864 }
3865
3866 ## ======================================================================
3867 ## functions printing HTML: header, footer, error page
3868
3869 sub get_page_title {
3870         my $title = to_utf8($site_name);
3871
3872         unless (defined $project) {
3873                 if (defined $project_filter) {
3874                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3875                 }
3876                 return $title;
3877         }
3878         $title .= " - " . to_utf8($project);
3879
3880         return $title unless (defined $action);
3881         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3882
3883         return $title unless (defined $file_name);
3884         $title .= " - " . esc_path($file_name);
3885         if ($action eq "tree" && $file_name !~ m|/$|) {
3886                 $title .= "/";
3887         }
3888
3889         return $title;
3890 }
3891
3892 sub get_content_type_html {
3893         # require explicit support from the UA if we are to send the page as
3894         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3895         # we have to do this because MSIE sometimes globs '*/*', pretending to
3896         # support xhtml+xml but choking when it gets what it asked for.
3897         if (defined $cgi->http('HTTP_ACCEPT') &&
3898             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3899             $cgi->Accept('application/xhtml+xml') != 0) {
3900                 return 'application/xhtml+xml';
3901         } else {
3902                 return 'text/html';
3903         }
3904 }
3905
3906 sub print_feed_meta {
3907         if (defined $project) {
3908                 my %href_params = get_feed_info();
3909                 if (!exists $href_params{'-title'}) {
3910                         $href_params{'-title'} = 'log';
3911                 }
3912
3913                 foreach my $format (qw(RSS Atom)) {
3914                         my $type = lc($format);
3915                         my %link_attr = (
3916                                 '-rel' => 'alternate',
3917                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3918                                 '-type' => "application/$type+xml"
3919                         );
3920
3921                         $href_params{'extra_options'} = undef;
3922                         $href_params{'action'} = $type;
3923                         $link_attr{'-href'} = href(%href_params);
3924                         print "<link ".
3925                               "rel=\"$link_attr{'-rel'}\" ".
3926                               "title=\"$link_attr{'-title'}\" ".
3927                               "href=\"$link_attr{'-href'}\" ".
3928                               "type=\"$link_attr{'-type'}\" ".
3929                               "/>\n";
3930
3931                         $href_params{'extra_options'} = '--no-merges';
3932                         $link_attr{'-href'} = href(%href_params);
3933                         $link_attr{'-title'} .= ' (no merges)';
3934                         print "<link ".
3935                               "rel=\"$link_attr{'-rel'}\" ".
3936                               "title=\"$link_attr{'-title'}\" ".
3937                               "href=\"$link_attr{'-href'}\" ".
3938                               "type=\"$link_attr{'-type'}\" ".
3939                               "/>\n";
3940                 }
3941
3942         } else {
3943                 printf('<link rel="alternate" title="%s projects list" '.
3944                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3945                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3946                 printf('<link rel="alternate" title="%s projects feeds" '.
3947                        'href="%s" type="text/x-opml" />'."\n",
3948                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3949         }
3950 }
3951
3952 sub print_header_links {
3953         my $status = shift;
3954
3955         # print out each stylesheet that exist, providing backwards capability
3956         # for those people who defined $stylesheet in a config file
3957         if (defined $stylesheet) {
3958                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3959         } else {
3960                 foreach my $stylesheet (@stylesheets) {
3961                         next unless $stylesheet;
3962                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3963                 }
3964         }
3965         print_feed_meta()
3966                 if ($status eq '200 OK');
3967         if (defined $favicon) {
3968                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3969         }
3970 }
3971
3972 sub print_nav_breadcrumbs_path {
3973         my $dirprefix = undef;
3974         while (my $part = shift) {
3975                 $dirprefix .= "/" if defined $dirprefix;
3976                 $dirprefix .= $part;
3977                 print $cgi->a({-href => href(project => undef,
3978                                              project_filter => $dirprefix,
3979                                              action => "project_list")},
3980                               esc_html($part)) . " / ";
3981         }
3982 }
3983
3984 sub print_nav_breadcrumbs {
3985         my %opts = @_;
3986
3987         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3988         if (defined $project) {
3989                 my @dirname = split '/', $project;
3990                 my $projectbasename = pop @dirname;
3991                 print_nav_breadcrumbs_path(@dirname);
3992                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3993                 if (defined $action) {
3994                         my $action_print = $action ;
3995                         if (defined $opts{-action_extra}) {
3996                                 $action_print = $cgi->a({-href => href(action=>$action)},
3997                                         $action);
3998                         }
3999                         print " / $action_print";
4000                 }
4001                 if (defined $opts{-action_extra}) {
4002                         print " / $opts{-action_extra}";
4003                 }
4004                 print "\n";
4005         } elsif (defined $project_filter) {
4006                 print_nav_breadcrumbs_path(split '/', $project_filter);
4007         }
4008 }
4009
4010 sub print_search_form {
4011         if (!defined $searchtext) {
4012                 $searchtext = "";
4013         }
4014         my $search_hash;
4015         if (defined $hash_base) {
4016                 $search_hash = $hash_base;
4017         } elsif (defined $hash) {
4018                 $search_hash = $hash;
4019         } else {
4020                 $search_hash = "HEAD";
4021         }
4022         my $action = $my_uri;
4023         my $use_pathinfo = gitweb_check_feature('pathinfo');
4024         if ($use_pathinfo) {
4025                 $action .= "/".esc_url($project);
4026         }
4027         print $cgi->startform(-method => "get", -action => $action) .
4028               "<div class=\"search\">\n" .
4029               (!$use_pathinfo &&
4030               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4031               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4032               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4033               $cgi->popup_menu(-name => 'st', -default => 'commit',
4034                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4035               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4036               " search:\n",
4037               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4038               "<span title=\"Extended regular expression\">" .
4039               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4040                              -checked => $search_use_regexp) .
4041               "</span>" .
4042               "</div>" .
4043               $cgi->end_form() . "\n";
4044 }
4045
4046 sub git_header_html {
4047         my $status = shift || "200 OK";
4048         my $expires = shift;
4049         my %opts = @_;
4050
4051         my $title = get_page_title();
4052         my $content_type = get_content_type_html();
4053         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4054                            -status=> $status, -expires => $expires)
4055                 unless ($opts{'-no_http_header'});
4056         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4057         print <<EOF;
4058 <?xml version="1.0" encoding="utf-8"?>
4059 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4060 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4061 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4062 <!-- git core binaries version $git_version -->
4063 <head>
4064 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4065 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4066 <meta name="robots" content="index, nofollow"/>
4067 <title>$title</title>
4068 EOF
4069         # the stylesheet, favicon etc urls won't work correctly with path_info
4070         # unless we set the appropriate base URL
4071         if ($ENV{'PATH_INFO'}) {
4072                 print "<base href=\"".esc_url($base_url)."\" />\n";
4073         }
4074         print_header_links($status);
4075
4076         if (defined $site_html_head_string) {
4077                 print to_utf8($site_html_head_string);
4078         }
4079
4080         print "</head>\n" .
4081               "<body>\n";
4082
4083         if (defined $site_header && -f $site_header) {
4084                 insert_file($site_header);
4085         }
4086
4087         print "<div class=\"page_header\">\n";
4088         if (defined $logo) {
4089                 print $cgi->a({-href => esc_url($logo_url),
4090                                -title => $logo_label},
4091                               $cgi->img({-src => esc_url($logo),
4092                                          -width => 72, -height => 27,
4093                                          -alt => "git",
4094                                          -class => "logo"}));
4095         }
4096         print_nav_breadcrumbs(%opts);
4097         print "</div>\n";
4098
4099         my $have_search = gitweb_check_feature('search');
4100         if (defined $project && $have_search) {
4101                 print_search_form();
4102         }
4103 }
4104
4105 sub git_footer_html {
4106         my $feed_class = 'rss_logo';
4107
4108         print "<div class=\"page_footer\">\n";
4109         if (defined $project) {
4110                 my $descr = git_get_project_description($project);
4111                 if (defined $descr) {
4112                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4113                 }
4114
4115                 my %href_params = get_feed_info();
4116                 if (!%href_params) {
4117                         $feed_class .= ' generic';
4118                 }
4119                 $href_params{'-title'} ||= 'log';
4120
4121                 foreach my $format (qw(RSS Atom)) {
4122                         $href_params{'action'} = lc($format);
4123                         print $cgi->a({-href => href(%href_params),
4124                                       -title => "$href_params{'-title'} $format feed",
4125                                       -class => $feed_class}, $format)."\n";
4126                 }
4127
4128         } else {
4129                 my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime;
4130                 $year += 1900;
4131                 print "<div class=\"page_footer_text\">Copyright &copy; $year, <a href=\"$footer_url\">$footer_label</a></div>\n";
4132                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4133                                              project_filter => $project_filter),
4134                               -class => $feed_class}, "OPML") . " ";
4135                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4136                                              project_filter => $project_filter),
4137                               -class => $feed_class}, "TXT") . "\n";
4138         }
4139         print "</div>\n"; # class="page_footer"
4140
4141         if (defined $t0 && gitweb_check_feature('timed')) {
4142                 print "<div id=\"generating_info\">\n";
4143                 print 'This page took '.
4144                       '<span id="generating_time" class="time_span">'.
4145                       tv_interval($t0, [ gettimeofday() ]).
4146                       ' seconds </span>'.
4147                       ' and '.
4148                       '<span id="generating_cmd">'.
4149                       $number_of_git_cmds.
4150                       '</span> git commands '.
4151                       " to generate.\n";
4152                 print "</div>\n"; # class="page_footer"
4153         }
4154
4155         if (defined $site_footer && -f $site_footer) {
4156                 insert_file($site_footer);
4157         }
4158
4159         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4160         if (defined $action &&
4161             $action eq 'blame_incremental') {
4162                 print qq!<script type="text/javascript">\n!.
4163                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4164                       qq!           "!. href() .qq!");\n!.
4165                       qq!</script>\n!;
4166         } else {
4167                 my ($jstimezone, $tz_cookie, $datetime_class) =
4168                         gitweb_get_feature('javascript-timezone');
4169
4170                 print qq!<script type="text/javascript">\n!.
4171                       qq!window.onload = function () {\n!;
4172                 if (gitweb_check_feature('javascript-actions')) {
4173                         print qq!       fixLinks();\n!;
4174                 }
4175                 if ($jstimezone && $tz_cookie && $datetime_class) {
4176                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4177                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4178                 }
4179                 print qq!};\n!.
4180                       qq!</script>\n!;
4181         }
4182
4183         print "</body>\n" .
4184               "</html>";
4185 }
4186
4187 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4188 # Example: die_error(404, 'Hash not found')
4189 # By convention, use the following status codes (as defined in RFC 2616):
4190 # 400: Invalid or missing CGI parameters, or
4191 #      requested object exists but has wrong type.
4192 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4193 #      this server or project.
4194 # 404: Requested object/revision/project doesn't exist.
4195 # 500: The server isn't configured properly, or
4196 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4197 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4198 # 503: The server is currently unavailable (because it is overloaded,
4199 #      or down for maintenance).  Generally, this is a temporary state.
4200 sub die_error {
4201         my $status = shift || 500;
4202         my $error = esc_html(shift) || "Internal Server Error";
4203         my $extra = shift;
4204         my %opts = @_;
4205
4206         my %http_responses = (
4207                 400 => '400 Bad Request',
4208                 403 => '403 Forbidden',
4209                 404 => '404 Not Found',
4210                 500 => '500 Internal Server Error',
4211                 503 => '503 Service Unavailable',
4212         );
4213         git_header_html($http_responses{$status}, undef, %opts);
4214         print <<EOF;
4215 <div class="page_body">
4216 <br /><br />
4217 $status - $error
4218 <br />
4219 EOF
4220         if (defined $extra) {
4221                 print "<hr />\n" .
4222                       "$extra\n";
4223         }
4224         print "</div>\n";
4225
4226         git_footer_html();
4227         goto DONE_GITWEB
4228                 unless ($opts{'-error_handler'});
4229 }
4230
4231 ## ----------------------------------------------------------------------
4232 ## functions printing or outputting HTML: navigation
4233
4234 sub git_print_page_nav {
4235         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4236         $extra = '' if !defined $extra; # pager or formats
4237
4238         my @navs = qw(summary shortlog log commit commitdiff tree);
4239         if ($suppress) {
4240                 @navs = grep { $_ ne $suppress } @navs;
4241         }
4242
4243         my %arg = map { $_ => {action=>$_} } @navs;
4244         if (defined $head) {
4245                 for (qw(commit commitdiff)) {
4246                         $arg{$_}{'hash'} = $head;
4247                 }
4248                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4249                         for (qw(shortlog log)) {
4250                                 $arg{$_}{'hash'} = $head;
4251                         }
4252                 }
4253         }
4254
4255         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4256         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4257
4258         my @actions = gitweb_get_feature('actions');
4259         my %repl = (
4260                 '%' => '%',
4261                 'n' => $project,         # project name
4262                 'f' => $git_dir,         # project path within filesystem
4263                 'h' => $treehead || '',  # current hash ('h' parameter)
4264                 'b' => $treebase || '',  # hash base ('hb' parameter)
4265         );
4266         while (@actions) {
4267                 my ($label, $link, $pos) = splice(@actions,0,3);
4268                 # insert
4269                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4270                 # munch munch
4271                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4272                 $arg{$label}{'_href'} = $link;
4273         }
4274
4275         print "<div class=\"page_nav\">\n" .
4276                 (join " | ",
4277                  map { $_ eq $current ?
4278                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4279                  } @navs);
4280         print "<br/>\n$extra<br/>\n" .
4281               "</div>\n";
4282 }
4283
4284 # returns a submenu for the nagivation of the refs views (tags, heads,
4285 # remotes) with the current view disabled and the remotes view only
4286 # available if the feature is enabled
4287 sub format_ref_views {
4288         my ($current) = @_;
4289         my @ref_views = qw{tags heads};
4290         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4291         return join " | ", map {
4292                 $_ eq $current ? $_ :
4293                 $cgi->a({-href => href(action=>$_)}, $_)
4294         } @ref_views
4295 }
4296
4297 sub format_paging_nav {
4298         my ($action, $page, $has_next_link) = @_;
4299         my $paging_nav;
4300
4301
4302         if ($page > 0) {
4303                 $paging_nav .=
4304                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4305                         " &sdot; " .
4306                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4307                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4308         } else {
4309                 $paging_nav .= "first &sdot; prev";
4310         }
4311
4312         if ($has_next_link) {
4313                 $paging_nav .= " &sdot; " .
4314                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4315                                  -accesskey => "n", -title => "Alt-n"}, "next");
4316         } else {
4317                 $paging_nav .= " &sdot; next";
4318         }
4319
4320         return $paging_nav;
4321 }
4322
4323 ## ......................................................................
4324 ## functions printing or outputting HTML: div
4325
4326 sub git_print_header_div {
4327         my ($action, $title, $hash, $hash_base) = @_;
4328         my %args = ();
4329
4330         $args{'action'} = $action;
4331         $args{'hash'} = $hash if $hash;
4332         $args{'hash_base'} = $hash_base if $hash_base;
4333
4334         print "<div class=\"header\">\n" .
4335               $cgi->a({-href => href(%args), -class => "title"},
4336               $title ? $title : $action) .
4337               "\n</div>\n";
4338 }
4339
4340 sub format_repo_url {
4341         my ($name, $url) = @_;
4342         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4343 }
4344
4345 # Group output by placing it in a DIV element and adding a header.
4346 # Options for start_div() can be provided by passing a hash reference as the
4347 # first parameter to the function.
4348 # Options to git_print_header_div() can be provided by passing an array
4349 # reference. This must follow the options to start_div if they are present.
4350 # The content can be a scalar, which is output as-is, a scalar reference, which
4351 # is output after html escaping, an IO handle passed either as *handle or
4352 # *handle{IO}, or a function reference. In the latter case all following
4353 # parameters will be taken as argument to the content function call.
4354 sub git_print_section {
4355         my ($div_args, $header_args, $content);
4356         my $arg = shift;
4357         if (ref($arg) eq 'HASH') {
4358                 $div_args = $arg;
4359                 $arg = shift;
4360         }
4361         if (ref($arg) eq 'ARRAY') {
4362                 $header_args = $arg;
4363                 $arg = shift;
4364         }
4365         $content = $arg;
4366
4367         print $cgi->start_div($div_args);
4368         git_print_header_div(@$header_args);
4369
4370         if (ref($content) eq 'CODE') {
4371                 $content->(@_);
4372         } elsif (ref($content) eq 'SCALAR') {
4373                 print esc_html($$content);
4374         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4375                 print <$content>;
4376         } elsif (!ref($content) && defined($content)) {
4377                 print $content;
4378         }
4379
4380         print $cgi->end_div;
4381 }
4382
4383 sub format_timestamp_html {
4384         my $date = shift;
4385         my $strtime = $date->{'rfc2822'};
4386
4387         my (undef, undef, $datetime_class) =
4388                 gitweb_get_feature('javascript-timezone');
4389         if ($datetime_class) {
4390                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4391         }
4392
4393         my $localtime_format = '(%02d:%02d %s)';
4394         if ($date->{'hour_local'} < 6) {
4395                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4396         }
4397         $strtime .= ' ' .
4398                     sprintf($localtime_format,
4399                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4400
4401         return $strtime;
4402 }
4403
4404 # Outputs the author name and date in long form
4405 sub git_print_authorship {
4406         my $co = shift;
4407         my %opts = @_;
4408         my $tag = $opts{-tag} || 'div';
4409         my $author = $co->{'author_name'};
4410
4411         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4412         print "<$tag class=\"author_date\">" .
