gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 # handle ACL in file access tests
  14 use filetest 'access';
  15 use CGI qw(:standard :escapeHTML -nosticky);
  16 use CGI::Util qw(unescape);
  17 use CGI::Carp qw(fatalsToBrowser set_message);
  18 use Encode;
  19 use Fcntl ':mode';
  20 use File::Find qw();
  21 use File::Basename qw(basename);
  22 use Time::HiRes qw(gettimeofday tv_interval);
  23 binmode STDOUT, ':utf8';
  24
  25 if (!defined($CGI::VERSION) || $CGI::VERSION < 4.08) {
  26         eval 'sub CGI::multi_param { CGI::param(@_) }'
  27 }
  28
  29 our $t0 = [ gettimeofday() ];
  30 our $number_of_git_cmds = 0;
  31
  32 BEGIN {
  33         CGI->compile() if $ENV{'MOD_PERL'};
  34 }
  35
  36 our $version = "++GIT_VERSION++";
  37
  38 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  39 sub evaluate_uri {
  40         our $cgi;
  41
  42         our $my_url = $cgi->url();
  43         our $my_uri = $cgi->url(-absolute => 1);
  44
  45         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  46         # needed and used only for URLs with nonempty PATH_INFO
  47         our $base_url = $my_url;
  48
  49         # When the script is used as DirectoryIndex, the URL does not contain the name
  50         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  51         # have to do it ourselves. We make $path_info global because it's also used
  52         # later on.
  53         #
  54         # Another issue with the script being the DirectoryIndex is that the resulting
  55         # $my_url data is not the full script URL: this is good, because we want
  56         # generated links to keep implying the script name if it wasn't explicitly
  57         # indicated in the URL we're handling, but it means that $my_url cannot be used
  58         # as base URL.
  59         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  60         # to build the base URL ourselves:
  61         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  62         if ($path_info) {
  63                 # $path_info has already been URL-decoded by the web server, but
  64                 # $my_url and $my_uri have not. URL-decode them so we can properly
  65                 # strip $path_info.
  66                 $my_url = unescape($my_url);
  67                 $my_uri = unescape($my_uri);
  68                 if ($my_url =~ s,\Q$path_info\E$,, &&
  69                     $my_uri =~ s,\Q$path_info\E$,, &&
  70                     defined $ENV{'SCRIPT_NAME'}) {
  71                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  72                 }
  73         }
  74
  75         # target of the home link on top of all pages
  76         our $home_link = $my_uri || "/";
  77 }
  78
  79 # core git executable to use
  80 # this can just be "git" if your webserver has a sensible PATH
  81 our $GIT = "++GIT_BINDIR++/git";
  82
  83 # absolute fs-path which will be prepended to the project path
  84 #our $projectroot = "/pub/scm";
  85 our $projectroot = "++GITWEB_PROJECTROOT++";
  86
  87 # fs traversing limit for getting project list
  88 # the number is relative to the projectroot
  89 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  90
  91 # string of the home link on top of all pages
  92 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  93
  94 # extra breadcrumbs preceding the home link
  95 our @extra_breadcrumbs = ();
  96
  97 # name of your site or organization to appear in page titles
  98 # replace this with something more descriptive for clearer bookmarks
  99 our $site_name = "++GITWEB_SITENAME++"
 100                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
 101
 102 # html snippet to include in the <head> section of each page
 103 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
 104 # filename of html text to include at top of each page
 105 our $site_header = "++GITWEB_SITE_HEADER++";
 106 # html text to include at home page
 107 our $home_text = "++GITWEB_HOMETEXT++";
 108 # filename of html text to include at bottom of each page
 109 our $site_footer = "++GITWEB_SITE_FOOTER++";
 110
 111 # URI of stylesheets
 112 our @stylesheets = ("++GITWEB_CSS++");
 113 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 114 our $stylesheet = undef;
 115 # URI of GIT logo (72x27 size)
 116 our $logo = "++GITWEB_LOGO++";
 117 # URI of GIT favicon, assumed to be image/png type
 118 our $favicon = "++GITWEB_FAVICON++";
 119 # URI of gitweb.js (JavaScript code for gitweb)
 120 our $javascript = "++GITWEB_JS++";
 121
 122 # URI and label (title) of GIT logo link
 123 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 124 #our $logo_label = "git documentation";
 125 our $logo_url = "http://git-scm.com/";
 126 our $logo_label = "git homepage";
 127
 128 # source of projects list
 129 our $projects_list = "++GITWEB_LIST++";
 130
 131 # the width (in characters) of the projects list "Description" column
 132 our $projects_list_description_width = 25;
 133
 134 # group projects by category on the projects list
 135 # (enabled if this variable evaluates to true)
 136 our $projects_list_group_categories = 0;
 137
 138 # default category if none specified
 139 # (leave the empty string for no category)
 140 our $project_list_default_category = "";
 141
 142 # default order of projects list
 143 # valid values are none, project, descr, owner, and age
 144 our $default_projects_order = "project";
 145
 146 # show repository only if this file exists
 147 # (only effective if this variable evaluates to true)
 148 our $export_ok = "++GITWEB_EXPORT_OK++";
 149
 150 # don't generate age column on the projects list page
 151 our $omit_age_column = 0;
 152
 153 # don't generate information about owners of repositories
 154 our $omit_owner=0;
 155
 156 # show repository only if this subroutine returns true
 157 # when given the path to the project, for example:
 158 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 159 our $export_auth_hook = undef;
 160
 161 # only allow viewing of repositories also shown on the overview page
 162 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 163
 164 # list of git base URLs used for URL to where fetch project from,
 165 # i.e. full URL is "$git_base_url/$project"
 166 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 167
 168 # default blob_plain mimetype and default charset for text/plain blob
 169 our $default_blob_plain_mimetype = 'text/plain';
 170 our $default_text_plain_charset  = undef;
 171
 172 # file to use for guessing MIME types before trying /etc/mime.types
 173 # (relative to the current git repository)
 174 our $mimetypes_file = undef;
 175
 176 # assume this charset if line contains non-UTF-8 characters;
 177 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 178 # for which encoding all byte sequences are valid, for example
 179 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 180 # could be even 'utf-8' for the old behavior)
 181 our $fallback_encoding = 'latin1';
 182
 183 # rename detection options for git-diff and git-diff-tree
 184 # - default is '-M', with the cost proportional to
 185 #   (number of removed files) * (number of new files).
 186 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 187 #   (number of changed files + number of removed files) * (number of new files)
 188 # - even more costly is '-C', '--find-copies-harder' with cost
 189 #   (number of files in the original tree) * (number of new files)
 190 # - one might want to include '-B' option, e.g. '-B', '-M'
 191 our @diff_opts = ('-M'); # taken from git_commit
 192
 193 # Disables features that would allow repository owners to inject script into
 194 # the gitweb domain.
 195 our $prevent_xss = 0;
 196
 197 # Path to the highlight executable to use (must be the one from
 198 # http://www.andre-simon.de due to assumptions about parameters and output).
 199 # Useful if highlight is not installed on your webserver's PATH.
 200 # [Default: highlight]
 201 our $highlight_bin = "++HIGHLIGHT_BIN++";
 202
 203 # information about snapshot formats that gitweb is capable of serving
 204 our %known_snapshot_formats = (
 205         # name => {
 206         #       'display' => display name,
 207         #       'type' => mime type,
 208         #       'suffix' => filename suffix,
 209         #       'format' => --format for git-archive,
 210         #       'compressor' => [compressor command and arguments]
 211         #                       (array reference, optional)
 212         #       'disabled' => boolean (optional)}
 213         #
 214         'tgz' => {
 215                 'display' => 'tar.gz',
 216                 'type' => 'application/x-gzip',
 217                 'suffix' => '.tar.gz',
 218                 'format' => 'tar',
 219                 'compressor' => ['gzip', '-n']},
 220
 221         'tbz2' => {
 222                 'display' => 'tar.bz2',
 223                 'type' => 'application/x-bzip2',
 224                 'suffix' => '.tar.bz2',
 225                 'format' => 'tar',
 226                 'compressor' => ['bzip2']},
 227
 228         'txz' => {
 229                 'display' => 'tar.xz',
 230                 'type' => 'application/x-xz',
 231                 'suffix' => '.tar.xz',
 232                 'format' => 'tar',
 233                 'compressor' => ['xz'],
 234                 'disabled' => 1},
 235
 236         'zip' => {
 237                 'display' => 'zip',
 238                 'type' => 'application/x-zip',
 239                 'suffix' => '.zip',
 240                 'format' => 'zip'},
 241 );
 242
 243 # Aliases so we understand old gitweb.snapshot values in repository
 244 # configuration.
