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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 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 $version = "++GIT_VERSION++";
  31
  32 our ($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 = "++GIT_BINDIR++/git";
  76
  77 # absolute fs-path which will be prepended to the project path
  78 #our $projectroot = "/pub/scm";
  79 our $projectroot = "++GITWEB_PROJECTROOT++";
  80
  81 # fs traversing limit for getting project list
  82 # the number is relative to the projectroot
  83 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  84
  85 # string of the home link on top of all pages
  86 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  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 $site_name = "++GITWEB_SITENAME++"
  91                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  92
  93 # html snippet to include in the <head> section of each page
  94 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  95 # filename of html text to include at top of each page
  96 our $site_header = "++GITWEB_SITE_HEADER++";
  97 # html text to include at home page
  98 our $home_text = "++GITWEB_HOMETEXT++";
  99 # filename of html text to include at bottom of each page
 100 our $site_footer = "++GITWEB_SITE_FOOTER++";
 101
 102 # URI of stylesheets
 103 our @stylesheets = ("++GITWEB_CSS++");
 104 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 105 our $stylesheet = undef;
 106
 107 # URI of GIT logo (72x27 size)
 108 our $logo = "++GITWEB_LOGO++";
 109 # URI of GIT favicon, assumed to be image/png type
 110 our $favicon = "++GITWEB_FAVICON++";
 111 # URI of gitweb.js (JavaScript code for gitweb)
 112 our $javascript = "++GITWEB_JS++";
 113
 114 # URI and label (title) of GIT logo link
 115 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 116 #our $logo_label = "git documentation";
 117 our $logo_url = "http://git-scm.com/";
 118 our $logo_label = "git homepage";
 119
 120 # source of projects list
 121 our $projects_list = "++GITWEB_LIST++";
 122
 123 # the width (in characters) of the projects list "Description" column
 124 our $projects_list_description_width = 25;
 125
 126 # group projects by category on the projects list
 127 # (enabled if this variable evaluates to true)
 128 our $projects_list_group_categories = 0;
 129
 130 # default category if none specified
 131 # (leave the empty string for no category)
 132 our $project_list_default_category = "";
 133
 134 # default order of projects list
 135 # valid values are none, project, descr, owner, and age
 136 our $default_projects_order = "project";
 137
 138 # show repository only if this file exists
 139 # (only effective if this variable evaluates to true)
 140 our $export_ok = "++GITWEB_EXPORT_OK++";
 141
 142 # don't generate age column on the projects list page
 143 our $omit_age_column = 0;
 144
 145 # don't generate information about owners of repositories
 146 our $omit_owner=0;
 147
 148 # show repository only if this subroutine returns true
 149 # when given the path to the project, for example:
 150 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 151 our $export_auth_hook = undef;
 152
 153 # only allow viewing of repositories also shown on the overview page
 154 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 155
 156 # list of git base URLs used for URL to where fetch project from,
 157 # i.e. full URL is "$git_base_url/$project"
 158 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 159
 160 # default blob_plain mimetype and default charset for text/plain blob
 161 our $default_blob_plain_mimetype = 'text/plain';
 162 our $default_text_plain_charset  = undef;
 163
 164 # file to use for guessing MIME types before trying /etc/mime.types
 165 # (relative to the current git repository)
 166 our $mimetypes_file = undef;
 167
 168 # assume this charset if line contains non-UTF-8 characters;
 169 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 170 # for which encoding all byte sequences are valid, for example
 171 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 172 # could be even 'utf-8' for the old behavior)
 173 our $fallback_encoding = 'latin1';
 174
 175 # rename detection options for git-diff and git-diff-tree
 176 # - default is '-M', with the cost proportional to
 177 #   (number of removed files) * (number of new files).
 178 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 179 #   (number of changed files + number of removed files) * (number of new files)
 180 # - even more costly is '-C', '--find-copies-harder' with cost
 181 #   (number of files in the original tree) * (number of new files)
 182 # - one might want to include '-B' option, e.g. '-B', '-M'
 183 our @diff_opts = ('-M'); # taken from git_commit
 184
 185 # Disables features that would allow repository owners to inject script into
 186 # the gitweb domain.
 187 our $prevent_xss = 0;
 188
 189 # Path to the highlight executable to use (must be the one from
 190 # http://www.andre-simon.de due to assumptions about parameters and output).
 191 # Useful if highlight is not installed on your webserver's PATH.
 192 # [Default: highlight]
 193 our $highlight_bin = "++HIGHLIGHT_BIN++";
 194
 195 # information about snapshot formats that gitweb is capable of serving
 196 our %known_snapshot_formats = (
 197         # name => {
 198         #       'display' => display name,
 199         #       'type' => mime type,
 200         #       'suffix' => filename suffix,
 201         #       'format' => --format for git-archive,
 202         #       'compressor' => [compressor command and arguments]
 203         #                       (array reference, optional)
 204         #       'disabled' => boolean (optional)}
 205         #
 206         'tgz' => {
 207                 'display' => 'tar.gz',
 208                 'type' => 'application/x-gzip',
 209                 'suffix' => '.tar.gz',
 210                 'format' => 'tar',
 211                 'compressor' => ['gzip', '-n']},
 212
 213         'tbz2' => {
 214                 'display' => 'tar.bz2',
 215                 'type' => 'application/x-bzip2',
 216                 'suffix' => '.tar.bz2',
 217                 'format' => 'tar',
 218                 'compressor' => ['bzip2']},
 219
 220         'txz' => {
 221                 'display' => 'tar.xz',
 222                 'type' => 'application/x-xz',
 223                 'suffix' => '.tar.xz',
 224                 'format' => 'tar',
 225                 'compressor' => ['xz'],
 226                 'disabled' => 1},
 227
 228         'zip' => {
 229                 'display' => 'zip',
 230                 'type' => 'application/x-zip',
 231                 'suffix' => '.zip',
 232                 'format' => 'zip'},
 233 );
 234
 235 # Aliases so we understand old gitweb.snapshot values in repository
 236 # configuration.
 237 our %known_snapshot_format_aliases = (
 238         'gzip'  => 'tgz',
 239         'bzip2' => 'tbz2',
 240         'xz'    => 'txz',
 241
 242         # backward compatibility: legacy gitweb config support
 243         'x-gzip' => undef, 'gz' => undef,
 244         'x-bzip2' => undef, 'bz2' => undef,
 245         'x-zip' => undef, '' => undef,
 246 );
 247
 248 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 249 # are changed, it may be appropriate to change these values too via
 250 # $GITWEB_CONFIG.
 251 our %avatar_size = (
 252         'default' => 16,
 253         'double'  => 32
 254 );
 255
 256 # Used to set the maximum load that we will still respond to gitweb queries.
 257 # If server load exceed this value then return "503 server busy" error.
 258 # If gitweb cannot determined server load, it is taken to be 0.
 259 # Leave it undefined (or set to 'undef') to turn off load checking.
 260 our $maxload = 300;
 261
 262 # configuration for 'highlight' (http://www.andre-simon.de/)
 263 # match by basename
 264 our %highlight_basename = (
 265         #'Program' => 'py',
 266         #'Library' => 'py',
 267         'SConstruct' => 'py', # SCons equivalent of Makefile
 268         'Makefile' => 'make',
 269 );
 270 # match by extension
 271 our %highlight_ext = (
 272         # main extensions, defining name of syntax;
 273         # see files in /usr/share/highlight/langDefs/ directory
 274         map { $_ => $_ }
 275                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl sql make),
 276         # alternate extensions, see /etc/highlight/filetypes.conf
 277         'h' => 'c',
 278         map { $_ => 'sh'  } qw(bash zsh ksh),
 279         map { $_ => 'cpp' } qw(cxx c++ cc),
 280         map { $_ => 'php' } qw(php3 php4 php5 phps),
 281         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 282         map { $_ => 'make'} qw(mak mk),
 283         map { $_ => 'xml' } qw(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         # $feature{'remote_heads'}{'override'} = 1;
 545         # and in project config gitweb.remote_heads = 0|1;
 546         'remote_heads' => {
 547                 'sub' => sub { feature_bool('remote_heads', @_) },
 548                 'override' => 0,
 549                 'default' => [0]},
 550 );
 551
 552 sub gitweb_get_feature {
 553         my ($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++";
 685         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 686         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 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:]])|($1 =~ /[\t\n\r]/ ? $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                 $key = join(".", lc($hi), $mi, lc($lo));
2702         } else {
2703                 $key = lc($key);
2704         }
2705         $key =~ s/^gitweb\.//;
2706         return if ($key =~ m/\W/);
2707
2708         # type sanity check
2709         if (defined $type) {
2710                 $type =~ s/^--//;
2711                 $type = undef
2712                         unless ($type eq 'bool' || $type eq 'int');
2713         }
2714
2715         # get config
2716         if (!defined $config_file ||
2717             $config_file ne "$git_dir/config") {
2718                 %config = git_parse_project_config('gitweb');
2719                 $config_file = "$git_dir/config";
2720         }
2721
2722         # check if config variable (key) exists
2723         return unless exists $config{"gitweb.$key"};
2724
2725         # ensure given type
2726         if (!defined $type) {
2727                 return $config{"gitweb.$key"};
2728         } elsif ($type eq 'bool') {
2729                 # backward compatibility: 'git config --bool' returns true/false
2730                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2731         } elsif ($type eq 'int') {
2732                 return config_to_int($config{"gitweb.$key"});
2733         }
2734         return $config{"gitweb.$key"};
2735 }
2736
2737 # get hash of given path at given ref
2738 sub git_get_hash_by_path {
2739         my $base = shift;
2740         my $path = shift || return undef;
2741         my $type = shift;
2742
2743         $path =~ s,/+$,,;
2744
2745         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2746                 or die_error(500, "Open git-ls-tree failed");
2747         my $line = <$fd>;
2748         close $fd or return undef;
2749
2750         if (!defined $line) {
2751                 # there is no tree or hash given by $path at $base
2752                 return undef;
2753         }
2754
2755         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2756         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2757         if (defined $type && $type ne $2) {
2758                 # type doesn't match
2759                 return undef;
2760         }
2761         return $3;
2762 }
2763
2764 # get path of entry with given hash at given tree-ish (ref)
2765 # used to get 'from' filename for combined diff (merge commit) for renames
2766 sub git_get_path_by_hash {
2767         my $base = shift || return;
2768         my $hash = shift || return;
2769
2770         local $/ = "\0";
2771
2772         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2773                 or return undef;
2774         while (my $line = <$fd>) {
2775                 chomp $line;
2776
2777                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2778                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2779                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2780                         close $fd;
2781                         return $1;
2782                 }
2783         }
2784         close $fd;
2785         return undef;
2786 }
2787
2788 ## ......................................................................
2789 ## git utility functions, directly accessing git repository
2790
2791 # get the value of config variable either from file named as the variable
2792 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2793 # configuration variable in the repository config file.
2794 sub git_get_file_or_project_config {
2795         my ($path, $name) = @_;
2796
2797         $git_dir = "$projectroot/$path";
2798         open my $fd, '<', "$git_dir/$name"
2799                 or return git_get_project_config($name);
2800         my $conf = <$fd>;
2801         close $fd;
2802         if (defined $conf) {
2803                 chomp $conf;
2804         }
2805         return $conf;
2806 }
2807
2808 sub git_get_project_description {
2809         my $path = shift;
2810         return git_get_file_or_project_config($path, 'description');
2811 }
2812
2813 sub git_get_project_category {
2814         my $path = shift;
2815         return git_get_file_or_project_config($path, 'category');
2816 }
2817
2818
2819 # supported formats:
2820 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2821 #   - if its contents is a number, use it as tag weight,
2822 #   - otherwise add a tag with weight 1
2823 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2824 #   the same value multiple times increases tag weight
2825 # * `gitweb.ctag' multi-valued repo config variable
2826 sub git_get_project_ctags {
2827         my $project = shift;
2828         my $ctags = {};
2829
2830         $git_dir = "$projectroot/$project";
2831         if (opendir my $dh, "$git_dir/ctags") {
2832                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2833                 foreach my $tagfile (@files) {
2834                         open my $ct, '<', $tagfile
2835                                 or next;
2836                         my $val = <$ct>;
2837                         chomp $val if $val;
2838                         close $ct;
2839
2840                         (my $ctag = $tagfile) =~ s#.*/##;
2841                         if ($val =~ /^\d+$/) {
2842                                 $ctags->{$ctag} = $val;
2843                         } else {
2844                                 $ctags->{$ctag} = 1;
2845                         }
2846                 }
2847                 closedir $dh;
2848
2849         } elsif (open my $fh, '<', "$git_dir/ctags") {
2850                 while (my $line = <$fh>) {
2851                         chomp $line;
2852                         $ctags->{$line}++ if $line;
2853                 }
2854                 close $fh;
2855
2856         } else {
2857                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2858                 foreach my $tag (@$taglist) {
2859                         $ctags->{$tag}++;
2860                 }
2861         }
2862
2863         return $ctags;
2864 }
2865
2866 # return hash, where keys are content tags ('ctags'),
2867 # and values are sum of weights of given tag in every project
2868 sub git_gather_all_ctags {
2869         my $projects = shift;
2870         my $ctags = {};
2871
2872         foreach my $p (@$projects) {
2873                 foreach my $ct (keys %{$p->{'ctags'}}) {
2874                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2875                 }
2876         }
2877
2878         return $ctags;
2879 }
2880
2881 sub git_populate_project_tagcloud {
2882         my $ctags = shift;
2883
2884         # First, merge different-cased tags; tags vote on casing
2885         my %ctags_lc;
2886         foreach (keys %$ctags) {
2887                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2888                 if (not $ctags_lc{lc $_}->{topcount}
2889                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2890                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2891                         $ctags_lc{lc $_}->{topname} = $_;
2892                 }
2893         }
2894
2895         my $cloud;
2896         my $matched = $input_params{'ctag'};
2897         if (eval { require HTML::TagCloud; 1; }) {
2898                 $cloud = HTML::TagCloud->new;
2899                 foreach my $ctag (sort keys %ctags_lc) {
2900                         # Pad the title with spaces so that the cloud looks
2901                         # less crammed.
2902                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2903                         $title =~ s/ /&nbsp;/g;
2904                         $title =~ s/^/&nbsp;/g;
2905                         $title =~ s/$/&nbsp;/g;
2906                         if (defined $matched && $matched eq $ctag) {
2907                                 $title = qq(<span class="match">$title</span>);
2908                         }
2909                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2910                                     $ctags_lc{$ctag}->{count});
2911                 }
2912         } else {
2913                 $cloud = {};
2914                 foreach my $ctag (keys %ctags_lc) {
2915                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2916                         if (defined $matched && $matched eq $ctag) {
2917                                 $title = qq(<span class="match">$title</span>);
2918                         }
2919                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2920                         $cloud->{$ctag}{ctag} =
2921                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2922                 }
2923         }
2924         return $cloud;
2925 }
2926
2927 sub git_show_project_tagcloud {
2928         my ($cloud, $count) = @_;
2929         if (ref $cloud eq 'HTML::TagCloud') {
2930                 return $cloud->html_and_css($count);
2931         } else {
2932                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2933                 return
2934                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2935                         join (', ', map {
2936                                 $cloud->{$_}->{'ctag'}
2937                         } splice(@tags, 0, $count)) .
2938                         '</div>';
2939         }
2940 }
2941
2942 sub git_get_project_url_list {
2943         my $path = shift;
2944
2945         $git_dir = "$projectroot/$path";
2946         open my $fd, '<', "$git_dir/cloneurl"
2947                 or return wantarray ?
2948                 @{ config_to_multi(git_get_project_config('url')) } :
2949                    config_to_multi(git_get_project_config('url'));
2950         my @git_project_url_list = map { chomp; $_ } <$fd>;
2951         close $fd;
2952
2953         return wantarray ? @git_project_url_list : \@git_project_url_list;
2954 }
2955
2956 sub git_get_projects_list {
2957         my $filter = shift || '';
2958         my $paranoid = shift;
2959         my @list;
2960
2961         if (-d $projects_list) {
2962                 # search in directory
2963                 my $dir = $projects_list;
2964                 # remove the trailing "/"
2965                 $dir =~ s!/+$!!;
2966                 my $pfxlen = length("$dir");
2967                 my $pfxdepth = ($dir =~ tr!/!!);
2968                 # when filtering, search only given subdirectory
2969                 if ($filter && !$paranoid) {
2970                         $dir .= "/$filter";
2971                         $dir =~ s!/+$!!;
2972                 }
2973
2974                 File::Find::find({
2975                         follow_fast => 1, # follow symbolic links
2976                         follow_skip => 2, # ignore duplicates
2977                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2978                         wanted => sub {
2979                                 # global variables
2980                                 our $project_maxdepth;
2981                                 our $projectroot;
2982                                 # skip project-list toplevel, if we get it.
2983                                 return if (m!^[/.]$!);
2984                                 # only directories can be git repositories
2985                                 return unless (-d $_);
2986                                 # don't traverse too deep (Find is super slow on os x)
2987                                 # $project_maxdepth excludes depth of $projectroot
2988                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2989                                         $File::Find::prune = 1;
2990                                         return;
2991                                 }
2992
2993                                 my $path = substr($File::Find::name, $pfxlen + 1);
2994                                 # paranoidly only filter here
2995                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
2996                                         next;
2997                                 }
2998                                 # we check related file in $projectroot
2999                                 if (check_export_ok("$projectroot/$path")) {
3000                                         push @list, { path => $path };
3001                                         $File::Find::prune = 1;
3002                                 }
3003                         },
3004                 }, "$dir");
3005
3006         } elsif (-f $projects_list) {
3007                 # read from file(url-encoded):
3008                 # 'git%2Fgit.git Linus+Torvalds'
3009                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3010                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3011                 open my $fd, '<', $projects_list or return;
3012         PROJECT:
3013                 while (my $line = <$fd>) {
3014                         chomp $line;
3015                         my ($path, $owner) = split ' ', $line;
3016                         $path = unescape($path);
3017                         $owner = unescape($owner);
3018                         if (!defined $path) {
3019                                 next;
3020                         }
3021                         # if $filter is rpovided, check if $path begins with $filter
3022                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3023                                 next;
3024                         }
3025                         if (check_export_ok("$projectroot/$path")) {
3026                                 my $pr = {
3027                                         path => $path
3028                                 };
3029                                 if ($owner) {
3030                                         $pr->{'owner'} = to_utf8($owner);
3031                                 }
3032                                 push @list, $pr;
3033                         }
3034                 }
3035                 close $fd;
3036         }
3037         return @list;
3038 }
3039
3040 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3041 # as side effects it sets 'forks' field to list of forks for forked projects
3042 sub filter_forks_from_projects_list {
3043         my $projects = shift;
3044
3045         my %trie; # prefix tree of directories (path components)
3046         # generate trie out of those directories that might contain forks
3047         foreach my $pr (@$projects) {
3048                 my $path = $pr->{'path'};
3049                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3050                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3051                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3052                 next unless (-d "$projectroot/$path"); # containing directory exists
3053                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3054
3055                 # add to trie
3056                 my @dirs = split('/', $path);
3057                 # walk the trie, until either runs out of components or out of trie
3058                 my $ref = \%trie;
3059                 while (scalar @dirs &&
3060                        exists($ref->{$dirs[0]})) {
3061                         $ref = $ref->{shift @dirs};
3062                 }
3063                 # create rest of trie structure from rest of components
3064                 foreach my $dir (@dirs) {
3065                         $ref = $ref->{$dir} = {};
3066                 }
3067                 # create end marker, store $pr as a data
3068                 $ref->{''} = $pr if (!exists $ref->{''});
3069         }
3070
3071         # filter out forks, by finding shortest prefix match for paths
3072         my @filtered;
3073  PROJECT:
3074         foreach my $pr (@$projects) {
3075                 # trie lookup
3076                 my $ref = \%trie;
3077         DIR:
3078                 foreach my $dir (split('/', $pr->{'path'})) {
3079                         if (exists $ref->{''}) {
3080                                 # found [shortest] prefix, is a fork - skip it
3081                                 push @{$ref->{''}{'forks'}}, $pr;
3082                                 next PROJECT;
3083                         }
3084                         if (!exists $ref->{$dir}) {
3085                                 # not in trie, cannot have prefix, not a fork
3086                                 push @filtered, $pr;
3087                                 next PROJECT;
3088                         }
3089                         # If the dir is there, we just walk one step down the trie.
3090                         $ref = $ref->{$dir};
3091                 }
3092                 # we ran out of trie
3093                 # (shouldn't happen: it's either no match, or end marker)
3094                 push @filtered, $pr;
3095         }
3096
3097         return @filtered;
3098 }
3099
3100 # note: fill_project_list_info must be run first,
3101 # for 'descr_long' and 'ctags' to be filled
3102 sub search_projects_list {
3103         my ($projlist, %opts) = @_;
3104         my $tagfilter  = $opts{'tagfilter'};
3105         my $search_re = $opts{'search_regexp'};
3106
3107         return @$projlist
3108                 unless ($tagfilter || $search_re);
3109
3110         # searching projects require filling to be run before it;
3111         fill_project_list_info($projlist,
3112                                $tagfilter  ? 'ctags' : (),
3113                                $search_re ? ('path', 'descr') : ());
3114         my @projects;
3115  PROJECT:
3116         foreach my $pr (@$projlist) {
3117
3118                 if ($tagfilter) {
3119                         next unless ref($pr->{'ctags'}) eq 'HASH';
3120                         next unless
3121                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3122                 }
3123
3124                 if ($search_re) {
3125                         next unless
3126                                 $pr->{'path'} =~ /$search_re/ ||
3127                                 $pr->{'descr_long'} =~ /$search_re/;
3128                 }
3129
3130                 push @projects, $pr;
3131         }
3132
3133         return @projects;
3134 }
3135
3136 our $gitweb_project_owner = undef;
3137 sub git_get_project_list_from_file {
3138
3139         return if (defined $gitweb_project_owner);
3140
3141         $gitweb_project_owner = {};
3142         # read from file (url-encoded):
3143         # 'git%2Fgit.git Linus+Torvalds'
3144         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3145         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3146         if (-f $projects_list) {
3147                 open(my $fd, '<', $projects_list);
3148                 while (my $line = <$fd>) {
3149                         chomp $line;
3150                         my ($pr, $ow) = split ' ', $line;
3151                         $pr = unescape($pr);
3152                         $ow = unescape($ow);
3153                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3154                 }
3155                 close $fd;
3156         }
3157 }
3158
3159 sub git_get_project_owner {
3160         my $project = shift;
3161         my $owner;
3162
3163         return undef unless $project;
3164         $git_dir = "$projectroot/$project";
3165
3166         if (!defined $gitweb_project_owner) {
3167                 git_get_project_list_from_file();
3168         }
3169
3170         if (exists $gitweb_project_owner->{$project}) {
3171                 $owner = $gitweb_project_owner->{$project};
3172         }
3173         if (!defined $owner){
3174                 $owner = git_get_project_config('owner');
3175         }
3176         if (!defined $owner) {
3177                 $owner = get_file_owner("$git_dir");
3178         }
3179
3180         return $owner;
3181 }
3182
3183 sub git_get_last_activity {
3184         my ($path) = @_;
3185         my $fd;
3186
3187         $git_dir = "$projectroot/$path";
3188         open($fd, "-|", git_cmd(), 'for-each-ref',
3189              '--format=%(committer)',
3190              '--sort=-committerdate',
3191              '--count=1',
3192              'refs/heads') or return;
3193         my $most_recent = <$fd>;
3194         close $fd or return;
3195         if (defined $most_recent &&
3196             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3197                 my $timestamp = $1;
3198                 my $age = time - $timestamp;
3199                 return ($age, age_string($age));
3200         }
3201         return (undef, undef);
3202 }
3203
3204 # Implementation note: when a single remote is wanted, we cannot use 'git
3205 # remote show -n' because that command always work (assuming it's a remote URL
3206 # if it's not defined), and we cannot use 'git remote show' because that would
3207 # try to make a network roundtrip. So the only way to find if that particular
3208 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3209 # and when we find what we want.
