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>";
5661         if ($check_forks) {
5662                 print "<td colspan=\"2\">&nbsp;</td>";
5663         } else {
5664                 print "<td colspan=\"1\">&nbsp;</td>";
5665         }
5666         print "<td>".($to + 1)." project".($to = 1 ? "s" : "")." found</td><td colspan=\"3\">&nbsp;</td></tr>";
5667 }
5668
5669 sub git_project_list_body {
5670         # actually uses global variable $project
5671         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5672         my @projects = @$projlist;
5673
5674         my $check_forks = gitweb_check_feature('forks');
5675         my $show_ctags  = gitweb_check_feature('ctags');
5676         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5677         $check_forks = undef
5678                 if ($tagfilter || $search_regexp);
5679
5680         # filtering out forks before filling info allows to do less work
5681         @projects = filter_forks_from_projects_list(\@projects)
5682                 if ($check_forks);
5683         # search_projects_list pre-fills required info
5684         @projects = search_projects_list(\@projects,
5685                                          'search_regexp' => $search_regexp,
5686                                          'tagfilter'  => $tagfilter)
5687                 if ($tagfilter || $search_regexp);
5688         # fill the rest
5689         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5690         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5691         push @all_fields, 'owner' unless($omit_owner);
5692         @projects = fill_project_list_info(\@projects, @all_fields);
5693
5694         $order ||= $default_projects_order;
5695         $from = 0 unless defined $from;
5696         $to = $#projects if (!defined $to || $#projects < $to);
5697
5698         # short circuit
5699         if ($from > $to) {
5700                 print "<center>\n".
5701                       "<b>No such projects found</b><br />\n".
5702                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5703                       "</center>\n<br />\n";
5704                 return;
5705         }
5706
5707         @projects = sort_projects_list(\@projects, $order);
5708
5709         if ($show_ctags) {
5710                 my $ctags = git_gather_all_ctags(\@projects);
5711                 my $cloud = git_populate_project_tagcloud($ctags);
5712                 print git_show_project_tagcloud($cloud, 64);
5713         }
5714
5715         print "<table class=\"project_list\">\n";
5716         unless ($no_header) {
5717                 print "<tr>\n";
5718                 if ($check_forks) {
5719                         print "<th></th>\n";
5720                 }
5721                 print_sort_th('project', $order, 'Project');
5722                 print_sort_th('descr', $order, 'Description');
5723                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5724                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5725                 print "<th></th>\n" . # for links
5726                       "</tr>\n";
5727         }
5728
5729         if ($projects_list_group_categories) {
5730                 # only display categories with projects in the $from-$to window
5731                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5732                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5733                 foreach my $cat (sort keys %categories) {
5734                         unless ($cat eq "") {
5735                                 print "<tr>\n";
5736                                 if ($check_forks) {
5737                                         print "<td></td>\n";
5738                                 }
5739                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5740                                 print "</tr>\n";
5741                         }
5742
5743                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5744                 }
5745         } else {
5746                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5747         }
5748
5749         if (defined $extra) {
5750                 print "<tr>\n";
5751                 if ($check_forks) {
5752                         print "<td></td>\n";
5753                 }
5754                 print "<td colspan=\"5\">$extra</td>\n" .
5755                       "</tr>\n";
5756         }
5757         print "</table>\n";
5758 }
5759
5760 sub git_log_body {
5761         # uses global variable $project
5762         my ($commitlist, $from, $to, $refs, $extra) = @_;
5763
5764         $from = 0 unless defined $from;
5765         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5766
5767         for (my $i = 0; $i <= $to; $i++) {
5768                 my %co = %{$commitlist->[$i]};
5769                 next if !%co;
5770                 my $commit = $co{'id'};
5771                 my $ref = format_ref_marker($refs, $commit);
5772                 git_print_header_div('commit',
5773                                "<span class=\"age\">$co{'age_string'}</span>" .
5774                                esc_html($co{'title'}) . $ref,
5775                                $commit);
5776                 print "<div class=\"title_text\">\n" .
5777                       "<div class=\"log_link\">\n" .
5778                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5779                       " | " .
5780                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5781                       " | " .
5782                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5783                       "<br/>\n" .
5784                       "</div>\n";
5785                       git_print_authorship(\%co, -tag => 'span');
5786                       print "<br/>\n</div>\n";
5787
5788                 print "<div class=\"log_body\">\n";
5789                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5790                 print "</div>\n";
5791         }
5792         if ($extra) {
5793                 print "<div class=\"page_nav\">\n";
5794                 print "$extra\n";
5795                 print "</div>\n";
5796         }
5797 }
5798
5799 sub git_shortlog_body {
5800         # uses global variable $project
5801         my ($commitlist, $from, $to, $refs, $extra, $file_name, $file_hash, $ftype, $allrefs) = @_;
5802
5803         $from = 0 unless defined $from;
5804         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5805
5806         print "<table class=\"shortlog\" cellspacing=\"0\" cellpadding=\"0\">\n";
5807         my $alternate = 1;
5808         my $graph_rand = int(rand(99999));
5809         my $head = git_get_head_hash($project);
5810         my $graph_hash;
5811         if (defined $allrefs && $allrefs == 1) {
5812                 $graph_hash = "all";
5813         }
5814         if (!defined $hash) {
5815                 $hash = $head;
5816         }
5817         if(!defined $graph_hash) {
5818                 $graph_hash = $hash;
5819         }
5820         if (!defined $page) {
5821                 $page = 0;
5822         }
5823         print "<tr class=\"header\">\n";
5824         print "<td colspan=\"2\"><img class=\"graph\" src=\"git_graph.php?r=".$graph_rand.";p=".$project.";h=".$graph_hash.";from=".($from + (100 * $page)).";to=".($to + (100 * $page)).";c=header\" /></td>\n";
5825         print "<td valign=\"bottom\"><b>Author</b></td>\n";
5826         print "<td valign=\"bottom\"><b>Commit</b></td>\n";
5827         print "<td></td>\n";
5828         print "</tr>\n";
5829
5830         for (my $i = $from; $i <= $to; $i++) {
5831                 my %co = %{$commitlist->[$i]};
5832                 my $commit = $co{'id'};
5833                 my $ref = format_ref_marker($refs, $commit);
5834                 if ($alternate) {
5835                         print "<tr class=\"dark\">\n";
5836                 } else {
5837                         print "<tr class=\"light\">\n";
5838                 }
5839                 $alternate ^= 1;
5840                 print "<td><img class=\"graph\" src=\"git_graph.php?r=".$graph_rand.";p=".$project.";h=".$graph_hash.";from=".($from + (100 * $page)).";to=".($to + (100 * $page)).";c=".$commit."\" /></td>";
5841                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5842                 print "<td class=\"". age_class($co{'age'}) . "\" title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5843                       format_author_html('td', \%co, 10) . "<td>";
5844                 print format_subject_html($co{'title'}, $co{'title_short'},
5845                                           href(action=>"commit", hash=>$commit), $ref);
5846                 print "</td>\n" .
5847                       "<td class=\"link\">" .
5848                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5849                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5850                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5851                 my $snapshot_links = format_snapshot_links($commit);
5852                 if (defined $snapshot_links) {
5853                         print " | " . $snapshot_links;
5854                 }
5855                 print "</td>\n" .
5856                       "</tr>\n";
5857         }
5858         if (defined $extra) {
5859                 print "<tr>\n" .
5860                       "<td colspan=\"4\">$extra</td>\n" .
5861                       "</tr>\n";
5862         }
5863         print "</table>\n";
5864 }
5865
5866 sub git_history_body {
5867         # Warning: assumes constant type (blob or tree) during history
5868         my ($commitlist, $from, $to, $refs, $extra,
5869             $file_name, $file_hash, $ftype) = @_;
5870
5871         $from = 0 unless defined $from;
5872         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5873
5874         print "<table class=\"history\">\n";
5875         my $alternate = 1;
5876         for (my $i = $from; $i <= $to; $i++) {
5877                 my %co = %{$commitlist->[$i]};
5878                 if (!%co) {
5879                         next;
5880                 }
5881                 my $commit = $co{'id'};
5882
5883                 my $ref = format_ref_marker($refs, $commit);
5884
5885                 if ($alternate) {
5886                         print "<tr class=\"dark\">\n";
5887                 } else {
5888                         print "<tr class=\"light\">\n";
5889                 }
5890                 $alternate ^= 1;
5891                 print "<td class=\"". age_class($co{'age'}) . "\" title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5892         # shortlog:   format_author_html('td', \%co, 10)
5893                       format_author_html('td', \%co, 15, 3) . "<td>";
5894                 # originally git_history used chop_str($co{'title'}, 50)
5895                 print format_subject_html($co{'title'}, $co{'title_short'},
5896                                           href(action=>"commit", hash=>$commit), $ref);
5897                 print "</td>\n" .
5898                       "<td class=\"link\">" .
5899                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5900                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5901
5902                 if ($ftype eq 'blob') {
5903                         my $blob_current = $file_hash;
5904                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5905                         if (defined $blob_current && defined $blob_parent &&
5906                                         $blob_current ne $blob_parent) {
5907                                 print " | " .
5908                                         $cgi->a({-href => href(action=>"blobdiff",
5909                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5910                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5911                                                                file_name=>$file_name)},
5912                                                 "diff to current");
5913                         }
5914                 }
5915                 print "</td>\n" .
5916                       "</tr>\n";
5917         }
5918         if (defined $extra) {
5919                 print "<tr>\n" .
5920                       "<td colspan=\"4\">$extra</td>\n" .
5921                       "</tr>\n";
5922         }
5923         print "</table>\n";
5924 }
5925
5926 sub git_tags_body {
5927         # uses global variable $project
5928         my ($taglist, $from, $to, $extra) = @_;
5929         $from = 0 unless defined $from;
5930         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5931
5932         print "<table class=\"tags\">\n";
5933         my $alternate = 1;
5934         for (my $i = $from; $i <= $to; $i++) {
5935                 my $entry = $taglist->[$i];
5936                 my %tag = %$entry;
5937                 my $comment = $tag{'subject'};
5938                 my $comment_short;
5939                 if (defined $comment) {
5940                         $comment_short = chop_str($comment, 30, 5);
5941                 }
5942                 if ($alternate) {
5943                         print "<tr class=\"dark\">\n";
5944                 } else {
5945                         print "<tr class=\"light\">\n";
5946                 }
5947                 $alternate ^= 1;
5948                 if (defined $tag{'age'}) {
5949                         print "<td><i>$tag{'age'}</i></td>\n";
5950                 } else {
5951                         print "<td></td>\n";
5952                 }
5953                 print "<td>" .
5954                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5955                                -class => "list name"}, esc_html($tag{'name'})) .