 245 our %known_snapshot_format_aliases = (
 246         'gzip'  => 'tgz',
 247         'bzip2' => 'tbz2',
 248         'xz'    => 'txz',
 249
 250         # backward compatibility: legacy gitweb config support
 251         'x-gzip' => undef, 'gz' => undef,
 252         'x-bzip2' => undef, 'bz2' => undef,
 253         'x-zip' => undef, '' => undef,
 254 );
 255
 256 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 257 # are changed, it may be appropriate to change these values too via
 258 # $GITWEB_CONFIG.
 259 our %avatar_size = (
 260         'default' => 16,
 261         'double'  => 32
 262 );
 263
 264 # Used to set the maximum load that we will still respond to gitweb queries.
 265 # If server load exceed this value then return "503 server busy" error.
 266 # If gitweb cannot determined server load, it is taken to be 0.
 267 # Leave it undefined (or set to 'undef') to turn off load checking.
 268 our $maxload = 300;
 269
 270 # configuration for 'highlight' (http://www.andre-simon.de/)
 271 # match by basename
 272 our %highlight_basename = (
 273         #'Program' => 'py',
 274         #'Library' => 'py',
 275         'SConstruct' => 'py', # SCons equivalent of Makefile
 276         'Makefile' => 'make',
 277 );
 278 # match by extension
 279 our %highlight_ext = (
 280         # main extensions, defining name of syntax;
 281         # see files in /usr/share/highlight/langDefs/ directory
 282         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 283         # alternate extensions, see /etc/highlight/filetypes.conf
 284         (map { $_ => 'c'   } qw(c h)),
 285         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 286         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 287         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 288         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 289         (map { $_ => 'make'} qw(make mak mk)),
 290         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 291 );
 292
 293 # You define site-wide feature defaults here; override them with
 294 # $GITWEB_CONFIG as necessary.
 295 our %feature = (
 296         # feature => {
 297         #       'sub' => feature-sub (subroutine),
 298         #       'override' => allow-override (boolean),
 299         #       'default' => [ default options...] (array reference)}
 300         #
 301         # if feature is overridable (it means that allow-override has true value),
 302         # then feature-sub will be called with default options as parameters;
 303         # return value of feature-sub indicates if to enable specified feature
 304         #
 305         # if there is no 'sub' key (no feature-sub), then feature cannot be
 306         # overridden
 307         #
 308         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 309         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 310         # is enabled
 311
 312         # Enable the 'blame' blob view, showing the last commit that modified
 313         # each line in the file. This can be very CPU-intensive.
 314
 315         # To enable system wide have in $GITWEB_CONFIG
 316         # $feature{'blame'}{'default'} = [1];
 317         # To have project specific config enable override in $GITWEB_CONFIG
 318         # $feature{'blame'}{'override'} = 1;
 319         # and in project config gitweb.blame = 0|1;
 320         'blame' => {
 321                 'sub' => sub { feature_bool('blame', @_) },
 322                 'override' => 0,
 323                 'default' => [0]},
 324
 325         # Enable the 'snapshot' link, providing a compressed archive of any
 326         # tree. This can potentially generate high traffic if you have large
 327         # project.
 328
 329         # Value is a list of formats defined in %known_snapshot_formats that
 330         # you wish to offer.
 331         # To disable system wide have in $GITWEB_CONFIG
 332         # $feature{'snapshot'}{'default'} = [];
 333         # To have project specific config enable override in $GITWEB_CONFIG
 334         # $feature{'snapshot'}{'override'} = 1;
 335         # and in project config, a comma-separated list of formats or "none"
 336         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 337         'snapshot' => {
 338                 'sub' => \&feature_snapshot,
 339                 'override' => 0,
 340                 'default' => ['tgz']},
 341
 342         # Enable text search, which will list the commits which match author,
 343         # committer or commit text to a given string.  Enabled by default.
 344         # Project specific override is not supported.
 345         #
 346         # Note that this controls all search features, which means that if
 347         # it is disabled, then 'grep' and 'pickaxe' search would also be
 348         # disabled.
 349         'search' => {
 350                 'override' => 0,
 351                 'default' => [1]},
 352
 353         # Enable grep search, which will list the files in currently selected
 354         # tree containing the given string. Enabled by default. This can be
 355         # potentially CPU-intensive, of course.
 356         # Note that you need to have 'search' feature enabled too.
 357
 358         # To enable system wide have in $GITWEB_CONFIG
 359         # $feature{'grep'}{'default'} = [1];
 360         # To have project specific config enable override in $GITWEB_CONFIG
 361         # $feature{'grep'}{'override'} = 1;
 362         # and in project config gitweb.grep = 0|1;
 363         'grep' => {
 364                 'sub' => sub { feature_bool('grep', @_) },
 365                 'override' => 0,
 366                 'default' => [1]},
 367
 368         # Enable the pickaxe search, which will list the commits that modified
 369         # a given string in a file. This can be practical and quite faster
 370         # alternative to 'blame', but still potentially CPU-intensive.
 371         # Note that you need to have 'search' feature enabled too.
 372
 373         # To enable system wide have in $GITWEB_CONFIG
 374         # $feature{'pickaxe'}{'default'} = [1];
 375         # To have project specific config enable override in $GITWEB_CONFIG
 376         # $feature{'pickaxe'}{'override'} = 1;
 377         # and in project config gitweb.pickaxe = 0|1;
 378         'pickaxe' => {
 379                 'sub' => sub { feature_bool('pickaxe', @_) },
 380                 'override' => 0,
 381                 'default' => [1]},
 382
 383         # Enable showing size of blobs in a 'tree' view, in a separate
 384         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 385
 386         # To disable system wide have in $GITWEB_CONFIG
 387         # $feature{'show-sizes'}{'default'} = [0];
 388         # To have project specific config enable override in $GITWEB_CONFIG
 389         # $feature{'show-sizes'}{'override'} = 1;
 390         # and in project config gitweb.showsizes = 0|1;
 391         'show-sizes' => {
 392                 'sub' => sub { feature_bool('showsizes', @_) },
 393                 'override' => 0,
 394                 'default' => [1]},
 395
 396         # Make gitweb use an alternative format of the URLs which can be
 397         # more readable and natural-looking: project name is embedded
 398         # directly in the path and the query string contains other
 399         # auxiliary information. All gitweb installations recognize
 400         # URL in either format; this configures in which formats gitweb
 401         # generates links.
 402
 403         # To enable system wide have in $GITWEB_CONFIG
 404         # $feature{'pathinfo'}{'default'} = [1];
 405         # Project specific override is not supported.
 406
 407         # Note that you will need to change the default location of CSS,
 408         # favicon, logo and possibly other files to an absolute URL. Also,
 409         # if gitweb.cgi serves as your indexfile, you will need to force
 410         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 411         'pathinfo' => {
 412                 'override' => 0,
 413                 'default' => [0]},
 414
 415         # Make gitweb consider projects in project root subdirectories
 416         # to be forks of existing projects. Given project $projname.git,
 417         # projects matching $projname/*.git will not be shown in the main
 418         # projects list, instead a '+' mark will be added to $projname
 419         # there and a 'forks' view will be enabled for the project, listing
 420         # all the forks. If project list is taken from a file, forks have
 421         # to be listed after the main project.
 422
 423         # To enable system wide have in $GITWEB_CONFIG
 424         # $feature{'forks'}{'default'} = [1];
 425         # Project specific override is not supported.
 426         'forks' => {
 427                 'override' => 0,
 428                 'default' => [0]},
 429
 430         # Insert custom links to the action bar of all project pages.
 431         # This enables you mainly to link to third-party scripts integrating
 432         # into gitweb; e.g. git-browser for graphical history representation
 433         # or custom web-based repository administration interface.
 434
 435         # The 'default' value consists of a list of triplets in the form
 436         # (label, link, position) where position is the label after which
 437         # to insert the link and link is a format string where %n expands
 438         # to the project name, %f to the project path within the filesystem,
 439         # %h to the current hash (h gitweb parameter) and %b to the current
 440         # hash base (hb gitweb parameter); %% expands to %.
 441
 442         # To enable system wide have in $GITWEB_CONFIG e.g.
 443         # $feature{'actions'}{'default'} = [('graphiclog',
 444         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 445         # Project specific override is not supported.