3210 sub git_get_remotes_list {
3211         my $wanted = shift;
3212         my %remotes = ();
3213
3214         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3215         return unless $fd;
3216         while (my $remote = <$fd>) {
3217                 chomp $remote;
3218                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3219                 next if $wanted and not $remote eq $wanted;
3220                 my ($url, $key) = ($1, $2);
3221
3222                 $remotes{$remote} ||= { 'heads' => () };
3223                 $remotes{$remote}{$key} = $url;
3224         }
3225         close $fd or return;
3226         return wantarray ? %remotes : \%remotes;
3227 }
3228
3229 # Takes a hash of remotes as first parameter and fills it by adding the
3230 # available remote heads for each of the indicated remotes.
3231 sub fill_remote_heads {
3232         my $remotes = shift;
3233         my @heads = map { "remotes/$_" } keys %$remotes;
3234         my @remoteheads = git_get_heads_list(undef, @heads);
3235         foreach my $remote (keys %$remotes) {
3236                 $remotes->{$remote}{'heads'} = [ grep {
3237                         $_->{'name'} =~ s!^$remote/!!
3238                         } @remoteheads ];
3239         }
3240 }
3241
3242 sub git_get_references {
3243         my $type = shift || "";
3244         my %refs;
3245         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3246         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3247         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3248                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3249                 or return;
3250
3251         while (my $line = <$fd>) {
3252                 chomp $line;
3253                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3254                         if (defined $refs{$1}) {
3255                                 push @{$refs{$1}}, $2;
3256                         } else {
3257                                 $refs{$1} = [ $2 ];
3258                         }
3259                 }
3260         }
3261         close $fd or return;
3262         return \%refs;
3263 }
3264
3265 sub git_get_rev_name_tags {
3266         my $hash = shift || return undef;
3267
3268         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3269                 or return;
3270         my $name_rev = <$fd>;
3271         close $fd;
3272
3273         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3274                 return $1;
3275         } else {
3276                 # catches also '$hash undefined' output
3277                 return undef;
3278         }
3279 }
3280
3281 ## ----------------------------------------------------------------------
3282 ## parse to hash functions
3283
3284 sub parse_date {
3285         my $epoch = shift;
3286         my $tz = shift || "-0000";
3287
3288         my %date;
3289         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3290         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3291         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3292         $date{'hour'} = $hour;
3293         $date{'minute'} = $min;
3294         $date{'mday'} = $mday;
3295         $date{'day'} = $days[$wday];
3296         $date{'month'} = $months[$mon];
3297         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3298                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3299         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3300                              $mday, $months[$mon], $hour ,$min;
3301         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3302                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3303
3304         my ($tz_sign, $tz_hour, $tz_min) =
3305                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3306         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3307         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3308         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3309         $date{'hour_local'} = $hour;
3310         $date{'minute_local'} = $min;
3311         $date{'tz_local'} = $tz;
3312         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3313                                   1900+$year, $mon+1, $mday,
3314                                   $hour, $min, $sec, $tz);
3315         return %date;
3316 }
3317
3318 sub parse_tag {
3319         my $tag_id = shift;
3320         my %tag;
3321         my @comment;
3322
3323         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3324         $tag{'id'} = $tag_id;
3325         while (my $line = <$fd>) {
3326                 chomp $line;
3327                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3328                         $tag{'object'} = $1;
3329                 } elsif ($line =~ m/^type (.+)$/) {
3330                         $tag{'type'} = $1;
3331                 } elsif ($line =~ m/^tag (.+)$/) {
3332                         $tag{'name'} = $1;
3333                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3334                         $tag{'author'} = $1;
3335                         $tag{'author_epoch'} = $2;
3336                         $tag{'author_tz'} = $3;
3337                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3338                                 $tag{'author_name'}  = $1;
3339                                 $tag{'author_email'} = $2;
3340                         } else {
3341                                 $tag{'author_name'} = $tag{'author'};
3342                         }
3343                 } elsif ($line =~ m/--BEGIN/) {
3344                         push @comment, $line;
3345                         last;
3346                 } elsif ($line eq "") {
3347                         last;
3348                 }
3349         }
3350         push @comment, <$fd>;
3351         $tag{'comment'} = \@comment;
3352         close $fd or return;
3353         if (!defined $tag{'name'}) {
3354                 return
3355         };
3356         return %tag
3357 }
3358
3359 sub parse_commit_text {
3360         my ($commit_text, $withparents) = @_;
3361         my @commit_lines = split '\n', $commit_text;
3362         my %co;
3363
3364         pop @commit_lines; # Remove '\0'
3365
3366         if (! @commit_lines) {
3367                 return;
3368         }
3369
3370         my $header = shift @commit_lines;
3371         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3372                 return;
3373         }
3374         ($co{'id'}, my @parents) = split ' ', $header;
3375         while (my $line = shift @commit_lines) {
3376                 last if $line eq "\n";
3377                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3378                         $co{'tree'} = $1;
3379                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3380                         push @parents, $1;
3381                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3382                         $co{'author'} = to_utf8($1);
3383                         $co{'author_epoch'} = $2;
3384                         $co{'author_tz'} = $3;
3385                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3386                                 $co{'author_name'}  = $1;
3387                                 $co{'author_email'} = $2;
3388                         } else {
3389                                 $co{'author_name'} = $co{'author'};
3390                         }
3391                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3392                         $co{'committer'} = to_utf8($1);
3393                         $co{'committer_epoch'} = $2;
3394                         $co{'committer_tz'} = $3;
3395                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3396                                 $co{'committer_name'}  = $1;
3397                                 $co{'committer_email'} = $2;
3398                         } else {
3399                                 $co{'committer_name'} = $co{'committer'};
3400                         }
3401                 }
3402         }
3403         if (!defined $co{'tree'}) {
3404                 return;
3405         };
3406         $co{'parents'} = \@parents;
3407         $co{'parent'} = $parents[0];
3408
3409         foreach my $title (@commit_lines) {
3410                 $title =~ s/^    //;
3411                 if ($title ne "") {
3412                         $co{'title'} = chop_str($title, 80, 5);
3413                         # remove leading stuff of merges to make the interesting part visible
3414                         if (length($title) > 50) {
3415                                 $title =~ s/^Automatic //;
3416                                 $title =~ s/^merge (of|with) /Merge ... /i;
3417                                 if (length($title) > 50) {
3418                                         $title =~ s/(http|rsync):\/\///;
3419                                 }
3420                                 if (length($title) > 50) {
3421                                         $title =~ s/(master|www|rsync)\.//;
3422                                 }
3423                                 if (length($title) > 50) {
3424                                         $title =~ s/kernel.org:?//;
3425                                 }
3426                                 if (length($title) > 50) {
3427                                         $title =~ s/\/pub\/scm//;
3428                                 }
3429                         }
3430                         $co{'title_short'} = chop_str($title, 50, 5);
3431                         last;
3432                 }
3433         }
3434         if (! defined $co{'title'} || $co{'title'} eq "") {
3435                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3436         }
3437         # remove added spaces
3438         foreach my $line (@commit_lines) {
3439                 $line =~ s/^    //;
3440         }
3441         $co{'comment'} = \@commit_lines;
3442
3443         my $age = time - $co{'committer_epoch'};
3444         $co{'age'} = $age;
3445         $co{'age_string'} = age_string($age);
3446         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3447         if ($age > 60*60*24*7*2) {
3448                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3449                 $co{'age_string_age'} = $co{'age_string'};
3450         } else {
3451                 $co{'age_string_date'} = $co{'age_string'};
3452                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3453         }
3454         return %co;
3455 }
3456
3457 sub parse_commit {
3458         my ($commit_id) = @_;
3459         my %co;
3460
3461         local $/ = "\0";
3462
3463         open my $fd, "-|", git_cmd(), "rev-list",
3464                 "--parents",
3465                 "--header",
3466                 "--max-count=1",
3467                 $commit_id,
3468                 "--",
3469                 or die_error(500, "Open git-rev-list failed");
3470         %co = parse_commit_text(<$fd>, 1);
3471         close $fd;
3472
3473         return %co;
3474 }
3475
3476 sub parse_commits {
3477         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3478         my @cos;
3479
3480         $maxcount ||= 1;
3481         $skip ||= 0;
3482
3483         local $/ = "\0";
3484
3485         open my $fd, "-|", git_cmd(), "rev-list",
3486                 "--header",
3487                 @args,
3488                 ("--max-count=" . $maxcount),
3489                 ("--skip=" . $skip),
3490                 @extra_options,
3491                 $commit_id,
3492                 "--",
3493                 ($filename ? ($filename) : ())
3494                 or die_error(500, "Open git-rev-list failed");
3495         while (my $line = <$fd>) {
3496                 my %co = parse_commit_text($line);
3497                 push @cos, \%co;
3498         }
3499         close $fd;
3500
3501         return wantarray ? @cos : \@cos;
3502 }
3503
3504 # parse line of git-diff-tree "raw" output
3505 sub parse_difftree_raw_line {
3506         my $line = shift;
3507         my %res;
3508
3509         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3510         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3511         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3512                 $res{'from_mode'} = $1;
3513                 $res{'to_mode'} = $2;
3514                 $res{'from_id'} = $3;
3515                 $res{'to_id'} = $4;
3516                 $res{'status'} = $5;
3517                 $res{'similarity'} = $6;
3518                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3519                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3520                 } else {
3521                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3522                 }
3523         }
3524         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3525         # combined diff (for merge commit)
3526         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3527                 $res{'nparents'}  = length($1);
3528                 $res{'from_mode'} = [ split(' ', $2) ];
3529                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3530                 $res{'from_id'} = [ split(' ', $3) ];
3531                 $res{'to_id'} = pop @{$res{'from_id'}};
3532                 $res{'status'} = [ split('', $4) ];
3533                 $res{'to_file'} = unquote($5);
3534         }
3535         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3536         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3537                 $res{'commit'} = $1;
3538         }
3539
3540         return wantarray ? %res : \%res;
3541 }
3542
3543 # wrapper: return parsed line of git-diff-tree "raw" output
3544 # (the argument might be raw line, or parsed info)
3545 sub parsed_difftree_line {
3546         my $line_or_ref = shift;
3547
3548         if (ref($line_or_ref) eq "HASH") {
3549                 # pre-parsed (or generated by hand)
3550                 return $line_or_ref;
3551         } else {
3552                 return parse_difftree_raw_line($line_or_ref);
3553         }
3554 }
3555
3556 # parse line of git-ls-tree output
3557 sub parse_ls_tree_line {
3558         my $line = shift;
3559         my %opts = @_;
3560         my %res;
3561
3562         if ($opts{'-l'}) {
3563                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3564                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3565
3566                 $res{'mode'} = $1;
3567                 $res{'type'} = $2;
3568                 $res{'hash'} = $3;
3569                 $res{'size'} = $4;
3570                 if ($opts{'-z'}) {
3571                         $res{'name'} = $5;
3572                 } else {
3573                         $res{'name'} = unquote($5);
3574                 }
3575         } else {
3576                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3577                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3578
3579                 $res{'mode'} = $1;
3580                 $res{'type'} = $2;
3581                 $res{'hash'} = $3;
3582                 if ($opts{'-z'}) {
3583                         $res{'name'} = $4;
3584                 } else {
3585                         $res{'name'} = unquote($4);
3586                 }
3587         }
3588
3589         return wantarray ? %res : \%res;
3590 }
3591
3592 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3593 sub parse_from_to_diffinfo {
3594         my ($diffinfo, $from, $to, @parents) = @_;
3595
3596         if ($diffinfo->{'nparents'}) {
3597                 # combined diff
3598                 $from->{'file'} = [];
3599                 $from->{'href'} = [];
3600                 fill_from_file_info($diffinfo, @parents)
3601                         unless exists $diffinfo->{'from_file'};
3602                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3603                         $from->{'file'}[$i] =
3604                                 defined $diffinfo->{'from_file'}[$i] ?
3605                                         $diffinfo->{'from_file'}[$i] :
3606                                         $diffinfo->{'to_file'};
3607                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3608                                 $from->{'href'}[$i] = href(action=>"blob",
3609                                                            hash_base=>$parents[$i],
3610                                                            hash=>$diffinfo->{'from_id'}[$i],
3611                                                            file_name=>$from->{'file'}[$i]);
3612                         } else {
3613                                 $from->{'href'}[$i] = undef;
3614                         }
3615                 }
3616         } else {
3617                 # ordinary (not combined) diff
3618                 $from->{'file'} = $diffinfo->{'from_file'};
3619                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3620                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3621                                                hash=>$diffinfo->{'from_id'},
3622                                                file_name=>$from->{'file'});
3623                 } else {
3624                         delete $from->{'href'};
3625                 }
3626         }
3627
3628         $to->{'file'} = $diffinfo->{'to_file'};
3629         if (!is_deleted($diffinfo)) { # file exists in result
3630                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3631                                      hash=>$diffinfo->{'to_id'},
3632                                      file_name=>$to->{'file'});
3633         } else {
3634                 delete $to->{'href'};
3635         }
3636 }
3637
3638 ## ......................................................................
3639 ## parse to array of hashes functions
3640
3641 sub git_get_heads_list {
3642         my ($limit, @classes) = @_;
3643         @classes = ('heads') unless @classes;
3644         my @patterns = map { "refs/$_" } @classes;
3645         my @headslist;
3646
3647         open my $fd, '-|', git_cmd(), 'for-each-ref',
3648                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3649                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3650                 @patterns
3651                 or return;
3652         while (my $line = <$fd>) {
3653                 my %ref_item;
3654
3655                 chomp $line;
3656                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3657                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3658                 my ($committer, $epoch, $tz) =
3659                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3660                 $ref_item{'fullname'}  = $name;
3661                 $name =~ s!^refs/(?:head|remote)s/!!;
3662
3663                 $ref_item{'name'}  = $name;
3664                 $ref_item{'id'}    = $hash;
3665                 $ref_item{'title'} = $title || '(no commit message)';
3666                 $ref_item{'epoch'} = $epoch;
3667                 if ($epoch) {
3668                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3669                 } else {
3670                         $ref_item{'age'} = "unknown";
3671                 }
3672
3673                 push @headslist, \%ref_item;
3674         }
3675         close $fd;
3676
3677         return wantarray ? @headslist : \@headslist;
3678 }
3679
3680 sub git_get_tags_list {
3681         my $limit = shift;
3682         my @tagslist;
3683
3684         open my $fd, '-|', git_cmd(), 'for-each-ref',
3685                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3686                 '--format=%(objectname) %(objecttype) %(refname) '.
3687                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3688                 'refs/tags'
3689                 or return;
3690         while (my $line = <$fd>) {
3691                 my %ref_item;
3692
3693                 chomp $line;
3694                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3695                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3696                 my ($creator, $epoch, $tz) =
3697                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3698                 $ref_item{'fullname'} = $name;
3699                 $name =~ s!^refs/tags/!!;
3700
3701                 $ref_item{'type'} = $type;
3702                 $ref_item{'id'} = $id;
3703                 $ref_item{'name'} = $name;
3704                 if ($type eq "tag") {
3705                         $ref_item{'subject'} = $title;
3706                         $ref_item{'reftype'} = $reftype;
3707                         $ref_item{'refid'}   = $refid;
3708                 } else {
3709                         $ref_item{'reftype'} = $type;
3710                         $ref_item{'refid'}   = $id;
3711                 }
3712
3713                 if ($type eq "tag" || $type eq "commit") {
3714                         $ref_item{'epoch'} = $epoch;
3715                         if ($epoch) {
3716                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3717                         } else {
3718                                 $ref_item{'age'} = "unknown";
3719                         }
3720                 }
3721
3722                 push @tagslist, \%ref_item;
3723         }
3724         close $fd;
3725
3726         return wantarray ? @tagslist : \@tagslist;
3727 }
3728
3729 ## ----------------------------------------------------------------------
3730 ## filesystem-related functions
3731
3732 sub get_file_owner {
3733         my $path = shift;
3734
3735         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3736         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3737         if (!defined $gcos) {
3738                 return undef;
3739         }
3740         my $owner = $gcos;
3741         $owner =~ s/[,;].*$//;
3742         return to_utf8($owner);
3743 }
3744
3745 # assume that file exists
3746 sub insert_file {
3747         my $filename = shift;
3748
3749         open my $fd, '<', $filename;
3750         print map { to_utf8($_) } <$fd>;
3751         close $fd;
3752 }
3753
3754 ## ......................................................................
3755 ## mimetype related functions
3756
3757 sub mimetype_guess_file {
3758         my $filename = shift;
3759         my $mimemap = shift;
3760         -r $mimemap or return undef;
3761
3762         my %mimemap;
3763         open(my $mh, '<', $mimemap) or return undef;
3764         while (<$mh>) {
3765                 next if m/^#/; # skip comments
3766                 my ($mimetype, @exts) = split(/\s+/);
3767                 foreach my $ext (@exts) {
3768                         $mimemap{$ext} = $mimetype;
3769                 }
3770         }
3771         close($mh);
3772
3773         $filename =~ /\.([^.]*)$/;
3774         return $mimemap{$1};
3775 }
3776
3777 sub mimetype_guess {
3778         my $filename = shift;
3779         my $mime;
3780         $filename =~ /\./ or return undef;
3781
3782         if ($mimetypes_file) {
3783                 my $file = $mimetypes_file;
3784                 if ($file !~ m!^/!) { # if it is relative path
3785                         # it is relative to project
3786                         $file = "$projectroot/$project/$file";
3787                 }
3788                 $mime = mimetype_guess_file($filename, $file);
3789         }
3790         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3791         return $mime;
3792 }
3793
3794 sub blob_mimetype {
3795         my $fd = shift;
3796         my $filename = shift;
3797
3798         if ($filename) {
3799                 my $mime = mimetype_guess($filename);
3800                 $mime and return $mime;
3801         }
3802
3803         # just in case
3804         return $default_blob_plain_mimetype unless $fd;
3805
3806         if (-T $fd) {
3807                 return 'text/plain';
3808         } elsif (! $filename) {
3809                 return 'application/octet-stream';
3810         } elsif ($filename =~ m/\.png$/i) {
3811                 return 'image/png';
3812         } elsif ($filename =~ m/\.gif$/i) {
3813                 return 'image/gif';
3814         } elsif ($filename =~ m/\.jpe?g$/i) {
3815                 return 'image/jpeg';
3816         } else {
3817                 return 'application/octet-stream';
3818         }
3819 }
3820
3821 sub blob_contenttype {
3822         my ($fd, $file_name, $type) = @_;
3823
3824         $type ||= blob_mimetype($fd, $file_name);
3825         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3826                 $type .= "; charset=$default_text_plain_charset";
3827         }
3828
3829         return $type;
3830 }
3831
3832 # guess file syntax for syntax highlighting; return undef if no highlighting
3833 # the name of syntax can (in the future) depend on syntax highlighter used
3834 sub guess_file_syntax {
3835         my ($highlight, $mimetype, $file_name) = @_;
3836         return undef unless ($highlight && defined $file_name);
3837         my $basename = basename($file_name, '.in');
3838         return $highlight_basename{$basename}
3839                 if exists $highlight_basename{$basename};
3840
3841         $basename =~ /\.([^.]*)$/;
3842         my $ext = $1 or return undef;
3843         return $highlight_ext{$ext}
3844                 if exists $highlight_ext{$ext};
3845
3846         return undef;
3847 }
3848
3849 # run highlighter and return FD of its output,
3850 # or return original FD if no highlighting
3851 sub run_highlighter {
3852         my ($fd, $highlight, $syntax) = @_;
3853         return $fd unless ($highlight && defined $syntax);
3854
3855         close $fd;
3856         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3857                   quote_command($highlight_bin).
3858                   " --replace-tabs=8 --fragment --syntax $syntax |"
3859                 or die_error(500, "Couldn't open file or run syntax highlighter");
3860         return $fd;
3861 }
3862
3863 ## ======================================================================
3864 ## functions printing HTML: header, footer, error page
3865
3866 sub get_page_title {
3867         my $title = to_utf8($site_name);
3868
3869         unless (defined $project) {
3870                 if (defined $project_filter) {
3871                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3872                 }
3873                 return $title;
3874         }
3875         $title .= " - " . to_utf8($project);
3876
3877         return $title unless (defined $action);
3878         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3879
3880         return $title unless (defined $file_name);
3881         $title .= " - " . esc_path($file_name);
3882         if ($action eq "tree" && $file_name !~ m|/$|) {
3883                 $title .= "/";
3884         }
3885
3886         return $title;
3887 }
3888
3889 sub get_content_type_html {
3890         # require explicit support from the UA if we are to send the page as
3891         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3892         # we have to do this because MSIE sometimes globs '*/*', pretending to
3893         # support xhtml+xml but choking when it gets what it asked for.
3894         if (defined $cgi->http('HTTP_ACCEPT') &&
3895             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3896             $cgi->Accept('application/xhtml+xml') != 0) {
3897                 return 'application/xhtml+xml';
3898         } else {
3899                 return 'text/html';
3900         }
3901 }
3902
3903 sub print_feed_meta {
3904         if (defined $project) {
3905                 my %href_params = get_feed_info();
3906                 if (!exists $href_params{'-title'}) {
3907                         $href_params{'-title'} = 'log';
3908                 }
3909
3910                 foreach my $format (qw(RSS Atom)) {
3911                         my $type = lc($format);
3912                         my %link_attr = (
3913                                 '-rel' => 'alternate',
3914                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3915                                 '-type' => "application/$type+xml"
3916                         );
3917
3918                         $href_params{'extra_options'} = undef;
3919                         $href_params{'action'} = $type;
3920                         $link_attr{'-href'} = href(%href_params);
3921                         print "<link ".