4413               format_search_author($author, "author", esc_html($author)) .
4414               " [".format_timestamp_html(\%ad)."]".
4415               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4416               "</$tag>\n";
4417 }
4418
4419 # Outputs table rows containing the full author or committer information,
4420 # in the format expected for 'commit' view (& similar).
4421 # Parameters are a commit hash reference, followed by the list of people
4422 # to output information for. If the list is empty it defaults to both
4423 # author and committer.
4424 sub git_print_authorship_rows {
4425         my $co = shift;
4426         # too bad we can't use @people = @_ || ('author', 'committer')
4427         my @people = @_;
4428         @people = ('author', 'committer') unless @people;
4429         foreach my $who (@people) {
4430                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4431                 print "<tr><td>$who</td><td>" .
4432                       format_search_author($co->{"${who}_name"}, $who,
4433                                            esc_html($co->{"${who}_name"})) . " " .
4434                       format_search_author($co->{"${who}_email"}, $who,
4435                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4436                       "</td><td rowspan=\"2\">" .
4437                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4438                       "</td></tr>\n" .
4439                       "<tr>" .
4440                       "<td></td><td>" .
4441                       format_timestamp_html(\%wd) .
4442                       "</td>" .
4443                       "</tr>\n";
4444         }
4445 }
4446
4447 sub git_print_page_path {
4448         my $name = shift;
4449         my $type = shift;
4450         my $hb = shift;
4451
4452
4453         print "<div class=\"page_path\">";
4454         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4455                       -title => 'tree root'}, to_utf8("[$project]"));
4456         print " / ";
4457         if (defined $name) {
4458                 my @dirname = split '/', $name;
4459                 my $basename = pop @dirname;
4460                 my $fullname = '';
4461
4462                 foreach my $dir (@dirname) {
4463                         $fullname .= ($fullname ? '/' : '') . $dir;
4464                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4465                                                      hash_base=>$hb),
4466                                       -title => $fullname}, esc_path($dir));
4467                         print " / ";
4468                 }
4469                 if (defined $type && $type eq 'blob') {
4470                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4471                                                      hash_base=>$hb),
4472                                       -title => $name}, esc_path($basename));
4473                 } elsif (defined $type && $type eq 'tree') {
4474                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4475                                                      hash_base=>$hb),
4476                                       -title => $name}, esc_path($basename));
4477                         print " / ";
4478                 } else {
4479                         print esc_path($basename);
4480                 }
4481         }
4482         print "<br/></div>\n";
4483 }
4484
4485 sub git_print_log {
4486         my $log = shift;
4487         my %opts = @_;
4488
4489         if ($opts{'-remove_title'}) {
4490                 # remove title, i.e. first line of log
4491                 shift @$log;
4492         }
4493         # remove leading empty lines
4494         while (defined $log->[0] && $log->[0] eq "") {
4495                 shift @$log;
4496         }
4497
4498         # print log
4499         my $skip_blank_line = 0;
4500         foreach my $line (@$log) {
4501                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4502                         if (! $opts{'-remove_signoff'}) {
4503                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4504                                 $skip_blank_line = 1;
4505                         }
4506                         next;
4507                 }
4508
4509                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4510                         if (! $opts{'-remove_signoff'}) {
4511                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4512                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4513                                         "</span><br/>\n";
4514                                 $skip_blank_line = 1;
4515                         }
4516                         next;
4517                 }
4518
4519                 # print only one empty line
4520                 # do not print empty line after signoff
4521                 if ($line eq "") {
4522                         next if ($skip_blank_line);
4523                         $skip_blank_line = 1;
4524                 } else {
4525                         $skip_blank_line = 0;
4526                 }
4527
4528                 print format_log_line_html($line) . "<br/>\n";
4529         }
4530
4531         if ($opts{'-final_empty_line'}) {
4532                 # end with single empty line
4533                 print "<br/>\n" unless $skip_blank_line;
4534         }
4535 }
4536
4537 # return link target (what link points to)
4538 sub git_get_link_target {
4539         my $hash = shift;
4540         my $link_target;
4541
4542         # read link
4543         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4544                 or return;
4545         {
4546                 local $/ = undef;
4547                 $link_target = <$fd>;
4548         }
4549         close $fd
4550                 or return;
4551
4552         return $link_target;
4553 }
4554
4555 # given link target, and the directory (basedir) the link is in,
4556 # return target of link relative to top directory (top tree);
4557 # return undef if it is not possible (including absolute links).
4558 sub normalize_link_target {
4559         my ($link_target, $basedir) = @_;
4560
4561         # absolute symlinks (beginning with '/') cannot be normalized
4562         return if (substr($link_target, 0, 1) eq '/');
4563
4564         # normalize link target to path from top (root) tree (dir)
4565         my $path;
4566         if ($basedir) {
4567                 $path = $basedir . '/' . $link_target;
4568         } else {
4569                 # we are in top (root) tree (dir)
4570                 $path = $link_target;
4571         }
4572
4573         # remove //, /./, and /../
4574         my @path_parts;
4575         foreach my $part (split('/', $path)) {
4576                 # discard '.' and ''
4577                 next if (!$part || $part eq '.');
4578                 # handle '..'
4579                 if ($part eq '..') {
4580                         if (@path_parts) {
4581                                 pop @path_parts;
4582                         } else {
4583                                 # link leads outside repository (outside top dir)
4584                                 return;
4585                         }
4586                 } else {
4587                         push @path_parts, $part;
4588                 }
4589         }
4590         $path = join('/', @path_parts);
4591
4592         return $path;
4593 }
4594
4595 # print tree entry (row of git_tree), but without encompassing <tr> element
4596 sub git_print_tree_entry {
4597         my ($t, $basedir, $hash_base, $have_blame) = @_;
4598
4599         my %base_key = ();
4600         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4601
4602         # The format of a table row is: mode list link.  Where mode is
4603         # the mode of the entry, list is the name of the entry, an href,
4604         # and link is the action links of the entry.
4605
4606         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4607         if (exists $t->{'size'}) {
4608                 print "<td class=\"size\">$t->{'size'}</td>\n";
4609         }
4610         if ($t->{'type'} eq "blob") {
4611                 print "<td class=\"list\">" .
4612                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4613                                                file_name=>"$basedir$t->{'name'}", %base_key),
4614                                 -class => "list"}, esc_path($t->{'name'}));
4615                 if (S_ISLNK(oct $t->{'mode'})) {
4616                         my $link_target = git_get_link_target($t->{'hash'});
4617                         if ($link_target) {
4618                                 my $norm_target = normalize_link_target($link_target, $basedir);
4619                                 if (defined $norm_target) {
4620                                         print " -> " .
4621                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4622                                                                      file_name=>$norm_target),
4623                                                        -title => $norm_target}, esc_path($link_target));
4624                                 } else {
4625                                         print " -> " . esc_path($link_target);
4626                                 }
4627                         }
4628                 }
4629                 print "</td>\n";
4630                 print "<td class=\"link\">";
4631                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4632                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4633                               "blob");
4634                 if ($have_blame) {
4635                         print " | " .
4636                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4637                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4638                                       "blame");
4639                 }
4640                 if (defined $hash_base) {
4641                         print " | " .
4642                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4643                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4644                                       "history");
4645                 }
4646                 print " | " .
4647                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4648                                                file_name=>"$basedir$t->{'name'}")},
4649                                 "raw");
4650                 print "</td>\n";
4651
4652         } elsif ($t->{'type'} eq "tree") {
4653                 print "<td class=\"list\">";
4654                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4655                                              file_name=>"$basedir$t->{'name'}",
4656                                              %base_key)},
4657                               esc_path($t->{'name'}));
4658                 print "</td>\n";
4659                 print "<td class=\"link\">";
4660                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4661                                              file_name=>"$basedir$t->{'name'}",
4662                                              %base_key)},
4663                               "tree");
4664                 if (defined $hash_base) {
4665                         print " | " .
4666                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4667                                                      file_name=>"$basedir$t->{'name'}")},
4668                                       "history");
4669                 }
4670                 print "</td>\n";
4671         } else {
4672                 # unknown object: we can only present history for it
4673                 # (this includes 'commit' object, i.e. submodule support)
4674                 print "<td class=\"list\">" .
4675                       esc_path($t->{'name'}) .
4676                       "</td>\n";
4677                 print "<td class=\"link\">";
4678                 if (defined $hash_base) {
4679                         print $cgi->a({-href => href(action=>"history",
4680                                                      hash_base=>$hash_base,
4681                                                      file_name=>"$basedir$t->{'name'}")},
4682                                       "history");
4683                 }
4684                 print "</td>\n";
4685         }
4686 }
4687
4688 ## ......................................................................
4689 ## functions printing large fragments of HTML
4690
4691 # get pre-image filenames for merge (combined) diff
4692 sub fill_from_file_info {
4693         my ($diff, @parents) = @_;
4694
4695         $diff->{'from_file'} = [ ];
4696         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4697         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4698                 if ($diff->{'status'}[$i] eq 'R' ||
4699                     $diff->{'status'}[$i] eq 'C') {
4700                         $diff->{'from_file'}[$i] =
4701                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4702                 }
4703         }
4704
4705         return $diff;
4706 }
4707
4708 # is current raw difftree line of file deletion
4709 sub is_deleted {
4710         my $diffinfo = shift;
4711
4712         return $diffinfo->{'to_id'} eq ('0' x 40);
4713 }
4714
4715 # does patch correspond to [previous] difftree raw line
4716 # $diffinfo  - hashref of parsed raw diff format
4717 # $patchinfo - hashref of parsed patch diff format
4718 #              (the same keys as in $diffinfo)
4719 sub is_patch_split {
4720         my ($diffinfo, $patchinfo) = @_;
4721
4722         return defined $diffinfo && defined $patchinfo
4723                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4724 }
4725
4726
4727 sub git_difftree_body {
4728         my ($difftree, $hash, @parents) = @_;
4729         my ($parent) = $parents[0];
4730         my $have_blame = gitweb_check_feature('blame');
4731         print "<div class=\"list_head\">\n";
4732         if ($#{$difftree} > 10) {
4733                 print(($#{$difftree} + 1) . " files changed:\n");
4734         }
4735         print "</div>\n";
4736
4737         print "<table class=\"" .
4738               (@parents > 1 ? "combined " : "") .
4739               "diff_tree\">\n";
4740
4741         # header only for combined diff in 'commitdiff' view
4742         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4743         if ($has_header) {
4744                 # table header
4745                 print "<thead><tr>\n" .
4746                        "<th></th><th></th>\n"; # filename, patchN link
4747                 for (my $i = 0; $i < @parents; $i++) {
4748                         my $par = $parents[$i];
4749                         print "<th>" .
4750                               $cgi->a({-href => href(action=>"commitdiff",
4751                                                      hash=>$hash, hash_parent=>$par),
4752                                        -title => 'commitdiff to parent number ' .
4753                                                   ($i+1) . ': ' . substr($par,0,7)},
4754                                       $i+1) .
4755                               "&nbsp;</th>\n";
4756                 }
4757                 print "</tr></thead>\n<tbody>\n";
4758         }
4759
4760         my $alternate = 1;
4761         my $patchno = 0;
4762         foreach my $line (@{$difftree}) {
4763                 my $diff = parsed_difftree_line($line);
4764
4765                 if ($alternate) {
4766                         print "<tr class=\"dark\">\n";
4767                 } else {
4768                         print "<tr class=\"light\">\n";
4769                 }
4770                 $alternate ^= 1;
4771
4772                 if (exists $diff->{'nparents'}) { # combined diff
4773
4774                         fill_from_file_info($diff, @parents)
4775                                 unless exists $diff->{'from_file'};
4776
4777                         if (!is_deleted($diff)) {
4778                                 # file exists in the result (child) commit
4779                                 print "<td>" .
4780                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4781                                                              file_name=>$diff->{'to_file'},
4782                                                              hash_base=>$hash),
4783                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4784                                       "</td>\n";
4785                         } else {
4786                                 print "<td>" .
4787                                       esc_path($diff->{'to_file'}) .
4788                                       "</td>\n";
4789                         }
4790
4791                         if ($action eq 'commitdiff') {
4792                                 # link to patch
4793                                 $patchno++;
4794                                 print "<td class=\"link\">" .
4795                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4796                                               "patch") .
4797                                       " | " .
4798                                       "</td>\n";
4799                         }
4800
4801                         my $has_history = 0;
4802                         my $not_deleted = 0;
4803                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4804                                 my $hash_parent = $parents[$i];
4805                                 my $from_hash = $diff->{'from_id'}[$i];
4806                                 my $from_path = $diff->{'from_file'}[$i];
4807                                 my $status = $diff->{'status'}[$i];
4808
4809                                 $has_history ||= ($status ne 'A');
4810                                 $not_deleted ||= ($status ne 'D');
4811
4812                                 if ($status eq 'A') {
4813                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4814                                 } elsif ($status eq 'D') {
4815                                         print "<td class=\"link\">" .
4816                                               $cgi->a({-href => href(action=>"blob",
4817                                                                      hash_base=>$hash,
4818                                                                      hash=>$from_hash,
4819                                                                      file_name=>$from_path)},
4820                                                       "blob" . ($i+1)) .
4821                                               " | </td>\n";
4822                                 } else {
4823                                         if ($diff->{'to_id'} eq $from_hash) {
4824                                                 print "<td class=\"link nochange\">";
4825                                         } else {
4826                                                 print "<td class=\"link\">";
4827                                         }
4828                                         print $cgi->a({-href => href(action=>"blobdiff",
4829                                                                      hash=>$diff->{'to_id'},
4830                                                                      hash_parent=>$from_hash,
4831                                                                      hash_base=>$hash,
4832                                                                      hash_parent_base=>$hash_parent,
4833                                                                      file_name=>$diff->{'to_file'},
4834                                                                      file_parent=>$from_path)},
4835                                                       "diff" . ($i+1)) .
4836                                               " | </td>\n";
4837                                 }
4838                         }
4839
4840                         print "<td class=\"link\">";
4841                         if ($not_deleted) {
4842                                 print $cgi->a({-href => href(action=>"blob",
4843                                                              hash=>$diff->{'to_id'},
4844                                                              file_name=>$diff->{'to_file'},
4845                                                              hash_base=>$hash)},
4846                                               "blob");
4847                                 print " | " if ($has_history);
4848                         }
4849                         if ($has_history) {
4850                                 print $cgi->a({-href => href(action=>"history",
4851                                                              file_name=>$diff->{'to_file'},
4852                                                              hash_base=>$hash)},
4853                                               "history");
4854                         }
4855                         print "</td>\n";
4856
4857                         print "</tr>\n";
4858                         next; # instead of 'else' clause, to avoid extra indent
4859                 }
4860                 # else ordinary diff
4861
4862                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4863                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4864                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4865                         $to_mode_oct = oct $diff->{'to_mode'};
4866                         if (S_ISREG($to_mode_oct)) { # only for regular file
4867                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4868                         }
4869                         $to_file_type = file_type($diff->{'to_mode'});
4870                 }
4871                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4872                         $from_mode_oct = oct $diff->{'from_mode'};
4873                         if (S_ISREG($from_mode_oct)) { # only for regular file
4874                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4875                         }
4876                         $from_file_type = file_type($diff->{'from_mode'});
4877                 }
4878
4879                 if ($diff->{'status'} eq "A") { # created
4880                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4881                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4882                         $mode_chng   .= "]</span>";
4883                         print "<td>";
4884                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4885                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4886                                       -class => "list"}, esc_path($diff->{'file'}));
4887                         print "</td>\n";
4888                         print "<td>$mode_chng</td>\n";
4889                         print "<td class=\"link\">";
4890                         if ($action eq 'commitdiff') {
4891                                 # link to patch
4892                                 $patchno++;
4893                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4894                                               "patch") .
4895                                       " | ";
4896                         }
4897                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4898                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4899                                       "blob");
4900                         print "</td>\n";
4901
4902                 } elsif ($diff->{'status'} eq "D") { # deleted
4903                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4904                         print "<td>";
4905                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4906                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4907                                        -class => "list"}, esc_path($diff->{'file'}));
4908                         print "</td>\n";
4909                         print "<td>$mode_chng</td>\n";
4910                         print "<td class=\"link\">";
4911                         if ($action eq 'commitdiff') {
4912                                 # link to patch
4913                                 $patchno++;
4914                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4915                                               "patch") .
4916                                       " | ";
4917                         }
4918                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4919                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4920                                       "blob") . " | ";
4921                         if ($have_blame) {
4922                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4923                                                              file_name=>$diff->{'file'})},
4924                                               "blame") . " | ";
4925                         }
4926                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4927                                                      file_name=>$diff->{'file'})},
4928                                       "history");
4929                         print "</td>\n";
4930
4931                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4932                         my $mode_chnge = "";
4933                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4934                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4935                                 if ($from_file_type ne $to_file_type) {
4936                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4937                                 }
4938                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4939                                         if ($from_mode_str && $to_mode_str) {
4940                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4941                                         } elsif ($to_mode_str) {
4942                                                 $mode_chnge .= " mode: $to_mode_str";
4943                                         }
4944                                 }
4945                                 $mode_chnge .= "]</span>\n";
4946                         }
4947                         print "<td>";
4948                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4949                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4950                                       -class => "list"}, esc_path($diff->{'file'}));
4951                         print "</td>\n";
4952                         print "<td>$mode_chnge</td>\n";
4953                         print "<td class=\"link\">";
4954                         if ($action eq 'commitdiff') {
4955                                 # link to patch
4956                                 $patchno++;
4957                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4958                                               "patch") .