 446         'actions' => {
 447                 'override' => 0,
 448                 'default' => []},
 449
 450         # Allow gitweb scan project content tags of project repository,
 451         # and display the popular Web 2.0-ish "tag cloud" near the projects
 452         # list.  Note that this is something COMPLETELY different from the
 453         # normal Git tags.
 454
 455         # gitweb by itself can show existing tags, but it does not handle
 456         # tagging itself; you need to do it externally, outside gitweb.
 457         # The format is described in git_get_project_ctags() subroutine.
 458         # You may want to install the HTML::TagCloud Perl module to get
 459         # a pretty tag cloud instead of just a list of tags.
 460
 461         # To enable system wide have in $GITWEB_CONFIG
 462         # $feature{'ctags'}{'default'} = [1];
 463         # Project specific override is not supported.
 464
 465         # In the future whether ctags editing is enabled might depend
 466         # on the value, but using 1 should always mean no editing of ctags.
 467         'ctags' => {
 468                 'override' => 0,
 469                 'default' => [0]},
 470
 471         # The maximum number of patches in a patchset generated in patch
 472         # view. Set this to 0 or undef to disable patch view, or to a
 473         # negative number to remove any limit.
 474
 475         # To disable system wide have in $GITWEB_CONFIG
 476         # $feature{'patches'}{'default'} = [0];
 477         # To have project specific config enable override in $GITWEB_CONFIG
 478         # $feature{'patches'}{'override'} = 1;
 479         # and in project config gitweb.patches = 0|n;
 480         # where n is the maximum number of patches allowed in a patchset.
 481         'patches' => {
 482                 'sub' => \&feature_patches,
 483                 'override' => 0,
 484                 'default' => [16]},
 485
 486         # Avatar support. When this feature is enabled, views such as
 487         # shortlog or commit will display an avatar associated with
 488         # the email of the committer(s) and/or author(s).
 489
 490         # Currently available providers are gravatar and picon.
 491         # If an unknown provider is specified, the feature is disabled.
 492
 493         # Gravatar depends on Digest::MD5.
 494         # Picon currently relies on the indiana.edu database.
 495
 496         # To enable system wide have in $GITWEB_CONFIG
 497         # $feature{'avatar'}{'default'} = ['<provider>'];
 498         # where <provider> is either gravatar or picon.
 499         # To have project specific config enable override in $GITWEB_CONFIG
 500         # $feature{'avatar'}{'override'} = 1;
 501         # and in project config gitweb.avatar = <provider>;
 502         'avatar' => {
 503                 'sub' => \&feature_avatar,
 504                 'override' => 0,
 505                 'default' => ['']},
 506
 507         # Enable displaying how much time and how many git commands
 508         # it took to generate and display page.  Disabled by default.
 509         # Project specific override is not supported.
 510         'timed' => {
 511                 'override' => 0,
 512                 'default' => [0]},
 513
 514         # Enable turning some links into links to actions which require
 515         # JavaScript to run (like 'blame_incremental').  Not enabled by
 516         # default.  Project specific override is currently not supported.
 517         'javascript-actions' => {
 518                 'override' => 0,
 519                 'default' => [0]},
 520
 521         # Enable and configure ability to change common timezone for dates
 522         # in gitweb output via JavaScript.  Enabled by default.
 523         # Project specific override is not supported.
 524         'javascript-timezone' => {
 525                 'override' => 0,
 526                 'default' => [
 527                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 528                                      # or undef to turn off this feature
 529                         'gitweb_tz', # name of cookie where to store selected timezone
 530                         'datetime',  # CSS class used to mark up dates for manipulation
 531                 ]},
 532
 533         # Syntax highlighting support. This is based on Daniel Svensson's
 534         # and Sham Chukoury's work in gitweb-xmms2.git.
 535         # It requires the 'highlight' program present in $PATH,
 536         # and therefore is disabled by default.
 537
 538         # To enable system wide have in $GITWEB_CONFIG
 539         # $feature{'highlight'}{'default'} = [1];
 540
 541         'highlight' => {
 542                 'sub' => sub { feature_bool('highlight', @_) },
 543                 'override' => 0,
 544                 'default' => [0]},
 545
 546         # Enable displaying of remote heads in the heads list
 547
 548         # To enable system wide have in $GITWEB_CONFIG
 549         # $feature{'remote_heads'}{'default'} = [1];
 550         # To have project specific config enable override in $GITWEB_CONFIG
 551         # $feature{'remote_heads'}{'override'} = 1;
 552         # and in project config gitweb.remoteheads = 0|1;
 553         'remote_heads' => {
 554                 'sub' => sub { feature_bool('remote_heads', @_) },
 555                 'override' => 0,
 556                 'default' => [0]},
 557
 558         # Enable showing branches under other refs in addition to heads
 559
 560         # To set system wide extra branch refs have in $GITWEB_CONFIG
 561         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 562         # To have project specific config enable override in $GITWEB_CONFIG
 563         # $feature{'extra-branch-refs'}{'override'} = 1;
 564         # and in project config gitweb.extrabranchrefs = dirs of choice
 565         # Every directory is separated with whitespace.
 566
 567         'extra-branch-refs' => {
 568                 'sub' => \&feature_extra_branch_refs,
 569                 'override' => 0,
 570                 'default' => []},
 571 );
 572
 573 sub gitweb_get_feature {
 574         my ($name) = @_;
 575         return unless exists $feature{$name};
 576         my ($sub, $override, @defaults) = (
 577                 $feature{$name}{'sub'},
 578                 $feature{$name}{'override'},
 579                 @{$feature{$name}{'default'}});
 580         # project specific override is possible only if we have project
 581         our $git_dir; # global variable, declared later
 582         if (!$override || !defined $git_dir) {
 583                 return @defaults;
 584         }
 585         if (!defined $sub) {
 586                 warn "feature $name is not overridable";
 587                 return @defaults;
 588         }
 589         return $sub->(@defaults);
 590 }
 591
 592 # A wrapper to check if a given feature is enabled.
 593 # With this, you can say
 594 #
 595 #   my $bool_feat = gitweb_check_feature('bool_feat');
 596 #   gitweb_check_feature('bool_feat') or somecode;
 597 #
 598 # instead of
 599 #
 600 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 601 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 602 #
 603 sub gitweb_check_feature {
 604         return (gitweb_get_feature(@_))[0];
 605 }
 606
 607
 608 sub feature_bool {
 609         my $key = shift;
 610         my ($val) = git_get_project_config($key, '--bool');
 611
 612         if (!defined $val) {
 613                 return ($_[0]);
 614         } elsif ($val eq 'true') {
 615                 return (1);
 616         } elsif ($val eq 'false') {
 617                 return (0);
 618         }
 619 }
 620
 621 sub feature_snapshot {
 622         my (@fmts) = @_;
 623
 624         my ($val) = git_get_project_config('snapshot');
 625
 626         if ($val) {
 627                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 628         }
 629
 630         return @fmts;
 631 }
 632
 633 sub feature_patches {
 634         my @val = (git_get_project_config('patches', '--int'));
 635
 636         if (@val) {
 637                 return @val;
 638         }
 639
 640         return ($_[0]);
 641 }
 642
 643 sub feature_avatar {
 644         my @val = (git_get_project_config('avatar'));
 645
 646         return @val ? @val : @_;
 647 }
 648
 649 sub feature_extra_branch_refs {
 650         my (@branch_refs) = @_;
 651         my $values = git_get_project_config('extrabranchrefs');
 652
 653         if ($values) {
 654                 $values = config_to_multi ($values);
 655                 @branch_refs = ();
 656                 foreach my $value (@{$values}) {
 657                         push @branch_refs, split /\s+/, $value;
 658                 }
 659         }
 660
 661         return @branch_refs;
 662 }
 663
 664 # checking HEAD file with -e is fragile if the repository was
 665 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 666 # and then pruned.
 667 sub check_head_link {
 668         my ($dir) = @_;
 669         my $headfile = "$dir/HEAD";
 670         return ((-e $headfile) ||
 671                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 672 }
 673
 674 sub check_export_ok {
 675         my ($dir) = @_;
 676         return (check_head_link($dir) &&
 677                 (!$export_ok || -e "$dir/$export_ok") &&
 678                 (!$export_auth_hook || $export_auth_hook->($dir)));
 679 }
 680
 681 # process alternate names for backward compatibility
 682 # filter out unsupported (unknown) snapshot formats
 683 sub filter_snapshot_fmts {
 684         my @fmts = @_;
 685
 686         @fmts = map {
 687                 exists $known_snapshot_format_aliases{$_} ?