3922                               "rel=\"$link_attr{'-rel'}\" ".
3923                               "title=\"$link_attr{'-title'}\" ".
3924                               "href=\"$link_attr{'-href'}\" ".
3925                               "type=\"$link_attr{'-type'}\" ".
3926                               "/>\n";
3927
3928                         $href_params{'extra_options'} = '--no-merges';
3929                         $link_attr{'-href'} = href(%href_params);
3930                         $link_attr{'-title'} .= ' (no merges)';
3931                         print "<link ".
3932                               "rel=\"$link_attr{'-rel'}\" ".
3933                               "title=\"$link_attr{'-title'}\" ".
3934                               "href=\"$link_attr{'-href'}\" ".
3935                               "type=\"$link_attr{'-type'}\" ".
3936                               "/>\n";
3937                 }
3938
3939         } else {
3940                 printf('<link rel="alternate" title="%s projects list" '.
3941                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3942                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3943                 printf('<link rel="alternate" title="%s projects feeds" '.
3944                        'href="%s" type="text/x-opml" />'."\n",
3945                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3946         }
3947 }
3948
3949 sub print_header_links {
3950         my $status = shift;
3951
3952         # print out each stylesheet that exist, providing backwards capability
3953         # for those people who defined $stylesheet in a config file
3954         if (defined $stylesheet) {
3955                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3956         } else {
3957                 foreach my $stylesheet (@stylesheets) {
3958                         next unless $stylesheet;
3959                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3960                 }
3961         }
3962         print_feed_meta()
3963                 if ($status eq '200 OK');
3964         if (defined $favicon) {
3965                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3966         }
3967 }
3968
3969 sub print_nav_breadcrumbs_path {
3970         my $dirprefix = undef;
3971         while (my $part = shift) {
3972                 $dirprefix .= "/" if defined $dirprefix;
3973                 $dirprefix .= $part;
3974                 print $cgi->a({-href => href(project => undef,
3975                                              project_filter => $dirprefix,
3976                                              action => "project_list")},
3977                               esc_html($part)) . " / ";
3978         }
3979 }
3980
3981 sub print_nav_breadcrumbs {
3982         my %opts = @_;
3983
3984         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3985         if (defined $project) {
3986                 my @dirname = split '/', $project;
3987                 my $projectbasename = pop @dirname;
3988                 print_nav_breadcrumbs_path(@dirname);
3989                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
3990                 if (defined $action) {
3991                         my $action_print = $action ;
3992                         if (defined $opts{-action_extra}) {
3993                                 $action_print = $cgi->a({-href => href(action=>$action)},
3994                                         $action);
3995                         }
3996                         print " / $action_print";
3997                 }
3998                 if (defined $opts{-action_extra}) {
3999                         print " / $opts{-action_extra}";
4000                 }
4001                 print "\n";
4002         } elsif (defined $project_filter) {
4003                 print_nav_breadcrumbs_path(split '/', $project_filter);
4004         }
4005 }
4006
4007 sub print_search_form {
4008         if (!defined $searchtext) {
4009                 $searchtext = "";
4010         }
4011         my $search_hash;
4012         if (defined $hash_base) {
4013                 $search_hash = $hash_base;
4014         } elsif (defined $hash) {
4015                 $search_hash = $hash;
4016         } else {
4017                 $search_hash = "HEAD";
4018         }
4019         my $action = $my_uri;
4020         my $use_pathinfo = gitweb_check_feature('pathinfo');
4021         if ($use_pathinfo) {
4022                 $action .= "/".esc_url($project);
4023         }
4024         print $cgi->startform(-method => "get", -action => $action) .
4025               "<div class=\"search\">\n" .
4026               (!$use_pathinfo &&
4027               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4028               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4029               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4030               $cgi->popup_menu(-name => 'st', -default => 'commit',
4031                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4032               $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
4033               " search:\n",
4034               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4035               "<span title=\"Extended regular expression\">" .
4036               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4037                              -checked => $search_use_regexp) .
4038               "</span>" .
4039               "</div>" .
4040               $cgi->end_form() . "\n";
4041 }
4042
4043 sub git_header_html {
4044         my $status = shift || "200 OK";
4045         my $expires = shift;
4046         my %opts = @_;
4047
4048         my $title = get_page_title();
4049         my $content_type = get_content_type_html();
4050         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4051                            -status=> $status, -expires => $expires)
4052                 unless ($opts{'-no_http_header'});
4053         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4054         print <<EOF;
4055 <?xml version="1.0" encoding="utf-8"?>
4056 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4057 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4058 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4059 <!-- git core binaries version $git_version -->
4060 <head>
4061 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4062 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4063 <meta name="robots" content="index, nofollow"/>
4064 <title>$title</title>
4065 EOF
4066         # the stylesheet, favicon etc urls won't work correctly with path_info
4067         # unless we set the appropriate base URL
4068         if ($ENV{'PATH_INFO'}) {
4069                 print "<base href=\"".esc_url($base_url)."\" />\n";
4070         }
4071         print_header_links($status);
4072
4073         if (defined $site_html_head_string) {
4074                 print to_utf8($site_html_head_string);
4075         }
4076
4077         print "</head>\n" .
4078               "<body>\n";
4079
4080         if (defined $site_header && -f $site_header) {
4081                 insert_file($site_header);
4082         }
4083
4084         print "<div class=\"page_header\">\n";
4085         if (defined $logo) {
4086                 print $cgi->a({-href => esc_url($logo_url),
4087                                -title => $logo_label},
4088                               $cgi->img({-src => esc_url($logo),
4089                                          -width => 72, -height => 27,
4090                                          -alt => "git",
4091                                          -class => "logo"}));
4092         }
4093         print_nav_breadcrumbs(%opts);
4094         print "</div>\n";
4095
4096         my $have_search = gitweb_check_feature('search');
4097         if (defined $project && $have_search) {
4098                 print_search_form();
4099         }
4100 }
4101
4102 sub git_footer_html {
4103         my $feed_class = 'rss_logo';
4104
4105         print "<div class=\"page_footer\">\n";
4106         if (defined $project) {
4107                 my $descr = git_get_project_description($project);
4108                 if (defined $descr) {
4109                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4110                 }
4111
4112                 my %href_params = get_feed_info();
4113                 if (!%href_params) {
4114                         $feed_class .= ' generic';
4115                 }
4116                 $href_params{'-title'} ||= 'log';
4117
4118                 foreach my $format (qw(RSS Atom)) {
4119                         $href_params{'action'} = lc($format);
4120                         print $cgi->a({-href => href(%href_params),
4121                                       -title => "$href_params{'-title'} $format feed",
4122                                       -class => $feed_class}, $format)."\n";
4123                 }
4124
4125         } else {
4126                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4127                                              project_filter => $project_filter),
4128                               -class => $feed_class}, "OPML") . " ";
4129                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4130                                              project_filter => $project_filter),
4131                               -class => $feed_class}, "TXT") . "\n";
4132         }
4133         print "</div>\n"; # class="page_footer"
4134
4135         if (defined $t0 && gitweb_check_feature('timed')) {
4136                 print "<div id=\"generating_info\">\n";
4137                 print 'This page took '.
4138                       '<span id="generating_time" class="time_span">'.
4139                       tv_interval($t0, [ gettimeofday() ]).
4140                       ' seconds </span>'.
4141                       ' and '.
4142                       '<span id="generating_cmd">'.
4143                       $number_of_git_cmds.
4144                       '</span> git commands '.
4145                       " to generate.\n";
4146                 print "</div>\n"; # class="page_footer"
4147         }
4148
4149         if (defined $site_footer && -f $site_footer) {
4150                 insert_file($site_footer);
4151         }
4152
4153         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4154         if (defined $action &&
4155             $action eq 'blame_incremental') {
4156                 print qq!<script type="text/javascript">\n!.
4157                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4158                       qq!           "!. href() .qq!");\n!.
4159                       qq!</script>\n!;
4160         } else {
4161                 my ($jstimezone, $tz_cookie, $datetime_class) =
4162                         gitweb_get_feature('javascript-timezone');
4163
4164                 print qq!<script type="text/javascript">\n!.
4165                       qq!window.onload = function () {\n!;
4166                 if (gitweb_check_feature('javascript-actions')) {
4167                         print qq!       fixLinks();\n!;
4168                 }
4169                 if ($jstimezone && $tz_cookie && $datetime_class) {
4170                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4171                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4172                 }
4173                 print qq!};\n!.
4174                       qq!</script>\n!;
4175         }
4176
4177         print "</body>\n" .
4178               "</html>";
4179 }
4180
4181 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4182 # Example: die_error(404, 'Hash not found')
4183 # By convention, use the following status codes (as defined in RFC 2616):
4184 # 400: Invalid or missing CGI parameters, or
4185 #      requested object exists but has wrong type.
4186 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4187 #      this server or project.
4188 # 404: Requested object/revision/project doesn't exist.
4189 # 500: The server isn't configured properly, or
4190 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4191 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4192 # 503: The server is currently unavailable (because it is overloaded,
4193 #      or down for maintenance).  Generally, this is a temporary state.
4194 sub die_error {
4195         my $status = shift || 500;
4196         my $error = esc_html(shift) || "Internal Server Error";
4197         my $extra = shift;
4198         my %opts = @_;
4199
4200         my %http_responses = (
4201                 400 => '400 Bad Request',
4202                 403 => '403 Forbidden',
4203                 404 => '404 Not Found',
4204                 500 => '500 Internal Server Error',
4205                 503 => '503 Service Unavailable',
4206         );
4207         git_header_html($http_responses{$status}, undef, %opts);
4208         print <<EOF;
4209 <div class="page_body">
4210 <br /><br />
4211 $status - $error
4212 <br />
4213 EOF
4214         if (defined $extra) {
4215                 print "<hr />\n" .
4216                       "$extra\n";
4217         }
4218         print "</div>\n";
4219
4220         git_footer_html();
4221         goto DONE_GITWEB
4222                 unless ($opts{'-error_handler'});
4223 }
4224
4225 ## ----------------------------------------------------------------------
4226 ## functions printing or outputting HTML: navigation
4227
4228 sub git_print_page_nav {
4229         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4230         $extra = '' if !defined $extra; # pager or formats
4231
4232         my @navs = qw(summary shortlog log commit commitdiff tree);
4233         if ($suppress) {
4234                 @navs = grep { $_ ne $suppress } @navs;
4235         }
4236
4237         my %arg = map { $_ => {action=>$_} } @navs;
4238         if (defined $head) {
4239                 for (qw(commit commitdiff)) {
4240                         $arg{$_}{'hash'} = $head;
4241                 }
4242                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4243                         for (qw(shortlog log)) {
4244                                 $arg{$_}{'hash'} = $head;
4245                         }
4246                 }
4247         }
4248
4249         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4250         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4251
4252         my @actions = gitweb_get_feature('actions');
4253         my %repl = (
4254                 '%' => '%',
4255                 'n' => $project,         # project name
4256                 'f' => $git_dir,         # project path within filesystem
4257                 'h' => $treehead || '',  # current hash ('h' parameter)
4258                 'b' => $treebase || '',  # hash base ('hb' parameter)
4259         );
4260         while (@actions) {
4261                 my ($label, $link, $pos) = splice(@actions,0,3);
4262                 # insert
4263                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4264                 # munch munch
4265                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4266                 $arg{$label}{'_href'} = $link;
4267         }
4268
4269         print "<div class=\"page_nav\">\n" .
4270                 (join " | ",
4271                  map { $_ eq $current ?
4272                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4273                  } @navs);
4274         print "<br/>\n$extra<br/>\n" .
4275               "</div>\n";
4276 }
4277
4278 # returns a submenu for the nagivation of the refs views (tags, heads,
4279 # remotes) with the current view disabled and the remotes view only
4280 # available if the feature is enabled
4281 sub format_ref_views {
4282         my ($current) = @_;
4283         my @ref_views = qw{tags heads};
4284         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4285         return join " | ", map {
4286                 $_ eq $current ? $_ :
4287                 $cgi->a({-href => href(action=>$_)}, $_)
4288         } @ref_views
4289 }
4290
4291 sub format_paging_nav {
4292         my ($action, $page, $has_next_link) = @_;
4293         my $paging_nav;
4294
4295
4296         if ($page > 0) {
4297                 $paging_nav .=
4298                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4299                         " &sdot; " .
4300                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4301                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4302         } else {
4303                 $paging_nav .= "first &sdot; prev";
4304         }
4305
4306         if ($has_next_link) {
4307                 $paging_nav .= " &sdot; " .
4308                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4309                                  -accesskey => "n", -title => "Alt-n"}, "next");
4310         } else {
4311                 $paging_nav .= " &sdot; next";
4312         }
4313
4314         return $paging_nav;
4315 }
4316
4317 ## ......................................................................
4318 ## functions printing or outputting HTML: div
4319
4320 sub git_print_header_div {
4321         my ($action, $title, $hash, $hash_base) = @_;
4322         my %args = ();
4323
4324         $args{'action'} = $action;
4325         $args{'hash'} = $hash if $hash;
4326         $args{'hash_base'} = $hash_base if $hash_base;
4327
4328         print "<div class=\"header\">\n" .
4329               $cgi->a({-href => href(%args), -class => "title"},
4330               $title ? $title : $action) .
4331               "\n</div>\n";
4332 }
4333
4334 sub format_repo_url {
4335         my ($name, $url) = @_;
4336         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4337 }
4338
4339 # Group output by placing it in a DIV element and adding a header.
4340 # Options for start_div() can be provided by passing a hash reference as the
4341 # first parameter to the function.
4342 # Options to git_print_header_div() can be provided by passing an array
4343 # reference. This must follow the options to start_div if they are present.
4344 # The content can be a scalar, which is output as-is, a scalar reference, which
4345 # is output after html escaping, an IO handle passed either as *handle or
4346 # *handle{IO}, or a function reference. In the latter case all following
4347 # parameters will be taken as argument to the content function call.
4348 sub git_print_section {
4349         my ($div_args, $header_args, $content);
4350         my $arg = shift;
4351         if (ref($arg) eq 'HASH') {
4352                 $div_args = $arg;
4353                 $arg = shift;
4354         }
4355         if (ref($arg) eq 'ARRAY') {
4356                 $header_args = $arg;
4357                 $arg = shift;
4358         }
4359         $content = $arg;
4360
4361         print $cgi->start_div($div_args);
4362         git_print_header_div(@$header_args);
4363
4364         if (ref($content) eq 'CODE') {
4365                 $content->(@_);
4366         } elsif (ref($content) eq 'SCALAR') {
4367                 print esc_html($$content);
4368         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4369                 print <$content>;
4370         } elsif (!ref($content) && defined($content)) {
4371                 print $content;
4372         }
4373
4374         print $cgi->end_div;
4375 }
4376
4377 sub format_timestamp_html {
4378         my $date = shift;
4379         my $strtime = $date->{'rfc2822'};
4380
4381         my (undef, undef, $datetime_class) =
4382                 gitweb_get_feature('javascript-timezone');
4383         if ($datetime_class) {
4384                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4385         }
4386
4387         my $localtime_format = '(%02d:%02d %s)';
4388         if ($date->{'hour_local'} < 6) {
4389                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4390         }
4391         $strtime .= ' ' .
4392                     sprintf($localtime_format,
4393                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4394
4395         return $strtime;
4396 }
4397
4398 # Outputs the author name and date in long form
4399 sub git_print_authorship {
4400         my $co = shift;
4401         my %opts = @_;
4402         my $tag = $opts{-tag} || 'div';
4403         my $author = $co->{'author_name'};
4404
4405         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4406         print "<$tag class=\"author_date\">" .
4407               format_search_author($author, "author", esc_html($author)) .
4408               " [".format_timestamp_html(\%ad)."]".
4409               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4410               "</$tag>\n";
4411 }
4412
4413 # Outputs table rows containing the full author or committer information,
4414 # in the format expected for 'commit' view (& similar).
4415 # Parameters are a commit hash reference, followed by the list of people
4416 # to output information for. If the list is empty it defaults to both
4417 # author and committer.
4418 sub git_print_authorship_rows {
4419         my $co = shift;
4420         # too bad we can't use @people = @_ || ('author', 'committer')
4421         my @people = @_;
4422         @people = ('author', 'committer') unless @people;
4423         foreach my $who (@people) {
4424                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4425                 print "<tr><td>$who</td><td>" .
4426                       format_search_author($co->{"${who}_name"}, $who,
4427                                            esc_html($co->{"${who}_name"})) . " " .
4428                       format_search_author($co->{"${who}_email"}, $who,
4429                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4430                       "</td><td rowspan=\"2\">" .
4431                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4432                       "</td></tr>\n" .
4433                       "<tr>" .
4434                       "<td></td><td>" .
4435                       format_timestamp_html(\%wd) .
4436                       "</td>" .
4437                       "</tr>\n";
4438         }
4439 }
4440
4441 sub git_print_page_path {
4442         my $name = shift;
4443         my $type = shift;
4444         my $hb = shift;
4445
4446
4447         print "<div class=\"page_path\">";
4448         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4449                       -title => 'tree root'}, to_utf8("[$project]"));
4450         print " / ";
4451         if (defined $name) {
4452                 my @dirname = split '/', $name;
4453                 my $basename = pop @dirname;
4454                 my $fullname = '';
4455
4456                 foreach my $dir (@dirname) {
4457                         $fullname .= ($fullname ? '/' : '') . $dir;
4458                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4459                                                      hash_base=>$hb),
4460                                       -title => $fullname}, esc_path($dir));
4461                         print " / ";
4462                 }
4463                 if (defined $type && $type eq 'blob') {
4464                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4465                                                      hash_base=>$hb),
4466                                       -title => $name}, esc_path($basename));
4467                 } elsif (defined $type && $type eq 'tree') {
4468                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4469                                                      hash_base=>$hb),
4470                                       -title => $name}, esc_path($basename));
4471                         print " / ";
4472                 } else {
4473                         print esc_path($basename);
4474                 }
4475         }
4476         print "<br/></div>\n";
4477 }
4478
4479 sub git_print_log {
4480         my $log = shift;
4481         my %opts = @_;
4482
4483         if ($opts{'-remove_title'}) {
4484                 # remove title, i.e. first line of log
4485                 shift @$log;
4486         }
4487         # remove leading empty lines
4488         while (defined $log->[0] && $log->[0] eq "") {
4489                 shift @$log;
4490         }
4491
4492         # print log
4493         my $skip_blank_line = 0;
4494         foreach my $line (@$log) {
4495                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4496                         if (! $opts{'-remove_signoff'}) {
4497                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4498                                 $skip_blank_line = 1;
4499                         }
4500                         next;
4501                 }
4502
4503                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4504                         if (! $opts{'-remove_signoff'}) {
4505                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4506                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4507                                         "</span><br/>\n";
4508                                 $skip_blank_line = 1;
4509                         }
4510                         next;
4511                 }
4512
4513                 # print only one empty line
4514                 # do not print empty line after signoff
4515                 if ($line eq "") {
4516                         next if ($skip_blank_line);
4517                         $skip_blank_line = 1;
4518                 } else {
4519                         $skip_blank_line = 0;
4520                 }
4521
4522                 print format_log_line_html($line) . "<br/>\n";
4523         }
4524
4525         if ($opts{'-final_empty_line'}) {
4526                 # end with single empty line
4527                 print "<br/>\n" unless $skip_blank_line;
4528         }
4529 }
4530
4531 # return link target (what link points to)
4532 sub git_get_link_target {
4533         my $hash = shift;
4534         my $link_target;
4535
4536         # read link
4537         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4538                 or return;
4539         {
4540                 local $/ = undef;
4541                 $link_target = <$fd>;
4542         }
4543         close $fd
4544                 or return;
4545
4546         return $link_target;
4547 }
4548
4549 # given link target, and the directory (basedir) the link is in,
4550 # return target of link relative to top directory (top tree);
4551 # return undef if it is not possible (including absolute links).
4552 sub normalize_link_target {
4553         my ($link_target, $basedir) = @_;
4554
4555         # absolute symlinks (beginning with '/') cannot be normalized
4556         return if (substr($link_target, 0, 1) eq '/');
4557
4558         # normalize link target to path from top (root) tree (dir)
4559         my $path;
4560         if ($basedir) {
4561                 $path = $basedir . '/' . $link_target;
4562         } else {
4563                 # we are in top (root) tree (dir)
4564                 $path = $link_target;
4565         }
4566
4567         # remove //, /./, and /../
4568         my @path_parts;
4569         foreach my $part (split('/', $path)) {
4570                 # discard '.' and ''
4571                 next if (!$part || $part eq '.');
4572                 # handle '..'
4573                 if ($part eq '..') {
4574                         if (@path_parts) {
4575                                 pop @path_parts;
4576                         } else {
4577                                 # link leads outside repository (outside top dir)
4578                                 return;
4579                         }
4580                 } else {
4581                         push @path_parts, $part;
4582                 }
4583         }
4584         $path = join('/', @path_parts);
4585
4586         return $path;
4587 }
4588
4589 # print tree entry (row of git_tree), but without encompassing <tr> element
4590 sub git_print_tree_entry {
4591         my ($t, $basedir, $hash_base, $have_blame) = @_;
4592
4593         my %base_key = ();
4594         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4595
4596         # The format of a table row is: mode list link.  Where mode is
4597         # the mode of the entry, list is the name of the entry, an href,
4598         # and link is the action links of the entry.
4599
4600         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4601         if (exists $t->{'size'}) {
4602                 print "<td class=\"size\">$t->{'size'}</td>\n";
4603         }
4604         if ($t->{'type'} eq "blob") {
4605                 print "<td class=\"list\">" .
4606                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4607                                                file_name=>"$basedir$t->{'name'}", %base_key),
4608                                 -class => "list"}, esc_path($t->{'name'}));
4609                 if (S_ISLNK(oct $t->{'mode'})) {
4610                         my $link_target = git_get_link_target($t->{'hash'});
4611                         if ($link_target) {
4612                                 my $norm_target = normalize_link_target($link_target, $basedir);
4613                                 if (defined $norm_target) {
4614                                         print " -> " .
4615                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4616                                                                      file_name=>$norm_target),
4617                                                        -title => $norm_target}, esc_path($link_target));
4618                                 } else {
4619                                         print " -> " . esc_path($link_target);
4620                                 }
4621                         }
4622                 }
4623                 print "</td>\n";
4624                 print "<td class=\"link\">";
4625                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4626                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4627                               "blob");
4628                 if ($have_blame) {
4629                         print " | " .
4630                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4631                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4632                                       "blame");
4633                 }
4634                 if (defined $hash_base) {
4635                         print " | " .
4636                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4637                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4638                                       "history");
4639                 }
4640                 print " | " .