5956                       "</td>\n" .
5957                       "<td>";
5958                 if (defined $comment) {
5959                         print format_subject_html($comment, $comment_short,
5960                                                   href(action=>"tag", hash=>$tag{'id'}));
5961                 }
5962                 print "</td>\n" .
5963                       "<td class=\"selflink\">";
5964                 if ($tag{'type'} eq "tag") {
5965                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5966                 } else {
5967                         print "&nbsp;";
5968                 }
5969                 print "</td>\n" .
5970                       "<td class=\"link\">" . " | " .
5971                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5972                 if ($tag{'reftype'} eq "commit") {
5973                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5974                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5975                 } elsif ($tag{'reftype'} eq "blob") {
5976                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5977                 }
5978                 print "</td>\n" .
5979                       "</tr>";
5980         }
5981         if (defined $extra) {
5982                 print "<tr>\n" .
5983                       "<td colspan=\"5\">$extra</td>\n" .
5984                       "</tr>\n";
5985         }
5986         print "</table>\n";
5987 }
5988
5989 sub git_heads_body {
5990         # uses global variable $project
5991         my ($headlist, $head_at, $from, $to, $extra) = @_;
5992         $from = 0 unless defined $from;
5993         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5994
5995         print "<table class=\"heads\">\n";
5996         my $alternate = 1;
5997         for (my $i = $from; $i <= $to; $i++) {
5998                 my $entry = $headlist->[$i];
5999                 my %ref = %$entry;
6000                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6001                 if ($alternate) {
6002                         print "<tr class=\"dark\">\n";
6003                 } else {
6004                         print "<tr class=\"light\">\n";
6005                 }
6006                 $alternate ^= 1;
6007                 print "<td><i>$ref{'age'}</i></td>\n" .
6008                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6009                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6010                                -class => "list name"},esc_html($ref{'name'})) .
6011                       "</td>\n" .
6012                       "<td class=\"link\">" .
6013                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6014                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6015                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6016                       "</td>\n" .
6017                       "</tr>";
6018         }
6019         if (defined $extra) {
6020                 print "<tr>\n" .
6021                       "<td colspan=\"3\">$extra</td>\n" .
6022                       "</tr>\n";
6023         }
6024         print "</table>\n";
6025 }
6026
6027 # Display a single remote block
6028 sub git_remote_block {
6029         my ($remote, $rdata, $limit, $head) = @_;
6030
6031         my $heads = $rdata->{'heads'};
6032         my $fetch = $rdata->{'fetch'};
6033         my $push = $rdata->{'push'};
6034
6035         my $urls_table = "<table class=\"projects_list\">\n" ;
6036
6037         if (defined $fetch) {
6038                 if ($fetch eq $push) {
6039                         $urls_table .= format_repo_url("URL", $fetch);
6040                 } else {
6041                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6042                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6043                 }
6044         } elsif (defined $push) {
6045                 $urls_table .= format_repo_url("Push URL", $push);
6046         } else {
6047                 $urls_table .= format_repo_url("", "No remote URL");
6048         }
6049
6050         $urls_table .= "</table>\n";
6051
6052         my $dots;
6053         if (defined $limit && $limit < @$heads) {
6054                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6055         }
6056
6057         print $urls_table;
6058         git_heads_body($heads, $head, 0, $limit, $dots);
6059 }
6060
6061 # Display a list of remote names with the respective fetch and push URLs
6062 sub git_remotes_list {
6063         my ($remotedata, $limit) = @_;
6064         print "<table class=\"heads\">\n";
6065         my $alternate = 1;
6066         my @remotes = sort keys %$remotedata;
6067
6068         my $limited = $limit && $limit < @remotes;
6069
6070         $#remotes = $limit - 1 if $limited;
6071
6072         while (my $remote = shift @remotes) {
6073                 my $rdata = $remotedata->{$remote};
6074                 my $fetch = $rdata->{'fetch'};
6075                 my $push = $rdata->{'push'};
6076                 if ($alternate) {
6077                         print "<tr class=\"dark\">\n";
6078                 } else {
6079                         print "<tr class=\"light\">\n";
6080                 }
6081                 $alternate ^= 1;
6082                 print "<td>" .
6083                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6084                                -class=> "list name"},esc_html($remote)) .
6085                       "</td>";
6086                 print "<td class=\"link\">" .
6087                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6088                       " | " .
6089                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6090                       "</td>";
6091
6092                 print "</tr>\n";
6093         }
6094
6095         if ($limited) {
6096                 print "<tr>\n" .
6097                       "<td colspan=\"3\">" .
6098                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6099                       "</td>\n" . "</tr>\n";
6100         }
6101
6102         print "</table>";
6103 }
6104
6105 # Display remote heads grouped by remote, unless there are too many
6106 # remotes, in which case we only display the remote names
6107 sub git_remotes_body {
6108         my ($remotedata, $limit, $head) = @_;
6109         if ($limit and $limit < keys %$remotedata) {
6110                 git_remotes_list($remotedata, $limit);
6111         } else {
6112                 fill_remote_heads($remotedata);
6113                 while (my ($remote, $rdata) = each %$remotedata) {
6114                         git_print_section({-class=>"remote", -id=>$remote},
6115                                 ["remotes", $remote, $remote], sub {
6116                                         git_remote_block($remote, $rdata, $limit, $head);
6117                                 });
6118                 }
6119         }
6120 }
6121
6122 sub git_search_message {
6123         my %co = @_;
6124
6125         my $greptype;
6126         if ($searchtype eq 'commit') {
6127                 $greptype = "--grep=";
6128         } elsif ($searchtype eq 'author') {
6129                 $greptype = "--author=";
6130         } elsif ($searchtype eq 'committer') {
6131                 $greptype = "--committer=";
6132         }
6133         $greptype .= $searchtext;
6134         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6135                                        $greptype, '--regexp-ignore-case',
6136                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6137
6138         my $paging_nav = '';
6139         if ($page > 0) {
6140                 $paging_nav .=
6141                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6142                                 "first") .
6143                         " &sdot; " .
6144                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6145                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6146         } else {
6147                 $paging_nav .= "first &sdot; prev";
6148         }
6149         my $next_link = '';
6150         if ($#commitlist >= 100) {
6151                 $next_link =
6152                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6153                                  -accesskey => "n", -title => "Alt-n"}, "next");
6154                 $paging_nav .= " &sdot; $next_link";
6155         } else {
6156                 $paging_nav .= " &sdot; next";
6157         }
6158
6159         git_header_html();
6160
6161         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6162         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6163         if ($page == 0 && !@commitlist) {
6164                 print "<p>No match.</p>\n";
6165         } else {
6166                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6167         }
6168
6169         git_footer_html();
6170 }
6171
6172 sub git_search_changes {
6173         my %co = @_;
6174
6175         local $/ = "\n";
6176         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6177                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6178                 ($search_use_regexp ? '--pickaxe-regex' : ())
6179                         or die_error(500, "Open git-log failed");
6180
6181         git_header_html();
6182
6183         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6184         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6185
6186         print "<table class=\"pickaxe search\">\n";
6187         my $alternate = 1;
6188         undef %co;
6189         my @files;
6190         while (my $line = <$fd>) {
6191                 chomp $line;
6192                 next unless $line;
6193
6194                 my %set = parse_difftree_raw_line($line);
6195                 if (defined $set{'commit'}) {
6196                         # finish previous commit
6197                         if (%co) {
6198                                 print "</td>\n" .
6199                                       "<td class=\"link\">" .
6200                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6201                                               "commit") .
6202                                       " | " .
6203                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6204                                                              hash_base=>$co{'id'})},
6205                                               "tree") .
6206                                       "</td>\n" .
6207                                       "</tr>\n";
6208                         }
6209
6210                         if ($alternate) {
6211                                 print "<tr class=\"dark\">\n";
6212                         } else {
6213                                 print "<tr class=\"light\">\n";
6214                         }
6215                         $alternate ^= 1;
6216                         %co = parse_commit($set{'commit'});
6217                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6218                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6219                               "<td><i>$author</i></td>\n" .
6220                               "<td>" .
6221                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6222                                       -class => "list subject"},
6223                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6224                 } elsif (defined $set{'to_id'}) {
6225                         next if ($set{'to_id'} =~ m/^0{40}$/);
6226
6227                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6228                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6229                                       -class => "list"},
6230                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6231                               "<br/>\n";
6232                 }
6233         }
6234         close $fd;
6235
6236         # finish last commit (warning: repetition!)
6237         if (%co) {
6238                 print "</td>\n" .
6239                       "<td class=\"link\">" .
6240                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6241                               "commit") .
6242                       " | " .
6243                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6244                                              hash_base=>$co{'id'})},
6245                               "tree") .
6246                       "</td>\n" .
6247                       "</tr>\n";
6248         }
6249
6250         print "</table>\n";
6251
6252         git_footer_html();
6253 }
6254
6255 sub git_search_files {
6256         my %co = @_;
6257
6258         local $/ = "\n";
6259         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6260                 $search_use_regexp ? ('-E', '-i') : '-F',
6261                 $searchtext, $co{'tree'}
6262                         or die_error(500, "Open git-grep failed");
6263
6264         git_header_html();
6265
6266         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6267         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6268
6269         print "<table class=\"grep_search\">\n";
6270         my $alternate = 1;
6271         my $matches = 0;
6272         my $lastfile = '';
6273         my $file_href;
6274         while (my $line = <$fd>) {
6275                 chomp $line;
6276                 my ($file, $lno, $ltext, $binary);
6277                 last if ($matches++ > 1000);
6278                 if ($line =~ /^Binary file (.+) matches$/) {
6279                         $file = $1;
6280                         $binary = 1;
6281                 } else {
6282                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6283                         $file =~ s/^$co{'tree'}://;
6284                 }
6285                 if ($file ne $lastfile) {
6286                         $lastfile and print "</td></tr>\n";
6287                         if ($alternate++) {
6288                                 print "<tr class=\"dark\">\n";
6289                         } else {
6290                                 print "<tr class=\"light\">\n";
6291                         }
6292                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6293                                           file_name=>$file);
6294                         print "<td class=\"list\">".
6295                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6296                         print "</td><td>\n";
6297                         $lastfile = $file;
6298                 }
6299                 if ($binary) {
6300                         print "<div class=\"binary\">Binary file</div>\n";
6301                 } else {
6302                         $ltext = untabify($ltext);
6303                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6304                                 $ltext = esc_html($1, -nbsp=>1);
6305                                 $ltext .= '<span class="match">';
6306                                 $ltext .= esc_html($2, -nbsp=>1);
6307                                 $ltext .= '</span>';
6308                                 $ltext .= esc_html($3, -nbsp=>1);
6309                         } else {
6310                                 $ltext = esc_html($ltext, -nbsp=>1);
6311                         }
6312                         print "<div class=\"pre\">" .