4959                                       " | ";
4960                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4961                                 # "commit" view and modified file (not onlu mode changed)
4962                                 print $cgi->a({-href => href(action=>"blobdiff",
4963                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4964                                                              hash_base=>$hash, hash_parent_base=>$parent,
4965                                                              file_name=>$diff->{'file'})},
4966                                               "diff") .
4967                                       " | ";
4968                         }
4969                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4970                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4971                                        "blob") . " | ";
4972                         if ($have_blame) {
4973                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4974                                                              file_name=>$diff->{'file'})},
4975                                               "blame") . " | ";
4976                         }
4977                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4978                                                      file_name=>$diff->{'file'})},
4979                                       "history");
4980                         print "</td>\n";
4981
4982                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4983                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4984                         my $nstatus = $status_name{$diff->{'status'}};
4985                         my $mode_chng = "";
4986                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4987                                 # mode also for directories, so we cannot use $to_mode_str
4988                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4989                         }
4990                         print "<td>" .
4991                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4992                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4993                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4994                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4995                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4996                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4997                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4998                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4999                               "<td class=\"link\">";
5000                         if ($action eq 'commitdiff') {
5001                                 # link to patch
5002                                 $patchno++;
5003                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5004                                               "patch") .
5005                                       " | ";
5006                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5007                                 # "commit" view and modified file (not only pure rename or copy)
5008                                 print $cgi->a({-href => href(action=>"blobdiff",
5009                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5010                                                              hash_base=>$hash, hash_parent_base=>$parent,
5011                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5012                                               "diff") .
5013                                       " | ";
5014                         }
5015                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5016                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5017                                       "blob") . " | ";
5018                         if ($have_blame) {
5019                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5020                                                              file_name=>$diff->{'to_file'})},
5021                                               "blame") . " | ";
5022                         }
5023                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5024                                                     file_name=>$diff->{'to_file'})},
5025                                       "history");
5026                         print "</td>\n";
5027
5028                 } # we should not encounter Unmerged (U) or Unknown (X) status
5029                 print "</tr>\n";
5030         }
5031         print "</tbody>" if $has_header;
5032         print "</table>\n";
5033 }
5034
5035 # Print context lines and then rem/add lines in a side-by-side manner.
5036 sub print_sidebyside_diff_lines {
5037         my ($ctx, $rem, $add) = @_;
5038
5039         # print context block before add/rem block
5040         if (@$ctx) {
5041                 print join '',
5042                         '<div class="chunk_block ctx">',
5043                                 '<div class="old">',
5044                                 @$ctx,
5045                                 '</div>',
5046                                 '<div class="new">',
5047                                 @$ctx,
5048                                 '</div>',
5049                         '</div>';
5050         }
5051
5052         if (!@$add) {
5053                 # pure removal
5054                 print join '',
5055                         '<div class="chunk_block rem">',
5056                                 '<div class="old">',
5057                                 @$rem,
5058                                 '</div>',
5059                         '</div>';
5060         } elsif (!@$rem) {
5061                 # pure addition
5062                 print join '',
5063                         '<div class="chunk_block add">',
5064                                 '<div class="new">',
5065                                 @$add,
5066                                 '</div>',
5067                         '</div>';
5068         } else {
5069                 print join '',
5070                         '<div class="chunk_block chg">',
5071                                 '<div class="old">',
5072                                 @$rem,
5073                                 '</div>',
5074                                 '<div class="new">',
5075                                 @$add,
5076                                 '</div>',
5077                         '</div>';
5078         }
5079 }
5080
5081 # Print context lines and then rem/add lines in inline manner.
5082 sub print_inline_diff_lines {
5083         my ($ctx, $rem, $add) = @_;
5084
5085         print @$ctx, @$rem, @$add;
5086 }
5087
5088 # Format removed and added line, mark changed part and HTML-format them.
5089 # Implementation is based on contrib/diff-highlight
5090 sub format_rem_add_lines_pair {
5091         my ($rem, $add, $num_parents) = @_;
5092
5093         # We need to untabify lines before split()'ing them;
5094         # otherwise offsets would be invalid.
5095         chomp $rem;
5096         chomp $add;
5097         $rem = untabify($rem);
5098         $add = untabify($add);
5099
5100         my @rem = split(//, $rem);
5101         my @add = split(//, $add);
5102         my ($esc_rem, $esc_add);
5103         # Ignore leading +/- characters for each parent.
5104         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5105         my ($prefix_has_nonspace, $suffix_has_nonspace);
5106
5107         my $shorter = (@rem < @add) ? @rem : @add;
5108         while ($prefix_len < $shorter) {
5109                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5110
5111                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5112                 $prefix_len++;
5113         }
5114
5115         while ($prefix_len + $suffix_len < $shorter) {
5116                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5117
5118                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5119                 $suffix_len++;
5120         }
5121
5122         # Mark lines that are different from each other, but have some common
5123         # part that isn't whitespace.  If lines are completely different, don't
5124         # mark them because that would make output unreadable, especially if
5125         # diff consists of multiple lines.
5126         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5127                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5128                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5129                 $esc_add = esc_html_hl_regions($add, 'marked',
5130                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5131         } else {
5132                 $esc_rem = esc_html($rem, -nbsp=>1);
5133                 $esc_add = esc_html($add, -nbsp=>1);
5134         }
5135
5136         return format_diff_line(\$esc_rem, 'rem'),
5137                format_diff_line(\$esc_add, 'add');
5138 }
5139
5140 # HTML-format diff context, removed and added lines.
5141 sub format_ctx_rem_add_lines {
5142         my ($ctx, $rem, $add, $num_parents) = @_;
5143         my (@new_ctx, @new_rem, @new_add);
5144         my $can_highlight = 0;
5145         my $is_combined = ($num_parents > 1);
5146
5147         # Highlight if every removed line has a corresponding added line.
5148         if (@$add > 0 && @$add == @$rem) {
5149                 $can_highlight = 1;
5150
5151                 # Highlight lines in combined diff only if the chunk contains
5152                 # diff between the same version, e.g.
5153                 #
5154                 #    - a
5155                 #   -  b
5156                 #    + c
5157                 #   +  d
5158                 #
5159                 # Otherwise the highlightling would be confusing.
5160                 if ($is_combined) {
5161                         for (my $i = 0; $i < @$add; $i++) {
5162                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5163                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5164
5165                                 $prefix_rem =~ s/-/+/g;
5166
5167                                 if ($prefix_rem ne $prefix_add) {
5168                                         $can_highlight = 0;
5169                                         last;
5170                                 }
5171                         }
5172                 }
5173         }
5174
5175         if ($can_highlight) {
5176                 for (my $i = 0; $i < @$add; $i++) {
5177                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5178                                 $rem->[$i], $add->[$i], $num_parents);
5179                         push @new_rem, $line_rem;
5180                         push @new_add, $line_add;
5181                 }
5182         } else {
5183                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5184                 @new_add = map { format_diff_line($_, 'add') } @$add;
5185         }
5186
5187         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5188
5189         return (\@new_ctx, \@new_rem, \@new_add);
5190 }
5191
5192 # Print context lines and then rem/add lines.
5193 sub print_diff_lines {
5194         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5195         my $is_combined = $num_parents > 1;
5196
5197         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5198                 $num_parents);
5199
5200         if ($diff_style eq 'sidebyside' && !$is_combined) {
5201                 print_sidebyside_diff_lines($ctx, $rem, $add);
5202         } else {
5203                 # default 'inline' style and unknown styles
5204                 print_inline_diff_lines($ctx, $rem, $add);
5205         }
5206 }
5207
5208 sub print_diff_chunk {
5209         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5210         my (@ctx, @rem, @add);
5211
5212         # The class of the previous line.
5213         my $prev_class = '';
5214
5215         return unless @chunk;
5216
5217         # incomplete last line might be among removed or added lines,
5218         # or both, or among context lines: find which
5219         for (my $i = 1; $i < @chunk; $i++) {
5220                 if ($chunk[$i][0] eq 'incomplete') {
5221                         $chunk[$i][0] = $chunk[$i-1][0];
5222                 }
5223         }
5224
5225         # guardian
5226         push @chunk, ["", ""];
5227
5228         foreach my $line_info (@chunk) {
5229                 my ($class, $line) = @$line_info;
5230
5231                 # print chunk headers
5232                 if ($class && $class eq 'chunk_header') {
5233                         print format_diff_line($line, $class, $from, $to);
5234                         next;
5235                 }
5236
5237                 ## print from accumulator when have some add/rem lines or end
5238                 # of chunk (flush context lines), or when have add and rem
5239                 # lines and new block is reached (otherwise add/rem lines could
5240                 # be reordered)
5241                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5242                     (@rem && @add && $class ne $prev_class)) {
5243                         print_diff_lines(\@ctx, \@rem, \@add,
5244                                          $diff_style, $num_parents);
5245                         @ctx = @rem = @add = ();
5246                 }
5247
5248                 ## adding lines to accumulator
5249                 # guardian value
5250                 last unless $line;
5251                 # rem, add or change
5252                 if ($class eq 'rem') {
5253                         push @rem, $line;
5254                 } elsif ($class eq 'add') {
5255                         push @add, $line;
5256                 }
5257                 # context line
5258                 if ($class eq 'ctx') {
5259                         push @ctx, $line;
5260                 }
5261
5262                 $prev_class = $class;
5263         }
5264 }
5265
5266 sub git_patchset_body {
5267         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5268         my ($hash_parent) = $hash_parents[0];
5269
5270         my $is_combined = (@hash_parents > 1);
5271         my $patch_idx = 0;
5272         my $patch_number = 0;
5273         my $patch_line;
5274         my $diffinfo;
5275         my $to_name;
5276         my (%from, %to);
5277         my @chunk; # for side-by-side diff
5278
5279         print "<div class=\"patchset\">\n";
5280
5281         # skip to first patch
5282         while ($patch_line = <$fd>) {
5283                 chomp $patch_line;
5284
5285                 last if ($patch_line =~ m/^diff /);
5286         }
5287
5288  PATCH:
5289         while ($patch_line) {
5290
5291                 # parse "git diff" header line
5292                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5293                         # $1 is from_name, which we do not use
5294                         $to_name = unquote($2);
5295                         $to_name =~ s!^b/!!;
5296                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5297                         # $1 is 'cc' or 'combined', which we do not use
5298                         $to_name = unquote($2);
5299                 } else {
5300                         $to_name = undef;
5301                 }
5302
5303                 # check if current patch belong to current raw line
5304                 # and parse raw git-diff line if needed
5305                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5306                         # this is continuation of a split patch
5307                         print "<div class=\"patch cont\">\n";
5308                 } else {
5309                         # advance raw git-diff output if needed
5310                         $patch_idx++ if defined $diffinfo;
5311
5312                         # read and prepare patch information
5313                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5314
5315                         # compact combined diff output can have some patches skipped
5316                         # find which patch (using pathname of result) we are at now;
5317                         if ($is_combined) {
5318                                 while ($to_name ne $diffinfo->{'to_file'}) {
5319                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5320                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5321                                               "</div>\n";  # class="patch"
5322
5323                                         $patch_idx++;
5324                                         $patch_number++;
5325
5326                                         last if $patch_idx > $#$difftree;
5327                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5328                                 }
5329                         }
5330
5331                         # modifies %from, %to hashes
5332                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5333
5334                         # this is first patch for raw difftree line with $patch_idx index
5335                         # we index @$difftree array from 0, but number patches from 1
5336                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5337                 }
5338
5339                 # git diff header
5340                 #assert($patch_line =~ m/^diff /) if DEBUG;
5341                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5342                 $patch_number++;
5343                 # print "git diff" header
5344                 print format_git_diff_header_line($patch_line, $diffinfo,
5345                                                   \%from, \%to);
5346
5347                 # print extended diff header
5348                 print "<div class=\"diff extended_header\">\n";
5349         EXTENDED_HEADER:
5350                 while ($patch_line = <$fd>) {
5351                         chomp $patch_line;
5352
5353                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5354
5355                         print format_extended_diff_header_line($patch_line, $diffinfo,
5356                                                                \%from, \%to);
5357                 }
5358                 print "</div>\n"; # class="diff extended_header"
5359
5360                 # from-file/to-file diff header
5361                 if (! $patch_line) {
5362                         print "</div>\n"; # class="patch"
5363                         last PATCH;
5364                 }
5365                 next PATCH if ($patch_line =~ m/^diff /);
5366                 #assert($patch_line =~ m/^---/) if DEBUG;
5367
5368                 my $last_patch_line = $patch_line;
5369                 $patch_line = <$fd>;
5370                 chomp $patch_line;
5371                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5372
5373                 print format_diff_from_to_header($last_patch_line, $patch_line,
5374                                                  $diffinfo, \%from, \%to,
5375                                                  @hash_parents);
5376
5377                 # the patch itself
5378         LINE:
5379                 while ($patch_line = <$fd>) {
5380                         chomp $patch_line;
5381
5382                         next PATCH if ($patch_line =~ m/^diff /);
5383
5384                         my $class = diff_line_class($patch_line, \%from, \%to);
5385
5386                         if ($class eq 'chunk_header') {
5387                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5388                                 @chunk = ();
5389                         }
5390
5391                         push @chunk, [ $class, $patch_line ];
5392                 }
5393
5394         } continue {
5395                 if (@chunk) {
5396                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5397                         @chunk = ();
5398                 }
5399                 print "</div>\n"; # class="patch"
5400         }
5401
5402         # for compact combined (--cc) format, with chunk and patch simplification
5403         # the patchset might be empty, but there might be unprocessed raw lines
5404         for (++$patch_idx if $patch_number > 0;
5405              $patch_idx < @$difftree;
5406              ++$patch_idx) {
5407                 # read and prepare patch information
5408                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5409
5410                 # generate anchor for "patch" links in difftree / whatchanged part
5411                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5412                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5413                       "</div>\n";  # class="patch"
5414
5415                 $patch_number++;
5416         }
5417
5418         if ($patch_number == 0) {
5419                 if (@hash_parents > 1) {
5420                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5421                 } else {
5422                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5423                 }
5424         }
5425
5426         print "</div>\n"; # class="patchset"
5427 }
5428
5429 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5430
5431 sub git_project_search_form {
5432         my ($searchtext, $search_use_regexp) = @_;
5433
5434         my $limit = '';
5435         if ($project_filter) {
5436                 $limit = " in '$project_filter/'";
5437         }
5438
5439         print "<div class=\"projsearch\">\n";
5440         print $cgi->startform(-method => 'get', -action => $my_uri) .
5441               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5442         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5443                 if (defined $project_filter);
5444         print $cgi->textfield(-name => 's', -value => $searchtext,
5445                               -title => "Search project by name and description$limit",
5446                               -size => 60) . "\n" .
5447               "<span title=\"Extended regular expression\">" .
5448               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5449                              -checked => $search_use_regexp) .
5450               "</span>\n" .
5451               $cgi->submit(-name => 'btnS', -value => 'Search') .
5452               $cgi->end_form() . "\n" .
5453               $cgi->a({-href => href(project => undef, searchtext => undef,
5454                                      project_filter => $project_filter)},
5455                       esc_html("List all projects$limit")) . "<br />\n";
5456         print "</div>\n";
5457 }
5458
5459 # entry for given @keys needs filling if at least one of keys in list
5460 # is not present in %$project_info
5461 sub project_info_needs_filling {
5462         my ($project_info, @keys) = @_;
5463
5464         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5465         foreach my $key (@keys) {
5466                 if (!exists $project_info->{$key}) {
5467                         return 1;
5468                 }
5469         }
5470         return;
5471 }
5472
5473 # fills project list info (age, description, owner, category, forks, etc.)
5474 # for each project in the list, removing invalid projects from
5475 # returned list, or fill only specified info.
5476 #
5477 # Invalid projects are removed from the returned list if and only if you
5478 # ask 'age' or 'age_string' to be filled, because they are the only fields
5479 # that run unconditionally git command that requires repository, and
5480 # therefore do always check if project repository is invalid.
5481 #
5482 # USAGE:
5483 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5484 #   ensures that 'descr_long' and 'ctags' fields are filled
5485 # * @project_list = fill_project_list_info(\@project_list)
5486 #   ensures that all fields are filled (and invalid projects removed)
5487 #
5488 # NOTE: modifies $projlist, but does not remove entries from it
5489 sub fill_project_list_info {
5490         my ($projlist, @wanted_keys) = @_;
5491         my @projects;
5492         my $filter_set = sub { return @_; };
5493         if (@wanted_keys) {
5494                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5495                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5496         }
5497
5498         my $show_ctags = gitweb_check_feature('ctags');
5499  PROJECT:
5500         foreach my $pr (@$projlist) {
5501                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5502                         my (@activity) = git_get_last_activity($pr->{'path'});
5503                         unless (@activity) {
5504                                 next PROJECT;
5505                         }
5506                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5507                 }
5508                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5509                         my $descr = git_get_project_description($pr->{'path'}) || "";
5510                         $descr = to_utf8($descr);
5511                         $pr->{'descr_long'} = $descr;
5512                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5513                 }
5514                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5515                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5516                 }
5517                 if ($show_ctags &&
5518                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5519                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5520                 }
5521                 if ($projects_list_group_categories &&
5522                     project_info_needs_filling($pr, $filter_set->('category'))) {
5523                         my $cat = git_get_project_category($pr->{'path'}) ||
5524                                                            $project_list_default_category;
5525                         $pr->{'category'} = to_utf8($cat);
5526                 }
5527
5528                 push @projects, $pr;
5529         }
5530
5531         return @projects;
5532 }
5533
5534 sub sort_projects_list {
5535         my ($projlist, $order) = @_;
5536
5537         sub order_str {
5538                 my $key = shift;
5539                 return sub { $a->{$key} cmp $b->{$key} };
5540         }
5541
5542         sub order_num_then_undef {
5543                 my $key = shift;
5544                 return sub {
5545                         defined $a->{$key} ?