 688                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 689         @fmts = grep {
 690                 exists $known_snapshot_formats{$_} &&
 691                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 692 }
 693
 694 sub filter_and_validate_refs {
 695         my @refs = @_;
 696         my %unique_refs = ();
 697
 698         foreach my $ref (@refs) {
 699                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 700                 # 'heads' are added implicitly in get_branch_refs().
 701                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 702         }
 703         return sort keys %unique_refs;
 704 }
 705
 706 # If it is set to code reference, it is code that it is to be run once per
 707 # request, allowing updating configurations that change with each request,
 708 # while running other code in config file only once.
 709 #
 710 # Otherwise, if it is false then gitweb would process config file only once;
 711 # if it is true then gitweb config would be run for each request.
 712 our $per_request_config = 1;
 713
 714 # read and parse gitweb config file given by its parameter.
 715 # returns true on success, false on recoverable error, allowing
 716 # to chain this subroutine, using first file that exists.
 717 # dies on errors during parsing config file, as it is unrecoverable.
 718 sub read_config_file {
 719         my $filename = shift;
 720         return unless defined $filename;
 721         # die if there are errors parsing config file
 722         if (-e $filename) {
 723                 do $filename;
 724                 die $@ if $@;
 725                 return 1;
 726         }
 727         return;
 728 }
 729
 730 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 731 sub evaluate_gitweb_config {
 732         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 733         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 734         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 735
 736         # Protect against duplications of file names, to not read config twice.
 737         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 738         # there possibility of duplication of filename there doesn't matter.
 739         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 740         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 741
 742         # Common system-wide settings for convenience.
 743         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 744         read_config_file($GITWEB_CONFIG_COMMON);
 745
 746         # Use first config file that exists.  This means use the per-instance
 747         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 748         read_config_file($GITWEB_CONFIG) and return;
 749         read_config_file($GITWEB_CONFIG_SYSTEM);
 750 }
 751
 752 # Get loadavg of system, to compare against $maxload.
 753 # Currently it requires '/proc/loadavg' present to get loadavg;
 754 # if it is not present it returns 0, which means no load checking.
 755 sub get_loadavg {
 756         if( -e '/proc/loadavg' ){
 757                 open my $fd, '<', '/proc/loadavg'
 758                         or return 0;
 759                 my @load = split(/\s+/, scalar <$fd>);
 760                 close $fd;
 761
 762                 # The first three columns measure CPU and IO utilization of the last one,
 763                 # five, and 10 minute periods.  The fourth column shows the number of
 764                 # currently running processes and the total number of processes in the m/n
 765                 # format.  The last column displays the last process ID used.
 766                 return $load[0] || 0;
 767         }
 768         # additional checks for load average should go here for things that don't export
 769         # /proc/loadavg
 770
 771         return 0;
 772 }
 773
 774 # version of the core git binary
 775 our $git_version;
 776 sub evaluate_git_version {
 777         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 778         $number_of_git_cmds++;
 779 }
 780
 781 sub check_loadavg {
 782         if (defined $maxload && get_loadavg() > $maxload) {
 783                 die_error(503, "The load average on the server is too high");
 784         }
 785 }
 786
 787 # ======================================================================
 788 # input validation and dispatch
 789
 790 # input parameters can be collected from a variety of sources (presently, CGI
 791 # and PATH_INFO), so we define an %input_params hash that collects them all
 792 # together during validation: this allows subsequent uses (e.g. href()) to be
 793 # agnostic of the parameter origin
 794
 795 our %input_params = ();
 796
 797 # input parameters are stored with the long parameter name as key. This will
 798 # also be used in the href subroutine to convert parameters to their CGI
 799 # equivalent, and since the href() usage is the most frequent one, we store
 800 # the name -> CGI key mapping here, instead of the reverse.
 801 #
 802 # XXX: Warning: If you touch this, check the search form for updating,
 803 # too.
 804
 805 our @cgi_param_mapping = (
 806         project => "p",
 807         action => "a",
 808         file_name => "f",
 809         file_parent => "fp",
 810         hash => "h",
 811         hash_parent => "hp",
 812         hash_base => "hb",
 813         hash_parent_base => "hpb",
 814         page => "pg",
 815         order => "o",
 816         searchtext => "s",
 817         searchtype => "st",
 818         snapshot_format => "sf",
 819         extra_options => "opt",
 820         search_use_regexp => "sr",
 821         ctag => "by_tag",
 822         diff_style => "ds",
 823         project_filter => "pf",
 824         # this must be last entry (for manipulation from JavaScript)
 825         javascript => "js"
 826 );
 827 our %cgi_param_mapping = @cgi_param_mapping;
 828
 829 # we will also need to know the possible actions, for validation
 830 our %actions = (
 831         "blame" => \&git_blame,
 832         "blame_incremental" => \&git_blame_incremental,
 833         "blame_data" => \&git_blame_data,
 834         "blobdiff" => \&git_blobdiff,
 835         "blobdiff_plain" => \&git_blobdiff_plain,
 836         "blob" => \&git_blob,
 837         "blob_plain" => \&git_blob_plain,
 838         "commitdiff" => \&git_commitdiff,
 839         "commitdiff_plain" => \&git_commitdiff_plain,
 840         "commit" => \&git_commit,
 841         "forks" => \&git_forks,
 842         "heads" => \&git_heads,
 843         "history" => \&git_history,
 844         "log" => \&git_log,
 845         "patch" => \&git_patch,
 846         "patches" => \&git_patches,
 847         "remotes" => \&git_remotes,
 848         "rss" => \&git_rss,
 849         "atom" => \&git_atom,
 850         "search" => \&git_search,
 851         "search_help" => \&git_search_help,
 852         "shortlog" => \&git_shortlog,
 853         "summary" => \&git_summary,
 854         "tag" => \&git_tag,
 855         "tags" => \&git_tags,
 856         "tree" => \&git_tree,
 857         "snapshot" => \&git_snapshot,
 858         "object" => \&git_object,
 859         # those below don't need $project
 860         "opml" => \&git_opml,
 861         "project_list" => \&git_project_list,
 862         "project_index" => \&git_project_index,
 863 );
 864
 865 # finally, we have the hash of allowed extra_options for the commands that
 866 # allow them
 867 our %allowed_options = (
 868         "--no-merges" => [ qw(rss atom log shortlog history) ],
 869 );
 870
 871 # fill %input_params with the CGI parameters. All values except for 'opt'
 872 # should be single values, but opt can be an array. We should probably
 873 # build an array of parameters that can be multi-valued, but since for the time
 874 # being it's only this one, we just single it out
 875 sub evaluate_query_params {
 876         our $cgi;
 877
 878         while (my ($name, $symbol) = each %cgi_param_mapping) {
 879                 if ($symbol eq 'opt') {
 880                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 881                 } else {
 882                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 883                 }
 884         }
 885 }
 886
 887 # now read PATH_INFO and update the parameter list for missing parameters
 888 sub evaluate_path_info {
 889         return if defined $input_params{'project'};
 890         return if !$path_info;
 891         $path_info =~ s,^/+,,;
 892         return if !$path_info;
 893
 894         # find which part of PATH_INFO is project
 895         my $project = $path_info;
 896         $project =~ s,/+$,,;
 897         while ($project && !check_head_link("$projectroot/$project")) {
 898                 $project =~ s,/*[^/]*$,,;
 899         }
 900         return unless $project;
 901         $input_params{'project'} = $project;
 902
 903         # do not change any parameters if an action is given using the query string
 904         return if $input_params{'action'};
 905         $path_info =~ s,^\Q$project\E/*,,;
 906
 907         # next, check if we have an action
 908         my $action = $path_info;
 909         $action =~ s,/.*$,,;
 910         if (exists $actions{$action}) {
 911                 $path_info =~ s,^$action/*,,;
 912                 $input_params{'action'} = $action;
 913         }
 914
 915         # list of actions that want hash_base instead of hash, but can have no
 916         # pathname (f) parameter
 917         my @wants_base = (
 918                 'tree',
 919                 'history',
 920         );
 921
 922         # we want to catch, among others
 923         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 924         my ($parentrefname, $parentpathname, $refname, $pathname) =
 925                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 926
 927         # first, analyze the 'current' part
 928         if (defined $pathname) {
 929                 # we got "branch:filename" or "branch:dir/"
 930                 # we could use git_get_type(branch:pathname), but:
 931                 # - it needs $git_dir
 932                 # - it does a git() call
 933                 # - the convention of terminating directories with a slash
 934                 #   makes it superfluous
 935                 # - embedding the action in the PATH_INFO would make it even
 936                 #   more superfluous
 937                 $pathname =~ s,^/+,,;
 938                 if (!$pathname || substr($pathname, -1) eq "/") {
 939                         $input_params{'action'} ||= "tree";
 940                         $pathname =~ s,/$,,;
 941                 } else {
 942                         # the default action depends on whether we had parent info
 943                         # or not
 944                         if ($parentrefname) {
 945                                 $input_params{'action'} ||= "blobdiff_plain";
 946                         } else {
 947                                 $input_params{'action'} ||= "blob_plain";
 948                         }
 949                 }
 950                 $input_params{'hash_base'} ||= $refname;
 951                 $input_params{'file_name'} ||= $pathname;
 952         } elsif (defined $refname) {
 953                 # we got "branch". In this case we have to choose if we have to
 954                 # set hash or hash_base.