6313                                 $cgi->a({-href => $file_href.'#l'.$lno,
6314                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6315                                 ' ' .  $ltext . "</div>\n";
6316                 }
6317         }
6318         if ($lastfile) {
6319                 print "</td></tr>\n";
6320                 if ($matches > 1000) {
6321                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6322                 }
6323         } else {
6324                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6325         }
6326         close $fd;
6327
6328         print "</table>\n";
6329
6330         git_footer_html();
6331 }
6332
6333 sub git_search_grep_body {
6334         my ($commitlist, $from, $to, $extra) = @_;
6335         $from = 0 unless defined $from;
6336         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6337
6338         print "<table class=\"commit_search\">\n";
6339         my $alternate = 1;
6340         for (my $i = $from; $i <= $to; $i++) {
6341                 my %co = %{$commitlist->[$i]};
6342                 if (!%co) {
6343                         next;
6344                 }
6345                 my $commit = $co{'id'};
6346                 if ($alternate) {
6347                         print "<tr class=\"dark\">\n";
6348                 } else {
6349                         print "<tr class=\"light\">\n";
6350                 }
6351                 $alternate ^= 1;
6352                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6353                       format_author_html('td', \%co, 15, 5) .
6354                       "<td>" .
6355                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6356                                -class => "list subject"},
6357                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6358                 my $comment = $co{'comment'};
6359                 foreach my $line (@$comment) {
6360                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6361                                 my ($lead, $match, $trail) = ($1, $2, $3);
6362                                 $match = chop_str($match, 70, 5, 'center');
6363                                 my $contextlen = int((80 - length($match))/2);
6364                                 $contextlen = 30 if ($contextlen > 30);
6365                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6366                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6367
6368                                 $lead  = esc_html($lead);
6369                                 $match = esc_html($match);
6370                                 $trail = esc_html($trail);
6371
6372                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6373                         }
6374                 }
6375                 print "</td>\n" .
6376                       "<td class=\"link\">" .
6377                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6378                       " | " .
6379                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6380                       " | " .
6381                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6382                 print "</td>\n" .
6383                       "</tr>\n";
6384         }
6385         if (defined $extra) {
6386                 print "<tr>\n" .
6387                       "<td colspan=\"3\">$extra</td>\n" .
6388                       "</tr>\n";
6389         }
6390         print "</table>\n";
6391 }
6392
6393 ## ======================================================================
6394 ## ======================================================================
6395 ## actions
6396
6397 sub git_project_list {
6398         my $order = $input_params{'order'};
6399         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6400                 die_error(400, "Unknown order parameter");
6401         }
6402
6403         my @list = git_get_projects_list($project_filter, $strict_export);
6404         if (!@list) {
6405                 die_error(404, "No projects found");
6406         }
6407
6408         git_header_html();
6409         if (defined $home_text && -f $home_text) {
6410                 print "<div class=\"index_include\">\n";
6411                 insert_file($home_text);
6412                 print "</div>\n";
6413         }
6414
6415         git_project_search_form($searchtext, $search_use_regexp);
6416         git_project_list_body(\@list, $order);
6417         git_footer_html();
6418 }
6419
6420 sub git_forks {
6421         my $order = $input_params{'order'};
6422         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6423                 die_error(400, "Unknown order parameter");
6424         }
6425
6426         my $filter = $project;
6427         $filter =~ s/\.git$//;
6428         my @list = git_get_projects_list($filter);
6429         if (!@list) {
6430                 die_error(404, "No forks found");
6431         }
6432
6433         git_header_html();
6434         git_print_page_nav('','');
6435         git_print_header_div('summary', "$project forks");
6436         git_project_list_body(\@list, $order);
6437         git_footer_html();
6438 }
6439
6440 sub git_project_index {
6441         my @projects = git_get_projects_list($project_filter, $strict_export);
6442         if (!@projects) {
6443                 die_error(404, "No projects found");
6444         }
6445
6446         print $cgi->header(
6447                 -type => 'text/plain',
6448                 -charset => 'utf-8',
6449                 -content_disposition => 'inline; filename="index.aux"');
6450
6451         foreach my $pr (@projects) {
6452                 if (!exists $pr->{'owner'}) {
6453                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6454                 }
6455
6456                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6457                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6458                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6459                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6460                 $path  =~ s/ /\+/g;
6461                 $owner =~ s/ /\+/g;
6462
6463                 print "$path $owner\n";
6464         }
6465 }
6466
6467 sub git_summary {
6468         my $descr = git_get_project_description($project) || "none";
6469         my %co = parse_commit("HEAD");
6470         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6471         my $head = $co{'id'};
6472         my $remote_heads = gitweb_check_feature('remote_heads');
6473
6474         my $owner = git_get_project_owner($project);
6475
6476         my $refs = git_get_references();
6477         # These get_*_list functions return one more to allow us to see if
6478         # there are more ...
6479         my @taglist  = git_get_tags_list(16);
6480         my @headlist = git_get_heads_list(16);
6481         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6482         my @forklist;
6483         my $check_forks = gitweb_check_feature('forks');
6484
6485         if ($check_forks) {
6486                 # find forks of a project
6487                 my $filter = $project;
6488                 $filter =~ s/\.git$//;
6489                 @forklist = git_get_projects_list($filter);
6490                 # filter out forks of forks
6491                 @forklist = filter_forks_from_projects_list(\@forklist)
6492                         if (@forklist);
6493         }
6494
6495         git_header_html();
6496         git_print_page_nav('summary','', $head);
6497
6498         print "<div class=\"title\">&nbsp;</div>\n";
6499         print "<table class=\"projects_list\">\n" .
6500               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6501         unless ($omit_owner) {
6502                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6503         }
6504         if (defined $cd{'rfc2822'}) {
6505                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6506                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6507         }
6508
6509         # use per project git URL list in $projectroot/$project/cloneurl
6510         # or make project git URL from git base URL and project name
6511         my $url_tag = "URL";
6512         my @url_list = git_get_project_url_list($project);
6513         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6514         foreach my $git_url (@url_list) {
6515                 next unless $git_url;
6516                 print format_repo_url($url_tag, $git_url);
6517                 $url_tag = "";
6518         }
6519
6520         # Tag cloud
6521         my $show_ctags = gitweb_check_feature('ctags');
6522         if ($show_ctags) {
6523                 my $ctags = git_get_project_ctags($project);
6524                 if (%$ctags) {
6525                         # without ability to add tags, don't show if there are none
6526                         my $cloud = git_populate_project_tagcloud($ctags);
6527                         print "<tr id=\"metadata_ctags\">" .
6528                               "<td>content tags</td>" .
6529                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6530                               "</tr>\n";
6531                 }
6532         }
6533
6534         print "</table>\n";
6535
6536         # If XSS prevention is on, we don't include README.html.
6537         # TODO: Allow a readme in some safe format.
6538         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6539                 print "<div class=\"title\">readme</div>\n" .
6540                       "<div class=\"readme\">\n";
6541                 insert_file("$projectroot/$project/README.html");
6542                 print "\n</div>\n"; # class="readme"
6543         }
6544
6545         # we need to request one more than 16 (0..15) to check if
6546         # those 16 are all
6547         my @commitlist = $head ? parse_commits("--all", 17) : ();
6548         if (@commitlist) {
6549                 git_print_header_div('shortlog');
6550                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6551                                   $#commitlist <=  15 ? undef :
6552                                   $cgi->a({-href => href(action=>"shortlog")}, "..."), 0, 0, 0, 1);;
6553         }
6554
6555         if (@taglist) {
6556                 git_print_header_div('tags');
6557                 git_tags_body(\@taglist, 0, 15,
6558                               $#taglist <=  15 ? undef :
6559                               $cgi->a({-href => href(action=>"tags")}, "..."));
6560         }
6561
6562         if (@headlist) {
6563                 git_print_header_div('heads');
6564                 git_heads_body(\@headlist, $head, 0, 15,
6565                                $#headlist <= 15 ? undef :
6566                                $cgi->a({-href => href(action=>"heads")}, "..."));
6567         }
6568
6569         if (%remotedata) {
6570                 git_print_header_div('remotes');
6571                 git_remotes_body(\%remotedata, 15, $head);
6572         }
6573
6574         if (@forklist) {
6575                 git_print_header_div('forks');
6576                 git_project_list_body(\@forklist, 'age', 0, 15,
6577                                       $#forklist <= 15 ? undef :
6578                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6579                                       'no_header');
6580         }
6581
6582         git_footer_html();
6583 }
6584
6585 sub git_tag {
6586         my %tag = parse_tag($hash);
6587
6588         if (! %tag) {
6589                 die_error(404, "Unknown tag object");
6590         }
6591
6592         my $head = git_get_head_hash($project);
6593         git_header_html();
6594         git_print_page_nav('','', $head,undef,$head);
6595         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6596         print "<div class=\"title_text\">\n" .
6597               "<table class=\"object_header\">\n" .
6598               "<tr>\n" .
6599               "<td>object</td>\n" .
6600               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6601                                $tag{'object'}) . "</td>\n" .
6602               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6603                                               $tag{'type'}) . "</td>\n" .
6604               "</tr>\n";
6605         if (defined($tag{'author'})) {
6606                 git_print_authorship_rows(\%tag, 'author');
6607         }
6608         print "</table>\n\n" .
6609               "</div>\n";
6610         print "<div class=\"page_body\">";
6611         my $comment = $tag{'comment'};
6612         foreach my $line (@$comment) {
6613                 chomp $line;
6614                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6615         }
6616         print "</div>\n";
6617         git_footer_html();
6618 }
6619
6620 sub git_blame_common {
6621         my $format = shift || 'porcelain';
6622         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6623                 $format = 'incremental';
6624                 $action = 'blame_incremental'; # for page title etc
6625         }
6626
6627         # permissions
6628         gitweb_check_feature('blame')
6629                 or die_error(403, "Blame view not allowed");
6630
6631         # error checking
6632         die_error(400, "No file name given") unless $file_name;
6633         $hash_base ||= git_get_head_hash($project);
6634         die_error(404, "Couldn't find base commit") unless $hash_base;
6635         my %co = parse_commit($hash_base)
6636                 or die_error(404, "Commit not found");
6637         my $ftype = "blob";
6638         if (!defined $hash) {
6639                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6640                         or die_error(404, "Error looking up file");
6641         } else {
6642                 $ftype = git_get_type($hash);
6643                 if ($ftype !~ "blob") {
6644                         die_error(400, "Object is not a blob");
6645                 }
6646         }
6647
6648         my $fd;
6649         if ($format eq 'incremental') {
6650                 # get file contents (as base)
6651                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6652                         or die_error(500, "Open git-cat-file failed");
6653         } elsif ($format eq 'data') {
6654                 # run git-blame --incremental
6655                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6656                         $hash_base, "--", $file_name
6657                         or die_error(500, "Open git-blame --incremental failed");
6658         } else {
6659                 # run git-blame --porcelain
6660                 open $fd, "-|", git_cmd(), "blame", '-p',
6661                         $hash_base, '--', $file_name
6662                         or die_error(500, "Open git-blame --porcelain failed");
6663         }
6664
6665         # incremental blame data returns early
6666         if ($format eq 'data') {
6667                 print $cgi->header(
6668                         -type=>"text/plain", -charset => "utf-8",
6669                         -status=> "200 OK");
6670                 local $| = 1; # output autoflush
6671                 while (my $line = <$fd>) {
6672                         print to_utf8($line);
6673                 }
6674                 close $fd
6675                         or print "ERROR $!\n";
6676
6677                 print 'END';
6678                 if (defined $t0 && gitweb_check_feature('timed')) {
6679                         print ' '.