5546                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5547                                 (defined $b->{$key} ? 1 : 0)
5548                 };
5549         }
5550
5551         my %orderings = (
5552                 project => order_str('path'),
5553                 descr => order_str('descr_long'),
5554                 owner => order_str('owner'),
5555                 age => order_num_then_undef('age'),
5556         );
5557
5558         my $ordering = $orderings{$order};
5559         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5560 }
5561
5562 # returns a hash of categories, containing the list of project
5563 # belonging to each category
5564 sub build_projlist_by_category {
5565         my ($projlist, $from, $to) = @_;
5566         my %categories;
5567
5568         $from = 0 unless defined $from;
5569         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5570
5571         for (my $i = $from; $i <= $to; $i++) {
5572                 my $pr = $projlist->[$i];
5573                 push @{$categories{ $pr->{'category'} }}, $pr;
5574         }
5575
5576         return wantarray ? %categories : \%categories;
5577 }
5578
5579 # print 'sort by' <th> element, generating 'sort by $name' replay link
5580 # if that order is not selected
5581 sub print_sort_th {
5582         print format_sort_th(@_);
5583 }
5584
5585 sub format_sort_th {
5586         my ($name, $order, $header) = @_;
5587         my $sort_th = "";
5588         $header ||= ucfirst($name);
5589
5590         if ($order eq $name) {
5591                 $sort_th .= "<th>$header</th>\n";
5592         } else {
5593                 $sort_th .= "<th>" .
5594                             $cgi->a({-href => href(-replay=>1, order=>$name),
5595                                      -class => "header"}, $header) .
5596                             "</th>\n";
5597         }
5598
5599         return $sort_th;
5600 }
5601
5602 sub git_project_list_rows {
5603         my ($projlist, $from, $to, $check_forks) = @_;
5604
5605         $from = 0 unless defined $from;
5606         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5607
5608         my $alternate = 1;
5609         for (my $i = $from; $i <= $to; $i++) {
5610                 my $pr = $projlist->[$i];
5611
5612                 if ($alternate) {
5613                         print "<tr class=\"dark\">\n";
5614                 } else {
5615                         print "<tr class=\"light\">\n";
5616                 }
5617                 $alternate ^= 1;
5618
5619                 if ($check_forks) {
5620                         print "<td>";
5621                         if ($pr->{'forks'}) {
5622                                 my $nforks = scalar @{$pr->{'forks'}};
5623                                 if ($nforks > 0) {
5624                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5625                                                        -title => "$nforks forks"}, "+");
5626                                 } else {
5627                                         print $cgi->span({-title => "$nforks forks"}, "+");
5628                                 }
5629                         }
5630                         print "</td>\n";
5631                 }
5632                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5633                                         -class => "list"},
5634                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5635                       "</td>\n" .
5636                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5637                                         -class => "list",
5638                                         -title => $pr->{'descr_long'}},
5639                                         $search_regexp
5640                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5641                                                                     $pr->{'descr'}, $search_regexp)
5642                                         : esc_html($pr->{'descr'})) .
5643                       "</td>\n";
5644                 unless ($omit_owner) {
5645                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5646                 }
5647                 unless ($omit_age_column) {
5648                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5649                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5650                 }
5651                 print"<td class=\"link\">" .
5652                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5653                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5654                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5655                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5656                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5657                       "</td>\n" .
5658                       "</tr>\n";
5659         }
5660         print '<tr><td colspan="'.($check_forks ? '1' : '2').'">&nbsp;</td>';
5661         print "<td>".($to + 1)." project".($to > 1 ? ($to < 1 ? "" : "s") : "")." found</td><td colspan=\"3\">&nbsp;</td></tr>";
5662 }
5663
5664 sub git_project_list_body {
5665         # actually uses global variable $project
5666         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5667         my @projects = @$projlist;
5668
5669         my $check_forks = gitweb_check_feature('forks');
5670         my $show_ctags  = gitweb_check_feature('ctags');
5671         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5672         $check_forks = undef
5673                 if ($tagfilter || $search_regexp);
5674
5675         # filtering out forks before filling info allows to do less work
5676         @projects = filter_forks_from_projects_list(\@projects)
5677                 if ($check_forks);
5678         # search_projects_list pre-fills required info
5679         @projects = search_projects_list(\@projects,
5680                                          'search_regexp' => $search_regexp,
5681                                          'tagfilter'  => $tagfilter)
5682                 if ($tagfilter || $search_regexp);
5683         # fill the rest
5684         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5685         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5686         push @all_fields, 'owner' unless($omit_owner);
5687         @projects = fill_project_list_info(\@projects, @all_fields);
5688
5689         $order ||= $default_projects_order;
5690         $from = 0 unless defined $from;
5691         $to = $#projects if (!defined $to || $#projects < $to);
5692
5693         # short circuit
5694         if ($from > $to) {
5695                 print "<center>\n".
5696                       "<b>No such projects found</b><br />\n".
5697                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5698                       "</center>\n<br />\n";
5699                 return;
5700         }
5701
5702         @projects = sort_projects_list(\@projects, $order);
5703
5704         if ($show_ctags) {
5705                 my $ctags = git_gather_all_ctags(\@projects);
5706                 my $cloud = git_populate_project_tagcloud($ctags);
5707                 print git_show_project_tagcloud($cloud, 64);
5708         }
5709
5710         print "<table class=\"project_list\">\n";
5711         unless ($no_header) {
5712                 print "<tr>\n";
5713                 if ($check_forks) {
5714                         print "<th></th>\n";
5715                 }
5716                 print_sort_th('project', $order, 'Project');
5717                 print_sort_th('descr', $order, 'Description');
5718                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5719                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5720                 print "<th></th>\n" . # for links
5721                       "</tr>\n";
5722         }
5723
5724         if ($projects_list_group_categories) {
5725                 # only display categories with projects in the $from-$to window
5726                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5727                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5728                 foreach my $cat (sort keys %categories) {
5729                         unless ($cat eq "") {
5730                                 print "<tr>\n";
5731                                 if ($check_forks) {
5732                                         print "<td></td>\n";
5733                                 }
5734                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5735                                 print "</tr>\n";
5736                         }
5737
5738                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5739                 }
5740         } else {
5741                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5742         }
5743
5744         if (defined $extra) {
5745                 print "<tr>\n";
5746                 if ($check_forks) {
5747                         print "<td></td>\n";
5748                 }
5749                 print "<td colspan=\"5\">$extra</td>\n" .
5750                       "</tr>\n";
5751         }
5752         print "</table>\n";
5753 }
5754
5755 sub git_log_body {
5756         # uses global variable $project
5757         my ($commitlist, $from, $to, $refs, $extra) = @_;
5758
5759         $from = 0 unless defined $from;
5760         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5761
5762         for (my $i = 0; $i <= $to; $i++) {
5763                 my %co = %{$commitlist->[$i]};
5764                 next if !%co;
5765                 my $commit = $co{'id'};
5766                 my $ref = format_ref_marker($refs, $commit);
5767                 git_print_header_div('commit',
5768                                "<span class=\"age\">$co{'age_string'}</span>" .
5769                                esc_html($co{'title'}) . $ref,
5770                                $commit);
5771                 print "<div class=\"title_text\">\n" .
5772                       "<div class=\"log_link\">\n" .
5773                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5774                       " | " .
5775                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5776                       " | " .
5777                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5778                       "<br/>\n" .
5779                       "</div>\n";
5780                       git_print_authorship(\%co, -tag => 'span');
5781                       print "<br/>\n</div>\n";
5782
5783                 print "<div class=\"log_body\">\n";
5784                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5785                 print "</div>\n";
5786         }
5787         if ($extra) {
5788                 print "<div class=\"page_nav\">\n";
5789                 print "$extra\n";
5790                 print "</div>\n";
5791         }
5792 }
5793
5794 sub git_shortlog_body {
5795         # uses global variable $project
5796         my ($commitlist, $from, $to, $refs, $extra, $file_name, $file_hash, $ftype, $allrefs) = @_;
5797
5798         $from = 0 unless defined $from;
5799         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5800
5801         print "<table class=\"shortlog\" cellspacing=\"0\" cellpadding=\"0\">\n";
5802         my $alternate = 1;
5803         my $graph_rand = int(rand(99999));
5804         my $head = git_get_head_hash($project);
5805         my $graph_hash;
5806         if (defined $allrefs && $allrefs == 1) {
5807                 $graph_hash = "all";
5808         }
5809         if (!defined $hash) {
5810                 $hash = $head;
5811         }
5812         if(!defined $graph_hash) {
5813                 $graph_hash = $hash;
5814         }
5815         if (!defined $page) {
5816                 $page = 0;
5817         }
5818         print "<tr class=\"header\">\n";
5819         print "<td colspan=\"2\"><img class=\"graph\" src=\"git_graph.php?r=".$graph_rand.";p=".$project.";h=".$graph_hash.";from=".($from + (100 * $page)).";to=".($to + (100 * $page)).";c=header\" /></td>\n";
5820         print "<td valign=\"bottom\"><b>Author</b></td>\n";
5821         print "<td valign=\"bottom\"><b>Commit</b></td>\n";
5822         print "<td></td>\n";
5823         print "</tr>\n";
5824
5825         for (my $i = $from; $i <= $to; $i++) {
5826                 my %co = %{$commitlist->[$i]};
5827                 my $commit = $co{'id'};
5828                 my $ref = format_ref_marker($refs, $commit);
5829                 if ($alternate) {
5830                         print "<tr class=\"dark\">\n";
5831                 } else {
5832                         print "<tr class=\"light\">\n";
5833                 }
5834                 $alternate ^= 1;
5835                 print "<td><img class=\"graph\" src=\"git_graph.php?r=".$graph_rand.";p=".$project.";h=".$graph_hash.";from=".($from + (100 * $page)).";to=".($to + (100 * $page)).";c=".$commit."\" /></td>";
5836                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5837                 print "<td class=\"". age_class($co{'age'}) . "\" title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5838                       format_author_html('td', \%co, 10) . "<td>";
5839                 print format_subject_html($co{'title'}, $co{'title_short'},
5840                                           href(action=>"commit", hash=>$commit), $ref);
5841                 print "</td>\n" .
5842                       "<td class=\"link\">" .
5843                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5844                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5845                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5846                 my $snapshot_links = format_snapshot_links($commit);
5847                 if (defined $snapshot_links) {
5848                         print " | " . $snapshot_links;
5849                 }
5850                 print "</td>\n" .
5851                       "</tr>\n";
5852         }
5853         if (defined $extra) {
5854                 print "<tr>\n" .
5855                       "<td colspan=\"4\">$extra</td>\n" .
5856                       "</tr>\n";
5857         }
5858         print "</table>\n";
5859 }
5860
5861 sub git_history_body {
5862         # Warning: assumes constant type (blob or tree) during history
5863         my ($commitlist, $from, $to, $refs, $extra,
5864             $file_name, $file_hash, $ftype) = @_;
5865
5866         $from = 0 unless defined $from;
5867         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5868
5869         print "<table class=\"history\">\n";
5870         my $alternate = 1;
5871         for (my $i = $from; $i <= $to; $i++) {
5872                 my %co = %{$commitlist->[$i]};
5873                 if (!%co) {
5874                         next;
5875                 }
5876                 my $commit = $co{'id'};
5877
5878                 my $ref = format_ref_marker($refs, $commit);
5879
5880                 if ($alternate) {
5881                         print "<tr class=\"dark\">\n";
5882                 } else {
5883                         print "<tr class=\"light\">\n";
5884                 }
5885                 $alternate ^= 1;
5886                 print "<td class=\"". age_class($co{'age'}) . "\" title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5887         # shortlog:   format_author_html('td', \%co, 10)
5888                       format_author_html('td', \%co, 15, 3) . "<td>";
5889                 # originally git_history used chop_str($co{'title'}, 50)
5890                 print format_subject_html($co{'title'}, $co{'title_short'},
5891                                           href(action=>"commit", hash=>$commit), $ref);
5892                 print "</td>\n" .
5893                       "<td class=\"link\">" .
5894                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5895                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5896
5897                 if ($ftype eq 'blob') {
5898                         my $blob_current = $file_hash;
5899                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5900                         if (defined $blob_current && defined $blob_parent &&
5901                                         $blob_current ne $blob_parent) {
5902                                 print " | " .
5903                                         $cgi->a({-href => href(action=>"blobdiff",
5904                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5905                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5906                                                                file_name=>$file_name)},
5907                                                 "diff to current");
5908                         }
5909                 }
5910                 print "</td>\n" .
5911                       "</tr>\n";
5912         }
5913         if (defined $extra) {
5914                 print "<tr>\n" .
5915                       "<td colspan=\"4\">$extra</td>\n" .
5916                       "</tr>\n";
5917         }
5918         print "</table>\n";
5919 }
5920
5921 sub git_tags_body {
5922         # uses global variable $project
5923         my ($taglist, $from, $to, $extra) = @_;
5924         $from = 0 unless defined $from;
5925         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5926
5927         print "<table class=\"tags\">\n";
5928         my $alternate = 1;
5929         for (my $i = $from; $i <= $to; $i++) {
5930                 my $entry = $taglist->[$i];
5931                 my %tag = %$entry;
5932                 my $comment = $tag{'subject'};
5933                 my $comment_short;
5934                 if (defined $comment) {
5935                         $comment_short = chop_str($comment, 30, 5);
5936                 }
5937                 if ($alternate) {
5938                         print "<tr class=\"dark\">\n";
5939                 } else {
5940                         print "<tr class=\"light\">\n";
5941                 }
5942                 $alternate ^= 1;
5943                 if (defined $tag{'age'}) {
5944                         print "<td><i>$tag{'age'}</i></td>\n";
5945                 } else {
5946                         print "<td></td>\n";
5947                 }
5948                 print "<td>" .
5949                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5950                                -class => "list name"}, esc_html($tag{'name'})) .
5951                       "</td>\n" .
5952                       "<td>";
5953                 if (defined $comment) {
5954                         print format_subject_html($comment, $comment_short,
5955                                                   href(action=>"tag", hash=>$tag{'id'}));
5956                 }
5957                 print "</td>\n" .
5958                       "<td class=\"selflink\">";
5959                 if ($tag{'type'} eq "tag") {
5960                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5961                 } else {
5962                         print "&nbsp;";
5963                 }
5964                 print "</td>\n" .
5965                       "<td class=\"link\">" . " | " .
5966                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5967                 if ($tag{'reftype'} eq "commit") {
5968                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5969                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5970                 } elsif ($tag{'reftype'} eq "blob") {
5971                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5972                 }
5973                 print "</td>\n" .
5974                       "</tr>";
5975         }
5976         if (defined $extra) {
5977                 print "<tr>\n" .
5978                       "<td colspan=\"5\">$extra</td>\n" .
5979                       "</tr>\n";
5980         }
5981         print "</table>\n";
5982 }
5983
5984 sub git_heads_body {
5985         # uses global variable $project
5986         my ($headlist, $head_at, $from, $to, $extra) = @_;
5987         $from = 0 unless defined $from;
5988         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5989
5990         print "<table class=\"heads\">\n";
5991         my $alternate = 1;
5992         for (my $i = $from; $i <= $to; $i++) {
5993                 my $entry = $headlist->[$i];
5994                 my %ref = %$entry;
5995                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5996                 if ($alternate) {
5997                         print "<tr class=\"dark\">\n";
5998                 } else {
5999                         print "<tr class=\"light\">\n";
6000                 }
6001                 $alternate ^= 1;
6002                 print "<td><i>$ref{'age'}</i></td>\n" .
6003                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6004                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6005                                -class => "list name"},esc_html($ref{'name'})) .
6006                       "</td>\n" .
6007                       "<td class=\"link\">" .
6008                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6009                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6010                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6011                       "</td>\n" .
6012                       "</tr>";
6013         }
6014         if (defined $extra) {
6015                 print "<tr>\n" .
6016                       "<td colspan=\"3\">$extra</td>\n" .
6017                       "</tr>\n";
6018         }
6019         print "</table>\n";
6020 }
6021
6022 # Display a single remote block
6023 sub git_remote_block {
6024         my ($remote, $rdata, $limit, $head) = @_;
6025
6026         my $heads = $rdata->{'heads'};
6027         my $fetch = $rdata->{'fetch'};
6028         my $push = $rdata->{'push'};
6029
6030         my $urls_table = "<table class=\"projects_list\">\n" ;
6031
6032         if (defined $fetch) {
6033                 if ($fetch eq $push) {
6034                         $urls_table .= format_repo_url("URL", $fetch);
6035                 } else {
6036                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6037                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6038                 }
6039         } elsif (defined $push) {
6040                 $urls_table .= format_repo_url("Push URL", $push);
6041         } else {
6042                 $urls_table .= format_repo_url("", "No remote URL");
6043         }
6044
6045         $urls_table .= "</table>\n";
6046
6047         my $dots;
6048         if (defined $limit && $limit < @$heads) {
6049                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6050         }
6051
6052         print $urls_table;
6053         git_heads_body($heads, $head, 0, $limit, $dots);
6054 }
6055
6056 # Display a list of remote names with the respective fetch and push URLs
6057 sub git_remotes_list {
6058         my ($remotedata, $limit) = @_;
6059         print "<table class=\"heads\">\n";
6060         my $alternate = 1;
6061         my @remotes = sort keys %$remotedata;
6062
6063         my $limited = $limit && $limit < @remotes;
6064
6065         $#remotes = $limit - 1 if $limited;
6066
6067         while (my $remote = shift @remotes) {
6068                 my $rdata = $remotedata->{$remote};
6069                 my $fetch = $rdata->{'fetch'};
6070                 my $push = $rdata->{'push'};
6071                 if ($alternate) {
6072                         print "<tr class=\"dark\">\n";
6073                 } else {
6074                         print "<tr class=\"light\">\n";
6075                 }
6076                 $alternate ^= 1;
6077                 print "<td>" .