4641                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4642                                                file_name=>"$basedir$t->{'name'}")},
4643                                 "raw");
4644                 print "</td>\n";
4645
4646         } elsif ($t->{'type'} eq "tree") {
4647                 print "<td class=\"list\">";
4648                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4649                                              file_name=>"$basedir$t->{'name'}",
4650                                              %base_key)},
4651                               esc_path($t->{'name'}));
4652                 print "</td>\n";
4653                 print "<td class=\"link\">";
4654                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4655                                              file_name=>"$basedir$t->{'name'}",
4656                                              %base_key)},
4657                               "tree");
4658                 if (defined $hash_base) {
4659                         print " | " .
4660                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4661                                                      file_name=>"$basedir$t->{'name'}")},
4662                                       "history");
4663                 }
4664                 print "</td>\n";
4665         } else {
4666                 # unknown object: we can only present history for it
4667                 # (this includes 'commit' object, i.e. submodule support)
4668                 print "<td class=\"list\">" .
4669                       esc_path($t->{'name'}) .
4670                       "</td>\n";
4671                 print "<td class=\"link\">";
4672                 if (defined $hash_base) {
4673                         print $cgi->a({-href => href(action=>"history",
4674                                                      hash_base=>$hash_base,
4675                                                      file_name=>"$basedir$t->{'name'}")},
4676                                       "history");
4677                 }
4678                 print "</td>\n";
4679         }
4680 }
4681
4682 ## ......................................................................
4683 ## functions printing large fragments of HTML
4684
4685 # get pre-image filenames for merge (combined) diff
4686 sub fill_from_file_info {
4687         my ($diff, @parents) = @_;
4688
4689         $diff->{'from_file'} = [ ];
4690         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4691         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4692                 if ($diff->{'status'}[$i] eq 'R' ||
4693                     $diff->{'status'}[$i] eq 'C') {
4694                         $diff->{'from_file'}[$i] =
4695                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4696                 }
4697         }
4698
4699         return $diff;
4700 }
4701
4702 # is current raw difftree line of file deletion
4703 sub is_deleted {
4704         my $diffinfo = shift;
4705
4706         return $diffinfo->{'to_id'} eq ('0' x 40);
4707 }
4708
4709 # does patch correspond to [previous] difftree raw line
4710 # $diffinfo  - hashref of parsed raw diff format
4711 # $patchinfo - hashref of parsed patch diff format
4712 #              (the same keys as in $diffinfo)
4713 sub is_patch_split {
4714         my ($diffinfo, $patchinfo) = @_;
4715
4716         return defined $diffinfo && defined $patchinfo
4717                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4718 }
4719
4720
4721 sub git_difftree_body {
4722         my ($difftree, $hash, @parents) = @_;
4723         my ($parent) = $parents[0];
4724         my $have_blame = gitweb_check_feature('blame');
4725         print "<div class=\"list_head\">\n";
4726         if ($#{$difftree} > 10) {
4727                 print(($#{$difftree} + 1) . " files changed:\n");
4728         }
4729         print "</div>\n";
4730
4731         print "<table class=\"" .
4732               (@parents > 1 ? "combined " : "") .
4733               "diff_tree\">\n";
4734
4735         # header only for combined diff in 'commitdiff' view
4736         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4737         if ($has_header) {
4738                 # table header
4739                 print "<thead><tr>\n" .
4740                        "<th></th><th></th>\n"; # filename, patchN link
4741                 for (my $i = 0; $i < @parents; $i++) {
4742                         my $par = $parents[$i];
4743                         print "<th>" .
4744                               $cgi->a({-href => href(action=>"commitdiff",
4745                                                      hash=>$hash, hash_parent=>$par),
4746                                        -title => 'commitdiff to parent number ' .
4747                                                   ($i+1) . ': ' . substr($par,0,7)},
4748                                       $i+1) .
4749                               "&nbsp;</th>\n";
4750                 }
4751                 print "</tr></thead>\n<tbody>\n";
4752         }
4753
4754         my $alternate = 1;
4755         my $patchno = 0;
4756         foreach my $line (@{$difftree}) {
4757                 my $diff = parsed_difftree_line($line);
4758
4759                 if ($alternate) {
4760                         print "<tr class=\"dark\">\n";
4761                 } else {
4762                         print "<tr class=\"light\">\n";
4763                 }
4764                 $alternate ^= 1;
4765
4766                 if (exists $diff->{'nparents'}) { # combined diff
4767
4768                         fill_from_file_info($diff, @parents)
4769                                 unless exists $diff->{'from_file'};
4770
4771                         if (!is_deleted($diff)) {
4772                                 # file exists in the result (child) commit
4773                                 print "<td>" .
4774                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4775                                                              file_name=>$diff->{'to_file'},
4776                                                              hash_base=>$hash),
4777                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4778                                       "</td>\n";
4779                         } else {
4780                                 print "<td>" .
4781                                       esc_path($diff->{'to_file'}) .
4782                                       "</td>\n";
4783                         }
4784
4785                         if ($action eq 'commitdiff') {
4786                                 # link to patch
4787                                 $patchno++;
4788                                 print "<td class=\"link\">" .
4789                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4790                                               "patch") .
4791                                       " | " .
4792                                       "</td>\n";
4793                         }
4794
4795                         my $has_history = 0;
4796                         my $not_deleted = 0;
4797                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4798                                 my $hash_parent = $parents[$i];
4799                                 my $from_hash = $diff->{'from_id'}[$i];
4800                                 my $from_path = $diff->{'from_file'}[$i];
4801                                 my $status = $diff->{'status'}[$i];
4802
4803                                 $has_history ||= ($status ne 'A');
4804                                 $not_deleted ||= ($status ne 'D');
4805
4806                                 if ($status eq 'A') {
4807                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4808                                 } elsif ($status eq 'D') {
4809                                         print "<td class=\"link\">" .
4810                                               $cgi->a({-href => href(action=>"blob",
4811                                                                      hash_base=>$hash,
4812                                                                      hash=>$from_hash,
4813                                                                      file_name=>$from_path)},
4814                                                       "blob" . ($i+1)) .
4815                                               " | </td>\n";
4816                                 } else {
4817                                         if ($diff->{'to_id'} eq $from_hash) {
4818                                                 print "<td class=\"link nochange\">";
4819                                         } else {
4820                                                 print "<td class=\"link\">";
4821                                         }
4822                                         print $cgi->a({-href => href(action=>"blobdiff",
4823                                                                      hash=>$diff->{'to_id'},
4824                                                                      hash_parent=>$from_hash,
4825                                                                      hash_base=>$hash,
4826                                                                      hash_parent_base=>$hash_parent,
4827                                                                      file_name=>$diff->{'to_file'},
4828                                                                      file_parent=>$from_path)},
4829                                                       "diff" . ($i+1)) .
4830                                               " | </td>\n";
4831                                 }
4832                         }
4833
4834                         print "<td class=\"link\">";
4835                         if ($not_deleted) {
4836                                 print $cgi->a({-href => href(action=>"blob",
4837                                                              hash=>$diff->{'to_id'},
4838                                                              file_name=>$diff->{'to_file'},
4839                                                              hash_base=>$hash)},
4840                                               "blob");
4841                                 print " | " if ($has_history);
4842                         }
4843                         if ($has_history) {
4844                                 print $cgi->a({-href => href(action=>"history",
4845                                                              file_name=>$diff->{'to_file'},
4846                                                              hash_base=>$hash)},
4847                                               "history");
4848                         }
4849                         print "</td>\n";
4850
4851                         print "</tr>\n";
4852                         next; # instead of 'else' clause, to avoid extra indent
4853                 }
4854                 # else ordinary diff
4855
4856                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4857                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4858                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4859                         $to_mode_oct = oct $diff->{'to_mode'};
4860                         if (S_ISREG($to_mode_oct)) { # only for regular file
4861                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4862                         }
4863                         $to_file_type = file_type($diff->{'to_mode'});
4864                 }
4865                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4866                         $from_mode_oct = oct $diff->{'from_mode'};
4867                         if (S_ISREG($from_mode_oct)) { # only for regular file
4868                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4869                         }
4870                         $from_file_type = file_type($diff->{'from_mode'});
4871                 }
4872
4873                 if ($diff->{'status'} eq "A") { # created
4874                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4875                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4876                         $mode_chng   .= "]</span>";
4877                         print "<td>";
4878                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4879                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4880                                       -class => "list"}, esc_path($diff->{'file'}));
4881                         print "</td>\n";
4882                         print "<td>$mode_chng</td>\n";
4883                         print "<td class=\"link\">";
4884                         if ($action eq 'commitdiff') {
4885                                 # link to patch
4886                                 $patchno++;
4887                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4888                                               "patch") .
4889                                       " | ";
4890                         }
4891                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4892                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4893                                       "blob");
4894                         print "</td>\n";
4895
4896                 } elsif ($diff->{'status'} eq "D") { # deleted
4897                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4898                         print "<td>";
4899                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4900                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4901                                        -class => "list"}, esc_path($diff->{'file'}));
4902                         print "</td>\n";
4903                         print "<td>$mode_chng</td>\n";
4904                         print "<td class=\"link\">";
4905                         if ($action eq 'commitdiff') {
4906                                 # link to patch
4907                                 $patchno++;
4908                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4909                                               "patch") .
4910                                       " | ";
4911                         }
4912                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4913                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4914                                       "blob") . " | ";
4915                         if ($have_blame) {
4916                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4917                                                              file_name=>$diff->{'file'})},
4918                                               "blame") . " | ";
4919                         }
4920                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4921                                                      file_name=>$diff->{'file'})},
4922                                       "history");
4923                         print "</td>\n";
4924
4925                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4926                         my $mode_chnge = "";
4927                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4928                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4929                                 if ($from_file_type ne $to_file_type) {
4930                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4931                                 }
4932                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4933                                         if ($from_mode_str && $to_mode_str) {
4934                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4935                                         } elsif ($to_mode_str) {
4936                                                 $mode_chnge .= " mode: $to_mode_str";
4937                                         }
4938                                 }
4939                                 $mode_chnge .= "]</span>\n";
4940                         }
4941                         print "<td>";
4942                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4943                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4944                                       -class => "list"}, esc_path($diff->{'file'}));
4945                         print "</td>\n";
4946                         print "<td>$mode_chnge</td>\n";
4947                         print "<td class=\"link\">";
4948                         if ($action eq 'commitdiff') {
4949                                 # link to patch
4950                                 $patchno++;
4951                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4952                                               "patch") .
4953                                       " | ";
4954                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4955                                 # "commit" view and modified file (not onlu mode changed)
4956                                 print $cgi->a({-href => href(action=>"blobdiff",
4957                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4958                                                              hash_base=>$hash, hash_parent_base=>$parent,
4959                                                              file_name=>$diff->{'file'})},
4960                                               "diff") .
4961                                       " | ";
4962                         }
4963                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4964                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4965                                        "blob") . " | ";
4966                         if ($have_blame) {
4967                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4968                                                              file_name=>$diff->{'file'})},
4969                                               "blame") . " | ";
4970                         }
4971                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4972                                                      file_name=>$diff->{'file'})},
4973                                       "history");
4974                         print "</td>\n";
4975
4976                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4977                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4978                         my $nstatus = $status_name{$diff->{'status'}};
4979                         my $mode_chng = "";
4980                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4981                                 # mode also for directories, so we cannot use $to_mode_str
4982                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4983                         }
4984                         print "<td>" .
4985                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4986                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4987                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4988                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4989                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4990                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4991                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4992                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4993                               "<td class=\"link\">";
4994                         if ($action eq 'commitdiff') {
4995                                 # link to patch
4996                                 $patchno++;
4997                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4998                                               "patch") .
4999                                       " | ";
5000                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5001                                 # "commit" view and modified file (not only pure rename or copy)
5002                                 print $cgi->a({-href => href(action=>"blobdiff",
5003                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5004                                                              hash_base=>$hash, hash_parent_base=>$parent,
5005                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5006                                               "diff") .
5007                                       " | ";
5008                         }
5009                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5010                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5011                                       "blob") . " | ";
5012                         if ($have_blame) {
5013                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5014                                                              file_name=>$diff->{'to_file'})},
5015                                               "blame") . " | ";
5016                         }
5017                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5018                                                     file_name=>$diff->{'to_file'})},
5019                                       "history");
5020                         print "</td>\n";
5021
5022                 } # we should not encounter Unmerged (U) or Unknown (X) status
5023                 print "</tr>\n";
5024         }
5025         print "</tbody>" if $has_header;
5026         print "</table>\n";
5027 }
5028
5029 # Print context lines and then rem/add lines in a side-by-side manner.
5030 sub print_sidebyside_diff_lines {
5031         my ($ctx, $rem, $add) = @_;
5032
5033         # print context block before add/rem block
5034         if (@$ctx) {
5035                 print join '',
5036                         '<div class="chunk_block ctx">',
5037                                 '<div class="old">',
5038                                 @$ctx,
5039                                 '</div>',
5040                                 '<div class="new">',
5041                                 @$ctx,
5042                                 '</div>',
5043                         '</div>';
5044         }
5045
5046         if (!@$add) {
5047                 # pure removal
5048                 print join '',
5049                         '<div class="chunk_block rem">',
5050                                 '<div class="old">',
5051                                 @$rem,
5052                                 '</div>',
5053                         '</div>';
5054         } elsif (!@$rem) {
5055                 # pure addition
5056                 print join '',
5057                         '<div class="chunk_block add">',
5058                                 '<div class="new">',
5059                                 @$add,
5060                                 '</div>',
5061                         '</div>';
5062         } else {
5063                 print join '',
5064                         '<div class="chunk_block chg">',
5065                                 '<div class="old">',
5066                                 @$rem,
5067                                 '</div>',
5068                                 '<div class="new">',
5069                                 @$add,
5070                                 '</div>',
5071                         '</div>';
5072         }
5073 }
5074
5075 # Print context lines and then rem/add lines in inline manner.
5076 sub print_inline_diff_lines {
5077         my ($ctx, $rem, $add) = @_;
5078
5079         print @$ctx, @$rem, @$add;
5080 }
5081
5082 # Format removed and added line, mark changed part and HTML-format them.
5083 # Implementation is based on contrib/diff-highlight
5084 sub format_rem_add_lines_pair {
5085         my ($rem, $add, $num_parents) = @_;
5086
5087         # We need to untabify lines before split()'ing them;
5088         # otherwise offsets would be invalid.
5089         chomp $rem;
5090         chomp $add;
5091         $rem = untabify($rem);
5092         $add = untabify($add);
5093
5094         my @rem = split(//, $rem);
5095         my @add = split(//, $add);
5096         my ($esc_rem, $esc_add);
5097         # Ignore leading +/- characters for each parent.
5098         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5099         my ($prefix_has_nonspace, $suffix_has_nonspace);
5100
5101         my $shorter = (@rem < @add) ? @rem : @add;
5102         while ($prefix_len < $shorter) {
5103                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5104
5105                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5106                 $prefix_len++;
5107         }
5108
5109         while ($prefix_len + $suffix_len < $shorter) {
5110                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5111
5112                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5113                 $suffix_len++;
5114         }
5115
5116         # Mark lines that are different from each other, but have some common
5117         # part that isn't whitespace.  If lines are completely different, don't
5118         # mark them because that would make output unreadable, especially if
5119         # diff consists of multiple lines.
5120         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5121                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5122                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5123                 $esc_add = esc_html_hl_regions($add, 'marked',
5124                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5125         } else {
5126                 $esc_rem = esc_html($rem, -nbsp=>1);
5127                 $esc_add = esc_html($add, -nbsp=>1);
5128         }
5129
5130         return format_diff_line(\$esc_rem, 'rem'),
5131                format_diff_line(\$esc_add, 'add');
5132 }
5133
5134 # HTML-format diff context, removed and added lines.
5135 sub format_ctx_rem_add_lines {
5136         my ($ctx, $rem, $add, $num_parents) = @_;
5137         my (@new_ctx, @new_rem, @new_add);
5138         my $can_highlight = 0;
5139         my $is_combined = ($num_parents > 1);
5140
5141         # Highlight if every removed line has a corresponding added line.
5142         if (@$add > 0 && @$add == @$rem) {
5143                 $can_highlight = 1;
5144
5145                 # Highlight lines in combined diff only if the chunk contains
5146                 # diff between the same version, e.g.
5147                 #
5148                 #    - a
5149                 #   -  b
5150                 #    + c
5151                 #   +  d
5152                 #
5153                 # Otherwise the highlightling would be confusing.
5154                 if ($is_combined) {
5155                         for (my $i = 0; $i < @$add; $i++) {
5156                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5157                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5158
5159                                 $prefix_rem =~ s/-/+/g;
5160
5161                                 if ($prefix_rem ne $prefix_add) {
5162                                         $can_highlight = 0;
5163                                         last;
5164                                 }
5165                         }
5166                 }
5167         }
5168
5169         if ($can_highlight) {
5170                 for (my $i = 0; $i < @$add; $i++) {
5171                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5172                                 $rem->[$i], $add->[$i], $num_parents);
5173                         push @new_rem, $line_rem;
5174                         push @new_add, $line_add;
5175                 }
5176         } else {
5177                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5178                 @new_add = map { format_diff_line($_, 'add') } @$add;
5179         }
5180
5181         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5182
5183         return (\@new_ctx, \@new_rem, \@new_add);
5184 }
5185
5186 # Print context lines and then rem/add lines.
5187 sub print_diff_lines {
5188         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5189         my $is_combined = $num_parents > 1;
5190
5191         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5192                 $num_parents);
5193
5194         if ($diff_style eq 'sidebyside' && !$is_combined) {
5195                 print_sidebyside_diff_lines($ctx, $rem, $add);
5196         } else {
5197                 # default 'inline' style and unknown styles
5198                 print_inline_diff_lines($ctx, $rem, $add);
5199         }
5200 }
5201
5202 sub print_diff_chunk {
5203         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5204         my (@ctx, @rem, @add);
5205
5206         # The class of the previous line.
5207         my $prev_class = '';
5208
5209         return unless @chunk;
5210
5211         # incomplete last line might be among removed or added lines,
5212         # or both, or among context lines: find which
5213         for (my $i = 1; $i < @chunk; $i++) {
5214                 if ($chunk[$i][0] eq 'incomplete') {
5215                         $chunk[$i][0] = $chunk[$i-1][0];
5216                 }
5217         }
5218
5219         # guardian
5220         push @chunk, ["", ""];
5221
5222         foreach my $line_info (@chunk) {
5223                 my ($class, $line) = @$line_info;
5224
5225                 # print chunk headers
5226                 if ($class && $class eq 'chunk_header') {
5227                         print format_diff_line($line, $class, $from, $to);
5228                         next;
5229                 }
5230
5231                 ## print from accumulator when have some add/rem lines or end
5232                 # of chunk (flush context lines), or when have add and rem
5233                 # lines and new block is reached (otherwise add/rem lines could
5234                 # be reordered)
5235                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5236                     (@rem && @add && $class ne $prev_class)) {
5237                         print_diff_lines(\@ctx, \@rem, \@add,
5238                                          $diff_style, $num_parents);
5239                         @ctx = @rem = @add = ();
5240                 }
5241
5242                 ## adding lines to accumulator
5243                 # guardian value
5244                 last unless $line;
5245                 # rem, add or change
5246                 if ($class eq 'rem') {
5247                         push @rem, $line;
5248                 } elsif ($class eq 'add') {
5249                         push @add, $line;
5250                 }
5251                 # context line
5252                 if ($class eq 'ctx') {
5253                         push @ctx, $line;
5254                 }
5255
5256                 $prev_class = $class;
5257         }
5258 }
5259
5260 sub git_patchset_body {
5261         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5262         my ($hash_parent) = $hash_parents[0];
5263
5264         my $is_combined = (@hash_parents > 1);
5265         my $patch_idx = 0;
5266         my $patch_number = 0;
5267         my $patch_line;
5268         my $diffinfo;
5269         my $to_name;
5270         my (%from, %to);
5271         my @chunk; # for side-by-side diff
5272
5273         print "<div class=\"patchset\">\n";
5274
5275         # skip to first patch
5276         while ($patch_line = <$fd>) {
5277                 chomp $patch_line;
5278
5279                 last if ($patch_line =~ m/^diff /);
5280         }
5281
5282  PATCH:
5283         while ($patch_line) {
5284
5285                 # parse "git diff" header line
5286                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5287                         # $1 is from_name, which we do not use
5288                         $to_name = unquote($2);
5289                         $to_name =~ s!^b/!!;
5290                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5291                         # $1 is 'cc' or 'combined', which we do not use
5292                         $to_name = unquote($2);
5293                 } else {
5294                         $to_name = undef;
5295                 }
5296
5297                 # check if current patch belong to current raw line
5298                 # and parse raw git-diff line if needed
5299                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5300                         # this is continuation of a split patch
5301                         print "<div class=\"patch cont\">\n";
5302                 } else {
5303                         # advance raw git-diff output if needed
5304                         $patch_idx++ if defined $diffinfo;
5305
5306                         # read and prepare patch information
5307                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5308
5309                         # compact combined diff output can have some patches skipped
5310                         # find which patch (using pathname of result) we are at now;
5311                         if ($is_combined) {
5312                                 while ($to_name ne $diffinfo->{'to_file'}) {
5313                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5314                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5315                                               "</div>\n";  # class="patch"
5316
5317                                         $patch_idx++;
5318                                         $patch_number++;
5319
5320                                         last if $patch_idx > $#$difftree;
5321                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5322                                 }
5323                         }
5324
5325                         # modifies %from, %to hashes
5326                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5327
5328                         # this is first patch for raw difftree line with $patch_idx index
5329                         # we index @$difftree array from 0, but number patches from 1
5330                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5331                 }
5332
5333                 # git diff header
5334                 #assert($patch_line =~ m/^diff /) if DEBUG;
5335                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5336                 $patch_number++;
5337                 # print "git diff" header
5338                 print format_git_diff_header_line($patch_line, $diffinfo,
5339                                                   \%from, \%to);
5340
5341                 # print extended diff header
5342                 print "<div class=\"diff extended_header\">\n";
5343         EXTENDED_HEADER:
5344                 while ($patch_line = <$fd>) {
5345                         chomp $patch_line;
5346
5347                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5348
5349                         print format_extended_diff_header_line($patch_line, $diffinfo,
5350                                                                \%from, \%to);
5351                 }
5352                 print "</div>\n"; # class="diff extended_header"
5353
5354                 # from-file/to-file diff header
5355                 if (! $patch_line) {
5356                         print "</div>\n"; # class="patch"
5357                         last PATCH;
5358                 }
5359                 next PATCH if ($patch_line =~ m/^diff /);
5360                 #assert($patch_line =~ m/^---/) if DEBUG;
5361
5362                 my $last_patch_line = $patch_line;
5363                 $patch_line = <$fd>;
5364                 chomp $patch_line;
5365                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5366
5367                 print format_diff_from_to_header($last_patch_line, $patch_line,
5368                                                  $diffinfo, \%from, \%to,
5369                                                  @hash_parents);
5370
5371                 # the patch itself
5372         LINE:
5373                 while ($patch_line = <$fd>) {
5374                         chomp $patch_line;
5375
5376                         next PATCH if ($patch_line =~ m/^diff /);
5377
5378                         my $class = diff_line_class($patch_line, \%from, \%to);
5379
5380                         if ($class eq 'chunk_header') {
5381                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5382                                 @chunk = ();
5383                         }
5384
5385                         push @chunk, [ $class, $patch_line ];
5386                 }
5387
5388         } continue {
5389                 if (@chunk) {
5390                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5391                         @chunk = ();
5392                 }
5393                 print "</div>\n"; # class="patch"
5394         }
5395
5396         # for compact combined (--cc) format, with chunk and patch simplification
5397         # the patchset might be empty, but there might be unprocessed raw lines
5398         for (++$patch_idx if $patch_number > 0;
5399              $patch_idx < @$difftree;
5400              ++$patch_idx) {
5401                 # read and prepare patch information
5402                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5403
5404                 # generate anchor for "patch" links in difftree / whatchanged part
5405                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5406                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5407                       "</div>\n";  # class="patch"
5408
5409                 $patch_number++;
5410         }
5411
5412         if ($patch_number == 0) {
5413                 if (@hash_parents > 1) {
5414                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5415                 } else {
5416                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5417                 }
5418         }
5419
5420         print "</div>\n"; # class="patchset"
5421 }
5422
5423 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5424
5425 sub git_project_search_form {
5426         my ($searchtext, $search_use_regexp) = @_;
5427
5428         my $limit = '';
5429         if ($project_filter) {
5430                 $limit = " in '$project_filter/'";
5431         }
5432
5433         print "<div class=\"projsearch\">\n";
5434         print $cgi->startform(-method => 'get', -action => $my_uri) .