6680                               tv_interval($t0, [ gettimeofday() ]).
6681                               ' '.$number_of_git_cmds;
6682                 }
6683                 print "\n";
6684
6685                 return;
6686         }
6687
6688         # page header
6689         git_header_html();
6690         my $formats_nav =
6691                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6692                         "blob") .
6693                 " | ";
6694         if ($format eq 'incremental') {
6695                 $formats_nav .=
6696                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6697                                 "blame") . " (non-incremental)";
6698         } else {
6699                 $formats_nav .=
6700                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6701                                 "blame") . " (incremental)";
6702         }
6703         $formats_nav .=
6704                 " | " .
6705                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6706                         "history") .
6707                 " | " .
6708                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6709                         "HEAD");
6710         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6711         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6712         git_print_page_path($file_name, $ftype, $hash_base);
6713
6714         # page body
6715         if ($format eq 'incremental') {
6716                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6717                       "This page requires JavaScript to run.\n Use ".
6718                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6719                               'this page').
6720                       " instead.\n".
6721                       "</b></center></div>\n</noscript>\n";
6722
6723                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6724         }
6725
6726         print qq!<div class="page_body">\n!;
6727         print qq!<div id="progress_info">... / ...</div>\n!
6728                 if ($format eq 'incremental');
6729         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6730               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6731               qq!<thead>\n!.
6732               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6733               qq!</thead>\n!.
6734               qq!<tbody>\n!;
6735
6736         my @rev_color = qw(light dark);
6737         my $num_colors = scalar(@rev_color);
6738         my $current_color = 0;
6739
6740         if ($format eq 'incremental') {
6741                 my $color_class = $rev_color[$current_color];
6742
6743                 #contents of a file
6744                 my $linenr = 0;
6745         LINE:
6746                 while (my $line = <$fd>) {
6747                         chomp $line;
6748                         $linenr++;
6749
6750                         print qq!<tr id="l$linenr" class="$color_class">!.
6751                               qq!<td class="sha1"><a href=""> </a></td>!.
6752                               qq!<td class="linenr">!.
6753                               qq!<a class="linenr" href="">$linenr</a></td>!;
6754                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6755                         print qq!</tr>\n!;
6756                 }
6757
6758         } else { # porcelain, i.e. ordinary blame
6759                 my %metainfo = (); # saves information about commits
6760
6761                 # blame data
6762         LINE:
6763                 while (my $line = <$fd>) {
6764                         chomp $line;
6765                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6766                         # no <lines in group> for subsequent lines in group of lines
6767                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6768                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6769                         if (!exists $metainfo{$full_rev}) {
6770                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6771                         }
6772                         my $meta = $metainfo{$full_rev};
6773                         my $data;
6774                         while ($data = <$fd>) {
6775                                 chomp $data;
6776                                 last if ($data =~ s/^\t//); # contents of line
6777                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6778                                         $meta->{$1} = $2 unless exists $meta->{$1};
6779                                 }
6780                                 if ($data =~ /^previous /) {
6781                                         $meta->{'nprevious'}++;
6782                                 }
6783                         }
6784                         my $short_rev = substr($full_rev, 0, 8);
6785                         my $author = $meta->{'author'};
6786                         my %date =
6787                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6788                         my $date = $date{'iso-tz'};
6789                         if ($group_size) {
6790                                 $current_color = ($current_color + 1) % $num_colors;
6791                         }
6792                         my $tr_class = $rev_color[$current_color];
6793                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6794                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6795                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6796                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6797                         if ($group_size) {
6798                                 print "<td class=\"sha1\"";
6799                                 print " title=\"". esc_html($author) . ", $date\"";
6800                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6801                                 print ">";
6802                                 print $cgi->a({-href => href(action=>"commit",
6803                                                              hash=>$full_rev,
6804                                                              file_name=>$file_name)},
6805                                               esc_html($short_rev));
6806                                 if ($group_size >= 2) {
6807                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6808                                         if (@author_initials) {
6809                                                 print "<br />" .
6810                                                       esc_html(join('', @author_initials));
6811                                                 #           or join('.', ...)
6812                                         }
6813                                 }
6814                                 print "</td>\n";
6815                         }
6816                         # 'previous' <sha1 of parent commit> <filename at commit>
6817                         if (exists $meta->{'previous'} &&
6818                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6819                                 $meta->{'parent'} = $1;
6820                                 $meta->{'file_parent'} = unquote($2);
6821                         }
6822                         my $linenr_commit =
6823                                 exists($meta->{'parent'}) ?
6824                                 $meta->{'parent'} : $full_rev;
6825                         my $linenr_filename =
6826                                 exists($meta->{'file_parent'}) ?
6827                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6828                         my $blamed = href(action => 'blame',
6829                                           file_name => $linenr_filename,
6830                                           hash_base => $linenr_commit);
6831                         print "<td class=\"linenr\">";
6832                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6833                                         -class => "linenr" },
6834                                       esc_html($lineno));
6835                         print "</td>";
6836                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6837                         print "</tr>\n";
6838                 } # end while
6839
6840         }
6841
6842         # footer
6843         print "</tbody>\n".
6844               "</table>\n"; # class="blame"
6845         print "</div>\n";   # class="blame_body"
6846         close $fd
6847                 or print "Reading blob failed\n";
6848
6849         git_footer_html();
6850 }
6851
6852 sub git_blame {
6853         git_blame_common();
6854 }
6855
6856 sub git_blame_incremental {
6857         git_blame_common('incremental');
6858 }
6859
6860 sub git_blame_data {
6861         git_blame_common('data');
6862 }
6863
6864 sub git_tags {
6865         my $head = git_get_head_hash($project);
6866         git_header_html();
6867         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6868         git_print_header_div('summary', $project);
6869
6870         my @tagslist = git_get_tags_list();
6871         if (@tagslist) {
6872                 git_tags_body(\@tagslist);
6873         }
6874         git_footer_html();
6875 }
6876
6877 sub git_heads {
6878         my $head = git_get_head_hash($project);
6879         git_header_html();
6880         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6881         git_print_header_div('summary', $project);
6882
6883         my @headslist = git_get_heads_list();
6884         if (@headslist) {
6885                 git_heads_body(\@headslist, $head);
6886         }
6887         git_footer_html();
6888 }
6889
6890 # used both for single remote view and for list of all the remotes
6891 sub git_remotes {
6892         gitweb_check_feature('remote_heads')
6893                 or die_error(403, "Remote heads view is disabled");
6894
6895         my $head = git_get_head_hash($project);
6896         my $remote = $input_params{'hash'};
6897
6898         my $remotedata = git_get_remotes_list($remote);
6899         die_error(500, "Unable to get remote information") unless defined $remotedata;
6900
6901         unless (%$remotedata) {
6902                 die_error(404, defined $remote ?
6903                         "Remote $remote not found" :
6904                         "No remotes found");
6905         }
6906
6907         git_header_html(undef, undef, -action_extra => $remote);
6908         git_print_page_nav('', '',  $head, undef, $head,
6909                 format_ref_views($remote ? '' : 'remotes'));
6910
6911         fill_remote_heads($remotedata);
6912         if (defined $remote) {
6913                 git_print_header_div('remotes', "$remote remote for $project");
6914                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6915         } else {
6916                 git_print_header_div('summary', "$project remotes");
6917                 git_remotes_body($remotedata, undef, $head);
6918         }
6919
6920         git_footer_html();
6921 }
6922
6923 sub git_blob_plain {
6924         my $type = shift;
6925         my $expires;
6926
6927         if (!defined $hash) {
6928                 if (defined $file_name) {
6929                         my $base = $hash_base || git_get_head_hash($project);
6930                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6931                                 or die_error(404, "Cannot find file");
6932                 } else {
6933                         die_error(400, "No file name defined");
6934                 }
6935         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6936                 # blobs defined by non-textual hash id's can be cached
6937                 $expires = "+1d";
6938         }
6939
6940         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6941                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6942
6943         # content-type (can include charset)
6944         $type = blob_contenttype($fd, $file_name, $type);
6945
6946         # "save as" filename, even when no $file_name is given
6947         my $save_as = "$hash";
6948         if (defined $file_name) {
6949                 $save_as = $file_name;
6950         } elsif ($type =~ m/^text\//) {
6951                 $save_as .= '.txt';
6952         }
6953
6954         # With XSS prevention on, blobs of all types except a few known safe
6955         # ones are served with "Content-Disposition: attachment" to make sure
6956         # they don't run in our security domain.  For certain image types,
6957         # blob view writes an <img> tag referring to blob_plain view, and we
6958         # want to be sure not to break that by serving the image as an
6959         # attachment (though Firefox 3 doesn't seem to care).