6078                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6079                                -class=> "list name"},esc_html($remote)) .
6080                       "</td>";
6081                 print "<td class=\"link\">" .
6082                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6083                       " | " .
6084                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6085                       "</td>";
6086
6087                 print "</tr>\n";
6088         }
6089
6090         if ($limited) {
6091                 print "<tr>\n" .
6092                       "<td colspan=\"3\">" .
6093                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6094                       "</td>\n" . "</tr>\n";
6095         }
6096
6097         print "</table>";
6098 }
6099
6100 # Display remote heads grouped by remote, unless there are too many
6101 # remotes, in which case we only display the remote names
6102 sub git_remotes_body {
6103         my ($remotedata, $limit, $head) = @_;
6104         if ($limit and $limit < keys %$remotedata) {
6105                 git_remotes_list($remotedata, $limit);
6106         } else {
6107                 fill_remote_heads($remotedata);
6108                 while (my ($remote, $rdata) = each %$remotedata) {
6109                         git_print_section({-class=>"remote", -id=>$remote},
6110                                 ["remotes", $remote, $remote], sub {
6111                                         git_remote_block($remote, $rdata, $limit, $head);
6112                                 });
6113                 }
6114         }
6115 }
6116
6117 sub git_search_message {
6118         my %co = @_;
6119
6120         my $greptype;
6121         if ($searchtype eq 'commit') {
6122                 $greptype = "--grep=";
6123         } elsif ($searchtype eq 'author') {
6124                 $greptype = "--author=";
6125         } elsif ($searchtype eq 'committer') {
6126                 $greptype = "--committer=";
6127         }
6128         $greptype .= $searchtext;
6129         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6130                                        $greptype, '--regexp-ignore-case',
6131                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6132
6133         my $paging_nav = '';
6134         if ($page > 0) {
6135                 $paging_nav .=
6136                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6137                                 "first") .
6138                         " &sdot; " .
6139                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6140                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6141         } else {
6142                 $paging_nav .= "first &sdot; prev";
6143         }
6144         my $next_link = '';
6145         if ($#commitlist >= 100) {
6146                 $next_link =
6147                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6148                                  -accesskey => "n", -title => "Alt-n"}, "next");
6149                 $paging_nav .= " &sdot; $next_link";
6150         } else {
6151                 $paging_nav .= " &sdot; next";
6152         }
6153
6154         git_header_html();
6155
6156         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6157         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6158         if ($page == 0 && !@commitlist) {
6159                 print "<p>No match.</p>\n";
6160         } else {
6161                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6162         }
6163
6164         git_footer_html();
6165 }
6166
6167 sub git_search_changes {
6168         my %co = @_;
6169
6170         local $/ = "\n";
6171         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6172                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6173                 ($search_use_regexp ? '--pickaxe-regex' : ())
6174                         or die_error(500, "Open git-log failed");
6175
6176         git_header_html();
6177
6178         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6179         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6180
6181         print "<table class=\"pickaxe search\">\n";
6182         my $alternate = 1;
6183         undef %co;
6184         my @files;
6185         while (my $line = <$fd>) {
6186                 chomp $line;
6187                 next unless $line;
6188
6189                 my %set = parse_difftree_raw_line($line);
6190                 if (defined $set{'commit'}) {
6191                         # finish previous commit
6192                         if (%co) {
6193                                 print "</td>\n" .
6194                                       "<td class=\"link\">" .
6195                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6196                                               "commit") .
6197                                       " | " .
6198                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6199                                                              hash_base=>$co{'id'})},
6200                                               "tree") .
6201                                       "</td>\n" .
6202                                       "</tr>\n";
6203                         }
6204
6205                         if ($alternate) {
6206                                 print "<tr class=\"dark\">\n";
6207                         } else {
6208                                 print "<tr class=\"light\">\n";
6209                         }
6210                         $alternate ^= 1;
6211                         %co = parse_commit($set{'commit'});
6212                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6213                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6214                               "<td><i>$author</i></td>\n" .
6215                               "<td>" .
6216                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6217                                       -class => "list subject"},
6218                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6219                 } elsif (defined $set{'to_id'}) {
6220                         next if ($set{'to_id'} =~ m/^0{40}$/);
6221
6222                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6223                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6224                                       -class => "list"},
6225                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6226                               "<br/>\n";
6227                 }
6228         }
6229         close $fd;
6230
6231         # finish last commit (warning: repetition!)
6232         if (%co) {
6233                 print "</td>\n" .
6234                       "<td class=\"link\">" .
6235                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6236                               "commit") .
6237                       " | " .
6238                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6239                                              hash_base=>$co{'id'})},
6240                               "tree") .
6241                       "</td>\n" .
6242                       "</tr>\n";
6243         }
6244
6245         print "</table>\n";
6246
6247         git_footer_html();
6248 }
6249
6250 sub git_search_files {
6251         my %co = @_;
6252
6253         local $/ = "\n";
6254         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6255                 $search_use_regexp ? ('-E', '-i') : '-F',
6256                 $searchtext, $co{'tree'}
6257                         or die_error(500, "Open git-grep failed");
6258
6259         git_header_html();
6260
6261         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6262         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6263
6264         print "<table class=\"grep_search\">\n";
6265         my $alternate = 1;
6266         my $matches = 0;
6267         my $lastfile = '';
6268         my $file_href;
6269         while (my $line = <$fd>) {
6270                 chomp $line;
6271                 my ($file, $lno, $ltext, $binary);
6272                 last if ($matches++ > 1000);
6273                 if ($line =~ /^Binary file (.+) matches$/) {
6274                         $file = $1;
6275                         $binary = 1;
6276                 } else {
6277                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6278                         $file =~ s/^$co{'tree'}://;
6279                 }
6280                 if ($file ne $lastfile) {
6281                         $lastfile and print "</td></tr>\n";
6282                         if ($alternate++) {
6283                                 print "<tr class=\"dark\">\n";
6284                         } else {
6285                                 print "<tr class=\"light\">\n";
6286                         }
6287                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6288                                           file_name=>$file);
6289                         print "<td class=\"list\">".
6290                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6291                         print "</td><td>\n";
6292                         $lastfile = $file;
6293                 }
6294                 if ($binary) {
6295                         print "<div class=\"binary\">Binary file</div>\n";
6296                 } else {
6297                         $ltext = untabify($ltext);
6298                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6299                                 $ltext = esc_html($1, -nbsp=>1);
6300                                 $ltext .= '<span class="match">';
6301                                 $ltext .= esc_html($2, -nbsp=>1);
6302                                 $ltext .= '</span>';
6303                                 $ltext .= esc_html($3, -nbsp=>1);
6304                         } else {
6305                                 $ltext = esc_html($ltext, -nbsp=>1);
6306                         }
6307                         print "<div class=\"pre\">" .
6308                                 $cgi->a({-href => $file_href.'#l'.$lno,
6309                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6310                                 ' ' .  $ltext . "</div>\n";
6311                 }
6312         }
6313         if ($lastfile) {
6314                 print "</td></tr>\n";
6315                 if ($matches > 1000) {
6316                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6317                 }
6318         } else {
6319                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6320         }
6321         close $fd;
6322
6323         print "</table>\n";
6324
6325         git_footer_html();
6326 }
6327
6328 sub git_search_grep_body {
6329         my ($commitlist, $from, $to, $extra) = @_;
6330         $from = 0 unless defined $from;
6331         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6332
6333         print "<table class=\"commit_search\">\n";
6334         my $alternate = 1;
6335         for (my $i = $from; $i <= $to; $i++) {
6336                 my %co = %{$commitlist->[$i]};
6337                 if (!%co) {
6338                         next;
6339                 }
6340                 my $commit = $co{'id'};
6341                 if ($alternate) {
6342                         print "<tr class=\"dark\">\n";
6343                 } else {
6344                         print "<tr class=\"light\">\n";
6345                 }
6346                 $alternate ^= 1;
6347                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6348                       format_author_html('td', \%co, 15, 5) .
6349                       "<td>" .
6350                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6351                                -class => "list subject"},
6352                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6353                 my $comment = $co{'comment'};
6354                 foreach my $line (@$comment) {
6355                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6356                                 my ($lead, $match, $trail) = ($1, $2, $3);
6357                                 $match = chop_str($match, 70, 5, 'center');
6358                                 my $contextlen = int((80 - length($match))/2);
6359                                 $contextlen = 30 if ($contextlen > 30);
6360                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6361                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6362
6363                                 $lead  = esc_html($lead);
6364                                 $match = esc_html($match);
6365                                 $trail = esc_html($trail);
6366
6367                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6368                         }
6369                 }
6370                 print "</td>\n" .
6371                       "<td class=\"link\">" .
6372                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6373                       " | " .
6374                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6375                       " | " .
6376                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6377                 print "</td>\n" .
6378                       "</tr>\n";
6379         }
6380         if (defined $extra) {
6381                 print "<tr>\n" .
6382                       "<td colspan=\"3\">$extra</td>\n" .
6383                       "</tr>\n";
6384         }
6385         print "</table>\n";
6386 }
6387
6388 ## ======================================================================
6389 ## ======================================================================
6390 ## actions
6391
6392 sub git_project_list {
6393         my $order = $input_params{'order'};
6394         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6395                 die_error(400, "Unknown order parameter");
6396         }
6397
6398         my @list = git_get_projects_list($project_filter, $strict_export);
6399         if (!@list) {
6400                 die_error(404, "No projects found");
6401         }
6402
6403         git_header_html();
6404         if (defined $home_text && -f $home_text) {
6405                 print "<div class=\"index_include\">\n";
6406                 insert_file($home_text);
6407                 print "</div>\n";
6408         }
6409
6410         git_project_search_form($searchtext, $search_use_regexp);
6411         git_project_list_body(\@list, $order);
6412         git_footer_html();
6413 }
6414
6415 sub git_forks {
6416         my $order = $input_params{'order'};
6417         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6418                 die_error(400, "Unknown order parameter");
6419         }
6420
6421         my $filter = $project;
6422         $filter =~ s/\.git$//;
6423         my @list = git_get_projects_list($filter);
6424         if (!@list) {
6425                 die_error(404, "No forks found");
6426         }
6427
6428         git_header_html();
6429         git_print_page_nav('','');
6430         git_print_header_div('summary', "$project forks");
6431         git_project_list_body(\@list, $order);
6432         git_footer_html();
6433 }
6434
6435 sub git_project_index {
6436         my @projects = git_get_projects_list($project_filter, $strict_export);
6437         if (!@projects) {
6438                 die_error(404, "No projects found");
6439         }
6440
6441         print $cgi->header(
6442                 -type => 'text/plain',
6443                 -charset => 'utf-8',
6444                 -content_disposition => 'inline; filename="index.aux"');
6445
6446         foreach my $pr (@projects) {
6447                 if (!exists $pr->{'owner'}) {
6448                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6449                 }
6450
6451                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6452                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6453                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6454                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6455                 $path  =~ s/ /\+/g;
6456                 $owner =~ s/ /\+/g;
6457
6458                 print "$path $owner\n";
6459         }
6460 }
6461
6462 sub git_summary {
6463         my $descr = git_get_project_description($project) || "none";
6464         my %co = parse_commit("HEAD");
6465         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6466         my $head = $co{'id'};
6467         my $remote_heads = gitweb_check_feature('remote_heads');
6468
6469         my $owner = git_get_project_owner($project);
6470
6471         my $refs = git_get_references();
6472         # These get_*_list functions return one more to allow us to see if
6473         # there are more ...
6474         my @taglist  = git_get_tags_list(16);
6475         my @headlist = git_get_heads_list(16);
6476         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6477         my @forklist;
6478         my $check_forks = gitweb_check_feature('forks');
6479
6480         if ($check_forks) {
6481                 # find forks of a project
6482                 my $filter = $project;
6483                 $filter =~ s/\.git$//;
6484                 @forklist = git_get_projects_list($filter);
6485                 # filter out forks of forks
6486                 @forklist = filter_forks_from_projects_list(\@forklist)
6487                         if (@forklist);
6488         }
6489
6490         git_header_html();
6491         git_print_page_nav('summary','', $head);
6492
6493         print "<div class=\"title\">&nbsp;</div>\n";
6494         print "<table class=\"projects_list\">\n" .
6495               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6496         unless ($omit_owner) {
6497                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6498         }
6499         if (defined $cd{'rfc2822'}) {
6500                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6501                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6502         }
6503
6504         # use per project git URL list in $projectroot/$project/cloneurl
6505         # or make project git URL from git base URL and project name
6506         my $url_tag = "URL";
6507         my @url_list = git_get_project_url_list($project);
6508         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6509         foreach my $git_url (@url_list) {
6510                 next unless $git_url;
6511                 print format_repo_url($url_tag, $git_url);
6512                 $url_tag = "";
6513         }
6514
6515         # Tag cloud
6516         my $show_ctags = gitweb_check_feature('ctags');
6517         if ($show_ctags) {
6518                 my $ctags = git_get_project_ctags($project);
6519                 if (%$ctags) {
6520                         # without ability to add tags, don't show if there are none
6521                         my $cloud = git_populate_project_tagcloud($ctags);
6522                         print "<tr id=\"metadata_ctags\">" .
6523                               "<td>content tags</td>" .
6524                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6525                               "</tr>\n";
6526                 }
6527         }
6528
6529         print "</table>\n";
6530
6531         # If XSS prevention is on, we don't include README.html.
6532         # TODO: Allow a readme in some safe format.
6533         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6534                 print "<div class=\"title\">readme</div>\n" .
6535                       "<div class=\"readme\">\n";
6536                 insert_file("$projectroot/$project/README.html");
6537                 print "\n</div>\n"; # class="readme"
6538         }
6539
6540         # we need to request one more than 16 (0..15) to check if
6541         # those 16 are all
6542         my @commitlist = $head ? parse_commits("--all", 17) : ();
6543         if (@commitlist) {
6544                 git_print_header_div('shortlog');
6545                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6546                                   $#commitlist <=  15 ? undef :
6547                                   $cgi->a({-href => href(action=>"shortlog")}, "..."), 0, 0, 0, 1);;
6548         }
6549
6550         if (@taglist) {
6551                 git_print_header_div('tags');
6552                 git_tags_body(\@taglist, 0, 15,
6553                               $#taglist <=  15 ? undef :
6554                               $cgi->a({-href => href(action=>"tags")}, "..."));
6555         }
6556
6557         if (@headlist) {
6558                 git_print_header_div('heads');
6559                 git_heads_body(\@headlist, $head, 0, 15,
6560                                $#headlist <= 15 ? undef :
6561                                $cgi->a({-href => href(action=>"heads")}, "..."));
6562         }
6563
6564         if (%remotedata) {
6565                 git_print_header_div('remotes');
6566                 git_remotes_body(\%remotedata, 15, $head);
6567         }
6568
6569         if (@forklist) {
6570                 git_print_header_div('forks');
6571                 git_project_list_body(\@forklist, 'age', 0, 15,
6572                                       $#forklist <= 15 ? undef :
6573                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6574                                       'no_header');
6575         }
6576
6577         git_footer_html();
6578 }
6579
6580 sub git_tag {
6581         my %tag = parse_tag($hash);
6582
6583         if (! %tag) {
6584                 die_error(404, "Unknown tag object");
6585         }
6586
6587         my $head = git_get_head_hash($project);
6588         git_header_html();
6589         git_print_page_nav('','', $head,undef,$head);
6590         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6591         print "<div class=\"title_text\">\n" .
6592               "<table class=\"object_header\">\n" .
6593               "<tr>\n" .
6594               "<td>object</td>\n" .
6595               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6596                                $tag{'object'}) . "</td>\n" .
6597               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6598                                               $tag{'type'}) . "</td>\n" .
6599               "</tr>\n";
6600         if (defined($tag{'author'})) {
6601                 git_print_authorship_rows(\%tag, 'author');
6602         }
6603         print "</table>\n\n" .
6604               "</div>\n";
6605         print "<div class=\"page_body\">";
6606         my $comment = $tag{'comment'};
6607         foreach my $line (@$comment) {
6608                 chomp $line;
6609                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6610         }
6611         print "</div>\n";
6612         git_footer_html();
6613 }
6614
6615 sub git_blame_common {
6616         my $format = shift || 'porcelain';
6617         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6618                 $format = 'incremental';
6619                 $action = 'blame_incremental'; # for page title etc
6620         }
6621
6622         # permissions
6623         gitweb_check_feature('blame')
6624                 or die_error(403, "Blame view not allowed");
6625
6626         # error checking
6627         die_error(400, "No file name given") unless $file_name;
6628         $hash_base ||= git_get_head_hash($project);
6629         die_error(404, "Couldn't find base commit") unless $hash_base;
6630         my %co = parse_commit($hash_base)
6631                 or die_error(404, "Commit not found");
6632         my $ftype = "blob";
6633         if (!defined $hash) {
6634                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6635                         or die_error(404, "Error looking up file");
6636         } else {
6637                 $ftype = git_get_type($hash);
6638                 if ($ftype !~ "blob") {
6639                         die_error(400, "Object is not a blob");
6640                 }
6641         }
6642
6643         my $fd;
6644         if ($format eq 'incremental') {
6645                 # get file contents (as base)
6646                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6647                         or die_error(500, "Open git-cat-file failed");
6648         } elsif ($format eq 'data') {
6649                 # run git-blame --incremental
6650                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6651                         $hash_base, "--", $file_name
6652                         or die_error(500, "Open git-blame --incremental failed");
6653         } else {
6654                 # run git-blame --porcelain
6655                 open $fd, "-|", git_cmd(), "blame", '-p',
6656                         $hash_base, '--', $file_name
6657                         or die_error(500, "Open git-blame --porcelain failed");
6658         }
6659
6660         # incremental blame data returns early
6661         if ($format eq 'data') {
6662                 print $cgi->header(
6663                         -type=>"text/plain", -charset => "utf-8",
6664                         -status=> "200 OK");
6665                 local $| = 1; # output autoflush
6666                 while (my $line = <$fd>) {
6667                         print to_utf8($line);
6668                 }
6669                 close $fd
6670                         or print "ERROR $!\n";
6671
6672                 print 'END';
6673                 if (defined $t0 && gitweb_check_feature('timed')) {
6674                         print ' '.