 955                 #
 956                 # Most of the actions without a pathname only want hash to be
 957                 # set, except for the ones specified in @wants_base that want
 958                 # hash_base instead. It should also be noted that hand-crafted
 959                 # links having 'history' as an action and no pathname or hash
 960                 # set will fail, but that happens regardless of PATH_INFO.
 961                 if (defined $parentrefname) {
 962                         # if there is parent let the default be 'shortlog' action
 963                         # (for http://git.example.com/repo.git/A..B links); if there
 964                         # is no parent, dispatch will detect type of object and set
 965                         # action appropriately if required (if action is not set)
 966                         $input_params{'action'} ||= "shortlog";
 967                 }
 968                 if ($input_params{'action'} &&
 969                     grep { $_ eq $input_params{'action'} } @wants_base) {
 970                         $input_params{'hash_base'} ||= $refname;
 971                 } else {
 972                         $input_params{'hash'} ||= $refname;
 973                 }
 974         }
 975
 976         # next, handle the 'parent' part, if present
 977         if (defined $parentrefname) {
 978                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 979                 # someproject/blobdiff/oldrev..newrev:/filename
 980                 if ($parentpathname) {
 981                         $parentpathname =~ s,^/+,,;
 982                         $parentpathname =~ s,/$,,;
 983                         $input_params{'file_parent'} ||= $parentpathname;
 984                 } else {
 985                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 986                 }
 987                 # we assume that hash_parent_base is wanted if a path was specified,
 988                 # or if the action wants hash_base instead of hash
 989                 if (defined $input_params{'file_parent'} ||
 990                         grep { $_ eq $input_params{'action'} } @wants_base) {
 991                         $input_params{'hash_parent_base'} ||= $parentrefname;
 992                 } else {
 993                         $input_params{'hash_parent'} ||= $parentrefname;
 994                 }
 995         }
 996
 997         # for the snapshot action, we allow URLs in the form
 998         # $project/snapshot/$hash.ext
 999         # where .ext determines the snapshot and gets removed from the
1000         # passed $refname to provide the $hash.
1001         #
1002         # To be able to tell that $refname includes the format extension, we
1003         # require the following two conditions to be satisfied:
1004         # - the hash input parameter MUST have been set from the $refname part
1005         #   of the URL (i.e. they must be equal)
1006         # - the snapshot format MUST NOT have been defined already (e.g. from
1007         #   CGI parameter sf)
1008         # It's also useless to try any matching unless $refname has a dot,
1009         # so we check for that too
1010         if (defined $input_params{'action'} &&
1011                 $input_params{'action'} eq 'snapshot' &&
1012                 defined $refname && index($refname, '.') != -1 &&
1013                 $refname eq $input_params{'hash'} &&
1014                 !defined $input_params{'snapshot_format'}) {
1015                 # We loop over the known snapshot formats, checking for
1016                 # extensions. Allowed extensions are both the defined suffix
1017                 # (which includes the initial dot already) and the snapshot
1018                 # format key itself, with a prepended dot
1019                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1020                         my $hash = $refname;
1021                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1022                                 next;
1023                         }
1024                         my $sfx = $1;
1025                         # a valid suffix was found, so set the snapshot format
1026                         # and reset the hash parameter
1027                         $input_params{'snapshot_format'} = $fmt;
1028                         $input_params{'hash'} = $hash;
1029                         # we also set the format suffix to the one requested
1030                         # in the URL: this way a request for e.g. .tgz returns
1031                         # a .tgz instead of a .tar.gz
1032                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1033                         last;
1034                 }
1035         }
1036 }
1037
1038 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1039      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1040      $searchtext, $search_regexp, $project_filter);
1041 sub evaluate_and_validate_params {
1042         our $action = $input_params{'action'};
1043         if (defined $action) {
1044                 if (!is_valid_action($action)) {
1045                         die_error(400, "Invalid action parameter");
1046                 }
1047         }
1048
1049         # parameters which are pathnames
1050         our $project = $input_params{'project'};
1051         if (defined $project) {
1052                 if (!is_valid_project($project)) {
1053                         undef $project;
1054                         die_error(404, "No such project");
1055                 }
1056         }
1057
1058         our $project_filter = $input_params{'project_filter'};
1059         if (defined $project_filter) {
1060                 if (!is_valid_pathname($project_filter)) {
1061                         die_error(404, "Invalid project_filter parameter");
1062                 }
1063         }
1064
1065         our $file_name = $input_params{'file_name'};
1066         if (defined $file_name) {
1067                 if (!is_valid_pathname($file_name)) {
1068                         die_error(400, "Invalid file parameter");
1069                 }
1070         }
1071
1072         our $file_parent = $input_params{'file_parent'};
1073         if (defined $file_parent) {
1074                 if (!is_valid_pathname($file_parent)) {
1075                         die_error(400, "Invalid file parent parameter");
1076                 }
1077         }
1078
1079         # parameters which are refnames
1080         our $hash = $input_params{'hash'};
1081         if (defined $hash) {
1082                 if (!is_valid_refname($hash)) {
1083                         die_error(400, "Invalid hash parameter");
1084                 }
1085         }
1086
1087         our $hash_parent = $input_params{'hash_parent'};
1088         if (defined $hash_parent) {
1089                 if (!is_valid_refname($hash_parent)) {
1090                         die_error(400, "Invalid hash parent parameter");
1091                 }
1092         }
1093
1094         our $hash_base = $input_params{'hash_base'};
1095         if (defined $hash_base) {
1096                 if (!is_valid_refname($hash_base)) {
1097                         die_error(400, "Invalid hash base parameter");
1098                 }
1099         }
1100
1101         our @extra_options = @{$input_params{'extra_options'}};
1102         # @extra_options is always defined, since it can only be (currently) set from
1103         # CGI, and $cgi->param() returns the empty array in array context if the param
1104         # is not set
1105         foreach my $opt (@extra_options) {
1106                 if (not exists $allowed_options{$opt}) {
1107                         die_error(400, "Invalid option parameter");
1108                 }
1109                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1110                         die_error(400, "Invalid option parameter for this action");
1111                 }
1112         }
1113
1114         our $hash_parent_base = $input_params{'hash_parent_base'};
1115         if (defined $hash_parent_base) {
1116                 if (!is_valid_refname($hash_parent_base)) {
1117                         die_error(400, "Invalid hash parent base parameter");
1118                 }
1119         }
1120
1121         # other parameters
1122         our $page = $input_params{'page'};
1123         if (defined $page) {
1124                 if ($page =~ m/[^0-9]/) {
1125                         die_error(400, "Invalid page parameter");
1126                 }
1127         }
1128
1129         our $searchtype = $input_params{'searchtype'};
1130         if (defined $searchtype) {
1131                 if ($searchtype =~ m/[^a-z]/) {
1132                         die_error(400, "Invalid searchtype parameter");
1133                 }
1134         }
1135
1136         our $search_use_regexp = $input_params{'search_use_regexp'};
1137
1138         our $searchtext = $input_params{'searchtext'};
1139         our $search_regexp = undef;
1140         if (defined $searchtext) {
1141                 if (length($searchtext) < 2) {
1142                         die_error(403, "At least two characters are required for search parameter");
1143                 }
1144                 if ($search_use_regexp) {
1145                         $search_regexp = $searchtext;
1146                         if (!eval { qr/$search_regexp/; 1; }) {
1147                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1148                                 die_error(400, "Invalid search regexp '$search_regexp'",
1149                                           esc_html($error));
1150                         }
1151                 } else {
1152                         $search_regexp = quotemeta $searchtext;
1153                 }
1154         }
1155 }
1156
1157 # path to the current git repository
1158 our $git_dir;
1159 sub evaluate_git_dir {
1160         our $git_dir = "$projectroot/$project" if $project;
1161 }
1162
1163 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1164 sub configure_gitweb_features {
1165         # list of supported snapshot formats
1166         our @snapshot_fmts = gitweb_get_feature('snapshot');
1167         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1168
1169         # check that the avatar feature is set to a known provider name,
1170         # and for each provider check if the dependencies are satisfied.