6960         my $sandbox = $prevent_xss &&
6961                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6962
6963         # serve text/* as text/plain
6964         if ($prevent_xss &&
6965             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6966              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6967                 my $rest = $1;
6968                 $rest = defined $rest ? $rest : '';
6969                 $type = "text/plain$rest";
6970         }
6971
6972         print $cgi->header(
6973                 -type => $type,
6974                 -expires => $expires,
6975                 -content_disposition =>
6976                         ($sandbox ? 'attachment' : 'inline')
6977                         . '; filename="' . $save_as . '"');
6978         local $/ = undef;
6979         binmode STDOUT, ':raw';
6980         print <$fd>;
6981         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6982         close $fd;
6983 }
6984
6985 sub git_blob {
6986         my $expires;
6987
6988         if (!defined $hash) {
6989                 if (defined $file_name) {
6990                         my $base = $hash_base || git_get_head_hash($project);
6991                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6992                                 or die_error(404, "Cannot find file");
6993                 } else {
6994                         die_error(400, "No file name defined");
6995                 }
6996         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6997                 # blobs defined by non-textual hash id's can be cached
6998                 $expires = "+1d";
6999         }
7000
7001         my $have_blame = gitweb_check_feature('blame');
7002         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7003                 or die_error(500, "Couldn't cat $file_name, $hash");
7004         my $mimetype = blob_mimetype($fd, $file_name);
7005         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7006         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7007                 close $fd;
7008                 return git_blob_plain($mimetype);
7009         }
7010         # we can have blame only for text/* mimetype
7011         $have_blame &&= ($mimetype =~ m!^text/!);
7012
7013         my $highlight = gitweb_check_feature('highlight');
7014         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7015         $fd = run_highlighter($fd, $highlight, $syntax)
7016                 if $syntax;
7017
7018         git_header_html(undef, $expires);
7019         my $formats_nav = '';
7020         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7021                 if (defined $file_name) {
7022                         if ($have_blame) {
7023                                 $formats_nav .=
7024                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7025                                                 "blame") .
7026                                         " | ";
7027                         }
7028                         $formats_nav .=
7029                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7030                                         "history") .
7031                                 " | " .
7032                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7033                                         "raw") .
7034                                 " | " .
7035                                 $cgi->a({-href => href(action=>"blob",
7036                                                        hash_base=>"HEAD", file_name=>$file_name)},
7037                                         "HEAD");
7038                 } else {
7039                         $formats_nav .=
7040                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7041                                         "raw");
7042                 }
7043                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7044                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7045         } else {
7046                 print "<div class=\"page_nav\">\n" .
7047                       "<br/><br/></div>\n" .
7048                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7049         }
7050         git_print_page_path($file_name, "blob", $hash_base);
7051         print "<div class=\"page_body\">\n";
7052         if ($mimetype =~ m!^image/!) {
7053                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7054                 if ($file_name) {
7055                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7056                 }
7057                 print qq! src="! .
7058                       href(action=>"blob_plain", hash=>$hash,
7059                            hash_base=>$hash_base, file_name=>$file_name) .
7060                       qq!" />\n!;
7061         } else {
7062                 my $nr;
7063                 while (my $line = <$fd>) {
7064                         chomp $line;
7065                         $nr++;
7066                         $line = untabify($line);
7067                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7068                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7069                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7070                 }
7071         }
7072         close $fd
7073                 or print "Reading blob failed.\n";
7074         print "</div>";
7075         git_footer_html();
7076 }
7077
7078 sub git_tree {
7079         if (!defined $hash_base) {
7080                 $hash_base = "HEAD";
7081         }
7082         if (!defined $hash) {
7083                 if (defined $file_name) {
7084                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7085                 } else {
7086                         $hash = $hash_base;
7087                 }
7088         }
7089         die_error(404, "No such tree") unless defined($hash);
7090
7091         my $show_sizes = gitweb_check_feature('show-sizes');
7092         my $have_blame = gitweb_check_feature('blame');
7093
7094         my @entries = ();
7095         {
7096                 local $/ = "\0";
7097                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7098                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7099                         or die_error(500, "Open git-ls-tree failed");
7100                 @entries = map { chomp; $_ } <$fd>;
7101                 close $fd
7102                         or die_error(404, "Reading tree failed");
7103         }
7104
7105         my $refs = git_get_references();
7106         my $ref = format_ref_marker($refs, $hash_base);
7107         git_header_html();
7108         my $basedir = '';
7109         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7110                 my @views_nav = ();
7111                 if (defined $file_name) {
7112                         push @views_nav,
7113                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7114                                         "history"),
7115                                 $cgi->a({-href => href(action=>"tree",
7116                                                        hash_base=>"HEAD", file_name=>$file_name)},
7117                                         "HEAD"),
7118                 }
7119                 my $snapshot_links = format_snapshot_links($hash);
7120                 if (defined $snapshot_links) {
7121                         # FIXME: Should be available when we have no hash base as well.
7122                         push @views_nav, $snapshot_links;
7123                 }
7124                 git_print_page_nav('tree','', $hash_base, undef, undef,
7125                                    join(' | ', @views_nav));
7126                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7127         } else {
7128                 undef $hash_base;
7129                 print "<div class=\"page_nav\">\n";
7130                 print "<br/><br/></div>\n";
7131                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7132         }
7133         if (defined $file_name) {
7134                 $basedir = $file_name;
7135                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7136                         $basedir .= '/';
7137                 }
7138                 git_print_page_path($file_name, 'tree', $hash_base);
7139         }
7140         print "<div class=\"page_body\">\n";
7141         print "<table class=\"tree\">\n";
7142         my $alternate = 1;
7143         # '..' (top directory) link if possible
7144         if (defined $hash_base &&
7145             defined $file_name && $file_name =~ m![^/]+$!) {
7146                 if ($alternate) {
7147                         print "<tr class=\"dark\">\n";
7148                 } else {
7149                         print "<tr class=\"light\">\n";
7150                 }
7151                 $alternate ^= 1;
7152
7153                 my $up = $file_name;
7154                 $up =~ s!/?[^/]+$!!;
7155                 undef $up unless $up;
7156                 # based on git_print_tree_entry
7157                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7158                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7159                 print '<td class="list">';
7160                 print $cgi->a({-href => href(action=>"tree",
7161                                              hash_base=>$hash_base,
7162                                              file_name=>$up)},
7163                               "..");
7164                 print "</td>\n";
7165                 print "<td class=\"link\"></td>\n";
7166
7167                 print "</tr>\n";
7168         }
7169         foreach my $line (@entries) {
7170                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7171
7172                 if ($alternate) {
7173                         print "<tr class=\"dark\">\n";
7174                 } else {
7175                         print "<tr class=\"light\">\n";
7176                 }
7177                 $alternate ^= 1;
7178
7179                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7180
7181                 print "</tr>\n";
7182         }
7183         print "</table>\n" .
7184               "</div>";
7185         git_footer_html();
7186 }
7187
7188 sub snapshot_name {
7189         my ($project, $hash) = @_;
7190
7191         # path/to/project.git  -> project
7192         # path/to/project/.git -> project
7193         my $name = to_utf8($project);
7194         $name =~ s,([^/])/*\.git$,$1,;
7195         $name = basename($name);
7196         # sanitize name
7197         $name =~ s/[[:cntrl:]]/?/g;
7198
7199         my $ver = $hash;
7200         if ($hash =~ /^[0-9a-fA-F]+$/) {
7201                 # shorten SHA-1 hash
7202                 my $full_hash = git_get_full_hash($project, $hash);
7203                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7204                         $ver = git_get_short_hash($project, $hash);
7205                 }
7206         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7207                 # tags don't need shortened SHA-1 hash
7208                 $ver = $1;
7209         } else {
7210                 # branches and other need shortened SHA-1 hash
7211                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7212                         $ver = $1;
7213                 }
7214                 $ver .= '-' . git_get_short_hash($project, $hash);
7215         }
7216         # in case of hierarchical branch names
7217         $ver =~ s!/!.!g;
7218
7219         # name = project-version_string
7220         $name = "$name-$ver";
7221
7222         return wantarray ? ($name, $name) : $name;
7223 }
7224
7225 sub exit_if_unmodified_since {
7226         my ($latest_epoch) = @_;
7227         our $cgi;
7228
7229         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7230         if (defined $if_modified) {
7231                 my $since;
7232                 if (eval { require HTTP::Date; 1; }) {
7233                         $since = HTTP::Date::str2time($if_modified);
7234                 } elsif (eval { require Time::ParseDate; 1; }) {
7235                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7236                 }
7237                 if (defined $since && $latest_epoch <= $since) {
7238                         my %latest_date = parse_date($latest_epoch);
7239                         print $cgi->header(
7240                                 -last_modified => $latest_date{'rfc2822'},
7241                                 -status => '304 Not Modified');
7242                         goto DONE_GITWEB;
7243                 }
7244         }
7245 }
7246
7247 sub git_snapshot {
7248         my $format = $input_params{'snapshot_format'};
7249         if (!@snapshot_fmts) {
7250                 die_error(403, "Snapshots not allowed");
7251         }
7252         # default to first supported snapshot format
7253         $format ||= $snapshot_fmts[0];
7254         if ($format !~ m/^[a-z0-9]+$/) {
7255                 die_error(400, "Invalid snapshot format parameter");
7256         } elsif (!exists($known_snapshot_formats{$format})) {
7257                 die_error(400, "Unknown snapshot format");
7258         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7259                 die_error(403, "Snapshot format not allowed");
7260         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7261                 die_error(403, "Unsupported snapshot format");
7262         }
7263
7264         my $type = git_get_type("$hash^{}");
7265         if (!$type) {
7266                 die_error(404, 'Object does not exist');
7267         }  elsif ($type eq 'blob') {
7268                 die_error(400, 'Object is not a tree-ish');
7269         }
7270
7271         my ($name, $prefix) = snapshot_name($project, $hash);
7272         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7273
7274         my %co = parse_commit($hash);
7275         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7276
7277         my $cmd = quote_command(
7278                 git_cmd(), 'archive',
7279                 "--format=$known_snapshot_formats{$format}{'format'}",
7280                 "--prefix=$prefix/", $hash);
7281         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7282                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7283         }
7284
7285         $filename =~ s/(["\\])/\\$1/g;
7286         my %latest_date;
7287         if (%co) {
7288                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7289         }
7290
7291         print $cgi->header(
7292                 -type => $known_snapshot_formats{$format}{'type'},
7293                 -content_disposition => 'inline; filename="' . $filename . '"',
7294                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7295                 -status => '200 OK');
7296
7297         open my $fd, "-|", $cmd
7298                 or die_error(500, "Execute git-archive failed");
7299         binmode STDOUT, ':raw';
7300         print <$fd>;
7301         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7302         close $fd;
7303 }
7304
7305 sub git_log_generic {
7306         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7307
7308         my $head = git_get_head_hash($project);
7309         my $allrefs;
7310         if (!defined $base) {
7311                 $base = $head;
7312                 $allrefs = 1;
7313         }
7314         if (!defined $page) {
7315                 $page = 0;
7316         }
7317         my $refs = git_get_references();
7318
7319         my $commit_hash = $base;
7320         if (defined $allrefs) {
7321                 $commit_hash = "--all";
7322         }
7323         if (defined $parent) {
7324                 $commit_hash = "$parent..$base";
7325         }
7326         my @commitlist =
7327                 parse_commits($commit_hash, 101, (100 * $page),
7328                               defined $file_name ? ($file_name, "--full-history") : ());
7329
7330         my $ftype;
7331         if (!defined $file_hash && defined $file_name) {
7332                 # some commits could have deleted file in question,
7333                 # and not have it in tree, but one of them has to have it
7334                 for (my $i = 0; $i < @commitlist; $i++) {
7335                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7336                         last if defined $file_hash;
7337                 }
7338         }
7339         if (defined $file_hash) {
7340                 $ftype = git_get_type($file_hash);
7341         }
7342         if (defined $file_name && !defined $ftype) {
7343                 die_error(500, "Unknown type of object");
7344         }
7345         my %co;
7346         if (defined $file_name) {
7347                 %co = parse_commit($base)
7348                         or die_error(404, "Unknown commit object");
7349         }
7350
7351
7352         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7353         my $next_link = '';
7354         if ($#commitlist >= 100) {
7355                 $next_link =
7356                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7357                                  -accesskey => "n", -title => "Alt-n"}, "next");
7358         }
7359         my $patch_max = gitweb_get_feature('patches');
7360         if ($patch_max && !defined $file_name) {
7361                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7362                         $paging_nav .= " &sdot; " .