6675                               tv_interval($t0, [ gettimeofday() ]).
6676                               ' '.$number_of_git_cmds;
6677                 }
6678                 print "\n";
6679
6680                 return;
6681         }
6682
6683         # page header
6684         git_header_html();
6685         my $formats_nav =
6686                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6687                         "blob") .
6688                 " | ";
6689         if ($format eq 'incremental') {
6690                 $formats_nav .=
6691                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6692                                 "blame") . " (non-incremental)";
6693         } else {
6694                 $formats_nav .=
6695                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6696                                 "blame") . " (incremental)";
6697         }
6698         $formats_nav .=
6699                 " | " .
6700                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6701                         "history") .
6702                 " | " .
6703                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6704                         "HEAD");
6705         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6706         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6707         git_print_page_path($file_name, $ftype, $hash_base);
6708
6709         # page body
6710         if ($format eq 'incremental') {
6711                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6712                       "This page requires JavaScript to run.\n Use ".
6713                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6714                               'this page').
6715                       " instead.\n".
6716                       "</b></center></div>\n</noscript>\n";
6717
6718                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6719         }
6720
6721         print qq!<div class="page_body">\n!;
6722         print qq!<div id="progress_info">... / ...</div>\n!
6723                 if ($format eq 'incremental');
6724         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6725               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6726               qq!<thead>\n!.
6727               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6728               qq!</thead>\n!.
6729               qq!<tbody>\n!;
6730
6731         my @rev_color = qw(light dark);
6732         my $num_colors = scalar(@rev_color);
6733         my $current_color = 0;
6734
6735         if ($format eq 'incremental') {
6736                 my $color_class = $rev_color[$current_color];
6737
6738                 #contents of a file
6739                 my $linenr = 0;
6740         LINE:
6741                 while (my $line = <$fd>) {
6742                         chomp $line;
6743                         $linenr++;
6744
6745                         print qq!<tr id="l$linenr" class="$color_class">!.
6746                               qq!<td class="sha1"><a href=""> </a></td>!.
6747                               qq!<td class="linenr">!.
6748                               qq!<a class="linenr" href="">$linenr</a></td>!;
6749                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6750                         print qq!</tr>\n!;
6751                 }
6752
6753         } else { # porcelain, i.e. ordinary blame
6754                 my %metainfo = (); # saves information about commits
6755
6756                 # blame data
6757         LINE:
6758                 while (my $line = <$fd>) {
6759                         chomp $line;
6760                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6761                         # no <lines in group> for subsequent lines in group of lines
6762                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6763                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6764                         if (!exists $metainfo{$full_rev}) {
6765                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6766                         }
6767                         my $meta = $metainfo{$full_rev};
6768                         my $data;
6769                         while ($data = <$fd>) {
6770                                 chomp $data;
6771                                 last if ($data =~ s/^\t//); # contents of line
6772                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6773                                         $meta->{$1} = $2 unless exists $meta->{$1};
6774                                 }
6775                                 if ($data =~ /^previous /) {
6776                                         $meta->{'nprevious'}++;
6777                                 }
6778                         }
6779                         my $short_rev = substr($full_rev, 0, 8);
6780                         my $author = $meta->{'author'};
6781                         my %date =
6782                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6783                         my $date = $date{'iso-tz'};
6784                         if ($group_size) {
6785                                 $current_color = ($current_color + 1) % $num_colors;
6786                         }
6787                         my $tr_class = $rev_color[$current_color];
6788                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6789                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6790                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6791                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6792                         if ($group_size) {
6793                                 print "<td class=\"sha1\"";
6794                                 print " title=\"". esc_html($author) . ", $date\"";
6795                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6796                                 print ">";
6797                                 print $cgi->a({-href => href(action=>"commit",
6798                                                              hash=>$full_rev,
6799                                                              file_name=>$file_name)},
6800                                               esc_html($short_rev));
6801                                 if ($group_size >= 2) {
6802                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6803                                         if (@author_initials) {
6804                                                 print "<br />" .
6805                                                       esc_html(join('', @author_initials));
6806                                                 #           or join('.', ...)
6807                                         }
6808                                 }
6809                                 print "</td>\n";
6810                         }
6811                         # 'previous' <sha1 of parent commit> <filename at commit>
6812                         if (exists $meta->{'previous'} &&
6813                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6814                                 $meta->{'parent'} = $1;
6815                                 $meta->{'file_parent'} = unquote($2);
6816                         }
6817                         my $linenr_commit =
6818                                 exists($meta->{'parent'}) ?
6819                                 $meta->{'parent'} : $full_rev;
6820                         my $linenr_filename =
6821                                 exists($meta->{'file_parent'}) ?
6822                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6823                         my $blamed = href(action => 'blame',
6824                                           file_name => $linenr_filename,
6825                                           hash_base => $linenr_commit);
6826                         print "<td class=\"linenr\">";
6827                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6828                                         -class => "linenr" },
6829                                       esc_html($lineno));
6830                         print "</td>";
6831                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6832                         print "</tr>\n";
6833                 } # end while
6834
6835         }
6836
6837         # footer
6838         print "</tbody>\n".
6839               "</table>\n"; # class="blame"
6840         print "</div>\n";   # class="blame_body"
6841         close $fd
6842                 or print "Reading blob failed\n";
6843
6844         git_footer_html();
6845 }
6846
6847 sub git_blame {
6848         git_blame_common();
6849 }
6850
6851 sub git_blame_incremental {
6852         git_blame_common('incremental');
6853 }
6854
6855 sub git_blame_data {
6856         git_blame_common('data');
6857 }
6858
6859 sub git_tags {
6860         my $head = git_get_head_hash($project);
6861         git_header_html();
6862         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6863         git_print_header_div('summary', $project);
6864
6865         my @tagslist = git_get_tags_list();
6866         if (@tagslist) {
6867                 git_tags_body(\@tagslist);
6868         }
6869         git_footer_html();
6870 }
6871
6872 sub git_heads {
6873         my $head = git_get_head_hash($project);
6874         git_header_html();
6875         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6876         git_print_header_div('summary', $project);
6877
6878         my @headslist = git_get_heads_list();
6879         if (@headslist) {
6880                 git_heads_body(\@headslist, $head);
6881         }
6882         git_footer_html();
6883 }
6884
6885 # used both for single remote view and for list of all the remotes
6886 sub git_remotes {
6887         gitweb_check_feature('remote_heads')
6888                 or die_error(403, "Remote heads view is disabled");
6889
6890         my $head = git_get_head_hash($project);
6891         my $remote = $input_params{'hash'};
6892
6893         my $remotedata = git_get_remotes_list($remote);
6894         die_error(500, "Unable to get remote information") unless defined $remotedata;
6895
6896         unless (%$remotedata) {
6897                 die_error(404, defined $remote ?
6898                         "Remote $remote not found" :
6899                         "No remotes found");
6900         }
6901
6902         git_header_html(undef, undef, -action_extra => $remote);
6903         git_print_page_nav('', '',  $head, undef, $head,
6904                 format_ref_views($remote ? '' : 'remotes'));
6905
6906         fill_remote_heads($remotedata);
6907         if (defined $remote) {
6908                 git_print_header_div('remotes', "$remote remote for $project");
6909                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6910         } else {
6911                 git_print_header_div('summary', "$project remotes");
6912                 git_remotes_body($remotedata, undef, $head);
6913         }
6914
6915         git_footer_html();
6916 }
6917
6918 sub git_blob_plain {
6919         my $type = shift;
6920         my $expires;
6921
6922         if (!defined $hash) {
6923                 if (defined $file_name) {
6924                         my $base = $hash_base || git_get_head_hash($project);
6925                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6926                                 or die_error(404, "Cannot find file");
6927                 } else {
6928                         die_error(400, "No file name defined");
6929                 }
6930         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6931                 # blobs defined by non-textual hash id's can be cached
6932                 $expires = "+1d";
6933         }
6934
6935         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6936                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6937
6938         # content-type (can include charset)
6939         $type = blob_contenttype($fd, $file_name, $type);
6940
6941         # "save as" filename, even when no $file_name is given
6942         my $save_as = "$hash";
6943         if (defined $file_name) {
6944                 $save_as = $file_name;
6945         } elsif ($type =~ m/^text\//) {
6946                 $save_as .= '.txt';
6947         }
6948
6949         # With XSS prevention on, blobs of all types except a few known safe
6950         # ones are served with "Content-Disposition: attachment" to make sure
6951         # they don't run in our security domain.  For certain image types,
6952         # blob view writes an <img> tag referring to blob_plain view, and we
6953         # want to be sure not to break that by serving the image as an
6954         # attachment (though Firefox 3 doesn't seem to care).
6955         my $sandbox = $prevent_xss &&
6956                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6957
6958         # serve text/* as text/plain
6959         if ($prevent_xss &&
6960             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6961              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6962                 my $rest = $1;
6963                 $rest = defined $rest ? $rest : '';
6964                 $type = "text/plain$rest";
6965         }
6966
6967         print $cgi->header(
6968                 -type => $type,
6969                 -expires => $expires,
6970                 -content_disposition =>
6971                         ($sandbox ? 'attachment' : 'inline')
6972                         . '; filename="' . $save_as . '"');
6973         local $/ = undef;
6974         binmode STDOUT, ':raw';
6975         print <$fd>;
6976         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6977         close $fd;
6978 }
6979
6980 sub git_blob {
6981         my $expires;
6982
6983         if (!defined $hash) {
6984                 if (defined $file_name) {
6985                         my $base = $hash_base || git_get_head_hash($project);
6986                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6987                                 or die_error(404, "Cannot find file");
6988                 } else {
6989                         die_error(400, "No file name defined");
6990                 }
6991         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6992                 # blobs defined by non-textual hash id's can be cached
6993                 $expires = "+1d";
6994         }
6995
6996         my $have_blame = gitweb_check_feature('blame');
6997         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6998                 or die_error(500, "Couldn't cat $file_name, $hash");
6999         my $mimetype = blob_mimetype($fd, $file_name);
7000         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7001         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7002                 close $fd;
7003                 return git_blob_plain($mimetype);
7004         }
7005         # we can have blame only for text/* mimetype
7006         $have_blame &&= ($mimetype =~ m!^text/!);
7007
7008         my $highlight = gitweb_check_feature('highlight');
7009         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7010         $fd = run_highlighter($fd, $highlight, $syntax)
7011                 if $syntax;
7012
7013         git_header_html(undef, $expires);
7014         my $formats_nav = '';
7015         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7016                 if (defined $file_name) {
7017                         if ($have_blame) {
7018                                 $formats_nav .=
7019                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7020                                                 "blame") .
7021                                         " | ";
7022                         }
7023                         $formats_nav .=
7024                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7025                                         "history") .
7026                                 " | " .
7027                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7028                                         "raw") .
7029                                 " | " .
7030                                 $cgi->a({-href => href(action=>"blob",
7031                                                        hash_base=>"HEAD", file_name=>$file_name)},
7032                                         "HEAD");
7033                 } else {
7034                         $formats_nav .=
7035                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7036                                         "raw");
7037                 }
7038                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7039                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7040         } else {
7041                 print "<div class=\"page_nav\">\n" .
7042                       "<br/><br/></div>\n" .
7043                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7044         }
7045         git_print_page_path($file_name, "blob", $hash_base);
7046         print "<div class=\"page_body\">\n";
7047         if ($mimetype =~ m!^image/!) {
7048                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7049                 if ($file_name) {
7050                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7051                 }
7052                 print qq! src="! .
7053                       href(action=>"blob_plain", hash=>$hash,
7054                            hash_base=>$hash_base, file_name=>$file_name) .
7055                       qq!" />\n!;
7056         } else {
7057                 my $nr;
7058                 while (my $line = <$fd>) {
7059                         chomp $line;
7060                         $nr++;
7061                         $line = untabify($line);
7062                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7063                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7064                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7065                 }
7066         }
7067         close $fd
7068                 or print "Reading blob failed.\n";
7069         print "</div>";
7070         git_footer_html();
7071 }
7072
7073 sub git_tree {
7074         if (!defined $hash_base) {
7075                 $hash_base = "HEAD";
7076         }
7077         if (!defined $hash) {
7078                 if (defined $file_name) {
7079                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7080                 } else {
7081                         $hash = $hash_base;
7082                 }
7083         }
7084         die_error(404, "No such tree") unless defined($hash);
7085
7086         my $show_sizes = gitweb_check_feature('show-sizes');
7087         my $have_blame = gitweb_check_feature('blame');
7088
7089         my @entries = ();
7090         {
7091                 local $/ = "\0";
7092                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7093                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7094                         or die_error(500, "Open git-ls-tree failed");
7095                 @entries = map { chomp; $_ } <$fd>;
7096                 close $fd
7097                         or die_error(404, "Reading tree failed");
7098         }
7099
7100         my $refs = git_get_references();
7101         my $ref = format_ref_marker($refs, $hash_base);
7102         git_header_html();
7103         my $basedir = '';
7104         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7105                 my @views_nav = ();
7106                 if (defined $file_name) {
7107                         push @views_nav,
7108                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7109                                         "history"),
7110                                 $cgi->a({-href => href(action=>"tree",
7111                                                        hash_base=>"HEAD", file_name=>$file_name)},
7112                                         "HEAD"),
7113                 }
7114                 my $snapshot_links = format_snapshot_links($hash);
7115                 if (defined $snapshot_links) {
7116                         # FIXME: Should be available when we have no hash base as well.
7117                         push @views_nav, $snapshot_links;
7118                 }
7119                 git_print_page_nav('tree','', $hash_base, undef, undef,
7120                                    join(' | ', @views_nav));
7121                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7122         } else {
7123                 undef $hash_base;
7124                 print "<div class=\"page_nav\">\n";
7125                 print "<br/><br/></div>\n";
7126                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7127         }
7128         if (defined $file_name) {
7129                 $basedir = $file_name;
7130                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7131                         $basedir .= '/';
7132                 }
7133                 git_print_page_path($file_name, 'tree', $hash_base);
7134         }
7135         print "<div class=\"page_body\">\n";
7136         print "<table class=\"tree\">\n";
7137         my $alternate = 1;
7138         # '..' (top directory) link if possible
7139         if (defined $hash_base &&
7140             defined $file_name && $file_name =~ m![^/]+$!) {
7141                 if ($alternate) {
7142                         print "<tr class=\"dark\">\n";
7143                 } else {
7144                         print "<tr class=\"light\">\n";
7145                 }
7146                 $alternate ^= 1;
7147
7148                 my $up = $file_name;
7149                 $up =~ s!/?[^/]+$!!;
7150                 undef $up unless $up;
7151                 # based on git_print_tree_entry
7152                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7153                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7154                 print '<td class="list">';
7155                 print $cgi->a({-href => href(action=>"tree",
7156                                              hash_base=>$hash_base,
7157                                              file_name=>$up)},
7158                               "..");
7159                 print "</td>\n";
7160                 print "<td class=\"link\"></td>\n";
7161
7162                 print "</tr>\n";
7163         }
7164         foreach my $line (@entries) {
7165                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7166
7167                 if ($alternate) {
7168                         print "<tr class=\"dark\">\n";
7169                 } else {
7170                         print "<tr class=\"light\">\n";
7171                 }
7172                 $alternate ^= 1;
7173
7174                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7175
7176                 print "</tr>\n";
7177         }
7178         print "</table>\n" .