1171         # if the provider name is invalid or the dependencies are not met,
1172         # reset $git_avatar to the empty string.
1173         our ($git_avatar) = gitweb_get_feature('avatar');
1174         if ($git_avatar eq 'gravatar') {
1175                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1176         } elsif ($git_avatar eq 'picon') {
1177                 # no dependencies
1178         } else {
1179                 $git_avatar = '';
1180         }
1181
1182         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1183         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1184 }
1185
1186 sub get_branch_refs {
1187         return ('heads', @extra_branch_refs);
1188 }
1189
1190 # custom error handler: 'die <message>' is Internal Server Error
1191 sub handle_errors_html {
1192         my $msg = shift; # it is already HTML escaped
1193
1194         # to avoid infinite loop where error occurs in die_error,
1195         # change handler to default handler, disabling handle_errors_html
1196         set_message("Error occurred when inside die_error:\n$msg");
1197
1198         # you cannot jump out of die_error when called as error handler;
1199         # the subroutine set via CGI::Carp::set_message is called _after_
1200         # HTTP headers are already written, so it cannot write them itself
1201         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1202 }
1203 set_message(\&handle_errors_html);
1204
1205 # dispatch
1206 sub dispatch {
1207         if (!defined $action) {
1208                 if (defined $hash) {
1209                         $action = git_get_type($hash);
1210                         $action or die_error(404, "Object does not exist");
1211                 } elsif (defined $hash_base && defined $file_name) {
1212                         $action = git_get_type("$hash_base:$file_name");
1213                         $action or die_error(404, "File or directory does not exist");
1214                 } elsif (defined $project) {
1215                         $action = 'summary';
1216                 } else {
1217                         $action = 'project_list';
1218                 }
1219         }
1220         if (!defined($actions{$action})) {
1221                 die_error(400, "Unknown action");
1222         }
1223         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1224             !$project) {
1225                 die_error(400, "Project needed");
1226         }
1227         $actions{$action}->();
1228 }
1229
1230 sub reset_timer {
1231         our $t0 = [ gettimeofday() ]
1232                 if defined $t0;
1233         our $number_of_git_cmds = 0;
1234 }
1235
1236 our $first_request = 1;
1237 sub run_request {
1238         reset_timer();
1239
1240         evaluate_uri();
1241         if ($first_request) {
1242                 evaluate_gitweb_config();
1243                 evaluate_git_version();
1244         }
1245         if ($per_request_config) {
1246                 if (ref($per_request_config) eq 'CODE') {
1247                         $per_request_config->();
1248                 } elsif (!$first_request) {
1249                         evaluate_gitweb_config();
1250                 }
1251         }
1252         check_loadavg();
1253
1254         # $projectroot and $projects_list might be set in gitweb config file
1255         $projects_list ||= $projectroot;
1256
1257         evaluate_query_params();
1258         evaluate_path_info();
1259         evaluate_and_validate_params();
1260         evaluate_git_dir();
1261
1262         configure_gitweb_features();
1263
1264         dispatch();
1265 }
1266
1267 our $is_last_request = sub { 1 };
1268 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1269 our $CGI = 'CGI';
1270 our $cgi;
1271 sub configure_as_fcgi {
1272         require CGI::Fast;
1273         our $CGI = 'CGI::Fast';
1274
1275         my $request_number = 0;
1276         # let each child service 100 requests
1277         our $is_last_request = sub { ++$request_number > 100 };
1278 }
1279 sub evaluate_argv {
1280         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1281         configure_as_fcgi()
1282                 if $script_name =~ /\.fcgi$/;
1283
1284         return unless (@ARGV);
1285
1286         require Getopt::Long;
1287         Getopt::Long::GetOptions(
1288                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1289                 'nproc|n=i' => sub {
1290                         my ($arg, $val) = @_;
1291                         return unless eval { require FCGI::ProcManager; 1; };
1292                         my $proc_manager = FCGI::ProcManager->new({
1293                                 n_processes => $val,
1294                         });
1295                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1296                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1297                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1298                 },
1299         );
1300 }
1301
1302 sub run {
1303         evaluate_argv();
1304
1305         $first_request = 1;
1306         $pre_listen_hook->()
1307                 if $pre_listen_hook;
1308
1309  REQUEST:
1310         while ($cgi = $CGI->new()) {
1311                 $pre_dispatch_hook->()
1312                         if $pre_dispatch_hook;
1313
1314                 run_request();
1315
1316                 $post_dispatch_hook->()
1317                         if $post_dispatch_hook;
1318                 $first_request = 0;
1319
1320                 last REQUEST if ($is_last_request->());
1321         }
1322
1323  DONE_GITWEB:
1324         1;
1325 }
1326
1327 run();
1328
1329 if (defined caller) {
1330         # wrapped in a subroutine processing requests,
1331         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1332         return;
1333 } else {
1334         # pure CGI script, serving single request
1335         exit;
1336 }
1337
1338 ## ======================================================================
1339 ## action links
1340
1341 # possible values of extra options
1342 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1343 # -replay => 1      - start from a current view (replay with modifications)
1344 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1345 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1346 sub href {
1347         my %params = @_;
1348         # default is to use -absolute url() i.e. $my_uri
1349         my $href = $params{-full} ? $my_url : $my_uri;
1350
1351         # implicit -replay, must be first of implicit params
1352         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1353
1354         $params{'project'} = $project unless exists $params{'project'};
1355
1356         if ($params{-replay}) {
1357                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1358                         if (!exists $params{$name}) {
1359                                 $params{$name} = $input_params{$name};
1360                         }
1361                 }
1362         }
1363
1364         my $use_pathinfo = gitweb_check_feature('pathinfo');
1365         if (defined $params{'project'} &&
1366             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1367                 # try to put as many parameters as possible in PATH_INFO:
1368                 #   - project name
1369                 #   - action
1370                 #   - hash_parent or hash_parent_base:/file_parent
1371                 #   - hash or hash_base:/filename
1372                 #   - the snapshot_format as an appropriate suffix
1373
1374                 # When the script is the root DirectoryIndex for the domain,
1375                 # $href here would be something like http://gitweb.example.com/
1376                 # Thus, we strip any trailing / from $href, to spare us double
1377                 # slashes in the final URL
1378                 $href =~ s,/$,,;
1379
1380                 # Then add the project name, if present
1381                 $href .= "/".esc_path_info($params{'project'});
1382                 delete $params{'project'};
1383
1384                 # since we destructively absorb parameters, we keep this
1385                 # boolean that remembers if we're handling a snapshot
1386                 my $is_snapshot = $params{'action'} eq 'snapshot';
1387
1388                 # Summary just uses the project path URL, any other action is
1389                 # added to the URL
1390                 if (defined $params{'action'}) {
1391                         $href .= "/".esc_path_info($params{'action'})
1392                                 unless $params{'action'} eq 'summary';
1393                         delete $params{'action'};
1394                 }
1395
1396                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1397                 # stripping nonexistent or useless pieces
1398                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1399                         || $params{'hash_parent'} || $params{'hash'});
1400                 if (defined $params{'hash_base'}) {
1401                         if (defined $params{'hash_parent_base'}) {
1402                                 $href .= esc_path_info($params{'hash_parent_base'});
1403                                 # skip the file_parent if it's the same as the file_name
1404                                 if (defined $params{'file_parent'}) {
1405                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1406                                                 delete $params{'file_parent'};
1407                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1408                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1409                                                 delete $params{'file_parent'};
1410                                         }
1411                                 }
1412                                 $href .= "..";
1413                                 delete $params{'hash_parent'};
1414                                 delete $params{'hash_parent_base'};
1415                         } elsif (defined $params{'hash_parent'}) {
1416                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1417                                 delete $params{'hash_parent'};
1418                         }
1419
1420                         $href .= esc_path_info($params{'hash_base'});
1421                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1422                                 $href .= ":/".esc_path_info($params{'file_name'});
1423                                 delete $params{'file_name'};
1424                         }
1425                         delete $params{'hash'};
1426                         delete $params{'hash_base'};
1427                 } elsif (defined $params{'hash'}) {
1428                         $href .= esc_path_info($params{'hash'});
1429                         delete $params{'hash'};
1430                 }