5435               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5436         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5437                 if (defined $project_filter);
5438         print $cgi->textfield(-name => 's', -value => $searchtext,
5439                               -title => "Search project by name and description$limit",
5440                               -size => 60) . "\n" .
5441               "<span title=\"Extended regular expression\">" .
5442               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5443                              -checked => $search_use_regexp) .
5444               "</span>\n" .
5445               $cgi->submit(-name => 'btnS', -value => 'Search') .
5446               $cgi->end_form() . "\n" .
5447               $cgi->a({-href => href(project => undef, searchtext => undef,
5448                                      project_filter => $project_filter)},
5449                       esc_html("List all projects$limit")) . "<br />\n";
5450         print "</div>\n";
5451 }
5452
5453 # entry for given @keys needs filling if at least one of keys in list
5454 # is not present in %$project_info
5455 sub project_info_needs_filling {
5456         my ($project_info, @keys) = @_;
5457
5458         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5459         foreach my $key (@keys) {
5460                 if (!exists $project_info->{$key}) {
5461                         return 1;
5462                 }
5463         }
5464         return;
5465 }
5466
5467 # fills project list info (age, description, owner, category, forks, etc.)
5468 # for each project in the list, removing invalid projects from
5469 # returned list, or fill only specified info.
5470 #
5471 # Invalid projects are removed from the returned list if and only if you
5472 # ask 'age' or 'age_string' to be filled, because they are the only fields
5473 # that run unconditionally git command that requires repository, and
5474 # therefore do always check if project repository is invalid.
5475 #
5476 # USAGE:
5477 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5478 #   ensures that 'descr_long' and 'ctags' fields are filled
5479 # * @project_list = fill_project_list_info(\@project_list)
5480 #   ensures that all fields are filled (and invalid projects removed)
5481 #
5482 # NOTE: modifies $projlist, but does not remove entries from it
5483 sub fill_project_list_info {
5484         my ($projlist, @wanted_keys) = @_;
5485         my @projects;
5486         my $filter_set = sub { return @_; };
5487         if (@wanted_keys) {
5488                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5489                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5490         }
5491
5492         my $show_ctags = gitweb_check_feature('ctags');
5493  PROJECT:
5494         foreach my $pr (@$projlist) {
5495                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5496                         my (@activity) = git_get_last_activity($pr->{'path'});
5497                         unless (@activity) {
5498                                 next PROJECT;
5499                         }
5500                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5501                 }
5502                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5503                         my $descr = git_get_project_description($pr->{'path'}) || "";
5504                         $descr = to_utf8($descr);
5505                         $pr->{'descr_long'} = $descr;
5506                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5507                 }
5508                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5509                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5510                 }
5511                 if ($show_ctags &&
5512                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5513                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5514                 }
5515                 if ($projects_list_group_categories &&
5516                     project_info_needs_filling($pr, $filter_set->('category'))) {
5517                         my $cat = git_get_project_category($pr->{'path'}) ||
5518                                                            $project_list_default_category;
5519                         $pr->{'category'} = to_utf8($cat);
5520                 }
5521
5522                 push @projects, $pr;
5523         }
5524
5525         return @projects;
5526 }
5527
5528 sub sort_projects_list {
5529         my ($projlist, $order) = @_;
5530         my @projects;
5531
5532         my %order_info = (
5533                 project => { key => 'path', type => 'str' },
5534                 descr => { key => 'descr_long', type => 'str' },
5535                 owner => { key => 'owner', type => 'str' },
5536                 age => { key => 'age', type => 'num' }
5537         );
5538         my $oi = $order_info{$order};
5539         return @$projlist unless defined $oi;
5540         if ($oi->{'type'} eq 'str') {
5541                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @$projlist;
5542         } else {
5543                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @$projlist;
5544         }
5545
5546         return @projects;
5547 }
5548
5549 # returns a hash of categories, containing the list of project
5550 # belonging to each category
5551 sub build_projlist_by_category {
5552         my ($projlist, $from, $to) = @_;
5553         my %categories;
5554
5555         $from = 0 unless defined $from;
5556         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5557
5558         for (my $i = $from; $i <= $to; $i++) {
5559                 my $pr = $projlist->[$i];
5560                 push @{$categories{ $pr->{'category'} }}, $pr;
5561         }
5562
5563         return wantarray ? %categories : \%categories;
5564 }
5565
5566 # print 'sort by' <th> element, generating 'sort by $name' replay link
5567 # if that order is not selected
5568 sub print_sort_th {
5569         print format_sort_th(@_);
5570 }
5571
5572 sub format_sort_th {
5573         my ($name, $order, $header) = @_;
5574         my $sort_th = "";
5575         $header ||= ucfirst($name);
5576
5577         if ($order eq $name) {
5578                 $sort_th .= "<th>$header</th>\n";
5579         } else {
5580                 $sort_th .= "<th>" .
5581                             $cgi->a({-href => href(-replay=>1, order=>$name),
5582                                      -class => "header"}, $header) .
5583                             "</th>\n";
5584         }
5585
5586         return $sort_th;
5587 }
5588
5589 sub git_project_list_rows {
5590         my ($projlist, $from, $to, $check_forks) = @_;
5591
5592         $from = 0 unless defined $from;
5593         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5594
5595         my $alternate = 1;
5596         for (my $i = $from; $i <= $to; $i++) {
5597                 my $pr = $projlist->[$i];
5598
5599                 if ($alternate) {
5600                         print "<tr class=\"dark\">\n";
5601                 } else {
5602                         print "<tr class=\"light\">\n";
5603                 }
5604                 $alternate ^= 1;
5605
5606                 if ($check_forks) {
5607                         print "<td>";
5608                         if ($pr->{'forks'}) {
5609                                 my $nforks = scalar @{$pr->{'forks'}};
5610                                 if ($nforks > 0) {
5611                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5612                                                        -title => "$nforks forks"}, "+");
5613                                 } else {
5614                                         print $cgi->span({-title => "$nforks forks"}, "+");
5615                                 }
5616                         }
5617                         print "</td>\n";
5618                 }
5619                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5620                                         -class => "list"},
5621                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5622                       "</td>\n" .
5623                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5624                                         -class => "list",
5625                                         -title => $pr->{'descr_long'}},
5626                                         $search_regexp
5627                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5628                                                                     $pr->{'descr'}, $search_regexp)
5629                                         : esc_html($pr->{'descr'})) .
5630                       "</td>\n";
5631                 unless ($omit_owner) {
5632                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5633                 }
5634                 unless ($omit_age_column) {
5635                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5636                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5637                 }
5638                 print"<td class=\"link\">" .
5639                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5640                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5641                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5642                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5643                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5644                       "</td>\n" .
5645                       "</tr>\n";
5646         }
5647 }
5648
5649 sub git_project_list_body {
5650         # actually uses global variable $project
5651         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5652         my @projects = @$projlist;
5653
5654         my $check_forks = gitweb_check_feature('forks');
5655         my $show_ctags  = gitweb_check_feature('ctags');
5656         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5657         $check_forks = undef
5658                 if ($tagfilter || $search_regexp);
5659
5660         # filtering out forks before filling info allows to do less work
5661         @projects = filter_forks_from_projects_list(\@projects)
5662                 if ($check_forks);
5663         # search_projects_list pre-fills required info
5664         @projects = search_projects_list(\@projects,
5665                                          'search_regexp' => $search_regexp,
5666                                          'tagfilter'  => $tagfilter)
5667                 if ($tagfilter || $search_regexp);
5668         # fill the rest
5669         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5670         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5671         push @all_fields, 'owner' unless($omit_owner);
5672         @projects = fill_project_list_info(\@projects, @all_fields);
5673
5674         $order ||= $default_projects_order;
5675         $from = 0 unless defined $from;
5676         $to = $#projects if (!defined $to || $#projects < $to);
5677
5678         # short circuit
5679         if ($from > $to) {
5680                 print "<center>\n".
5681                       "<b>No such projects found</b><br />\n".
5682                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5683                       "</center>\n<br />\n";
5684                 return;
5685         }
5686
5687         @projects = sort_projects_list(\@projects, $order);
5688
5689         if ($show_ctags) {
5690                 my $ctags = git_gather_all_ctags(\@projects);
5691                 my $cloud = git_populate_project_tagcloud($ctags);
5692                 print git_show_project_tagcloud($cloud, 64);
5693         }
5694
5695         print "<table class=\"project_list\">\n";
5696         unless ($no_header) {
5697                 print "<tr>\n";
5698                 if ($check_forks) {
5699                         print "<th></th>\n";
5700                 }
5701                 print_sort_th('project', $order, 'Project');
5702                 print_sort_th('descr', $order, 'Description');
5703                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5704                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5705                 print "<th></th>\n" . # for links
5706                       "</tr>\n";
5707         }
5708
5709         if ($projects_list_group_categories) {
5710                 # only display categories with projects in the $from-$to window
5711                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5712                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5713                 foreach my $cat (sort keys %categories) {
5714                         unless ($cat eq "") {
5715                                 print "<tr>\n";
5716                                 if ($check_forks) {
5717                                         print "<td></td>\n";
5718                                 }
5719                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5720                                 print "</tr>\n";
5721                         }
5722
5723                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5724                 }
5725         } else {
5726                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5727         }
5728
5729         if (defined $extra) {
5730                 print "<tr>\n";
5731                 if ($check_forks) {
5732                         print "<td></td>\n";
5733                 }
5734                 print "<td colspan=\"5\">$extra</td>\n" .
5735                       "</tr>\n";
5736         }
5737         print "</table>\n";
5738 }
5739
5740 sub git_log_body {
5741         # uses global variable $project
5742         my ($commitlist, $from, $to, $refs, $extra) = @_;
5743
5744         $from = 0 unless defined $from;
5745         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5746
5747         for (my $i = 0; $i <= $to; $i++) {
5748                 my %co = %{$commitlist->[$i]};
5749                 next if !%co;
5750                 my $commit = $co{'id'};
5751                 my $ref = format_ref_marker($refs, $commit);
5752                 git_print_header_div('commit',
5753                                "<span class=\"age\">$co{'age_string'}</span>" .
5754                                esc_html($co{'title'}) . $ref,
5755                                $commit);
5756                 print "<div class=\"title_text\">\n" .
5757                       "<div class=\"log_link\">\n" .
5758                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5759                       " | " .
5760                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5761                       " | " .
5762                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5763                       "<br/>\n" .
5764                       "</div>\n";
5765                       git_print_authorship(\%co, -tag => 'span');
5766                       print "<br/>\n</div>\n";
5767
5768                 print "<div class=\"log_body\">\n";
5769                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5770                 print "</div>\n";
5771         }
5772         if ($extra) {
5773                 print "<div class=\"page_nav\">\n";
5774                 print "$extra\n";
5775                 print "</div>\n";
5776         }
5777 }
5778
5779 sub git_shortlog_body {
5780         # uses global variable $project
5781         my ($commitlist, $from, $to, $refs, $extra) = @_;
5782
5783         $from = 0 unless defined $from;
5784         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5785
5786         print "<table class=\"shortlog\">\n";
5787         my $alternate = 1;
5788         for (my $i = $from; $i <= $to; $i++) {
5789                 my %co = %{$commitlist->[$i]};
5790                 my $commit = $co{'id'};
5791                 my $ref = format_ref_marker($refs, $commit);
5792                 if ($alternate) {
5793                         print "<tr class=\"dark\">\n";
5794                 } else {
5795                         print "<tr class=\"light\">\n";
5796                 }
5797                 $alternate ^= 1;
5798                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5799                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5800                       format_author_html('td', \%co, 10) . "<td>";
5801                 print format_subject_html($co{'title'}, $co{'title_short'},
5802                                           href(action=>"commit", hash=>$commit), $ref);
5803                 print "</td>\n" .
5804                       "<td class=\"link\">" .
5805                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5806                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5807                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5808                 my $snapshot_links = format_snapshot_links($commit);
5809                 if (defined $snapshot_links) {
5810                         print " | " . $snapshot_links;
5811                 }
5812                 print "</td>\n" .
5813                       "</tr>\n";
5814         }
5815         if (defined $extra) {
5816                 print "<tr>\n" .
5817                       "<td colspan=\"4\">$extra</td>\n" .
5818                       "</tr>\n";
5819         }
5820         print "</table>\n";
5821 }
5822
5823 sub git_history_body {
5824         # Warning: assumes constant type (blob or tree) during history
5825         my ($commitlist, $from, $to, $refs, $extra,
5826             $file_name, $file_hash, $ftype) = @_;
5827
5828         $from = 0 unless defined $from;
5829         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5830
5831         print "<table class=\"history\">\n";
5832         my $alternate = 1;
5833         for (my $i = $from; $i <= $to; $i++) {
5834                 my %co = %{$commitlist->[$i]};
5835                 if (!%co) {
5836                         next;
5837                 }
5838                 my $commit = $co{'id'};
5839
5840                 my $ref = format_ref_marker($refs, $commit);
5841
5842                 if ($alternate) {
5843                         print "<tr class=\"dark\">\n";
5844                 } else {
5845                         print "<tr class=\"light\">\n";
5846                 }
5847                 $alternate ^= 1;
5848                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5849         # shortlog:   format_author_html('td', \%co, 10)
5850                       format_author_html('td', \%co, 15, 3) . "<td>";
5851                 # originally git_history used chop_str($co{'title'}, 50)
5852                 print format_subject_html($co{'title'}, $co{'title_short'},
5853                                           href(action=>"commit", hash=>$commit), $ref);
5854                 print "</td>\n" .
5855                       "<td class=\"link\">" .
5856                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5857                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5858
5859                 if ($ftype eq 'blob') {
5860                         my $blob_current = $file_hash;
5861                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5862                         if (defined $blob_current && defined $blob_parent &&
5863                                         $blob_current ne $blob_parent) {
5864                                 print " | " .
5865                                         $cgi->a({-href => href(action=>"blobdiff",
5866                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5867                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5868                                                                file_name=>$file_name)},
5869                                                 "diff to current");
5870                         }
5871                 }
5872                 print "</td>\n" .
5873                       "</tr>\n";
5874         }
5875         if (defined $extra) {
5876                 print "<tr>\n" .
5877                       "<td colspan=\"4\">$extra</td>\n" .
5878                       "</tr>\n";
5879         }
5880         print "</table>\n";
5881 }
5882
5883 sub git_tags_body {
5884         # uses global variable $project
5885         my ($taglist, $from, $to, $extra) = @_;
5886         $from = 0 unless defined $from;
5887         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5888
5889         print "<table class=\"tags\">\n";
5890         my $alternate = 1;
5891         for (my $i = $from; $i <= $to; $i++) {
5892                 my $entry = $taglist->[$i];
5893                 my %tag = %$entry;
5894                 my $comment = $tag{'subject'};
5895                 my $comment_short;
5896                 if (defined $comment) {
5897                         $comment_short = chop_str($comment, 30, 5);
5898                 }
5899                 if ($alternate) {
5900                         print "<tr class=\"dark\">\n";
5901                 } else {
5902                         print "<tr class=\"light\">\n";
5903                 }
5904                 $alternate ^= 1;
5905                 if (defined $tag{'age'}) {
5906                         print "<td><i>$tag{'age'}</i></td>\n";
5907                 } else {
5908                         print "<td></td>\n";
5909                 }
5910                 print "<td>" .
5911                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5912                                -class => "list name"}, esc_html($tag{'name'})) .
5913                       "</td>\n" .
5914                       "<td>";
5915                 if (defined $comment) {
5916                         print format_subject_html($comment, $comment_short,
5917                                                   href(action=>"tag", hash=>$tag{'id'}));
5918                 }
5919                 print "</td>\n" .
5920                       "<td class=\"selflink\">";
5921                 if ($tag{'type'} eq "tag") {
5922                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5923                 } else {
5924                         print "&nbsp;";
5925                 }
5926                 print "</td>\n" .
5927                       "<td class=\"link\">" . " | " .
5928                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5929                 if ($tag{'reftype'} eq "commit") {
5930                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5931                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5932                 } elsif ($tag{'reftype'} eq "blob") {
5933                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5934                 }
5935                 print "</td>\n" .
5936                       "</tr>";
5937         }
5938         if (defined $extra) {
5939                 print "<tr>\n" .
5940                       "<td colspan=\"5\">$extra</td>\n" .
5941                       "</tr>\n";
5942         }
5943         print "</table>\n";
5944 }
5945
5946 sub git_heads_body {
5947         # uses global variable $project
5948         my ($headlist, $head_at, $from, $to, $extra) = @_;
5949         $from = 0 unless defined $from;
5950         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5951
5952         print "<table class=\"heads\">\n";
5953         my $alternate = 1;
5954         for (my $i = $from; $i <= $to; $i++) {
5955                 my $entry = $headlist->[$i];
5956                 my %ref = %$entry;
5957                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5958                 if ($alternate) {
5959                         print "<tr class=\"dark\">\n";
5960                 } else {
5961                         print "<tr class=\"light\">\n";
5962                 }
5963                 $alternate ^= 1;
5964                 print "<td><i>$ref{'age'}</i></td>\n" .
5965                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5966                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5967                                -class => "list name"},esc_html($ref{'name'})) .
5968                       "</td>\n" .
5969                       "<td class=\"link\">" .
5970                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5971                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5972                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5973                       "</td>\n" .
5974                       "</tr>";
5975         }
5976         if (defined $extra) {
5977                 print "<tr>\n" .
5978                       "<td colspan=\"3\">$extra</td>\n" .
5979                       "</tr>\n";
5980         }
5981         print "</table>\n";
5982 }
5983
5984 # Display a single remote block
5985 sub git_remote_block {
5986         my ($remote, $rdata, $limit, $head) = @_;
5987
5988         my $heads = $rdata->{'heads'};
5989         my $fetch = $rdata->{'fetch'};
5990         my $push = $rdata->{'push'};
5991
5992         my $urls_table = "<table class=\"projects_list\">\n" ;
5993
5994         if (defined $fetch) {
5995                 if ($fetch eq $push) {
5996                         $urls_table .= format_repo_url("URL", $fetch);
5997                 } else {
5998                         $urls_table .= format_repo_url("Fetch URL", $fetch);
5999                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6000                 }
6001         } elsif (defined $push) {
6002                 $urls_table .= format_repo_url("Push URL", $push);
6003         } else {
6004                 $urls_table .= format_repo_url("", "No remote URL");
6005         }
6006
6007         $urls_table .= "</table>\n";
6008
6009         my $dots;
6010         if (defined $limit && $limit < @$heads) {
6011                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6012         }
6013
6014         print $urls_table;
6015         git_heads_body($heads, $head, 0, $limit, $dots);
6016 }
6017
6018 # Display a list of remote names with the respective fetch and push URLs
6019 sub git_remotes_list {
6020         my ($remotedata, $limit) = @_;
6021         print "<table class=\"heads\">\n";
6022         my $alternate = 1;
6023         my @remotes = sort keys %$remotedata;
6024
6025         my $limited = $limit && $limit < @remotes;
6026
6027         $#remotes = $limit - 1 if $limited;
6028
6029         while (my $remote = shift @remotes) {
6030                 my $rdata = $remotedata->{$remote};
6031                 my $fetch = $rdata->{'fetch'};
6032                 my $push = $rdata->{'push'};
6033                 if ($alternate) {
6034                         print "<tr class=\"dark\">\n";
6035                 } else {
6036                         print "<tr class=\"light\">\n";
6037                 }
6038                 $alternate ^= 1;
6039                 print "<td>" .
6040                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6041                                -class=> "list name"},esc_html($remote)) .
6042                       "</td>";
6043                 print "<td class=\"link\">" .
6044                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6045                       " | " .
6046                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6047                       "</td>";
6048
6049                 print "</tr>\n";
6050         }
6051
6052         if ($limited) {
6053                 print "<tr>\n" .
6054                       "<td colspan=\"3\">" .
6055                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6056                       "</td>\n" . "</tr>\n";
6057         }
6058
6059         print "</table>";
6060 }
6061
6062 # Display remote heads grouped by remote, unless there are too many
6063 # remotes, in which case we only display the remote names
6064 sub git_remotes_body {
6065         my ($remotedata, $limit, $head) = @_;
6066         if ($limit and $limit < keys %$remotedata) {
6067                 git_remotes_list($remotedata, $limit);
6068         } else {
6069                 fill_remote_heads($remotedata);
6070                 while (my ($remote, $rdata) = each %$remotedata) {
6071                         git_print_section({-class=>"remote", -id=>$remote},
6072                                 ["remotes", $remote, $remote], sub {
6073                                         git_remote_block($remote, $rdata, $limit, $head);
6074                                 });
6075                 }
6076         }
6077 }
6078
6079 sub git_search_message {
6080         my %co = @_;
6081
6082         my $greptype;
6083         if ($searchtype eq 'commit') {
6084                 $greptype = "--grep=";
6085         } elsif ($searchtype eq 'author') {
6086                 $greptype = "--author=";
6087         } elsif ($searchtype eq 'committer') {
6088                 $greptype = "--committer=";
6089         }
6090         $greptype .= $searchtext;
6091         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6092                                        $greptype, '--regexp-ignore-case',
6093                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6094
6095         my $paging_nav = '';
6096         if ($page > 0) {
6097                 $paging_nav .=
6098                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6099                                 "first") .