7179               "</div>";
7180         git_footer_html();
7181 }
7182
7183 sub snapshot_name {
7184         my ($project, $hash) = @_;
7185
7186         # path/to/project.git  -> project
7187         # path/to/project/.git -> project
7188         my $name = to_utf8($project);
7189         $name =~ s,([^/])/*\.git$,$1,;
7190         $name = basename($name);
7191         # sanitize name
7192         $name =~ s/[[:cntrl:]]/?/g;
7193
7194         my $ver = $hash;
7195         if ($hash =~ /^[0-9a-fA-F]+$/) {
7196                 # shorten SHA-1 hash
7197                 my $full_hash = git_get_full_hash($project, $hash);
7198                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7199                         $ver = git_get_short_hash($project, $hash);
7200                 }
7201         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7202                 # tags don't need shortened SHA-1 hash
7203                 $ver = $1;
7204         } else {
7205                 # branches and other need shortened SHA-1 hash
7206                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7207                         $ver = $1;
7208                 }
7209                 $ver .= '-' . git_get_short_hash($project, $hash);
7210         }
7211         # in case of hierarchical branch names
7212         $ver =~ s!/!.!g;
7213
7214         # name = project-version_string
7215         $name = "$name-$ver";
7216
7217         return wantarray ? ($name, $name) : $name;
7218 }
7219
7220 sub exit_if_unmodified_since {
7221         my ($latest_epoch) = @_;
7222         our $cgi;
7223
7224         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7225         if (defined $if_modified) {
7226                 my $since;
7227                 if (eval { require HTTP::Date; 1; }) {
7228                         $since = HTTP::Date::str2time($if_modified);
7229                 } elsif (eval { require Time::ParseDate; 1; }) {
7230                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7231                 }
7232                 if (defined $since && $latest_epoch <= $since) {
7233                         my %latest_date = parse_date($latest_epoch);
7234                         print $cgi->header(
7235                                 -last_modified => $latest_date{'rfc2822'},
7236                                 -status => '304 Not Modified');
7237                         goto DONE_GITWEB;
7238                 }
7239         }
7240 }
7241
7242 sub git_snapshot {
7243         my $format = $input_params{'snapshot_format'};
7244         if (!@snapshot_fmts) {
7245                 die_error(403, "Snapshots not allowed");
7246         }
7247         # default to first supported snapshot format
7248         $format ||= $snapshot_fmts[0];
7249         if ($format !~ m/^[a-z0-9]+$/) {
7250                 die_error(400, "Invalid snapshot format parameter");
7251         } elsif (!exists($known_snapshot_formats{$format})) {
7252                 die_error(400, "Unknown snapshot format");
7253         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7254                 die_error(403, "Snapshot format not allowed");
7255         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7256                 die_error(403, "Unsupported snapshot format");
7257         }
7258
7259         my $type = git_get_type("$hash^{}");
7260         if (!$type) {
7261                 die_error(404, 'Object does not exist');
7262         }  elsif ($type eq 'blob') {
7263                 die_error(400, 'Object is not a tree-ish');
7264         }
7265
7266         my ($name, $prefix) = snapshot_name($project, $hash);
7267         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7268
7269         my %co = parse_commit($hash);
7270         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7271
7272         my $cmd = quote_command(
7273                 git_cmd(), 'archive',
7274                 "--format=$known_snapshot_formats{$format}{'format'}",
7275                 "--prefix=$prefix/", $hash);
7276         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7277                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7278         }
7279
7280         $filename =~ s/(["\\])/\\$1/g;
7281         my %latest_date;
7282         if (%co) {
7283                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7284         }
7285
7286         print $cgi->header(
7287                 -type => $known_snapshot_formats{$format}{'type'},
7288                 -content_disposition => 'inline; filename="' . $filename . '"',
7289                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7290                 -status => '200 OK');
7291
7292         open my $fd, "-|", $cmd
7293                 or die_error(500, "Execute git-archive failed");
7294         binmode STDOUT, ':raw';
7295         print <$fd>;
7296         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7297         close $fd;
7298 }
7299
7300 sub git_log_generic {
7301         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7302
7303         my $head = git_get_head_hash($project);
7304         my $allrefs;
7305         if (!defined $base) {
7306                 $base = $head;
7307                 $allrefs = 1;
7308         }
7309         if (!defined $page) {
7310                 $page = 0;
7311         }
7312         my $refs = git_get_references();
7313
7314         my $commit_hash = $base;
7315         if (defined $allrefs) {
7316                 $commit_hash = "--all";
7317         }
7318         if (defined $parent) {
7319                 $commit_hash = "$parent..$base";
7320         }
7321         my @commitlist =
7322                 parse_commits($commit_hash, 101, (100 * $page),
7323                               defined $file_name ? ($file_name, "--full-history") : ());
7324
7325         my $ftype;
7326         if (!defined $file_hash && defined $file_name) {
7327                 # some commits could have deleted file in question,
7328                 # and not have it in tree, but one of them has to have it
7329                 for (my $i = 0; $i < @commitlist; $i++) {
7330                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7331                         last if defined $file_hash;
7332                 }
7333         }
7334         if (defined $file_hash) {
7335                 $ftype = git_get_type($file_hash);
7336         }
7337         if (defined $file_name && !defined $ftype) {
7338                 die_error(500, "Unknown type of object");
7339         }
7340         my %co;
7341         if (defined $file_name) {
7342                 %co = parse_commit($base)
7343                         or die_error(404, "Unknown commit object");
7344         }
7345
7346
7347         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7348         my $next_link = '';
7349         if ($#commitlist >= 100) {
7350                 $next_link =
7351                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7352                                  -accesskey => "n", -title => "Alt-n"}, "next");
7353         }
7354         my $patch_max = gitweb_get_feature('patches');
7355         if ($patch_max && !defined $file_name) {
7356                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7357                         $paging_nav .= " &sdot; " .
7358                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7359                                         "patches");
7360                 }
7361         }
7362
7363         git_header_html();
7364         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7365         if (defined $file_name) {
7366                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7367         } else {
7368                 git_print_header_div('summary', $project)
7369         }
7370         git_print_page_path($file_name, $ftype, $hash_base)
7371                 if (defined $file_name);
7372
7373         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7374                      $file_name, $file_hash, $ftype, $allrefs);
7375
7376         git_footer_html();
7377 }
7378
7379 sub git_log {
7380         git_log_generic('log', \&git_log_body,
7381                         $hash, $hash_parent);
7382 }
7383
7384 sub git_commit {
7385         $hash ||= $hash_base || "HEAD";
7386         my %co = parse_commit($hash)
7387             or die_error(404, "Unknown commit object");
7388
7389         my $parent  = $co{'parent'};
7390         my $parents = $co{'parents'}; # listref
7391
7392         # we need to prepare $formats_nav before any parameter munging
7393         my $formats_nav;
7394         if (!defined $parent) {
7395                 # --root commitdiff
7396                 $formats_nav .= '(initial)';
7397         } elsif (@$parents == 1) {
7398                 # single parent commit
7399                 $formats_nav .=
7400                         '(parent: ' .
7401                         $cgi->a({-href => href(action=>"commit",
7402                                                hash=>$parent)},
7403                                 esc_html(substr($parent, 0, 7))) .
7404                         ')';
7405         } else {
7406                 # merge commit
7407                 $formats_nav .=
7408                         '(merge: ' .
7409                         join(' ', map {
7410                                 $cgi->a({-href => href(action=>"commit",
7411                                                        hash=>$_)},
7412                                         esc_html(substr($_, 0, 7)));
7413                         } @$parents ) .
7414                         ')';
7415         }
7416         if (gitweb_check_feature('patches') && @$parents <= 1) {
7417                 $formats_nav .= " | " .
7418                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7419                                 "patch");
7420         }
7421
7422         if (!defined $parent) {
7423                 $parent = "--root";
7424         }
7425         my @difftree;
7426         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7427                 @diff_opts,
7428                 (@$parents <= 1 ? $parent : '-c'),
7429                 $hash, "--"
7430                 or die_error(500, "Open git-diff-tree failed");
7431         @difftree = map { chomp; $_ } <$fd>;
7432         close $fd or die_error(404, "Reading git-diff-tree failed");
7433
7434         # non-textual hash id's can be cached
7435         my $expires;
7436         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7437                 $expires = "+1d";
7438         }
7439         my $refs = git_get_references();
7440         my $ref = format_ref_marker($refs, $co{'id'});
7441
7442         git_header_html(undef, $expires);
7443         git_print_page_nav('commit', '',
7444                            $hash, $co{'tree'}, $hash,
7445                            $formats_nav);
7446
7447         if (defined $co{'parent'}) {
7448                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7449         } else {
7450                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7451         }
7452         print "<div class=\"title_text\">\n" .
7453               "<table class=\"object_header\">\n";
7454         git_print_authorship_rows(\%co);
7455         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7456         print "<tr>" .
7457               "<td>tree</td>" .
7458               "<td class=\"sha1\">" .
7459               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7460                        class => "list"}, $co{'tree'}) .
7461               "</td>" .
7462               "<td class=\"link\">" .
7463               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7464                       "tree");
7465         my $snapshot_links = format_snapshot_links($hash);
7466         if (defined $snapshot_links) {
7467                 print " | " . $snapshot_links;
7468         }
7469         print "</td>" .
7470               "</tr>\n";
7471
7472         foreach my $par (@$parents) {
7473                 print "<tr>" .
7474                       "<td>parent</td>" .
7475                       "<td class=\"sha1\">" .
7476                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7477                                class => "list"}, $par) .
7478                       "</td>" .
7479                       "<td class=\"link\">" .
7480                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7481                       " | " .
7482                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7483                       "</td>" .
7484                       "</tr>\n";
7485         }
7486         print "</table>".
7487               "</div>\n";
7488
7489         print "<div class=\"page_body\">\n";
7490         git_print_log($co{'comment'});
7491         print "</div>\n";
7492
7493         git_difftree_body(\@difftree, $hash, @$parents);
7494
7495         git_footer_html();
7496 }
7497
7498 sub git_object {
7499         # object is defined by:
7500         # - hash or hash_base alone
7501         # - hash_base and file_name
7502         my $type;
7503
7504         # - hash or hash_base alone
7505         if ($hash || ($hash_base && !defined $file_name)) {
7506                 my $object_id = $hash || $hash_base;
7507
7508                 open my $fd, "-|", quote_command(
7509                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7510                         or die_error(404, "Object does not exist");
7511                 $type = <$fd>;
7512                 chomp $type;
7513                 close $fd
7514                         or die_error(404, "Object does not exist");
7515
7516         # - hash_base and file_name
7517         } elsif ($hash_base && defined $file_name) {
7518                 $file_name =~ s,/+$,,;
7519
7520                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7521                         or die_error(404, "Base object does not exist");
7522
7523                 # here errors should not hapen
7524                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7525                         or die_error(500, "Open git-ls-tree failed");
7526                 my $line = <$fd>;
7527                 close $fd;
7528
7529                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7530                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7531                         die_error(404, "File or directory for given base does not exist");
7532                 }
7533                 $type = $2;
7534                 $hash = $3;
7535         } else {
7536                 die_error(400, "Not enough information to find object");
7537         }
7538
7539         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7540                                           hash=>$hash, hash_base=>$hash_base,
7541                                           file_name=>$file_name),
7542                              -status => '302 Found');
7543 }
7544
7545 sub git_blobdiff {
7546         my $format = shift || 'html';
7547         my $diff_style = $input_params{'diff_style'} || 'inline';
7548
7549         my $fd;
7550         my @difftree;
7551         my %diffinfo;
7552         my $expires;
7553
7554         # preparing $fd and %diffinfo for git_patchset_body
7555         # new style URI
7556         if (defined $hash_base && defined $hash_parent_base) {
7557                 if (defined $file_name) {
7558                         # read raw output
7559                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7560                                 $hash_parent_base, $hash_base,
7561                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7562                                 or die_error(500, "Open git-diff-tree failed");
7563                         @difftree = map { chomp; $_ } <$fd>;
7564                         close $fd
7565                                 or die_error(404, "Reading git-diff-tree failed");
7566                         @difftree
7567                                 or die_error(404, "Blob diff not found");
7568
7569                 } elsif (defined $hash &&
7570                          $hash =~ /[0-9a-fA-F]{40}/) {
7571                         # try to find filename from $hash
7572
7573                         # read filtered raw output
7574                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7575                                 $hash_parent_base, $hash_base, "--"
7576                                 or die_error(500, "Open git-diff-tree failed");
7577                         @difftree =
7578                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7579                                 # $hash == to_id
7580                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7581                                 map { chomp; $_ } <$fd>;
7582                         close $fd
7583                                 or die_error(404, "Reading git-diff-tree failed");
7584                         @difftree
7585                                 or die_error(404, "Blob diff not found");
7586
7587                 } else {
7588                         die_error(400, "Missing one of the blob diff parameters");
7589                 }
7590
7591                 if (@difftree > 1) {
7592                         die_error(400, "Ambiguous blob diff specification");
7593                 }
7594
7595                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7596                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7597                 $file_name   ||= $diffinfo{'to_file'};
7598
7599                 $hash_parent ||= $diffinfo{'from_id'};
7600                 $hash        ||= $diffinfo{'to_id'};
7601
7602                 # non-textual hash id's can be cached
7603                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7604                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7605                         $expires = '+1d';
7606                 }
7607
7608                 # open patch output
7609                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7610                         '-p', ($format eq 'html' ? "--full-index" : ()),
7611                         $hash_parent_base, $hash_base,
7612                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7613                         or die_error(500, "Open git-diff-tree failed");
7614         }
7615
7616         # old/legacy style URI -- not generated anymore since 1.4.3.
7617         if (!%diffinfo) {
7618                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7619         }
7620
7621         # header
7622         if ($format eq 'html') {
7623                 my $formats_nav =
7624                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7625                                 "raw");
7626                 $formats_nav .= diff_style_nav($diff_style);
7627                 git_header_html(undef, $expires);
7628                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7629                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7630                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7631                 } else {
7632                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7633                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7634                 }
7635                 if (defined $file_name) {
7636                         git_print_page_path($file_name, "blob", $hash_base);
7637                 } else {
7638                         print "<div class=\"page_path\"></div>\n";
7639                 }
7640
7641         } elsif ($format eq 'plain') {
7642                 print $cgi->header(
7643                         -type => 'text/plain',
7644                         -charset => 'utf-8',
7645                         -expires => $expires,
7646                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7647
7648                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7649
7650         } else {
7651                 die_error(400, "Unknown blobdiff format");
7652         }
7653
7654         # patch
7655         if ($format eq 'html') {
7656                 print "<div class=\"page_body\">\n";
7657
7658                 git_patchset_body($fd, $diff_style,
7659                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7660                 close $fd;
7661
7662                 print "</div>\n"; # class="page_body"
7663                 git_footer_html();
7664
7665         } else {
7666                 while (my $line = <$fd>) {
7667                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7668                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7669
7670                         print $line;
7671
7672                         last if $line =~ m!^\+\+\+!;
7673                 }
7674                 local $/ = undef;
7675                 print <$fd>;
7676                 close $fd;
7677         }
7678 }
7679
7680 sub git_blobdiff_plain {
7681         git_blobdiff('plain');
7682 }
7683
7684 # assumes that it is added as later part of already existing navigation,
7685 # so it returns "| foo | bar" rather than just "foo | bar"
7686 sub diff_style_nav {
7687         my ($diff_style, $is_combined) = @_;
7688         $diff_style ||= 'inline';
7689
7690         return "" if ($is_combined);
7691
7692         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7693         my %styles = @styles;
7694         @styles =
7695                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7696
7697         return join '',
7698                 map { " | ".$_ }
7699                 map {
7700                         $_ eq $diff_style ? $styles{$_} :
7701                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7702                 } @styles;
7703 }
7704
7705 sub git_commitdiff {
7706         my %params = @_;
7707         my $format = $params{-format} || 'html';
7708         my $diff_style = $input_params{'diff_style'} || 'inline';
7709
7710         my ($patch_max) = gitweb_get_feature('patches');
7711         if ($format eq 'patch') {
7712                 die_error(403, "Patch view not allowed") unless $patch_max;
7713         }
7714
7715         $hash ||= $hash_base || "HEAD";
7716         my %co = parse_commit($hash)
7717             or die_error(404, "Unknown commit object");
7718
7719         # choose format for commitdiff for merge
7720         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7721                 $hash_parent = '--cc';
7722         }
7723         # we need to prepare $formats_nav before almost any parameter munging
7724         my $formats_nav;
7725         if ($format eq 'html') {
7726                 $formats_nav =
7727                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7728                                 "raw");
7729                 if ($patch_max && @{$co{'parents'}} <= 1) {
7730                         $formats_nav .= " | " .
7731                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7732                                         "patch");
7733                 }
7734                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7735
7736                 if (defined $hash_parent &&
7737                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7738                         # commitdiff with two commits given
7739                         my $hash_parent_short = $hash_parent;
7740                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7741                                 $hash_parent_short = substr($hash_parent, 0, 7);
7742                         }
7743                         $formats_nav .=
7744                                 ' (from';
7745                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7746                                 if ($co{'parents'}[$i] eq $hash_parent) {
7747                                         $formats_nav .= ' parent ' . ($i+1);
7748                                         last;
7749                                 }
7750                         }
7751                         $formats_nav .= ': ' .
7752                                 $cgi->a({-href => href(-replay=>1,
7753                                                        hash=>$hash_parent, hash_base=>undef)},
7754                                         esc_html($hash_parent_short)) .
7755                                 ')';
7756                 } elsif (!$co{'parent'}) {
7757                         # --root commitdiff
7758                         $formats_nav .= ' (initial)';
7759                 } elsif (scalar @{$co{'parents'}} == 1) {
7760                         # single parent commit
7761                         $formats_nav .=
7762                                 ' (parent: ' .
7763                                 $cgi->a({-href => href(-replay=>1,
7764                                                        hash=>$co{'parent'}, hash_base=>undef)},
7765                                         esc_html(substr($co{'parent'}, 0, 7))) .
7766                                 ')';
7767                 } else {
7768                         # merge commit
7769                         if ($hash_parent eq '--cc') {
7770                                 $formats_nav .= ' | ' .
7771                                         $cgi->a({-href => href(-replay=>1,
7772                                                                hash=>$hash, hash_parent=>'-c')},
7773                                                 'combined');
7774                         } else { # $hash_parent eq '-c'
7775                                 $formats_nav .= ' | ' .
7776                                         $cgi->a({-href => href(-replay=>1,
7777                                                                hash=>$hash, hash_parent=>'--cc')},
7778                                                 'compact');
7779                         }
7780                         $formats_nav .=
7781                                 ' (merge: ' .
7782                                 join(' ', map {
7783                                         $cgi->a({-href => href(-replay=>1,
7784                                                                hash=>$_, hash_base=>undef)},
7785                                                 esc_html(substr($_, 0, 7)));
7786                                 } @{$co{'parents'}} ) .