1431
1432                 # If the action was a snapshot, we can absorb the
1433                 # snapshot_format parameter too
1434                 if ($is_snapshot) {
1435                         my $fmt = $params{'snapshot_format'};
1436                         # snapshot_format should always be defined when href()
1437                         # is called, but just in case some code forgets, we
1438                         # fall back to the default
1439                         $fmt ||= $snapshot_fmts[0];
1440                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1441                         delete $params{'snapshot_format'};
1442                 }
1443         }
1444
1445         # now encode the parameters explicitly
1446         my @result = ();
1447         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1448                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1449                 if (defined $params{$name}) {
1450                         if (ref($params{$name}) eq "ARRAY") {
1451                                 foreach my $par (@{$params{$name}}) {
1452                                         push @result, $symbol . "=" . esc_param($par);
1453                                 }
1454                         } else {
1455                                 push @result, $symbol . "=" . esc_param($params{$name});
1456                         }
1457                 }
1458         }
1459         $href .= "?" . join(';', @result) if scalar @result;
1460
1461         # final transformation: trailing spaces must be escaped (URI-encoded)
1462         $href =~ s/(\s+)$/CGI::escape($1)/e;
1463
1464         if ($params{-anchor}) {
1465                 $href .= "#".esc_param($params{-anchor});
1466         }
1467
1468         return $href;
1469 }
1470
1471
1472 ## ======================================================================
1473 ## validation, quoting/unquoting and escaping
1474
1475 sub is_valid_action {
1476         my $input = shift;
1477         return undef unless exists $actions{$input};
1478         return 1;
1479 }
1480
1481 sub is_valid_project {
1482         my $input = shift;
1483
1484         return unless defined $input;
1485         if (!is_valid_pathname($input) ||
1486                 !(-d "$projectroot/$input") ||
1487                 !check_export_ok("$projectroot/$input") ||
1488                 ($strict_export && !project_in_list($input))) {
1489                 return undef;
1490         } else {
1491                 return 1;
1492         }
1493 }
1494
1495 sub is_valid_pathname {
1496         my $input = shift;
1497
1498         return undef unless defined $input;
1499         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1500         # at the beginning, at the end, and between slashes.
1501         # also this catches doubled slashes
1502         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1503                 return undef;
1504         }
1505         # no null characters
1506         if ($input =~ m!\0!) {
1507                 return undef;
1508         }
1509         return 1;
1510 }
1511
1512 sub is_valid_ref_format {
1513         my $input = shift;
1514
1515         return undef unless defined $input;
1516         # restrictions on ref name according to git-check-ref-format
1517         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1518                 return undef;
1519         }
1520         return 1;
1521 }
1522
1523 sub is_valid_refname {
1524         my $input = shift;
1525
1526         return undef unless defined $input;
1527         # textual hashes are O.K.
1528         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1529                 return 1;
1530         }
1531         # it must be correct pathname
1532         is_valid_pathname($input) or return undef;
1533         # check git-check-ref-format restrictions
1534         is_valid_ref_format($input) or return undef;
1535         return 1;
1536 }
1537
1538 # decode sequences of octets in utf8 into Perl's internal form,
1539 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1540 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1541 sub to_utf8 {
1542         my $str = shift;
1543         return undef unless defined $str;
1544
1545         if (utf8::is_utf8($str) || utf8::decode($str)) {
1546                 return $str;
1547         } else {
1548                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1549         }
1550 }
1551
1552 # quote unsafe chars, but keep the slash, even when it's not
1553 # correct, but quoted slashes look too horrible in bookmarks
1554 sub esc_param {
1555         my $str = shift;
1556         return undef unless defined $str;
1557         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1558         $str =~ s/ /\+/g;
1559         return $str;
1560 }
1561
1562 # the quoting rules for path_info fragment are slightly different
1563 sub esc_path_info {
1564         my $str = shift;
1565         return undef unless defined $str;
1566
1567         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1568         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1569
1570         return $str;
1571 }
1572
1573 # quote unsafe chars in whole URL, so some characters cannot be quoted
1574 sub esc_url {
1575         my $str = shift;
1576         return undef unless defined $str;
1577         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1578         $str =~ s/ /\+/g;
1579         return $str;
1580 }
1581
1582 # quote unsafe characters in HTML attributes
1583 sub esc_attr {
1584
1585         # for XHTML conformance escaping '"' to '&quot;' is not enough
1586         return esc_html(@_);
1587 }
1588
1589 # replace invalid utf8 character with SUBSTITUTION sequence
1590 sub esc_html {
1591         my $str = shift;
1592         my %opts = @_;
1593
1594         return undef unless defined $str;
1595
1596         $str = to_utf8($str);
1597         $str = $cgi->escapeHTML($str);
1598         if ($opts{'-nbsp'}) {
1599                 $str =~ s/ /&nbsp;/g;
1600         }
1601         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1602         return $str;
1603 }
1604
1605 # quote control characters and escape filename to HTML
1606 sub esc_path {
1607         my $str = shift;
1608         my %opts = @_;
1609
1610         return undef unless defined $str;
1611
1612         $str = to_utf8($str);
1613         $str = $cgi->escapeHTML($str);
1614         if ($opts{'-nbsp'}) {
1615                 $str =~ s/ /&nbsp;/g;
1616         }
1617         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1618         return $str;
1619 }
1620
1621 # Sanitize for use in XHTML + application/xml+xhtml (valid XML 1.0)
1622 sub sanitize {
1623         my $str = shift;
1624
1625         return undef unless defined $str;
1626
1627         $str = to_utf8($str);
1628         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1629         return $str;
1630 }
1631
1632 # Make control characters "printable", using character escape codes (CEC)
1633 sub quot_cec {
1634         my $cntrl = shift;
1635         my %opts = @_;
1636         my %es = ( # character escape codes, aka escape sequences
1637                 "\t" => '\t',   # tab            (HT)
1638                 "\n" => '\n',   # line feed      (LF)
1639                 "\r" => '\r',   # carrige return (CR)
1640                 "\f" => '\f',   # form feed      (FF)
1641                 "\b" => '\b',   # backspace      (BS)
1642                 "\a" => '\a',   # alarm (bell)   (BEL)
1643                 "\e" => '\e',   # escape         (ESC)
1644                 "\013" => '\v', # vertical tab   (VT)
1645                 "\000" => '\0', # nul character  (NUL)
1646         );
1647         my $chr = ( (exists $es{$cntrl})
1648                     ? $es{$cntrl}
1649                     : sprintf('\%2x', ord($cntrl)) );
1650         if ($opts{-nohtml}) {
1651                 return $chr;
1652         } else {
1653                 return "<span class=\"cntrl\">$chr</span>";
1654         }
1655 }
1656
1657 # Alternatively use unicode control pictures codepoints,
1658 # Unicode "printable representation" (PR)
1659 sub quot_upr {
1660         my $cntrl = shift;
1661         my %opts = @_;
1662
1663         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1664         if ($opts{-nohtml}) {
1665                 return $chr;
1666         } else {
1667                 return "<span class=\"cntrl\">$chr</span>";
1668         }
1669 }
1670
1671 # git may return quoted and escaped filenames
1672 sub unquote {
1673         my $str = shift;
1674
1675         sub unq {
1676                 my $seq = shift;
1677                 my %es = ( # character escape codes, aka escape sequences
1678                         't' => "\t",   # tab            (HT, TAB)
1679                         'n' => "\n",   # newline        (NL)
1680                         'r' => "\r",   # return         (CR)
1681                         'f' => "\f",   # form feed      (FF)
1682                         'b' => "\b",   # backspace      (BS)
1683                         'a' => "\a",   # alarm (bell)   (BEL)
1684                         'e' => "\e",   # escape         (ESC)
1685                         'v' => "\013", # vertical tab   (VT)
1686                 );
1687
1688                 if ($seq =~ m/^[0-7]{1,3}$/) {
1689                         # octal char sequence
1690                         return chr(oct($seq));
1691                 } elsif (exists $es{$seq}) {
1692                         # C escape sequence, aka character escape code
1693                         return $es{$seq};
1694                 }
1695                 # quoted ordinary character
1696                 return $seq;
1697         }
1698
1699         if ($str =~ m/^"(.*)"$/) {
1700                 # needs unquoting
1701                 $str = $1;
1702                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1703         }
1704         return $str;
1705 }
1706
1707 # escape tabs (convert tabs to spaces)
1708 sub untabify {
1709         my $line = shift;
1710
1711         while ((my $pos = index($line, "\t")) != -1) {
1712                 if (my $count = (8 - ($pos % 8))) {
1713                         my $spaces = ' ' x $count;
1714                         $line =~ s/\t/$spaces/;
1715                 }
1716         }
1717
1718         return $line;
1719 }
1720
1721 sub project_in_list {
1722         my $project = shift;
1723         my @list = git_get_projects_list();
1724         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1725 }
1726
1727 ## ----------------------------------------------------------------------
1728 ## HTML aware string manipulation
1729
1730 # Try to chop given string on a word boundary between position
1731 # $len and $len+$add_len. If there is no word boundary there,
1732 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1733 # (marking chopped part) would be longer than given string.