6100                         " &sdot; " .
6101                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6102                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6103         } else {
6104                 $paging_nav .= "first &sdot; prev";
6105         }
6106         my $next_link = '';
6107         if ($#commitlist >= 100) {
6108                 $next_link =
6109                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6110                                  -accesskey => "n", -title => "Alt-n"}, "next");
6111                 $paging_nav .= " &sdot; $next_link";
6112         } else {
6113                 $paging_nav .= " &sdot; next";
6114         }
6115
6116         git_header_html();
6117
6118         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6119         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6120         if ($page == 0 && !@commitlist) {
6121                 print "<p>No match.</p>\n";
6122         } else {
6123                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6124         }
6125
6126         git_footer_html();
6127 }
6128
6129 sub git_search_changes {
6130         my %co = @_;
6131
6132         local $/ = "\n";
6133         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6134                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6135                 ($search_use_regexp ? '--pickaxe-regex' : ())
6136                         or die_error(500, "Open git-log failed");
6137
6138         git_header_html();
6139
6140         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6141         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6142
6143         print "<table class=\"pickaxe search\">\n";
6144         my $alternate = 1;
6145         undef %co;
6146         my @files;
6147         while (my $line = <$fd>) {
6148                 chomp $line;
6149                 next unless $line;
6150
6151                 my %set = parse_difftree_raw_line($line);
6152                 if (defined $set{'commit'}) {
6153                         # finish previous commit
6154                         if (%co) {
6155                                 print "</td>\n" .
6156                                       "<td class=\"link\">" .
6157                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6158                                               "commit") .
6159                                       " | " .
6160                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6161                                                              hash_base=>$co{'id'})},
6162                                               "tree") .
6163                                       "</td>\n" .
6164                                       "</tr>\n";
6165                         }
6166
6167                         if ($alternate) {
6168                                 print "<tr class=\"dark\">\n";
6169                         } else {
6170                                 print "<tr class=\"light\">\n";
6171                         }
6172                         $alternate ^= 1;
6173                         %co = parse_commit($set{'commit'});
6174                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6175                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6176                               "<td><i>$author</i></td>\n" .
6177                               "<td>" .
6178                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6179                                       -class => "list subject"},
6180                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6181                 } elsif (defined $set{'to_id'}) {
6182                         next if ($set{'to_id'} =~ m/^0{40}$/);
6183
6184                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6185                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6186                                       -class => "list"},
6187                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6188                               "<br/>\n";
6189                 }
6190         }
6191         close $fd;
6192
6193         # finish last commit (warning: repetition!)
6194         if (%co) {
6195                 print "</td>\n" .
6196                       "<td class=\"link\">" .
6197                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6198                               "commit") .
6199                       " | " .
6200                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6201                                              hash_base=>$co{'id'})},
6202                               "tree") .
6203                       "</td>\n" .
6204                       "</tr>\n";
6205         }
6206
6207         print "</table>\n";
6208
6209         git_footer_html();
6210 }
6211
6212 sub git_search_files {
6213         my %co = @_;
6214
6215         local $/ = "\n";
6216         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6217                 $search_use_regexp ? ('-E', '-i') : '-F',
6218                 $searchtext, $co{'tree'}
6219                         or die_error(500, "Open git-grep failed");
6220
6221         git_header_html();
6222
6223         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6224         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6225
6226         print "<table class=\"grep_search\">\n";
6227         my $alternate = 1;
6228         my $matches = 0;
6229         my $lastfile = '';
6230         my $file_href;
6231         while (my $line = <$fd>) {
6232                 chomp $line;
6233                 my ($file, $lno, $ltext, $binary);
6234                 last if ($matches++ > 1000);
6235                 if ($line =~ /^Binary file (.+) matches$/) {
6236                         $file = $1;
6237                         $binary = 1;
6238                 } else {
6239                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6240                         $file =~ s/^$co{'tree'}://;
6241                 }
6242                 if ($file ne $lastfile) {
6243                         $lastfile and print "</td></tr>\n";
6244                         if ($alternate++) {
6245                                 print "<tr class=\"dark\">\n";
6246                         } else {
6247                                 print "<tr class=\"light\">\n";
6248                         }
6249                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6250                                           file_name=>$file);
6251                         print "<td class=\"list\">".
6252                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6253                         print "</td><td>\n";
6254                         $lastfile = $file;
6255                 }
6256                 if ($binary) {
6257                         print "<div class=\"binary\">Binary file</div>\n";
6258                 } else {
6259                         $ltext = untabify($ltext);
6260                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6261                                 $ltext = esc_html($1, -nbsp=>1);
6262                                 $ltext .= '<span class="match">';
6263                                 $ltext .= esc_html($2, -nbsp=>1);
6264                                 $ltext .= '</span>';
6265                                 $ltext .= esc_html($3, -nbsp=>1);
6266                         } else {
6267                                 $ltext = esc_html($ltext, -nbsp=>1);
6268                         }
6269                         print "<div class=\"pre\">" .
6270                                 $cgi->a({-href => $file_href.'#l'.$lno,
6271                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6272                                 ' ' .  $ltext . "</div>\n";
6273                 }
6274         }
6275         if ($lastfile) {
6276                 print "</td></tr>\n";
6277                 if ($matches > 1000) {
6278                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6279                 }
6280         } else {
6281                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6282         }
6283         close $fd;
6284
6285         print "</table>\n";
6286
6287         git_footer_html();
6288 }
6289
6290 sub git_search_grep_body {
6291         my ($commitlist, $from, $to, $extra) = @_;
6292         $from = 0 unless defined $from;
6293         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6294
6295         print "<table class=\"commit_search\">\n";
6296         my $alternate = 1;
6297         for (my $i = $from; $i <= $to; $i++) {
6298                 my %co = %{$commitlist->[$i]};
6299                 if (!%co) {
6300                         next;
6301                 }
6302                 my $commit = $co{'id'};
6303                 if ($alternate) {
6304                         print "<tr class=\"dark\">\n";
6305                 } else {
6306                         print "<tr class=\"light\">\n";
6307                 }
6308                 $alternate ^= 1;
6309                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6310                       format_author_html('td', \%co, 15, 5) .
6311                       "<td>" .
6312                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6313                                -class => "list subject"},
6314                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6315                 my $comment = $co{'comment'};
6316                 foreach my $line (@$comment) {
6317                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6318                                 my ($lead, $match, $trail) = ($1, $2, $3);
6319                                 $match = chop_str($match, 70, 5, 'center');
6320                                 my $contextlen = int((80 - length($match))/2);
6321                                 $contextlen = 30 if ($contextlen > 30);
6322                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6323                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6324
6325                                 $lead  = esc_html($lead);
6326                                 $match = esc_html($match);
6327                                 $trail = esc_html($trail);
6328
6329                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6330                         }
6331                 }
6332                 print "</td>\n" .
6333                       "<td class=\"link\">" .
6334                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6335                       " | " .
6336                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6337                       " | " .
6338                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6339                 print "</td>\n" .
6340                       "</tr>\n";
6341         }
6342         if (defined $extra) {
6343                 print "<tr>\n" .
6344                       "<td colspan=\"3\">$extra</td>\n" .
6345                       "</tr>\n";
6346         }
6347         print "</table>\n";
6348 }
6349
6350 ## ======================================================================
6351 ## ======================================================================
6352 ## actions
6353
6354 sub git_project_list {
6355         my $order = $input_params{'order'};
6356         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6357                 die_error(400, "Unknown order parameter");
6358         }
6359
6360         my @list = git_get_projects_list($project_filter, $strict_export);
6361         if (!@list) {
6362                 die_error(404, "No projects found");
6363         }
6364
6365         git_header_html();
6366         if (defined $home_text && -f $home_text) {
6367                 print "<div class=\"index_include\">\n";
6368                 insert_file($home_text);
6369                 print "</div>\n";
6370         }
6371
6372         git_project_search_form($searchtext, $search_use_regexp);
6373         git_project_list_body(\@list, $order);
6374         git_footer_html();
6375 }
6376
6377 sub git_forks {
6378         my $order = $input_params{'order'};
6379         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6380                 die_error(400, "Unknown order parameter");
6381         }
6382
6383         my $filter = $project;
6384         $filter =~ s/\.git$//;
6385         my @list = git_get_projects_list($filter);
6386         if (!@list) {
6387                 die_error(404, "No forks found");
6388         }
6389
6390         git_header_html();
6391         git_print_page_nav('','');
6392         git_print_header_div('summary', "$project forks");
6393         git_project_list_body(\@list, $order);
6394         git_footer_html();
6395 }
6396
6397 sub git_project_index {
6398         my @projects = git_get_projects_list($project_filter, $strict_export);
6399         if (!@projects) {
6400                 die_error(404, "No projects found");
6401         }
6402
6403         print $cgi->header(
6404                 -type => 'text/plain',
6405                 -charset => 'utf-8',
6406                 -content_disposition => 'inline; filename="index.aux"');
6407
6408         foreach my $pr (@projects) {
6409                 if (!exists $pr->{'owner'}) {
6410                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6411                 }
6412
6413                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6414                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6415                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6416                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6417                 $path  =~ s/ /\+/g;
6418                 $owner =~ s/ /\+/g;
6419
6420                 print "$path $owner\n";
6421         }
6422 }
6423
6424 sub git_summary {
6425         my $descr = git_get_project_description($project) || "none";
6426         my %co = parse_commit("HEAD");
6427         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6428         my $head = $co{'id'};
6429         my $remote_heads = gitweb_check_feature('remote_heads');
6430
6431         my $owner = git_get_project_owner($project);
6432
6433         my $refs = git_get_references();
6434         # These get_*_list functions return one more to allow us to see if
6435         # there are more ...
6436         my @taglist  = git_get_tags_list(16);
6437         my @headlist = git_get_heads_list(16);
6438         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6439         my @forklist;
6440         my $check_forks = gitweb_check_feature('forks');
6441
6442         if ($check_forks) {
6443                 # find forks of a project
6444                 my $filter = $project;
6445                 $filter =~ s/\.git$//;
6446                 @forklist = git_get_projects_list($filter);
6447                 # filter out forks of forks
6448                 @forklist = filter_forks_from_projects_list(\@forklist)
6449                         if (@forklist);
6450         }
6451
6452         git_header_html();
6453         git_print_page_nav('summary','', $head);
6454
6455         print "<div class=\"title\">&nbsp;</div>\n";
6456         print "<table class=\"projects_list\">\n" .
6457               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6458         unless ($omit_owner) {
6459                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6460         }
6461         if (defined $cd{'rfc2822'}) {
6462                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6463                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6464         }
6465
6466         # use per project git URL list in $projectroot/$project/cloneurl
6467         # or make project git URL from git base URL and project name
6468         my $url_tag = "URL";
6469         my @url_list = git_get_project_url_list($project);
6470         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6471         foreach my $git_url (@url_list) {
6472                 next unless $git_url;
6473                 print format_repo_url($url_tag, $git_url);
6474                 $url_tag = "";
6475         }
6476
6477         # Tag cloud
6478         my $show_ctags = gitweb_check_feature('ctags');
6479         if ($show_ctags) {
6480                 my $ctags = git_get_project_ctags($project);
6481                 if (%$ctags) {
6482                         # without ability to add tags, don't show if there are none
6483                         my $cloud = git_populate_project_tagcloud($ctags);
6484                         print "<tr id=\"metadata_ctags\">" .
6485                               "<td>content tags</td>" .
6486                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6487                               "</tr>\n";
6488                 }
6489         }
6490
6491         print "</table>\n";
6492
6493         # If XSS prevention is on, we don't include README.html.
6494         # TODO: Allow a readme in some safe format.
6495         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6496                 print "<div class=\"title\">readme</div>\n" .
6497                       "<div class=\"readme\">\n";
6498                 insert_file("$projectroot/$project/README.html");
6499                 print "\n</div>\n"; # class="readme"
6500         }
6501
6502         # we need to request one more than 16 (0..15) to check if
6503         # those 16 are all
6504         my @commitlist = $head ? parse_commits($head, 17) : ();
6505         if (@commitlist) {
6506                 git_print_header_div('shortlog');
6507                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6508                                   $#commitlist <=  15 ? undef :
6509                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6510         }
6511
6512         if (@taglist) {
6513                 git_print_header_div('tags');
6514                 git_tags_body(\@taglist, 0, 15,
6515                               $#taglist <=  15 ? undef :
6516                               $cgi->a({-href => href(action=>"tags")}, "..."));
6517         }
6518
6519         if (@headlist) {
6520                 git_print_header_div('heads');
6521                 git_heads_body(\@headlist, $head, 0, 15,
6522                                $#headlist <= 15 ? undef :
6523                                $cgi->a({-href => href(action=>"heads")}, "..."));
6524         }
6525
6526         if (%remotedata) {
6527                 git_print_header_div('remotes');
6528                 git_remotes_body(\%remotedata, 15, $head);
6529         }
6530
6531         if (@forklist) {
6532                 git_print_header_div('forks');
6533                 git_project_list_body(\@forklist, 'age', 0, 15,
6534                                       $#forklist <= 15 ? undef :
6535                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6536                                       'no_header');
6537         }
6538
6539         git_footer_html();
6540 }
6541
6542 sub git_tag {
6543         my %tag = parse_tag($hash);
6544
6545         if (! %tag) {
6546                 die_error(404, "Unknown tag object");
6547         }
6548
6549         my $head = git_get_head_hash($project);
6550         git_header_html();
6551         git_print_page_nav('','', $head,undef,$head);
6552         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6553         print "<div class=\"title_text\">\n" .
6554               "<table class=\"object_header\">\n" .
6555               "<tr>\n" .
6556               "<td>object</td>\n" .
6557               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6558                                $tag{'object'}) . "</td>\n" .
6559               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6560                                               $tag{'type'}) . "</td>\n" .
6561               "</tr>\n";
6562         if (defined($tag{'author'})) {
6563                 git_print_authorship_rows(\%tag, 'author');
6564         }
6565         print "</table>\n\n" .
6566               "</div>\n";
6567         print "<div class=\"page_body\">";
6568         my $comment = $tag{'comment'};
6569         foreach my $line (@$comment) {
6570                 chomp $line;
6571                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6572         }
6573         print "</div>\n";
6574         git_footer_html();
6575 }
6576
6577 sub git_blame_common {
6578         my $format = shift || 'porcelain';
6579         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6580                 $format = 'incremental';
6581                 $action = 'blame_incremental'; # for page title etc
6582         }
6583
6584         # permissions
6585         gitweb_check_feature('blame')
6586                 or die_error(403, "Blame view not allowed");
6587
6588         # error checking
6589         die_error(400, "No file name given") unless $file_name;
6590         $hash_base ||= git_get_head_hash($project);
6591         die_error(404, "Couldn't find base commit") unless $hash_base;
6592         my %co = parse_commit($hash_base)
6593                 or die_error(404, "Commit not found");
6594         my $ftype = "blob";
6595         if (!defined $hash) {
6596                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6597                         or die_error(404, "Error looking up file");
6598         } else {
6599                 $ftype = git_get_type($hash);
6600                 if ($ftype !~ "blob") {
6601                         die_error(400, "Object is not a blob");
6602                 }
6603         }
6604
6605         my $fd;
6606         if ($format eq 'incremental') {
6607                 # get file contents (as base)
6608                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6609                         or die_error(500, "Open git-cat-file failed");
6610         } elsif ($format eq 'data') {
6611                 # run git-blame --incremental
6612                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6613                         $hash_base, "--", $file_name
6614                         or die_error(500, "Open git-blame --incremental failed");
6615         } else {
6616                 # run git-blame --porcelain
6617                 open $fd, "-|", git_cmd(), "blame", '-p',
6618                         $hash_base, '--', $file_name
6619                         or die_error(500, "Open git-blame --porcelain failed");
6620         }
6621
6622         # incremental blame data returns early
6623         if ($format eq 'data') {
6624                 print $cgi->header(
6625                         -type=>"text/plain", -charset => "utf-8",
6626                         -status=> "200 OK");
6627                 local $| = 1; # output autoflush
6628                 while (my $line = <$fd>) {
6629                         print to_utf8($line);
6630                 }
6631                 close $fd
6632                         or print "ERROR $!\n";
6633
6634                 print 'END';
6635                 if (defined $t0 && gitweb_check_feature('timed')) {
6636                         print ' '.
6637                               tv_interval($t0, [ gettimeofday() ]).
6638                               ' '.$number_of_git_cmds;
6639                 }
6640                 print "\n";
6641
6642                 return;
6643         }
6644
6645         # page header
6646         git_header_html();
6647         my $formats_nav =
6648                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6649                         "blob") .
6650                 " | ";
6651         if ($format eq 'incremental') {
6652                 $formats_nav .=
6653                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6654                                 "blame") . " (non-incremental)";
6655         } else {
6656                 $formats_nav .=
6657                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6658                                 "blame") . " (incremental)";
6659         }
6660         $formats_nav .=
6661                 " | " .
6662                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6663                         "history") .
6664                 " | " .
6665                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6666                         "HEAD");
6667         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6668         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6669         git_print_page_path($file_name, $ftype, $hash_base);
6670
6671         # page body
6672         if ($format eq 'incremental') {
6673                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6674                       "This page requires JavaScript to run.\n Use ".
6675                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6676                               'this page').
6677                       " instead.\n".
6678                       "</b></center></div>\n</noscript>\n";
6679
6680                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6681         }
6682
6683         print qq!<div class="page_body">\n!;
6684         print qq!<div id="progress_info">... / ...</div>\n!
6685                 if ($format eq 'incremental');
6686         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6687               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6688               qq!<thead>\n!.
6689               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6690               qq!</thead>\n!.
6691               qq!<tbody>\n!;
6692
6693         my @rev_color = qw(light dark);
6694         my $num_colors = scalar(@rev_color);
6695         my $current_color = 0;
6696
6697         if ($format eq 'incremental') {
6698                 my $color_class = $rev_color[$current_color];
6699
6700                 #contents of a file
6701                 my $linenr = 0;
6702         LINE:
6703                 while (my $line = <$fd>) {
6704                         chomp $line;
6705                         $linenr++;
6706
6707                         print qq!<tr id="l$linenr" class="$color_class">!.
6708                               qq!<td class="sha1"><a href=""> </a></td>!.
6709                               qq!<td class="linenr">!.
6710                               qq!<a class="linenr" href="">$linenr</a></td>!;
6711                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6712                         print qq!</tr>\n!;
6713                 }
6714
6715         } else { # porcelain, i.e. ordinary blame
6716                 my %metainfo = (); # saves information about commits
6717
6718                 # blame data
6719         LINE:
6720                 while (my $line = <$fd>) {
6721                         chomp $line;
6722                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6723                         # no <lines in group> for subsequent lines in group of lines
6724                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6725                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6726                         if (!exists $metainfo{$full_rev}) {
6727                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6728                         }
6729                         my $meta = $metainfo{$full_rev};
6730                         my $data;
6731                         while ($data = <$fd>) {
6732                                 chomp $data;
6733                                 last if ($data =~ s/^\t//); # contents of line
6734                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6735                                         $meta->{$1} = $2 unless exists $meta->{$1};
6736                                 }
6737                                 if ($data =~ /^previous /) {
6738                                         $meta->{'nprevious'}++;
6739                                 }
6740                         }
6741                         my $short_rev = substr($full_rev, 0, 8);
6742                         my $author = $meta->{'author'};
6743                         my %date =
6744                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6745                         my $date = $date{'iso-tz'};
6746                         if ($group_size) {
6747                                 $current_color = ($current_color + 1) % $num_colors;
6748                         }
6749                         my $tr_class = $rev_color[$current_color];
6750                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6751                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6752                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6753                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6754                         if ($group_size) {
6755                                 print "<td class=\"sha1\"";
6756                                 print " title=\"". esc_html($author) . ", $date\"";
6757                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6758                                 print ">";
6759                                 print $cgi->a({-href => href(action=>"commit",
6760                                                              hash=>$full_rev,
6761                                                              file_name=>$file_name)},
6762                                               esc_html($short_rev));
6763                                 if ($group_size >= 2) {
6764                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6765                                         if (@author_initials) {
6766                                                 print "<br />" .
6767                                                       esc_html(join('', @author_initials));
6768                                                 #           or join('.', ...)
6769                                         }
6770                                 }
6771                                 print "</td>\n";
6772                         }
6773                         # 'previous' <sha1 of parent commit> <filename at commit>
6774                         if (exists $meta->{'previous'} &&
6775                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6776                                 $meta->{'parent'} = $1;
6777                                 $meta->{'file_parent'} = unquote($2);
6778                         }
6779                         my $linenr_commit =
6780                                 exists($meta->{'parent'}) ?
6781                                 $meta->{'parent'} : $full_rev;
6782                         my $linenr_filename =
6783                                 exists($meta->{'file_parent'}) ?
6784                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6785                         my $blamed = href(action => 'blame',
6786                                           file_name => $linenr_filename,
6787                                           hash_base => $linenr_commit);
6788                         print "<td class=\"linenr\">";
6789                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6790                                         -class => "linenr" },
6791                                       esc_html($lineno));
6792                         print "</td>";
6793                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6794                         print "</tr>\n";
6795                 } # end while
6796
6797         }
6798
6799         # footer
6800         print "</tbody>\n".
6801               "</table>\n"; # class="blame"
6802         print "</div>\n";   # class="blame_body"
6803         close $fd
6804                 or print "Reading blob failed\n";
6805
6806         git_footer_html();
6807 }
6808
6809 sub git_blame {
6810         git_blame_common();
6811 }
6812
6813 sub git_blame_incremental {
6814         git_blame_common('incremental');
6815 }
6816
6817 sub git_blame_data {
6818         git_blame_common('data');
6819 }
6820
6821 sub git_tags {
6822         my $head = git_get_head_hash($project);
6823         git_header_html();
6824         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6825         git_print_header_div('summary', $project);
6826
6827         my @tagslist = git_get_tags_list();
6828         if (@tagslist) {
6829                 git_tags_body(\@tagslist);
6830         }
6831         git_footer_html();
6832 }
6833
6834 sub git_heads {
6835         my $head = git_get_head_hash($project);
6836         git_header_html();
6837         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6838         git_print_header_div('summary', $project);
6839
6840         my @headslist = git_get_heads_list();
6841         if (@headslist) {
6842                 git_heads_body(\@headslist, $head);
6843         }
6844         git_footer_html();
6845 }
6846
6847 # used both for single remote view and for list of all the remotes
6848 sub git_remotes {
6849         gitweb_check_feature('remote_heads')
6850                 or die_error(403, "Remote heads view is disabled");
6851
6852         my $head = git_get_head_hash($project);
6853         my $remote = $input_params{'hash'};
6854
6855         my $remotedata = git_get_remotes_list($remote);
6856         die_error(500, "Unable to get remote information") unless defined $remotedata;
6857
6858         unless (%$remotedata) {
6859                 die_error(404, defined $remote ?