7363                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7364                                         "patches");
7365                 }
7366         }
7367
7368         git_header_html();
7369         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7370         if (defined $file_name) {
7371                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7372         } else {
7373                 git_print_header_div('summary', $project)
7374         }
7375         git_print_page_path($file_name, $ftype, $hash_base)
7376                 if (defined $file_name);
7377
7378         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7379                      $file_name, $file_hash, $ftype, $allrefs);
7380
7381         git_footer_html();
7382 }
7383
7384 sub git_log {
7385         git_log_generic('log', \&git_log_body,
7386                         $hash, $hash_parent);
7387 }
7388
7389 sub git_commit {
7390         $hash ||= $hash_base || "HEAD";
7391         my %co = parse_commit($hash)
7392             or die_error(404, "Unknown commit object");
7393
7394         my $parent  = $co{'parent'};
7395         my $parents = $co{'parents'}; # listref
7396
7397         # we need to prepare $formats_nav before any parameter munging
7398         my $formats_nav;
7399         if (!defined $parent) {
7400                 # --root commitdiff
7401                 $formats_nav .= '(initial)';
7402         } elsif (@$parents == 1) {
7403                 # single parent commit
7404                 $formats_nav .=
7405                         '(parent: ' .
7406                         $cgi->a({-href => href(action=>"commit",
7407                                                hash=>$parent)},
7408                                 esc_html(substr($parent, 0, 7))) .
7409                         ')';
7410         } else {
7411                 # merge commit
7412                 $formats_nav .=
7413                         '(merge: ' .
7414                         join(' ', map {
7415                                 $cgi->a({-href => href(action=>"commit",
7416                                                        hash=>$_)},
7417                                         esc_html(substr($_, 0, 7)));
7418                         } @$parents ) .
7419                         ')';
7420         }
7421         if (gitweb_check_feature('patches') && @$parents <= 1) {
7422                 $formats_nav .= " | " .
7423                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7424                                 "patch");
7425         }
7426
7427         if (!defined $parent) {
7428                 $parent = "--root";
7429         }
7430         my @difftree;
7431         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7432                 @diff_opts,
7433                 (@$parents <= 1 ? $parent : '-c'),
7434                 $hash, "--"
7435                 or die_error(500, "Open git-diff-tree failed");
7436         @difftree = map { chomp; $_ } <$fd>;
7437         close $fd or die_error(404, "Reading git-diff-tree failed");
7438
7439         # non-textual hash id's can be cached
7440         my $expires;
7441         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7442                 $expires = "+1d";
7443         }
7444         my $refs = git_get_references();
7445         my $ref = format_ref_marker($refs, $co{'id'});
7446
7447         git_header_html(undef, $expires);
7448         git_print_page_nav('commit', '',
7449                            $hash, $co{'tree'}, $hash,
7450                            $formats_nav);
7451
7452         if (defined $co{'parent'}) {
7453                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7454         } else {
7455                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7456         }
7457         print "<div class=\"title_text\">\n" .
7458               "<table class=\"object_header\">\n";
7459         git_print_authorship_rows(\%co);
7460         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7461         print "<tr>" .
7462               "<td>tree</td>" .
7463               "<td class=\"sha1\">" .
7464               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7465                        class => "list"}, $co{'tree'}) .
7466               "</td>" .
7467               "<td class=\"link\">" .
7468               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7469                       "tree");
7470         my $snapshot_links = format_snapshot_links($hash);
7471         if (defined $snapshot_links) {
7472                 print " | " . $snapshot_links;
7473         }
7474         print "</td>" .
7475               "</tr>\n";
7476
7477         foreach my $par (@$parents) {
7478                 print "<tr>" .
7479                       "<td>parent</td>" .
7480                       "<td class=\"sha1\">" .
7481                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7482                                class => "list"}, $par) .
7483                       "</td>" .
7484                       "<td class=\"link\">" .
7485                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7486                       " | " .
7487                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7488                       "</td>" .
7489                       "</tr>\n";
7490         }
7491         print "</table>".
7492               "</div>\n";
7493
7494         print "<div class=\"page_body\">\n";
7495         git_print_log($co{'comment'});
7496         print "</div>\n";
7497
7498         git_difftree_body(\@difftree, $hash, @$parents);
7499
7500         git_footer_html();
7501 }
7502
7503 sub git_object {
7504         # object is defined by:
7505         # - hash or hash_base alone
7506         # - hash_base and file_name
7507         my $type;
7508
7509         # - hash or hash_base alone
7510         if ($hash || ($hash_base && !defined $file_name)) {
7511                 my $object_id = $hash || $hash_base;
7512
7513                 open my $fd, "-|", quote_command(
7514                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7515                         or die_error(404, "Object does not exist");
7516                 $type = <$fd>;
7517                 chomp $type;
7518                 close $fd
7519                         or die_error(404, "Object does not exist");
7520
7521         # - hash_base and file_name
7522         } elsif ($hash_base && defined $file_name) {
7523                 $file_name =~ s,/+$,,;
7524
7525                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7526                         or die_error(404, "Base object does not exist");
7527
7528                 # here errors should not hapen
7529                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7530                         or die_error(500, "Open git-ls-tree failed");
7531                 my $line = <$fd>;
7532                 close $fd;
7533
7534                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7535                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7536                         die_error(404, "File or directory for given base does not exist");
7537                 }
7538                 $type = $2;
7539                 $hash = $3;
7540         } else {
7541                 die_error(400, "Not enough information to find object");
7542         }
7543
7544         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7545                                           hash=>$hash, hash_base=>$hash_base,
7546                                           file_name=>$file_name),
7547                              -status => '302 Found');
7548 }
7549
7550 sub git_blobdiff {
7551         my $format = shift || 'html';
7552         my $diff_style = $input_params{'diff_style'} || 'inline';
7553
7554         my $fd;
7555         my @difftree;
7556         my %diffinfo;
7557         my $expires;
7558
7559         # preparing $fd and %diffinfo for git_patchset_body
7560         # new style URI
7561         if (defined $hash_base && defined $hash_parent_base) {
7562                 if (defined $file_name) {
7563                         # read raw output
7564                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7565                                 $hash_parent_base, $hash_base,
7566                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7567                                 or die_error(500, "Open git-diff-tree failed");
7568                         @difftree = map { chomp; $_ } <$fd>;
7569                         close $fd
7570                                 or die_error(404, "Reading git-diff-tree failed");
7571                         @difftree
7572                                 or die_error(404, "Blob diff not found");
7573
7574                 } elsif (defined $hash &&
7575                          $hash =~ /[0-9a-fA-F]{40}/) {
7576                         # try to find filename from $hash
7577
7578                         # read filtered raw output
7579                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7580                                 $hash_parent_base, $hash_base, "--"
7581                                 or die_error(500, "Open git-diff-tree failed");
7582                         @difftree =
7583                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7584                                 # $hash == to_id
7585                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7586                                 map { chomp; $_ } <$fd>;
7587                         close $fd
7588                                 or die_error(404, "Reading git-diff-tree failed");
7589                         @difftree
7590                                 or die_error(404, "Blob diff not found");
7591
7592                 } else {
7593                         die_error(400, "Missing one of the blob diff parameters");
7594                 }
7595
7596                 if (@difftree > 1) {
7597                         die_error(400, "Ambiguous blob diff specification");
7598                 }
7599
7600                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7601                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7602                 $file_name   ||= $diffinfo{'to_file'};
7603
7604                 $hash_parent ||= $diffinfo{'from_id'};
7605                 $hash        ||= $diffinfo{'to_id'};
7606
7607                 # non-textual hash id's can be cached
7608                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7609                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7610                         $expires = '+1d';
7611                 }
7612
7613                 # open patch output
7614                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7615                         '-p', ($format eq 'html' ? "--full-index" : ()),
7616                         $hash_parent_base, $hash_base,
7617                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7618                         or die_error(500, "Open git-diff-tree failed");
7619         }
7620
7621         # old/legacy style URI -- not generated anymore since 1.4.3.
7622         if (!%diffinfo) {
7623                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7624         }
7625
7626         # header
7627         if ($format eq 'html') {
7628                 my $formats_nav =
7629                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7630                                 "raw");
7631                 $formats_nav .= diff_style_nav($diff_style);
7632                 git_header_html(undef, $expires);
7633                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7634                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7635                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7636                 } else {
7637                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7638                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7639                 }
7640                 if (defined $file_name) {
7641                         git_print_page_path($file_name, "blob", $hash_base);
7642                 } else {
7643                         print "<div class=\"page_path\"></div>\n";
7644                 }
7645
7646         } elsif ($format eq 'plain') {
7647                 print $cgi->header(
7648                         -type => 'text/plain',
7649                         -charset => 'utf-8',
7650                         -expires => $expires,
7651                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7652
7653                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7654
7655         } else {
7656                 die_error(400, "Unknown blobdiff format");
7657         }
7658
7659         # patch
7660         if ($format eq 'html') {
7661                 print "<div class=\"page_body\">\n";
7662
7663                 git_patchset_body($fd, $diff_style,
7664                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7665                 close $fd;
7666
7667                 print "</div>\n"; # class="page_body"
7668                 git_footer_html();
7669
7670         } else {
7671                 while (my $line = <$fd>) {
7672                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7673                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7674
7675                         print $line;
7676
7677                         last if $line =~ m!^\+\+\+!;
7678                 }
7679                 local $/ = undef;
7680                 print <$fd>;
7681                 close $fd;
7682         }
7683 }
7684
7685 sub git_blobdiff_plain {
7686         git_blobdiff('plain');
7687 }
7688
7689 # assumes that it is added as later part of already existing navigation,
7690 # so it returns "| foo | bar" rather than just "foo | bar"
7691 sub diff_style_nav {
7692         my ($diff_style, $is_combined) = @_;
7693         $diff_style ||= 'inline';
7694
7695         return "" if ($is_combined);
7696
7697         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7698         my %styles = @styles;
7699         @styles =
7700                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7701
7702         return join '',
7703                 map { " | ".$_ }
7704                 map {
7705                         $_ eq $diff_style ? $styles{$_} :
7706                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7707                 } @styles;
7708 }
7709
7710 sub git_commitdiff {
7711         my %params = @_;
7712         my $format = $params{-format} || 'html';
7713         my $diff_style = $input_params{'diff_style'} || 'inline';
7714
7715         my ($patch_max) = gitweb_get_feature('patches');
7716         if ($format eq 'patch') {
7717                 die_error(403, "Patch view not allowed") unless $patch_max;
7718         }
7719
7720         $hash ||= $hash_base || "HEAD";
7721         my %co = parse_commit($hash)
7722             or die_error(404, "Unknown commit object");
7723
7724         # choose format for commitdiff for merge
7725         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7726                 $hash_parent = '--cc';
7727         }
7728         # we need to prepare $formats_nav before almost any parameter munging
7729         my $formats_nav;
7730         if ($format eq 'html') {
7731                 $formats_nav =
7732                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7733                                 "raw");
7734                 if ($patch_max && @{$co{'parents'}} <= 1) {
7735                         $formats_nav .= " | " .