7787                                 ')';
7788                 }
7789         }
7790
7791         my $hash_parent_param = $hash_parent;
7792         if (!defined $hash_parent_param) {
7793                 # --cc for multiple parents, --root for parentless
7794                 $hash_parent_param =
7795                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7796         }
7797
7798         # read commitdiff
7799         my $fd;
7800         my @difftree;
7801         if ($format eq 'html') {
7802                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7803                         "--no-commit-id", "--patch-with-raw", "--full-index",
7804                         $hash_parent_param, $hash, "--"
7805                         or die_error(500, "Open git-diff-tree failed");
7806
7807                 while (my $line = <$fd>) {
7808                         chomp $line;
7809                         # empty line ends raw part of diff-tree output
7810                         last unless $line;
7811                         push @difftree, scalar parse_difftree_raw_line($line);
7812                 }
7813
7814         } elsif ($format eq 'plain') {
7815                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7816                         '-p', $hash_parent_param, $hash, "--"
7817                         or die_error(500, "Open git-diff-tree failed");
7818         } elsif ($format eq 'patch') {
7819                 # For commit ranges, we limit the output to the number of
7820                 # patches specified in the 'patches' feature.
7821                 # For single commits, we limit the output to a single patch,
7822                 # diverging from the git-format-patch default.
7823                 my @commit_spec = ();
7824                 if ($hash_parent) {
7825                         if ($patch_max > 0) {
7826                                 push @commit_spec, "-$patch_max";
7827                         }
7828                         push @commit_spec, '-n', "$hash_parent..$hash";
7829                 } else {
7830                         if ($params{-single}) {
7831                                 push @commit_spec, '-1';
7832                         } else {
7833                                 if ($patch_max > 0) {
7834                                         push @commit_spec, "-$patch_max";
7835                                 }
7836                                 push @commit_spec, "-n";
7837                         }
7838                         push @commit_spec, '--root', $hash;
7839                 }
7840                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7841                         '--encoding=utf8', '--stdout', @commit_spec
7842                         or die_error(500, "Open git-format-patch failed");
7843         } else {
7844                 die_error(400, "Unknown commitdiff format");
7845         }
7846
7847         # non-textual hash id's can be cached
7848         my $expires;
7849         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7850                 $expires = "+1d";
7851         }
7852
7853         # write commit message
7854         if ($format eq 'html') {
7855                 my $refs = git_get_references();
7856                 my $ref = format_ref_marker($refs, $co{'id'});
7857
7858                 git_header_html(undef, $expires);
7859                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7860                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7861                 print "<div class=\"title_text\">\n" .
7862                       "<table class=\"object_header\">\n";
7863                 git_print_authorship_rows(\%co);
7864                 print "</table>".
7865                       "</div>\n";
7866                 print "<div class=\"page_body\">\n";
7867                 if (@{$co{'comment'}} > 1) {
7868                         print "<div class=\"log\">\n";
7869                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7870                         print "</div>\n"; # class="log"
7871                 }
7872
7873         } elsif ($format eq 'plain') {
7874                 my $refs = git_get_references("tags");
7875                 my $tagname = git_get_rev_name_tags($hash);
7876                 my $filename = basename($project) . "-$hash.patch";
7877
7878                 print $cgi->header(
7879                         -type => 'text/plain',
7880                         -charset => 'utf-8',
7881                         -expires => $expires,
7882                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7883                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7884                 print "From: " . to_utf8($co{'author'}) . "\n";
7885                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7886                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7887
7888                 print "X-Git-Tag: $tagname\n" if $tagname;
7889                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7890
7891                 foreach my $line (@{$co{'comment'}}) {
7892                         print to_utf8($line) . "\n";
7893                 }
7894                 print "---\n\n";
7895         } elsif ($format eq 'patch') {
7896                 my $filename = basename($project) . "-$hash.patch";
7897
7898                 print $cgi->header(
7899                         -type => 'text/plain',
7900                         -charset => 'utf-8',
7901                         -expires => $expires,
7902                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7903         }
7904
7905         # write patch
7906         if ($format eq 'html') {
7907                 my $use_parents = !defined $hash_parent ||
7908                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7909                 git_difftree_body(\@difftree, $hash,
7910                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7911                 print "<br/>\n";
7912
7913                 git_patchset_body($fd, $diff_style,
7914                                   \@difftree, $hash,
7915                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7916                 close $fd;
7917                 print "</div>\n"; # class="page_body"
7918                 git_footer_html();
7919
7920         } elsif ($format eq 'plain') {
7921                 local $/ = undef;
7922                 print <$fd>;
7923                 close $fd
7924                         or print "Reading git-diff-tree failed\n";
7925         } elsif ($format eq 'patch') {
7926                 local $/ = undef;
7927                 print <$fd>;
7928                 close $fd
7929                         or print "Reading git-format-patch failed\n";
7930         }
7931 }
7932
7933 sub git_commitdiff_plain {
7934         git_commitdiff(-format => 'plain');
7935 }
7936
7937 # format-patch-style patches
7938 sub git_patch {
7939         git_commitdiff(-format => 'patch', -single => 1);
7940 }
7941
7942 sub git_patches {
7943         git_commitdiff(-format => 'patch');
7944 }
7945
7946 sub git_history {
7947         git_log_generic('history', \&git_history_body,
7948                         $hash_base, $hash_parent_base,
7949                         $file_name, $hash);
7950 }
7951
7952 sub git_search {
7953         $searchtype ||= 'commit';
7954
7955         # check if appropriate features are enabled
7956         gitweb_check_feature('search')
7957                 or die_error(403, "Search is disabled");
7958         if ($searchtype eq 'pickaxe') {
7959                 # pickaxe may take all resources of your box and run for several minutes
7960                 # with every query - so decide by yourself how public you make this feature
7961                 gitweb_check_feature('pickaxe')
7962                         or die_error(403, "Pickaxe search is disabled");
7963         }
7964         if ($searchtype eq 'grep') {
7965                 # grep search might be potentially CPU-intensive, too
7966                 gitweb_check_feature('grep')
7967                         or die_error(403, "Grep search is disabled");
7968         }
7969
7970         if (!defined $searchtext) {
7971                 die_error(400, "Text field is empty");
7972         }
7973         if (!defined $hash) {
7974                 $hash = git_get_head_hash($project);
7975         }
7976         my %co = parse_commit($hash);
7977         if (!%co) {
7978                 die_error(404, "Unknown commit object");
7979         }
7980         if (!defined $page) {
7981                 $page = 0;
7982         }
7983
7984         if ($searchtype eq 'commit' ||
7985             $searchtype eq 'author' ||
7986             $searchtype eq 'committer') {
7987                 git_search_message(%co);
7988         } elsif ($searchtype eq 'pickaxe') {
7989                 git_search_changes(%co);
7990         } elsif ($searchtype eq 'grep') {
7991                 git_search_files(%co);
7992         } else {
7993                 die_error(400, "Unknown search type");
7994         }
7995 }
7996
7997 sub git_search_help {
7998         git_header_html();
7999         git_print_page_nav('','', $hash,$hash,$hash);
8000         print <<EOT;
8001 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8002 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8003 the pattern entered is recognized as the POSIX extended
8004 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8005 insensitive).</p>
8006 <dl>
8007 <dt><b>commit</b></dt>
8008 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8009 EOT
8010         my $have_grep = gitweb_check_feature('grep');
8011         if ($have_grep) {
8012                 print <<EOT;
8013 <dt><b>grep</b></dt>
8014 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8015     a different one) are searched for the given pattern. On large trees, this search can take
8016 a while and put some strain on the server, so please use it with some consideration. Note that
8017 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8018 case-sensitive.</dd>
8019 EOT
8020         }
8021         print <<EOT;
8022 <dt><b>author</b></dt>
8023 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8024 <dt><b>committer</b></dt>
8025 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8026 EOT
8027         my $have_pickaxe = gitweb_check_feature('pickaxe');
8028         if ($have_pickaxe) {
8029                 print <<EOT;
8030 <dt><b>pickaxe</b></dt>
8031 <dd>All commits that caused the string to appear or disappear from any file (changes that
8032 added, removed or "modified" the string) will be listed. This search can take a while and
8033 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8034 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8035 EOT
8036         }
8037         print "</dl>\n";
8038         git_footer_html();
8039 }
8040
8041 sub git_shortlog {
8042         git_log_generic('shortlog', \&git_shortlog_body,
8043                         $hash, $hash_parent);
8044 }
8045
8046 ## ......................................................................
8047 ## feeds (RSS, Atom; OPML)
8048
8049 sub git_feed {
8050         my $format = shift || 'atom';
8051         my $have_blame = gitweb_check_feature('blame');
8052
8053         # Atom: http://www.atomenabled.org/developers/syndication/
8054         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8055         if ($format ne 'rss' && $format ne 'atom') {
8056                 die_error(400, "Unknown web feed format");
8057         }
8058
8059         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8060         my $head = $hash || 'HEAD';
8061         my @commitlist = parse_commits($head, 150, 0, $file_name);
8062
8063         my %latest_commit;
8064         my %latest_date;
8065         my $content_type = "application/$format+xml";
8066         if (defined $cgi->http('HTTP_ACCEPT') &&
8067                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8068                 # browser (feed reader) prefers text/xml
8069                 $content_type = 'text/xml';
8070         }
8071         if (defined($commitlist[0])) {
8072                 %latest_commit = %{$commitlist[0]};
8073                 my $latest_epoch = $latest_commit{'committer_epoch'};
8074                 exit_if_unmodified_since($latest_epoch);
8075                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8076         }
8077         print $cgi->header(
8078                 -type => $content_type,
8079                 -charset => 'utf-8',
8080                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8081                 -status => '200 OK');
8082
8083         # Optimization: skip generating the body if client asks only
8084         # for Last-Modified date.
8085         return if ($cgi->request_method() eq 'HEAD');
8086
8087         # header variables
8088         my $title = "$site_name - $project/$action";
8089         my $feed_type = 'log';
8090         if (defined $hash) {
8091                 $title .= " - '$hash'";
8092                 $feed_type = 'branch log';
8093                 if (defined $file_name) {
8094                         $title .= " :: $file_name";
8095                         $feed_type = 'history';
8096                 }
8097         } elsif (defined $file_name) {
8098                 $title .= " - $file_name";
8099                 $feed_type = 'history';
8100         }
8101         $title .= " $feed_type";
8102         $title = esc_html($title);
8103         my $descr = git_get_project_description($project);
8104         if (defined $descr) {
8105                 $descr = esc_html($descr);
8106         } else {
8107                 $descr = "$project " .
8108                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8109                          " feed";
8110         }
8111         my $owner = git_get_project_owner($project);
8112         $owner = esc_html($owner);
8113
8114         #header
8115         my $alt_url;
8116         if (defined $file_name) {
8117                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8118         } elsif (defined $hash) {
8119                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8120         } else {
8121                 $alt_url = href(-full=>1, action=>"summary");
8122         }
8123         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8124         if ($format eq 'rss') {
8125                 print <<XML;
8126 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8127 <channel>
8128 XML
8129                 print "<title>$title</title>\n" .
8130                       "<link>$alt_url</link>\n" .
8131                       "<description>$descr</description>\n" .
8132                       "<language>en</language>\n" .
8133                       # project owner is responsible for 'editorial' content
8134                       "<managingEditor>$owner</managingEditor>\n";
8135                 if (defined $logo || defined $favicon) {
8136                         # prefer the logo to the favicon, since RSS
8137                         # doesn't allow both
8138                         my $img = esc_url($logo || $favicon);
8139                         print "<image>\n" .
8140                               "<url>$img</url>\n" .
8141                               "<title>$title</title>\n" .
8142                               "<link>$alt_url</link>\n" .
8143                               "</image>\n";
8144                 }
8145                 if (%latest_date) {
8146                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8147                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8148                 }
8149                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8150         } elsif ($format eq 'atom') {
8151                 print <<XML;
8152 <feed xmlns="http://www.w3.org/2005/Atom">
8153 XML
8154                 print "<title>$title</title>\n" .
8155                       "<subtitle>$descr</subtitle>\n" .
8156                       '<link rel="alternate" type="text/html" href="' .
8157                       $alt_url . '" />' . "\n" .
8158                       '<link rel="self" type="' . $content_type . '" href="' .
8159                       $cgi->self_url() . '" />' . "\n" .
8160                       "<id>" . href(-full=>1) . "</id>\n" .
8161                       # use project owner for feed author
8162                       "<author><name>$owner</name></author>\n";
8163                 if (defined $favicon) {
8164                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8165                 }
8166                 if (defined $logo) {
8167                         # not twice as wide as tall: 72 x 27 pixels
8168                         print "<logo>" . esc_url($logo) . "</logo>\n";
8169                 }
8170                 if (! %latest_date) {
8171                         # dummy date to keep the feed valid until commits trickle in:
8172                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8173                 } else {
8174                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8175                 }
8176                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8177         }
8178
8179         # contents
8180         for (my $i = 0; $i <= $#commitlist; $i++) {
8181                 my %co = %{$commitlist[$i]};
8182                 my $commit = $co{'id'};
8183                 # we read 150, we always show 30 and the ones more recent than 48 hours
8184                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8185                         last;
8186                 }
8187                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8188
8189                 # get list of changed files
8190                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8191                         $co{'parent'} || "--root",
8192                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8193                         or next;
8194                 my @difftree = map { chomp; $_ } <$fd>;
8195                 close $fd
8196                         or next;
8197
8198                 # print element (entry, item)
8199                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8200                 if ($format eq 'rss') {
8201                         print "<item>\n" .
8202                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8203                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8204                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8205                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8206                               "<link>$co_url</link>\n" .
8207                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8208                               "<content:encoded>" .
8209                               "<![CDATA[\n";
8210                 } elsif ($format eq 'atom') {
8211                         print "<entry>\n" .
8212                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8213                               "<updated>$cd{'iso-8601'}</updated>\n" .
8214                               "<author>\n" .
8215                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8216                         if ($co{'author_email'}) {
8217                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8218                         }
8219                         print "</author>\n" .
8220                               # use committer for contributor
8221                               "<contributor>\n" .
8222                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8223                         if ($co{'committer_email'}) {
8224                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8225                         }
8226                         print "</contributor>\n" .
8227                               "<published>$cd{'iso-8601'}</published>\n" .
8228                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8229                               "<id>$co_url</id>\n" .
8230                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8231                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8232                 }
8233                 my $comment = $co{'comment'};
8234                 print "<pre>\n";
8235                 foreach my $line (@$comment) {
8236                         $line = esc_html($line);
8237                         print "$line\n";
8238                 }
8239                 print "</pre><ul>\n";
8240                 foreach my $difftree_line (@difftree) {
8241                         my %difftree = parse_difftree_raw_line($difftree_line);
8242                         next if !$difftree{'from_id'};
8243
8244                         my $file = $difftree{'file'} || $difftree{'to_file'};
8245
8246                         print "<li>" .
8247                               "[" .
8248                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8249                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8250                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8251                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8252                                       -title => "diff"}, 'D');
8253                         if ($have_blame) {
8254                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8255                                                              file_name=>$file, hash_base=>$commit),
8256                                               -title => "blame"}, 'B');
8257                         }
8258                         # if this is not a feed of a file history
8259                         if (!defined $file_name || $file_name ne $file) {
8260                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8261                                                              file_name=>$file, hash=>$commit),
8262                                               -title => "history"}, 'H');
8263                         }
8264                         $file = esc_path($file);
8265                         print "] ".
8266                               "$file</li>\n";
8267                 }
8268                 if ($format eq 'rss') {
8269                         print "</ul>]]>\n" .
8270                               "</content:encoded>\n" .
8271                               "</item>\n";
8272                 } elsif ($format eq 'atom') {
8273                         print "</ul>\n</div>\n" .
8274                               "</content>\n" .
8275                               "</entry>\n";
8276                 }
8277         }
8278
8279         # end of feed
8280         if ($format eq 'rss') {
8281                 print "</channel>\n</rss>\n";
8282         } elsif ($format eq 'atom') {
8283                 print "</feed>\n";
8284         }
8285 }
8286
8287 sub git_rss {
8288         git_feed('rss');
8289 }
8290
8291 sub git_atom {
8292         git_feed('atom');
8293 }
8294
8295 sub git_opml {
8296         my @list = git_get_projects_list($project_filter, $strict_export);
8297         if (!@list) {
8298                 die_error(404, "No projects found");
8299         }
8300
8301         print $cgi->header(
8302                 -type => 'text/xml',
8303                 -charset => 'utf-8',
8304                 -content_disposition => 'inline; filename="opml.xml"');
8305
8306         my $title = esc_html($site_name);
8307         my $filter = " within subdirectory ";
8308         if (defined $project_filter) {
8309                 $filter .= esc_html($project_filter);
8310         } else {
8311                 $filter = "";
8312         }
8313         print <<XML;
8314 <?xml version="1.0" encoding="utf-8"?>
8315 <opml version="1.0">
8316 <head>
8317   <title>$title OPML Export$filter</title>
8318 </head>
8319 <body>
8320 <outline text="git RSS feeds">
8321 XML
8322
8323         foreach my $pr (@list) {
8324                 my %proj = %$pr;
8325                 my $head = git_get_head_hash($proj{'path'});
8326                 if (!defined $head) {
8327                         next;
8328                 }
8329                 $git_dir = "$projectroot/$proj{'path'}";
8330                 my %co = parse_commit($head);
8331                 if (!%co) {
8332                         next;
8333                 }
8334
8335                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8336                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8337                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8338                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8339         }
8340         print <<XML;
8341 </outline>
8342 </body>
8343 </opml>
8344 XML
8345 }