6860                         "Remote $remote not found" :
6861                         "No remotes found");
6862         }
6863
6864         git_header_html(undef, undef, -action_extra => $remote);
6865         git_print_page_nav('', '',  $head, undef, $head,
6866                 format_ref_views($remote ? '' : 'remotes'));
6867
6868         fill_remote_heads($remotedata);
6869         if (defined $remote) {
6870                 git_print_header_div('remotes', "$remote remote for $project");
6871                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6872         } else {
6873                 git_print_header_div('summary', "$project remotes");
6874                 git_remotes_body($remotedata, undef, $head);
6875         }
6876
6877         git_footer_html();
6878 }
6879
6880 sub git_blob_plain {
6881         my $type = shift;
6882         my $expires;
6883
6884         if (!defined $hash) {
6885                 if (defined $file_name) {
6886                         my $base = $hash_base || git_get_head_hash($project);
6887                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6888                                 or die_error(404, "Cannot find file");
6889                 } else {
6890                         die_error(400, "No file name defined");
6891                 }
6892         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6893                 # blobs defined by non-textual hash id's can be cached
6894                 $expires = "+1d";
6895         }
6896
6897         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6898                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6899
6900         # content-type (can include charset)
6901         $type = blob_contenttype($fd, $file_name, $type);
6902
6903         # "save as" filename, even when no $file_name is given
6904         my $save_as = "$hash";
6905         if (defined $file_name) {
6906                 $save_as = $file_name;
6907         } elsif ($type =~ m/^text\//) {
6908                 $save_as .= '.txt';
6909         }
6910
6911         # With XSS prevention on, blobs of all types except a few known safe
6912         # ones are served with "Content-Disposition: attachment" to make sure
6913         # they don't run in our security domain.  For certain image types,
6914         # blob view writes an <img> tag referring to blob_plain view, and we
6915         # want to be sure not to break that by serving the image as an
6916         # attachment (though Firefox 3 doesn't seem to care).
6917         my $sandbox = $prevent_xss &&
6918                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6919
6920         # serve text/* as text/plain
6921         if ($prevent_xss &&
6922             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6923              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6924                 my $rest = $1;
6925                 $rest = defined $rest ? $rest : '';
6926                 $type = "text/plain$rest";
6927         }
6928
6929         print $cgi->header(
6930                 -type => $type,
6931                 -expires => $expires,
6932                 -content_disposition =>
6933                         ($sandbox ? 'attachment' : 'inline')
6934                         . '; filename="' . $save_as . '"');
6935         local $/ = undef;
6936         binmode STDOUT, ':raw';
6937         print <$fd>;
6938         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6939         close $fd;
6940 }
6941
6942 sub git_blob {
6943         my $expires;
6944
6945         if (!defined $hash) {
6946                 if (defined $file_name) {
6947                         my $base = $hash_base || git_get_head_hash($project);
6948                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6949                                 or die_error(404, "Cannot find file");
6950                 } else {
6951                         die_error(400, "No file name defined");
6952                 }
6953         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6954                 # blobs defined by non-textual hash id's can be cached
6955                 $expires = "+1d";
6956         }
6957
6958         my $have_blame = gitweb_check_feature('blame');
6959         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6960                 or die_error(500, "Couldn't cat $file_name, $hash");
6961         my $mimetype = blob_mimetype($fd, $file_name);
6962         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6963         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6964                 close $fd;
6965                 return git_blob_plain($mimetype);
6966         }
6967         # we can have blame only for text/* mimetype
6968         $have_blame &&= ($mimetype =~ m!^text/!);
6969
6970         my $highlight = gitweb_check_feature('highlight');
6971         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6972         $fd = run_highlighter($fd, $highlight, $syntax)
6973                 if $syntax;
6974
6975         git_header_html(undef, $expires);
6976         my $formats_nav = '';
6977         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6978                 if (defined $file_name) {
6979                         if ($have_blame) {
6980                                 $formats_nav .=
6981                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
6982                                                 "blame") .
6983                                         " | ";
6984                         }
6985                         $formats_nav .=
6986                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6987                                         "history") .
6988                                 " | " .
6989                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6990                                         "raw") .
6991                                 " | " .
6992                                 $cgi->a({-href => href(action=>"blob",
6993                                                        hash_base=>"HEAD", file_name=>$file_name)},
6994                                         "HEAD");
6995                 } else {
6996                         $formats_nav .=
6997                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
6998                                         "raw");
6999                 }
7000                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7001                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7002         } else {
7003                 print "<div class=\"page_nav\">\n" .
7004                       "<br/><br/></div>\n" .
7005                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7006         }
7007         git_print_page_path($file_name, "blob", $hash_base);
7008         print "<div class=\"page_body\">\n";
7009         if ($mimetype =~ m!^image/!) {
7010                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7011                 if ($file_name) {
7012                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7013                 }
7014                 print qq! src="! .
7015                       href(action=>"blob_plain", hash=>$hash,
7016                            hash_base=>$hash_base, file_name=>$file_name) .
7017                       qq!" />\n!;
7018         } else {
7019                 my $nr;
7020                 while (my $line = <$fd>) {
7021                         chomp $line;
7022                         $nr++;
7023                         $line = untabify($line);
7024                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7025                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7026                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7027                 }
7028         }
7029         close $fd
7030                 or print "Reading blob failed.\n";
7031         print "</div>";
7032         git_footer_html();
7033 }
7034
7035 sub git_tree {
7036         if (!defined $hash_base) {
7037                 $hash_base = "HEAD";
7038         }
7039         if (!defined $hash) {
7040                 if (defined $file_name) {
7041                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7042                 } else {
7043                         $hash = $hash_base;
7044                 }
7045         }
7046         die_error(404, "No such tree") unless defined($hash);
7047
7048         my $show_sizes = gitweb_check_feature('show-sizes');
7049         my $have_blame = gitweb_check_feature('blame');
7050
7051         my @entries = ();
7052         {
7053                 local $/ = "\0";
7054                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7055                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7056                         or die_error(500, "Open git-ls-tree failed");
7057                 @entries = map { chomp; $_ } <$fd>;
7058                 close $fd
7059                         or die_error(404, "Reading tree failed");
7060         }
7061
7062         my $refs = git_get_references();
7063         my $ref = format_ref_marker($refs, $hash_base);
7064         git_header_html();
7065         my $basedir = '';
7066         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7067                 my @views_nav = ();
7068                 if (defined $file_name) {
7069                         push @views_nav,
7070                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7071                                         "history"),
7072                                 $cgi->a({-href => href(action=>"tree",
7073                                                        hash_base=>"HEAD", file_name=>$file_name)},
7074                                         "HEAD"),
7075                 }
7076                 my $snapshot_links = format_snapshot_links($hash);
7077                 if (defined $snapshot_links) {
7078                         # FIXME: Should be available when we have no hash base as well.
7079                         push @views_nav, $snapshot_links;
7080                 }
7081                 git_print_page_nav('tree','', $hash_base, undef, undef,
7082                                    join(' | ', @views_nav));
7083                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7084         } else {
7085                 undef $hash_base;
7086                 print "<div class=\"page_nav\">\n";
7087                 print "<br/><br/></div>\n";
7088                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7089         }
7090         if (defined $file_name) {
7091                 $basedir = $file_name;
7092                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7093                         $basedir .= '/';
7094                 }
7095                 git_print_page_path($file_name, 'tree', $hash_base);
7096         }
7097         print "<div class=\"page_body\">\n";
7098         print "<table class=\"tree\">\n";
7099         my $alternate = 1;
7100         # '..' (top directory) link if possible
7101         if (defined $hash_base &&
7102             defined $file_name && $file_name =~ m![^/]+$!) {
7103                 if ($alternate) {
7104                         print "<tr class=\"dark\">\n";
7105                 } else {
7106                         print "<tr class=\"light\">\n";
7107                 }
7108                 $alternate ^= 1;
7109
7110                 my $up = $file_name;
7111                 $up =~ s!/?[^/]+$!!;
7112                 undef $up unless $up;
7113                 # based on git_print_tree_entry
7114                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7115                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7116                 print '<td class="list">';
7117                 print $cgi->a({-href => href(action=>"tree",
7118                                              hash_base=>$hash_base,
7119                                              file_name=>$up)},
7120                               "..");
7121                 print "</td>\n";
7122                 print "<td class=\"link\"></td>\n";
7123
7124                 print "</tr>\n";
7125         }
7126         foreach my $line (@entries) {
7127                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7128
7129                 if ($alternate) {
7130                         print "<tr class=\"dark\">\n";
7131                 } else {
7132                         print "<tr class=\"light\">\n";
7133                 }
7134                 $alternate ^= 1;
7135
7136                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7137
7138                 print "</tr>\n";
7139         }
7140         print "</table>\n" .
7141               "</div>";
7142         git_footer_html();
7143 }
7144
7145 sub snapshot_name {
7146         my ($project, $hash) = @_;
7147
7148         # path/to/project.git  -> project
7149         # path/to/project/.git -> project
7150         my $name = to_utf8($project);
7151         $name =~ s,([^/])/*\.git$,$1,;
7152         $name = basename($name);
7153         # sanitize name
7154         $name =~ s/[[:cntrl:]]/?/g;
7155
7156         my $ver = $hash;
7157         if ($hash =~ /^[0-9a-fA-F]+$/) {
7158                 # shorten SHA-1 hash
7159                 my $full_hash = git_get_full_hash($project, $hash);
7160                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7161                         $ver = git_get_short_hash($project, $hash);
7162                 }
7163         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7164                 # tags don't need shortened SHA-1 hash
7165                 $ver = $1;
7166         } else {
7167                 # branches and other need shortened SHA-1 hash
7168                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7169                         $ver = $1;
7170                 }
7171                 $ver .= '-' . git_get_short_hash($project, $hash);
7172         }
7173         # in case of hierarchical branch names
7174         $ver =~ s!/!.!g;
7175
7176         # name = project-version_string
7177         $name = "$name-$ver";
7178
7179         return wantarray ? ($name, $name) : $name;
7180 }
7181
7182 sub exit_if_unmodified_since {
7183         my ($latest_epoch) = @_;
7184         our $cgi;
7185
7186         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7187         if (defined $if_modified) {
7188                 my $since;
7189                 if (eval { require HTTP::Date; 1; }) {
7190                         $since = HTTP::Date::str2time($if_modified);
7191                 } elsif (eval { require Time::ParseDate; 1; }) {
7192                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7193                 }
7194                 if (defined $since && $latest_epoch <= $since) {
7195                         my %latest_date = parse_date($latest_epoch);
7196                         print $cgi->header(
7197                                 -last_modified => $latest_date{'rfc2822'},
7198                                 -status => '304 Not Modified');
7199                         goto DONE_GITWEB;
7200                 }
7201         }
7202 }
7203
7204 sub git_snapshot {
7205         my $format = $input_params{'snapshot_format'};
7206         if (!@snapshot_fmts) {
7207                 die_error(403, "Snapshots not allowed");
7208         }
7209         # default to first supported snapshot format
7210         $format ||= $snapshot_fmts[0];
7211         if ($format !~ m/^[a-z0-9]+$/) {
7212                 die_error(400, "Invalid snapshot format parameter");
7213         } elsif (!exists($known_snapshot_formats{$format})) {
7214                 die_error(400, "Unknown snapshot format");
7215         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7216                 die_error(403, "Snapshot format not allowed");
7217         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7218                 die_error(403, "Unsupported snapshot format");
7219         }
7220
7221         my $type = git_get_type("$hash^{}");
7222         if (!$type) {
7223                 die_error(404, 'Object does not exist');
7224         }  elsif ($type eq 'blob') {
7225                 die_error(400, 'Object is not a tree-ish');
7226         }
7227
7228         my ($name, $prefix) = snapshot_name($project, $hash);
7229         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7230
7231         my %co = parse_commit($hash);
7232         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7233
7234         my $cmd = quote_command(
7235                 git_cmd(), 'archive',
7236                 "--format=$known_snapshot_formats{$format}{'format'}",
7237                 "--prefix=$prefix/", $hash);
7238         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7239                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7240         }
7241
7242         $filename =~ s/(["\\])/\\$1/g;
7243         my %latest_date;
7244         if (%co) {
7245                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7246         }
7247
7248         print $cgi->header(
7249                 -type => $known_snapshot_formats{$format}{'type'},
7250                 -content_disposition => 'inline; filename="' . $filename . '"',
7251                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7252                 -status => '200 OK');
7253
7254         open my $fd, "-|", $cmd
7255                 or die_error(500, "Execute git-archive failed");
7256         binmode STDOUT, ':raw';
7257         print <$fd>;
7258         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7259         close $fd;
7260 }
7261
7262 sub git_log_generic {
7263         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7264
7265         my $head = git_get_head_hash($project);
7266         if (!defined $base) {
7267                 $base = $head;
7268         }
7269         if (!defined $page) {
7270                 $page = 0;
7271         }
7272         my $refs = git_get_references();
7273
7274         my $commit_hash = $base;
7275         if (defined $parent) {
7276                 $commit_hash = "$parent..$base";
7277         }
7278         my @commitlist =
7279                 parse_commits($commit_hash, 101, (100 * $page),
7280                               defined $file_name ? ($file_name, "--full-history") : ());
7281
7282         my $ftype;
7283         if (!defined $file_hash && defined $file_name) {
7284                 # some commits could have deleted file in question,
7285                 # and not have it in tree, but one of them has to have it
7286                 for (my $i = 0; $i < @commitlist; $i++) {
7287                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7288                         last if defined $file_hash;
7289                 }
7290         }
7291         if (defined $file_hash) {
7292                 $ftype = git_get_type($file_hash);
7293         }
7294         if (defined $file_name && !defined $ftype) {
7295                 die_error(500, "Unknown type of object");
7296         }
7297         my %co;
7298         if (defined $file_name) {
7299                 %co = parse_commit($base)
7300                         or die_error(404, "Unknown commit object");
7301         }
7302
7303
7304         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7305         my $next_link = '';
7306         if ($#commitlist >= 100) {
7307                 $next_link =
7308                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7309                                  -accesskey => "n", -title => "Alt-n"}, "next");
7310         }
7311         my $patch_max = gitweb_get_feature('patches');
7312         if ($patch_max && !defined $file_name) {
7313                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7314                         $paging_nav .= " &sdot; " .
7315                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7316                                         "patches");
7317                 }
7318         }
7319
7320         git_header_html();
7321         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7322         if (defined $file_name) {
7323                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7324         } else {
7325                 git_print_header_div('summary', $project)
7326         }
7327         git_print_page_path($file_name, $ftype, $hash_base)
7328                 if (defined $file_name);
7329
7330         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7331                      $file_name, $file_hash, $ftype);
7332
7333         git_footer_html();
7334 }
7335
7336 sub git_log {
7337         git_log_generic('log', \&git_log_body,
7338                         $hash, $hash_parent);
7339 }
7340
7341 sub git_commit {
7342         $hash ||= $hash_base || "HEAD";
7343         my %co = parse_commit($hash)
7344             or die_error(404, "Unknown commit object");
7345
7346         my $parent  = $co{'parent'};
7347         my $parents = $co{'parents'}; # listref
7348
7349         # we need to prepare $formats_nav before any parameter munging
7350         my $formats_nav;
7351         if (!defined $parent) {
7352                 # --root commitdiff
7353                 $formats_nav .= '(initial)';
7354         } elsif (@$parents == 1) {
7355                 # single parent commit
7356                 $formats_nav .=
7357                         '(parent: ' .
7358                         $cgi->a({-href => href(action=>"commit",
7359                                                hash=>$parent)},
7360                                 esc_html(substr($parent, 0, 7))) .
7361                         ')';
7362         } else {
7363                 # merge commit
7364                 $formats_nav .=
7365                         '(merge: ' .
7366                         join(' ', map {
7367                                 $cgi->a({-href => href(action=>"commit",
7368                                                        hash=>$_)},
7369                                         esc_html(substr($_, 0, 7)));
7370                         } @$parents ) .
7371                         ')';
7372         }
7373         if (gitweb_check_feature('patches') && @$parents <= 1) {
7374                 $formats_nav .= " | " .
7375                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7376                                 "patch");
7377         }
7378
7379         if (!defined $parent) {
7380                 $parent = "--root";
7381         }
7382         my @difftree;
7383         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7384                 @diff_opts,
7385                 (@$parents <= 1 ? $parent : '-c'),
7386                 $hash, "--"
7387                 or die_error(500, "Open git-diff-tree failed");
7388         @difftree = map { chomp; $_ } <$fd>;
7389         close $fd or die_error(404, "Reading git-diff-tree failed");
7390
7391         # non-textual hash id's can be cached
7392         my $expires;
7393         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7394                 $expires = "+1d";
7395         }
7396         my $refs = git_get_references();
7397         my $ref = format_ref_marker($refs, $co{'id'});
7398
7399         git_header_html(undef, $expires);
7400         git_print_page_nav('commit', '',
7401                            $hash, $co{'tree'}, $hash,
7402                            $formats_nav);
7403
7404         if (defined $co{'parent'}) {
7405                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7406         } else {
7407                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7408         }
7409         print "<div class=\"title_text\">\n" .
7410               "<table class=\"object_header\">\n";
7411         git_print_authorship_rows(\%co);
7412         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7413         print "<tr>" .
7414               "<td>tree</td>" .
7415               "<td class=\"sha1\">" .
7416               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7417                        class => "list"}, $co{'tree'}) .
7418               "</td>" .
7419               "<td class=\"link\">" .
7420               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7421                       "tree");
7422         my $snapshot_links = format_snapshot_links($hash);
7423         if (defined $snapshot_links) {
7424                 print " | " . $snapshot_links;
7425         }
7426         print "</td>" .
7427               "</tr>\n";
7428
7429         foreach my $par (@$parents) {
7430                 print "<tr>" .
7431                       "<td>parent</td>" .
7432                       "<td class=\"sha1\">" .
7433                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7434                                class => "list"}, $par) .
7435                       "</td>" .
7436                       "<td class=\"link\">" .
7437                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7438                       " | " .
7439                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7440                       "</td>" .
7441                       "</tr>\n";
7442         }
7443         print "</table>".
7444               "</div>\n";
7445
7446         print "<div class=\"page_body\">\n";
7447         git_print_log($co{'comment'});
7448         print "</div>\n";
7449
7450         git_difftree_body(\@difftree, $hash, @$parents);
7451
7452         git_footer_html();
7453 }
7454
7455 sub git_object {
7456         # object is defined by:
7457         # - hash or hash_base alone
7458         # - hash_base and file_name
7459         my $type;
7460
7461         # - hash or hash_base alone
7462         if ($hash || ($hash_base && !defined $file_name)) {
7463                 my $object_id = $hash || $hash_base;
7464
7465                 open my $fd, "-|", quote_command(
7466                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7467                         or die_error(404, "Object does not exist");
7468                 $type = <$fd>;
7469                 chomp $type;
7470                 close $fd
7471                         or die_error(404, "Object does not exist");
7472
7473         # - hash_base and file_name
7474         } elsif ($hash_base && defined $file_name) {
7475                 $file_name =~ s,/+$,,;
7476
7477                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7478                         or die_error(404, "Base object does not exist");
7479
7480                 # here errors should not hapen
7481                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7482                         or die_error(500, "Open git-ls-tree failed");
7483                 my $line = <$fd>;
7484                 close $fd;
7485
7486                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7487                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7488                         die_error(404, "File or directory for given base does not exist");
7489                 }
7490                 $type = $2;
7491                 $hash = $3;
7492         } else {
7493                 die_error(400, "Not enough information to find object");
7494         }
7495
7496         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7497                                           hash=>$hash, hash_base=>$hash_base,
7498                                           file_name=>$file_name),
7499                              -status => '302 Found');
7500 }
7501
7502 sub git_blobdiff {
7503         my $format = shift || 'html';
7504         my $diff_style = $input_params{'diff_style'} || 'inline';
7505
7506         my $fd;
7507         my @difftree;
7508         my %diffinfo;
7509         my $expires;
7510
7511         # preparing $fd and %diffinfo for git_patchset_body
7512         # new style URI
7513         if (defined $hash_base && defined $hash_parent_base) {
7514                 if (defined $file_name) {
7515                         # read raw output
7516                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7517                                 $hash_parent_base, $hash_base,
7518                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7519                                 or die_error(500, "Open git-diff-tree failed");
7520                         @difftree = map { chomp; $_ } <$fd>;
7521                         close $fd
7522                                 or die_error(404, "Reading git-diff-tree failed");
7523                         @difftree
7524                                 or die_error(404, "Blob diff not found");
7525
7526                 } elsif (defined $hash &&
7527                          $hash =~ /[0-9a-fA-F]{40}/) {
7528                         # try to find filename from $hash
7529
7530                         # read filtered raw output
7531                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7532                                 $hash_parent_base, $hash_base, "--"
7533                                 or die_error(500, "Open git-diff-tree failed");
7534                         @difftree =
7535                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7536                                 # $hash == to_id
7537                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7538                                 map { chomp; $_ } <$fd>;
7539                         close $fd
7540                                 or die_error(404, "Reading git-diff-tree failed");
7541                         @difftree
7542                                 or die_error(404, "Blob diff not found");
7543
7544                 } else {
7545                         die_error(400, "Missing one of the blob diff parameters");
7546                 }
7547
7548                 if (@difftree > 1) {
7549                         die_error(400, "Ambiguous blob diff specification");
7550                 }
7551
7552                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7553                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7554                 $file_name   ||= $diffinfo{'to_file'};
7555
7556                 $hash_parent ||= $diffinfo{'from_id'};
7557                 $hash        ||= $diffinfo{'to_id'};
7558
7559                 # non-textual hash id's can be cached
7560                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7561                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7562                         $expires = '+1d';
7563                 }
7564
7565                 # open patch output
7566                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7567                         '-p', ($format eq 'html' ? "--full-index" : ()),
7568                         $hash_parent_base, $hash_base,
7569                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7570                         or die_error(500, "Open git-diff-tree failed");
7571         }
7572
7573         # old/legacy style URI -- not generated anymore since 1.4.3.