7736                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7737                                         "patch");
7738                 }
7739                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7740
7741                 if (defined $hash_parent &&
7742                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7743                         # commitdiff with two commits given
7744                         my $hash_parent_short = $hash_parent;
7745                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7746                                 $hash_parent_short = substr($hash_parent, 0, 7);
7747                         }
7748                         $formats_nav .=
7749                                 ' (from';
7750                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7751                                 if ($co{'parents'}[$i] eq $hash_parent) {
7752                                         $formats_nav .= ' parent ' . ($i+1);
7753                                         last;
7754                                 }
7755                         }
7756                         $formats_nav .= ': ' .
7757                                 $cgi->a({-href => href(-replay=>1,
7758                                                        hash=>$hash_parent, hash_base=>undef)},
7759                                         esc_html($hash_parent_short)) .
7760                                 ')';
7761                 } elsif (!$co{'parent'}) {
7762                         # --root commitdiff
7763                         $formats_nav .= ' (initial)';
7764                 } elsif (scalar @{$co{'parents'}} == 1) {
7765                         # single parent commit
7766                         $formats_nav .=
7767                                 ' (parent: ' .
7768                                 $cgi->a({-href => href(-replay=>1,
7769                                                        hash=>$co{'parent'}, hash_base=>undef)},
7770                                         esc_html(substr($co{'parent'}, 0, 7))) .
7771                                 ')';
7772                 } else {
7773                         # merge commit
7774                         if ($hash_parent eq '--cc') {
7775                                 $formats_nav .= ' | ' .
7776                                         $cgi->a({-href => href(-replay=>1,
7777                                                                hash=>$hash, hash_parent=>'-c')},
7778                                                 'combined');
7779                         } else { # $hash_parent eq '-c'
7780                                 $formats_nav .= ' | ' .
7781                                         $cgi->a({-href => href(-replay=>1,
7782                                                                hash=>$hash, hash_parent=>'--cc')},
7783                                                 'compact');
7784                         }
7785                         $formats_nav .=
7786                                 ' (merge: ' .
7787                                 join(' ', map {
7788                                         $cgi->a({-href => href(-replay=>1,
7789                                                                hash=>$_, hash_base=>undef)},
7790                                                 esc_html(substr($_, 0, 7)));
7791                                 } @{$co{'parents'}} ) .
7792                                 ')';
7793                 }
7794         }
7795
7796         my $hash_parent_param = $hash_parent;
7797         if (!defined $hash_parent_param) {
7798                 # --cc for multiple parents, --root for parentless
7799                 $hash_parent_param =
7800                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7801         }
7802
7803         # read commitdiff
7804         my $fd;
7805         my @difftree;
7806         if ($format eq 'html') {
7807                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7808                         "--no-commit-id", "--patch-with-raw", "--full-index",
7809                         $hash_parent_param, $hash, "--"
7810                         or die_error(500, "Open git-diff-tree failed");
7811
7812                 while (my $line = <$fd>) {
7813                         chomp $line;
7814                         # empty line ends raw part of diff-tree output
7815                         last unless $line;
7816                         push @difftree, scalar parse_difftree_raw_line($line);
7817                 }
7818
7819         } elsif ($format eq 'plain') {
7820                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7821                         '-p', $hash_parent_param, $hash, "--"
7822                         or die_error(500, "Open git-diff-tree failed");
7823         } elsif ($format eq 'patch') {
7824                 # For commit ranges, we limit the output to the number of
7825                 # patches specified in the 'patches' feature.
7826                 # For single commits, we limit the output to a single patch,
7827                 # diverging from the git-format-patch default.
7828                 my @commit_spec = ();
7829                 if ($hash_parent) {
7830                         if ($patch_max > 0) {
7831                                 push @commit_spec, "-$patch_max";
7832                         }
7833                         push @commit_spec, '-n', "$hash_parent..$hash";
7834                 } else {
7835                         if ($params{-single}) {
7836                                 push @commit_spec, '-1';
7837                         } else {
7838                                 if ($patch_max > 0) {
7839                                         push @commit_spec, "-$patch_max";
7840                                 }
7841                                 push @commit_spec, "-n";
7842                         }
7843                         push @commit_spec, '--root', $hash;
7844                 }
7845                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7846                         '--encoding=utf8', '--stdout', @commit_spec
7847                         or die_error(500, "Open git-format-patch failed");
7848         } else {
7849                 die_error(400, "Unknown commitdiff format");
7850         }
7851
7852         # non-textual hash id's can be cached
7853         my $expires;
7854         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7855                 $expires = "+1d";
7856         }
7857
7858         # write commit message
7859         if ($format eq 'html') {
7860                 my $refs = git_get_references();
7861                 my $ref = format_ref_marker($refs, $co{'id'});
7862
7863                 git_header_html(undef, $expires);
7864                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7865                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7866                 print "<div class=\"title_text\">\n" .
7867                       "<table class=\"object_header\">\n";
7868                 git_print_authorship_rows(\%co);
7869                 print "</table>".
7870                       "</div>\n";
7871                 print "<div class=\"page_body\">\n";
7872                 if (@{$co{'comment'}} > 1) {
7873                         print "<div class=\"log\">\n";
7874                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7875                         print "</div>\n"; # class="log"
7876                 }
7877
7878         } elsif ($format eq 'plain') {
7879                 my $refs = git_get_references("tags");
7880                 my $tagname = git_get_rev_name_tags($hash);
7881                 my $filename = basename($project) . "-$hash.patch";
7882
7883                 print $cgi->header(
7884                         -type => 'text/plain',
7885                         -charset => 'utf-8',
7886                         -expires => $expires,
7887                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7888                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7889                 print "From: " . to_utf8($co{'author'}) . "\n";
7890                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7891                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7892
7893                 print "X-Git-Tag: $tagname\n" if $tagname;
7894                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7895
7896                 foreach my $line (@{$co{'comment'}}) {
7897                         print to_utf8($line) . "\n";
7898                 }
7899                 print "---\n\n";
7900         } elsif ($format eq 'patch') {
7901                 my $filename = basename($project) . "-$hash.patch";
7902
7903                 print $cgi->header(
7904                         -type => 'text/plain',
7905                         -charset => 'utf-8',
7906                         -expires => $expires,
7907                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7908         }
7909
7910         # write patch
7911         if ($format eq 'html') {
7912                 my $use_parents = !defined $hash_parent ||
7913                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7914                 git_difftree_body(\@difftree, $hash,
7915                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7916                 print "<br/>\n";
7917
7918                 git_patchset_body($fd, $diff_style,
7919                                   \@difftree, $hash,
7920                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7921                 close $fd;
7922                 print "</div>\n"; # class="page_body"
7923                 git_footer_html();
7924
7925         } elsif ($format eq 'plain') {
7926                 local $/ = undef;
7927                 print <$fd>;
7928                 close $fd
7929                         or print "Reading git-diff-tree failed\n";
7930         } elsif ($format eq 'patch') {
7931                 local $/ = undef;
7932                 print <$fd>;
7933                 close $fd
7934                         or print "Reading git-format-patch failed\n";
7935         }
7936 }
7937
7938 sub git_commitdiff_plain {
7939         git_commitdiff(-format => 'plain');
7940 }
7941
7942 # format-patch-style patches
7943 sub git_patch {
7944         git_commitdiff(-format => 'patch', -single => 1);
7945 }
7946
7947 sub git_patches {
7948         git_commitdiff(-format => 'patch');
7949 }
7950
7951 sub git_history {
7952         git_log_generic('history', \&git_history_body,
7953                         $hash_base, $hash_parent_base,
7954                         $file_name, $hash);
7955 }
7956
7957 sub git_search {
7958         $searchtype ||= 'commit';
7959
7960         # check if appropriate features are enabled
7961         gitweb_check_feature('search')
7962                 or die_error(403, "Search is disabled");
7963         if ($searchtype eq 'pickaxe') {
7964                 # pickaxe may take all resources of your box and run for several minutes
7965                 # with every query - so decide by yourself how public you make this feature
7966                 gitweb_check_feature('pickaxe')
7967                         or die_error(403, "Pickaxe search is disabled");
7968         }
7969         if ($searchtype eq 'grep') {
7970                 # grep search might be potentially CPU-intensive, too
7971                 gitweb_check_feature('grep')
7972                         or die_error(403, "Grep search is disabled");
7973         }
7974
7975         if (!defined $searchtext) {
7976                 die_error(400, "Text field is empty");
7977         }
7978         if (!defined $hash) {
7979                 $hash = git_get_head_hash($project);
7980         }
7981         my %co = parse_commit($hash);
7982         if (!%co) {
7983                 die_error(404, "Unknown commit object");
7984         }
7985         if (!defined $page) {
7986                 $page = 0;
7987         }
7988
7989         if ($searchtype eq 'commit' ||
7990             $searchtype eq 'author' ||
7991             $searchtype eq 'committer') {
7992                 git_search_message(%co);
7993         } elsif ($searchtype eq 'pickaxe') {
7994                 git_search_changes(%co);
7995         } elsif ($searchtype eq 'grep') {
7996                 git_search_files(%co);
7997         } else {
7998                 die_error(400, "Unknown search type");
7999         }
8000 }
8001
8002 sub git_search_help {
8003         git_header_html();
8004         git_print_page_nav('','', $hash,$hash,$hash);
8005         print <<EOT;
8006 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8007 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8008 the pattern entered is recognized as the POSIX extended
8009 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8010 insensitive).</p>
8011 <dl>
8012 <dt><b>commit</b></dt>
8013 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8014 EOT
8015         my $have_grep = gitweb_check_feature('grep');
8016         if ($have_grep) {
8017                 print <<EOT;
8018 <dt><b>grep</b></dt>
8019 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8020     a different one) are searched for the given pattern. On large trees, this search can take
8021 a while and put some strain on the server, so please use it with some consideration. Note that
8022 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8023 case-sensitive.</dd>
8024 EOT
8025         }
8026         print <<EOT;
8027 <dt><b>author</b></dt>
8028 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8029 <dt><b>committer</b></dt>
8030 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8031 EOT
8032         my $have_pickaxe = gitweb_check_feature('pickaxe');
8033         if ($have_pickaxe) {
8034                 print <<EOT;
8035 <dt><b>pickaxe</b></dt>
8036 <dd>All commits that caused the string to appear or disappear from any file (changes that
8037 added, removed or "modified" the string) will be listed. This search can take a while and
8038 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8039 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8040 EOT
8041         }
8042         print "</dl>\n";
8043         git_footer_html();
8044 }
8045
8046 sub git_shortlog {
8047         git_log_generic('shortlog', \&git_shortlog_body,
8048                         $hash, $hash_parent);
8049 }
8050
8051 ## ......................................................................