7574         if (!%diffinfo) {
7575                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7576         }
7577
7578         # header
7579         if ($format eq 'html') {
7580                 my $formats_nav =
7581                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7582                                 "raw");
7583                 $formats_nav .= diff_style_nav($diff_style);
7584                 git_header_html(undef, $expires);
7585                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7586                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7587                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7588                 } else {
7589                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7590                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7591                 }
7592                 if (defined $file_name) {
7593                         git_print_page_path($file_name, "blob", $hash_base);
7594                 } else {
7595                         print "<div class=\"page_path\"></div>\n";
7596                 }
7597
7598         } elsif ($format eq 'plain') {
7599                 print $cgi->header(
7600                         -type => 'text/plain',
7601                         -charset => 'utf-8',
7602                         -expires => $expires,
7603                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7604
7605                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7606
7607         } else {
7608                 die_error(400, "Unknown blobdiff format");
7609         }
7610
7611         # patch
7612         if ($format eq 'html') {
7613                 print "<div class=\"page_body\">\n";
7614
7615                 git_patchset_body($fd, $diff_style,
7616                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7617                 close $fd;
7618
7619                 print "</div>\n"; # class="page_body"
7620                 git_footer_html();
7621
7622         } else {
7623                 while (my $line = <$fd>) {
7624                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7625                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7626
7627                         print $line;
7628
7629                         last if $line =~ m!^\+\+\+!;
7630                 }
7631                 local $/ = undef;
7632                 print <$fd>;
7633                 close $fd;
7634         }
7635 }
7636
7637 sub git_blobdiff_plain {
7638         git_blobdiff('plain');
7639 }
7640
7641 # assumes that it is added as later part of already existing navigation,
7642 # so it returns "| foo | bar" rather than just "foo | bar"
7643 sub diff_style_nav {
7644         my ($diff_style, $is_combined) = @_;
7645         $diff_style ||= 'inline';
7646
7647         return "" if ($is_combined);
7648
7649         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7650         my %styles = @styles;
7651         @styles =
7652                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7653
7654         return join '',
7655                 map { " | ".$_ }
7656                 map {
7657                         $_ eq $diff_style ? $styles{$_} :
7658                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7659                 } @styles;
7660 }
7661
7662 sub git_commitdiff {
7663         my %params = @_;
7664         my $format = $params{-format} || 'html';
7665         my $diff_style = $input_params{'diff_style'} || 'inline';
7666
7667         my ($patch_max) = gitweb_get_feature('patches');
7668         if ($format eq 'patch') {
7669                 die_error(403, "Patch view not allowed") unless $patch_max;
7670         }
7671
7672         $hash ||= $hash_base || "HEAD";
7673         my %co = parse_commit($hash)
7674             or die_error(404, "Unknown commit object");
7675
7676         # choose format for commitdiff for merge
7677         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7678                 $hash_parent = '--cc';
7679         }
7680         # we need to prepare $formats_nav before almost any parameter munging
7681         my $formats_nav;
7682         if ($format eq 'html') {
7683                 $formats_nav =
7684                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7685                                 "raw");
7686                 if ($patch_max && @{$co{'parents'}} <= 1) {
7687                         $formats_nav .= " | " .
7688                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7689                                         "patch");
7690                 }
7691                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7692
7693                 if (defined $hash_parent &&
7694                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7695                         # commitdiff with two commits given
7696                         my $hash_parent_short = $hash_parent;
7697                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7698                                 $hash_parent_short = substr($hash_parent, 0, 7);
7699                         }
7700                         $formats_nav .=
7701                                 ' (from';
7702                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7703                                 if ($co{'parents'}[$i] eq $hash_parent) {
7704                                         $formats_nav .= ' parent ' . ($i+1);
7705                                         last;
7706                                 }
7707                         }
7708                         $formats_nav .= ': ' .
7709                                 $cgi->a({-href => href(-replay=>1,
7710                                                        hash=>$hash_parent, hash_base=>undef)},
7711                                         esc_html($hash_parent_short)) .
7712                                 ')';
7713                 } elsif (!$co{'parent'}) {
7714                         # --root commitdiff
7715                         $formats_nav .= ' (initial)';
7716                 } elsif (scalar @{$co{'parents'}} == 1) {
7717                         # single parent commit
7718                         $formats_nav .=
7719                                 ' (parent: ' .
7720                                 $cgi->a({-href => href(-replay=>1,
7721                                                        hash=>$co{'parent'}, hash_base=>undef)},
7722                                         esc_html(substr($co{'parent'}, 0, 7))) .
7723                                 ')';
7724                 } else {
7725                         # merge commit
7726                         if ($hash_parent eq '--cc') {
7727                                 $formats_nav .= ' | ' .
7728                                         $cgi->a({-href => href(-replay=>1,
7729                                                                hash=>$hash, hash_parent=>'-c')},
7730                                                 'combined');
7731                         } else { # $hash_parent eq '-c'
7732                                 $formats_nav .= ' | ' .
7733                                         $cgi->a({-href => href(-replay=>1,
7734                                                                hash=>$hash, hash_parent=>'--cc')},
7735                                                 'compact');
7736                         }
7737                         $formats_nav .=
7738                                 ' (merge: ' .
7739                                 join(' ', map {
7740                                         $cgi->a({-href => href(-replay=>1,
7741                                                                hash=>$_, hash_base=>undef)},
7742                                                 esc_html(substr($_, 0, 7)));
7743                                 } @{$co{'parents'}} ) .
7744                                 ')';
7745                 }
7746         }
7747
7748         my $hash_parent_param = $hash_parent;
7749         if (!defined $hash_parent_param) {
7750                 # --cc for multiple parents, --root for parentless
7751                 $hash_parent_param =
7752                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7753         }
7754
7755         # read commitdiff
7756         my $fd;
7757         my @difftree;
7758         if ($format eq 'html') {
7759                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7760                         "--no-commit-id", "--patch-with-raw", "--full-index",
7761                         $hash_parent_param, $hash, "--"
7762                         or die_error(500, "Open git-diff-tree failed");
7763
7764                 while (my $line = <$fd>) {
7765                         chomp $line;
7766                         # empty line ends raw part of diff-tree output
7767                         last unless $line;
7768                         push @difftree, scalar parse_difftree_raw_line($line);
7769                 }
7770
7771         } elsif ($format eq 'plain') {
7772                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7773                         '-p', $hash_parent_param, $hash, "--"
7774                         or die_error(500, "Open git-diff-tree failed");
7775         } elsif ($format eq 'patch') {
7776                 # For commit ranges, we limit the output to the number of
7777                 # patches specified in the 'patches' feature.
7778                 # For single commits, we limit the output to a single patch,
7779                 # diverging from the git-format-patch default.
7780                 my @commit_spec = ();
7781                 if ($hash_parent) {
7782                         if ($patch_max > 0) {
7783                                 push @commit_spec, "-$patch_max";
7784                         }
7785                         push @commit_spec, '-n', "$hash_parent..$hash";
7786                 } else {
7787                         if ($params{-single}) {
7788                                 push @commit_spec, '-1';
7789                         } else {
7790                                 if ($patch_max > 0) {
7791                                         push @commit_spec, "-$patch_max";
7792                                 }
7793                                 push @commit_spec, "-n";
7794                         }
7795                         push @commit_spec, '--root', $hash;
7796                 }
7797                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7798                         '--encoding=utf8', '--stdout', @commit_spec
7799                         or die_error(500, "Open git-format-patch failed");
7800         } else {
7801                 die_error(400, "Unknown commitdiff format");
7802         }
7803
7804         # non-textual hash id's can be cached
7805         my $expires;
7806         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7807                 $expires = "+1d";
7808         }
7809
7810         # write commit message
7811         if ($format eq 'html') {
7812                 my $refs = git_get_references();
7813                 my $ref = format_ref_marker($refs, $co{'id'});
7814
7815                 git_header_html(undef, $expires);
7816                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7817                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7818                 print "<div class=\"title_text\">\n" .
7819                       "<table class=\"object_header\">\n";
7820                 git_print_authorship_rows(\%co);
7821                 print "</table>".
7822                       "</div>\n";
7823                 print "<div class=\"page_body\">\n";
7824                 if (@{$co{'comment'}} > 1) {
7825                         print "<div class=\"log\">\n";
7826                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7827                         print "</div>\n"; # class="log"
7828                 }
7829
7830         } elsif ($format eq 'plain') {
7831                 my $refs = git_get_references("tags");
7832                 my $tagname = git_get_rev_name_tags($hash);
7833                 my $filename = basename($project) . "-$hash.patch";
7834
7835                 print $cgi->header(
7836                         -type => 'text/plain',
7837                         -charset => 'utf-8',
7838                         -expires => $expires,
7839                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7840                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7841                 print "From: " . to_utf8($co{'author'}) . "\n";
7842                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7843                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7844
7845                 print "X-Git-Tag: $tagname\n" if $tagname;
7846                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7847
7848                 foreach my $line (@{$co{'comment'}}) {
7849                         print to_utf8($line) . "\n";
7850                 }
7851                 print "---\n\n";
7852         } elsif ($format eq 'patch') {
7853                 my $filename = basename($project) . "-$hash.patch";
7854
7855                 print $cgi->header(
7856                         -type => 'text/plain',
7857                         -charset => 'utf-8',
7858                         -expires => $expires,
7859                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7860         }
7861
7862         # write patch
7863         if ($format eq 'html') {
7864                 my $use_parents = !defined $hash_parent ||
7865                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7866                 git_difftree_body(\@difftree, $hash,
7867                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7868                 print "<br/>\n";
7869
7870                 git_patchset_body($fd, $diff_style,
7871                                   \@difftree, $hash,
7872                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7873                 close $fd;
7874                 print "</div>\n"; # class="page_body"
7875                 git_footer_html();
7876
7877         } elsif ($format eq 'plain') {
7878                 local $/ = undef;
7879                 print <$fd>;
7880                 close $fd
7881                         or print "Reading git-diff-tree failed\n";
7882         } elsif ($format eq 'patch') {
7883                 local $/ = undef;
7884                 print <$fd>;
7885                 close $fd
7886                         or print "Reading git-format-patch failed\n";
7887         }
7888 }
7889
7890 sub git_commitdiff_plain {
7891         git_commitdiff(-format => 'plain');
7892 }
7893
7894 # format-patch-style patches
7895 sub git_patch {
7896         git_commitdiff(-format => 'patch', -single => 1);
7897 }
7898
7899 sub git_patches {
7900         git_commitdiff(-format => 'patch');
7901 }
7902
7903 sub git_history {
7904         git_log_generic('history', \&git_history_body,
7905                         $hash_base, $hash_parent_base,
7906                         $file_name, $hash);
7907 }
7908
7909 sub git_search {
7910         $searchtype ||= 'commit';
7911
7912         # check if appropriate features are enabled
7913         gitweb_check_feature('search')
7914                 or die_error(403, "Search is disabled");
7915         if ($searchtype eq 'pickaxe') {
7916                 # pickaxe may take all resources of your box and run for several minutes
7917                 # with every query - so decide by yourself how public you make this feature
7918                 gitweb_check_feature('pickaxe')
7919                         or die_error(403, "Pickaxe search is disabled");
7920         }
7921         if ($searchtype eq 'grep') {
7922                 # grep search might be potentially CPU-intensive, too
7923                 gitweb_check_feature('grep')
7924                         or die_error(403, "Grep search is disabled");
7925         }
7926
7927         if (!defined $searchtext) {
7928                 die_error(400, "Text field is empty");
7929         }
7930         if (!defined $hash) {
7931                 $hash = git_get_head_hash($project);
7932         }
7933         my %co = parse_commit($hash);
7934         if (!%co) {
7935                 die_error(404, "Unknown commit object");
7936         }
7937         if (!defined $page) {
7938                 $page = 0;
7939         }
7940
7941         if ($searchtype eq 'commit' ||
7942             $searchtype eq 'author' ||
7943             $searchtype eq 'committer') {
7944                 git_search_message(%co);
7945         } elsif ($searchtype eq 'pickaxe') {
7946                 git_search_changes(%co);
7947         } elsif ($searchtype eq 'grep') {
7948                 git_search_files(%co);
7949         } else {
7950                 die_error(400, "Unknown search type");
7951         }
7952 }
7953
7954 sub git_search_help {
7955         git_header_html();
7956         git_print_page_nav('','', $hash,$hash,$hash);
7957         print <<EOT;
7958 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7959 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7960 the pattern entered is recognized as the POSIX extended
7961 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7962 insensitive).</p>
7963 <dl>
7964 <dt><b>commit</b></dt>
7965 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7966 EOT
7967         my $have_grep = gitweb_check_feature('grep');
7968         if ($have_grep) {
7969                 print <<EOT;
7970 <dt><b>grep</b></dt>
7971 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7972     a different one) are searched for the given pattern. On large trees, this search can take
7973 a while and put some strain on the server, so please use it with some consideration. Note that
7974 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7975 case-sensitive.</dd>
7976 EOT
7977         }
7978         print <<EOT;
7979 <dt><b>author</b></dt>
7980 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7981 <dt><b>committer</b></dt>
7982 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7983 EOT
7984         my $have_pickaxe = gitweb_check_feature('pickaxe');
7985         if ($have_pickaxe) {
7986                 print <<EOT;
7987 <dt><b>pickaxe</b></dt>
7988 <dd>All commits that caused the string to appear or disappear from any file (changes that
7989 added, removed or "modified" the string) will be listed. This search can take a while and
7990 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7991 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7992 EOT
7993         }
7994         print "</dl>\n";
7995         git_footer_html();
7996 }
7997
7998 sub git_shortlog {
7999         git_log_generic('shortlog', \&git_shortlog_body,
8000                         $hash, $hash_parent);
8001 }
8002
8003 ## ......................................................................
8004 ## feeds (RSS, Atom; OPML)
8005
8006 sub git_feed {
8007         my $format = shift || 'atom';
8008         my $have_blame = gitweb_check_feature('blame');
8009
8010         # Atom: http://www.atomenabled.org/developers/syndication/
8011         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8012         if ($format ne 'rss' && $format ne 'atom') {
8013                 die_error(400, "Unknown web feed format");
8014         }
8015
8016         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8017         my $head = $hash || 'HEAD';
8018         my @commitlist = parse_commits($head, 150, 0, $file_name);
8019
8020         my %latest_commit;
8021         my %latest_date;
8022         my $content_type = "application/$format+xml";
8023         if (defined $cgi->http('HTTP_ACCEPT') &&
8024                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8025                 # browser (feed reader) prefers text/xml
8026                 $content_type = 'text/xml';
8027         }
8028         if (defined($commitlist[0])) {
8029                 %latest_commit = %{$commitlist[0]};
8030                 my $latest_epoch = $latest_commit{'committer_epoch'};
8031                 exit_if_unmodified_since($latest_epoch);
8032                 %latest_date = parse_date($latest_epoch, $latest_commit{'comitter_tz'});
8033         }
8034         print $cgi->header(
8035                 -type => $content_type,
8036                 -charset => 'utf-8',
8037                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8038                 -status => '200 OK');
8039
8040         # Optimization: skip generating the body if client asks only
8041         # for Last-Modified date.
8042         return if ($cgi->request_method() eq 'HEAD');
8043
8044         # header variables
8045         my $title = "$site_name - $project/$action";
8046         my $feed_type = 'log';
8047         if (defined $hash) {
8048                 $title .= " - '$hash'";
8049                 $feed_type = 'branch log';
8050                 if (defined $file_name) {
8051                         $title .= " :: $file_name";
8052                         $feed_type = 'history';
8053                 }
8054         } elsif (defined $file_name) {
8055                 $title .= " - $file_name";
8056                 $feed_type = 'history';
8057         }
8058         $title .= " $feed_type";
8059         my $descr = git_get_project_description($project);
8060         if (defined $descr) {
8061                 $descr = esc_html($descr);
8062         } else {
8063                 $descr = "$project " .
8064                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8065                          " feed";
8066         }
8067         my $owner = git_get_project_owner($project);
8068         $owner = esc_html($owner);
8069
8070         #header
8071         my $alt_url;
8072         if (defined $file_name) {
8073                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8074         } elsif (defined $hash) {
8075                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8076         } else {
8077                 $alt_url = href(-full=>1, action=>"summary");
8078         }
8079         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8080         if ($format eq 'rss') {
8081                 print <<XML;
8082 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8083 <channel>
8084 XML
8085                 print "<title>$title</title>\n" .
8086                       "<link>$alt_url</link>\n" .
8087                       "<description>$descr</description>\n" .
8088                       "<language>en</language>\n" .
8089                       # project owner is responsible for 'editorial' content
8090                       "<managingEditor>$owner</managingEditor>\n";
8091                 if (defined $logo || defined $favicon) {
8092                         # prefer the logo to the favicon, since RSS
8093                         # doesn't allow both
8094                         my $img = esc_url($logo || $favicon);
8095                         print "<image>\n" .
8096                               "<url>$img</url>\n" .
8097                               "<title>$title</title>\n" .
8098                               "<link>$alt_url</link>\n" .
8099                               "</image>\n";
8100                 }
8101                 if (%latest_date) {
8102                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8103                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8104                 }
8105                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8106         } elsif ($format eq 'atom') {
8107                 print <<XML;
8108 <feed xmlns="http://www.w3.org/2005/Atom">
8109 XML
8110                 print "<title>$title</title>\n" .
8111                       "<subtitle>$descr</subtitle>\n" .
8112                       '<link rel="alternate" type="text/html" href="' .
8113                       $alt_url . '" />' . "\n" .
8114                       '<link rel="self" type="' . $content_type . '" href="' .
8115                       $cgi->self_url() . '" />' . "\n" .
8116                       "<id>" . href(-full=>1) . "</id>\n" .
8117                       # use project owner for feed author
8118                       "<author><name>$owner</name></author>\n";
8119                 if (defined $favicon) {
8120                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8121                 }
8122                 if (defined $logo) {
8123                         # not twice as wide as tall: 72 x 27 pixels
8124                         print "<logo>" . esc_url($logo) . "</logo>\n";
8125                 }
8126                 if (! %latest_date) {
8127                         # dummy date to keep the feed valid until commits trickle in:
8128                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8129                 } else {
8130                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8131                 }
8132                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8133         }
8134
8135         # contents
8136         for (my $i = 0; $i <= $#commitlist; $i++) {
8137                 my %co = %{$commitlist[$i]};
8138                 my $commit = $co{'id'};
8139                 # we read 150, we always show 30 and the ones more recent than 48 hours
8140                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8141                         last;
8142                 }
8143                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8144
8145                 # get list of changed files
8146                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8147                         $co{'parent'} || "--root",
8148                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8149                         or next;
8150                 my @difftree = map { chomp; $_ } <$fd>;
8151                 close $fd
8152                         or next;
8153
8154                 # print element (entry, item)
8155                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8156                 if ($format eq 'rss') {
8157                         print "<item>\n" .
8158                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8159                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8160                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8161                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8162                               "<link>$co_url</link>\n" .
8163                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8164                               "<content:encoded>" .
8165                               "<![CDATA[\n";
8166                 } elsif ($format eq 'atom') {
8167                         print "<entry>\n" .
8168                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8169                               "<updated>$cd{'iso-8601'}</updated>\n" .
8170                               "<author>\n" .
8171                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8172                         if ($co{'author_email'}) {
8173                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8174                         }
8175                         print "</author>\n" .
8176                               # use committer for contributor
8177                               "<contributor>\n" .
8178                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8179                         if ($co{'committer_email'}) {
8180                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8181                         }
8182                         print "</contributor>\n" .
8183                               "<published>$cd{'iso-8601'}</published>\n" .
8184                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8185                               "<id>$co_url</id>\n" .
8186                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8187                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8188                 }
8189                 my $comment = $co{'comment'};
8190                 print "<pre>\n";
8191                 foreach my $line (@$comment) {
8192                         $line = esc_html($line);
8193                         print "$line\n";
8194                 }
8195                 print "</pre><ul>\n";
8196                 foreach my $difftree_line (@difftree) {
8197                         my %difftree = parse_difftree_raw_line($difftree_line);
8198                         next if !$difftree{'from_id'};
8199
8200                         my $file = $difftree{'file'} || $difftree{'to_file'};
8201
8202                         print "<li>" .
8203                               "[" .
8204                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8205                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8206                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8207                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8208                                       -title => "diff"}, 'D');
8209                         if ($have_blame) {
8210                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8211                                                              file_name=>$file, hash_base=>$commit),
8212                                               -title => "blame"}, 'B');
8213                         }
8214                         # if this is not a feed of a file history
8215                         if (!defined $file_name || $file_name ne $file) {
8216                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8217                                                              file_name=>$file, hash=>$commit),
8218                                               -title => "history"}, 'H');
8219                         }
8220                         $file = esc_path($file);
8221                         print "] ".
8222                               "$file</li>\n";
8223                 }
8224                 if ($format eq 'rss') {
8225                         print "</ul>]]>\n" .
8226                               "</content:encoded>\n" .
8227                               "</item>\n";
8228                 } elsif ($format eq 'atom') {
8229                         print "</ul>\n</div>\n" .
8230                               "</content>\n" .
8231                               "</entry>\n";
8232                 }
8233         }
8234
8235         # end of feed
8236         if ($format eq 'rss') {
8237                 print "</channel>\n</rss>\n";
8238         } elsif ($format eq 'atom') {
8239                 print "</feed>\n";
8240         }
8241 }
8242
8243 sub git_rss {
8244         git_feed('rss');
8245 }
8246
8247 sub git_atom {
8248         git_feed('atom');
8249 }
8250
8251 sub git_opml {
8252         my @list = git_get_projects_list($project_filter, $strict_export);
8253         if (!@list) {
8254                 die_error(404, "No projects found");
8255         }
8256
8257         print $cgi->header(
8258                 -type => 'text/xml',
8259                 -charset => 'utf-8',
8260                 -content_disposition => 'inline; filename="opml.xml"');
8261
8262         my $title = esc_html($site_name);
8263         my $filter = " within subdirectory ";
8264         if (defined $project_filter) {
8265                 $filter .= esc_html($project_filter);
8266         } else {
8267                 $filter = "";
8268         }
8269         print <<XML;
8270 <?xml version="1.0" encoding="utf-8"?>
8271 <opml version="1.0">
8272 <head>
8273   <title>$title OPML Export$filter</title>
8274 </head>
8275 <body>
8276 <outline text="git RSS feeds">
8277 XML
8278
8279         foreach my $pr (@list) {
8280                 my %proj = %$pr;
8281                 my $head = git_get_head_hash($proj{'path'});
8282                 if (!defined $head) {
8283                         next;
8284                 }
8285                 $git_dir = "$projectroot/$proj{'path'}";
8286                 my %co = parse_commit($head);
8287                 if (!%co) {
8288                         next;
8289                 }
8290
8291                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8292                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8293                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8294                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8295         }
8296         print <<XML;
8297 </outline>
8298 </body>
8299 </opml>
8300 XML
8301 }