8052 ## feeds (RSS, Atom; OPML)
8053
8054 sub git_feed {
8055         my $format = shift || 'atom';
8056         my $have_blame = gitweb_check_feature('blame');
8057
8058         # Atom: http://www.atomenabled.org/developers/syndication/
8059         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8060         if ($format ne 'rss' && $format ne 'atom') {
8061                 die_error(400, "Unknown web feed format");
8062         }
8063
8064         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8065         my $head = $hash || 'HEAD';
8066         my @commitlist = parse_commits($head, 150, 0, $file_name);
8067
8068         my %latest_commit;
8069         my %latest_date;
8070         my $content_type = "application/$format+xml";
8071         if (defined $cgi->http('HTTP_ACCEPT') &&
8072                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8073                 # browser (feed reader) prefers text/xml
8074                 $content_type = 'text/xml';
8075         }
8076         if (defined($commitlist[0])) {
8077                 %latest_commit = %{$commitlist[0]};
8078                 my $latest_epoch = $latest_commit{'committer_epoch'};
8079                 exit_if_unmodified_since($latest_epoch);
8080                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8081         }
8082         print $cgi->header(
8083                 -type => $content_type,
8084                 -charset => 'utf-8',
8085                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8086                 -status => '200 OK');
8087
8088         # Optimization: skip generating the body if client asks only
8089         # for Last-Modified date.
8090         return if ($cgi->request_method() eq 'HEAD');
8091
8092         # header variables
8093         my $title = "$site_name - $project/$action";
8094         my $feed_type = 'log';
8095         if (defined $hash) {
8096                 $title .= " - '$hash'";
8097                 $feed_type = 'branch log';
8098                 if (defined $file_name) {
8099                         $title .= " :: $file_name";
8100                         $feed_type = 'history';
8101                 }
8102         } elsif (defined $file_name) {
8103                 $title .= " - $file_name";
8104                 $feed_type = 'history';
8105         }
8106         $title .= " $feed_type";
8107         $title = esc_html($title);
8108         my $descr = git_get_project_description($project);
8109         if (defined $descr) {
8110                 $descr = esc_html($descr);
8111         } else {
8112                 $descr = "$project " .
8113                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8114                          " feed";
8115         }
8116         my $owner = git_get_project_owner($project);
8117         $owner = esc_html($owner);
8118
8119         #header
8120         my $alt_url;
8121         if (defined $file_name) {
8122                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8123         } elsif (defined $hash) {
8124                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8125         } else {
8126                 $alt_url = href(-full=>1, action=>"summary");
8127         }
8128         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8129         if ($format eq 'rss') {
8130                 print <<XML;
8131 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8132 <channel>
8133 XML
8134                 print "<title>$title</title>\n" .
8135                       "<link>$alt_url</link>\n" .
8136                       "<description>$descr</description>\n" .
8137                       "<language>en</language>\n" .
8138                       # project owner is responsible for 'editorial' content
8139                       "<managingEditor>$owner</managingEditor>\n";
8140                 if (defined $logo || defined $favicon) {
8141                         # prefer the logo to the favicon, since RSS
8142                         # doesn't allow both
8143                         my $img = esc_url($logo || $favicon);
8144                         print "<image>\n" .
8145                               "<url>$img</url>\n" .
8146                               "<title>$title</title>\n" .
8147                               "<link>$alt_url</link>\n" .
8148                               "</image>\n";
8149                 }
8150                 if (%latest_date) {
8151                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8152                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8153                 }
8154                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8155         } elsif ($format eq 'atom') {
8156                 print <<XML;
8157 <feed xmlns="http://www.w3.org/2005/Atom">
8158 XML
8159                 print "<title>$title</title>\n" .
8160                       "<subtitle>$descr</subtitle>\n" .
8161                       '<link rel="alternate" type="text/html" href="' .
8162                       $alt_url . '" />' . "\n" .
8163                       '<link rel="self" type="' . $content_type . '" href="' .
8164                       $cgi->self_url() . '" />' . "\n" .
8165                       "<id>" . href(-full=>1) . "</id>\n" .
8166                       # use project owner for feed author
8167                       "<author><name>$owner</name></author>\n";
8168                 if (defined $favicon) {
8169                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8170                 }
8171                 if (defined $logo) {
8172                         # not twice as wide as tall: 72 x 27 pixels
8173                         print "<logo>" . esc_url($logo) . "</logo>\n";
8174                 }
8175                 if (! %latest_date) {
8176                         # dummy date to keep the feed valid until commits trickle in:
8177                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8178                 } else {
8179                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8180                 }
8181                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8182         }
8183
8184         # contents
8185         for (my $i = 0; $i <= $#commitlist; $i++) {
8186                 my %co = %{$commitlist[$i]};
8187                 my $commit = $co{'id'};
8188                 # we read 150, we always show 30 and the ones more recent than 48 hours
8189                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8190                         last;
8191                 }
8192                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8193
8194                 # get list of changed files
8195                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8196                         $co{'parent'} || "--root",
8197                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8198                         or next;
8199                 my @difftree = map { chomp; $_ } <$fd>;
8200                 close $fd
8201                         or next;
8202
8203                 # print element (entry, item)
8204                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8205                 if ($format eq 'rss') {
8206                         print "<item>\n" .
8207                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8208                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8209                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8210                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8211                               "<link>$co_url</link>\n" .
8212                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8213                               "<content:encoded>" .
8214                               "<![CDATA[\n";
8215                 } elsif ($format eq 'atom') {
8216                         print "<entry>\n" .
8217                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8218                               "<updated>$cd{'iso-8601'}</updated>\n" .
8219                               "<author>\n" .
8220                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8221                         if ($co{'author_email'}) {
8222                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8223                         }
8224                         print "</author>\n" .
8225                               # use committer for contributor
8226                               "<contributor>\n" .
8227                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8228                         if ($co{'committer_email'}) {
8229                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8230                         }
8231                         print "</contributor>\n" .
8232                               "<published>$cd{'iso-8601'}</published>\n" .
8233                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8234                               "<id>$co_url</id>\n" .
8235                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8236                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8237                 }
8238                 my $comment = $co{'comment'};
8239                 print "<pre>\n";
8240                 foreach my $line (@$comment) {
8241                         $line = esc_html($line);
8242                         print "$line\n";
8243                 }
8244                 print "</pre><ul>\n";
8245                 foreach my $difftree_line (@difftree) {
8246                         my %difftree = parse_difftree_raw_line($difftree_line);
8247                         next if !$difftree{'from_id'};
8248
8249                         my $file = $difftree{'file'} || $difftree{'to_file'};
8250
8251                         print "<li>" .
8252                               "[" .
8253                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8254                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8255                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8256                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8257                                       -title => "diff"}, 'D');
8258                         if ($have_blame) {
8259                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8260                                                              file_name=>$file, hash_base=>$commit),
8261                                               -title => "blame"}, 'B');
8262                         }
8263                         # if this is not a feed of a file history
8264                         if (!defined $file_name || $file_name ne $file) {
8265                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8266                                                              file_name=>$file, hash=>$commit),
8267                                               -title => "history"}, 'H');
8268                         }
8269                         $file = esc_path($file);
8270                         print "] ".
8271                               "$file</li>\n";
8272                 }
8273                 if ($format eq 'rss') {
8274                         print "</ul>]]>\n" .
8275                               "</content:encoded>\n" .
8276                               "</item>\n";
8277                 } elsif ($format eq 'atom') {
8278                         print "</ul>\n</div>\n" .
8279                               "</content>\n" .
8280                               "</entry>\n";
8281                 }
8282         }
8283
8284         # end of feed
8285         if ($format eq 'rss') {
8286                 print "</channel>\n</rss>\n";
8287         } elsif ($format eq 'atom') {
8288                 print "</feed>\n";
8289         }
8290 }
8291
8292 sub git_rss {
8293         git_feed('rss');
8294 }
8295
8296 sub git_atom {
8297         git_feed('atom');
8298 }
8299
8300 sub git_opml {
8301         my @list = git_get_projects_list($project_filter, $strict_export);
8302         if (!@list) {
8303                 die_error(404, "No projects found");
8304         }
8305
8306         print $cgi->header(
8307                 -type => 'text/xml',
8308                 -charset => 'utf-8',
8309                 -content_disposition => 'inline; filename="opml.xml"');
8310
8311         my $title = esc_html($site_name);
8312         my $filter = " within subdirectory ";
8313         if (defined $project_filter) {
8314                 $filter .= esc_html($project_filter);
8315         } else {
8316                 $filter = "";
8317         }
8318         print <<XML;
8319 <?xml version="1.0" encoding="utf-8"?>
8320 <opml version="1.0">
8321 <head>
8322   <title>$title OPML Export$filter</title>
8323 </head>
8324 <body>
8325 <outline text="git RSS feeds">
8326 XML
8327
8328         foreach my $pr (@list) {
8329                 my %proj = %$pr;
8330                 my $head = git_get_head_hash($proj{'path'});
8331                 if (!defined $head) {
8332                         next;
8333                 }
8334                 $git_dir = "$projectroot/$proj{'path'}";
8335                 my %co = parse_commit($head);
8336                 if (!%co) {
8337                         next;
8338                 }
8339
8340                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8341                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8342                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8343                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8344         }
8345         print <<XML;
8346 </outline>
8347 </body>
8348 </opml>
8349 XML
8350 }