1734 sub chop_str {
1735         my $str = shift;
1736         my $len = shift;
1737         my $add_len = shift || 10;
1738         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1739
1740         # Make sure perl knows it is utf8 encoded so we don't
1741         # cut in the middle of a utf8 multibyte char.
1742         $str = to_utf8($str);
1743
1744         # allow only $len chars, but don't cut a word if it would fit in $add_len
1745         # if it doesn't fit, cut it if it's still longer than the dots we would add
1746         # remove chopped character entities entirely
1747
1748         # when chopping in the middle, distribute $len into left and right part
1749         # return early if chopping wouldn't make string shorter
1750         if ($where eq 'center') {
1751                 return $str if ($len + 5 >= length($str)); # filler is length 5
1752                 $len = int($len/2);
1753         } else {
1754                 return $str if ($len + 4 >= length($str)); # filler is length 4
1755         }
1756
1757         # regexps: ending and beginning with word part up to $add_len
1758         my $endre = qr/.{$len}\w{0,$add_len}/;
1759         my $begre = qr/\w{0,$add_len}.{$len}/;
1760
1761         if ($where eq 'left') {
1762                 $str =~ m/^(.*?)($begre)$/;
1763                 my ($lead, $body) = ($1, $2);
1764                 if (length($lead) > 4) {
1765                         $lead = " ...";
1766                 }
1767                 return "$lead$body";
1768
1769         } elsif ($where eq 'center') {
1770                 $str =~ m/^($endre)(.*)$/;
1771                 my ($left, $str)  = ($1, $2);
1772                 $str =~ m/^(.*?)($begre)$/;
1773                 my ($mid, $right) = ($1, $2);
1774                 if (length($mid) > 5) {
1775                         $mid = " ... ";
1776                 }
1777                 return "$left$mid$right";
1778
1779         } else {
1780                 $str =~ m/^($endre)(.*)$/;
1781                 my $body = $1;
1782                 my $tail = $2;
1783                 if (length($tail) > 4) {
1784                         $tail = "... ";
1785                 }
1786                 return "$body$tail";
1787         }
1788 }
1789
1790 # takes the same arguments as chop_str, but also wraps a <span> around the
1791 # result with a title attribute if it does get chopped. Additionally, the
1792 # string is HTML-escaped.
1793 sub chop_and_escape_str {
1794         my ($str) = @_;
1795
1796         my $chopped = chop_str(@_);
1797         $str = to_utf8($str);
1798         if ($chopped eq $str) {
1799                 return esc_html($chopped);
1800         } else {
1801                 $str =~ s/[[:cntrl:]]/?/g;
1802                 return $cgi->span({-title=>$str}, esc_html($chopped));
1803         }
1804 }
1805
1806 # Highlight selected fragments of string, using given CSS class,
1807 # and escape HTML.  It is assumed that fragments do not overlap.
1808 # Regions are passed as list of pairs (array references).
1809 #
1810 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1811 # '<span class="mark">foo</span>bar'
1812 sub esc_html_hl_regions {
1813         my ($str, $css_class, @sel) = @_;
1814         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1815         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1816         return esc_html($str, %opts) unless @sel;
1817
1818         my $out = '';
1819         my $pos = 0;
1820
1821         for my $s (@sel) {
1822                 my ($begin, $end) = @$s;
1823
1824                 # Don't create empty <span> elements.
1825                 next if $end <= $begin;
1826
1827                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1828                                        %opts);
1829
1830                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1831                         if ($begin - $pos > 0);
1832                 $out .= $cgi->span({-class => $css_class}, $escaped);
1833
1834                 $pos = $end;
1835         }
1836         $out .= esc_html(substr($str, $pos), %opts)
1837                 if ($pos < length($str));
1838
1839         return $out;
1840 }
1841
1842 # return positions of beginning and end of each match
1843 sub matchpos_list {
1844         my ($str, $regexp) = @_;
1845         return unless (defined $str && defined $regexp);
1846
1847         my @matches;
1848         while ($str =~ /$regexp/g) {
1849                 push @matches, [$-[0], $+[0]];
1850         }
1851         return @matches;
1852 }
1853
1854 # highlight match (if any), and escape HTML
1855 sub esc_html_match_hl {
1856         my ($str, $regexp) = @_;
1857         return esc_html($str) unless defined $regexp;
1858
1859         my @matches = matchpos_list($str, $regexp);
1860         return esc_html($str) unless @matches;
1861
1862         return esc_html_hl_regions($str, 'match', @matches);
1863 }
1864
1865
1866 # highlight match (if any) of shortened string, and escape HTML
1867 sub esc_html_match_hl_chopped {
1868         my ($str, $chopped, $regexp) = @_;
1869         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1870
1871         my @matches = matchpos_list($str, $regexp);
1872         return esc_html($chopped) unless @matches;
1873
1874         # filter matches so that we mark chopped string
1875         my $tail = "... "; # see chop_str
1876         unless ($chopped =~ s/\Q$tail\E$//) {
1877                 $tail = '';
1878         }
1879         my $chop_len = length($chopped);
1880         my $tail_len = length($tail);
1881         my @filtered;
1882
1883         for my $m (@matches) {
1884                 if ($m->[0] > $chop_len) {
1885                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1886                         last;
1887                 } elsif ($m->[1] > $chop_len) {
1888                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1889                         last;
1890                 }
1891                 push @filtered, $m;
1892         }
1893
1894         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1895 }
1896
1897 ## ----------------------------------------------------------------------
1898 ## functions returning short strings
1899
1900 # CSS class for given age value (in seconds)
1901 sub age_class {
1902         my $age = shift;
1903
1904         if (!defined $age) {
1905                 return "noage";
1906         } elsif ($age < 60*60*2) {
1907                 return "age0";
1908         } elsif ($age < 60*60*24*2) {
1909                 return "age1";
1910         } else {
1911                 return "age2";
1912         }
1913 }
1914
1915 # convert age in seconds to "nn units ago" string
1916 sub age_string {
1917         my $age = shift;
1918         my $age_str;
1919
1920         if ($age > 60*60*24*365*2) {
1921                 $age_str = (int $age/60/60/24/365);
1922                 $age_str .= " years ago";
1923         } elsif ($age > 60*60*24*(365/12)*2) {
1924                 $age_str = int $age/60/60/24/(365/12);
1925                 $age_str .= " months ago";
1926         } elsif ($age > 60*60*24*7*2) {
1927                 $age_str = int $age/60/60/24/7;
1928                 $age_str .= " weeks ago";
1929         } elsif ($age > 60*60*24*2) {
1930                 $age_str = int $age/60/60/24;
1931                 $age_str .= " days ago";
1932         } elsif ($age > 60*60*2) {
1933                 $age_str = int $age/60/60;
1934                 $age_str .= " hours ago";
1935         } elsif ($age > 60*2) {
1936                 $age_str = int $age/60;
1937                 $age_str .= " min ago";
1938         } elsif ($age > 2) {
1939                 $age_str = int $age;
1940                 $age_str .= " sec ago";
1941         } else {
1942                 $age_str .= " right now";
1943         }
1944         return $age_str;
1945 }
1946
1947 use constant {
1948         S_IFINVALID => 0030000,
1949         S_IFGITLINK => 0160000,
1950 };
1951
1952 # submodule/subproject, a commit object reference
1953 sub S_ISGITLINK {
1954         my $mode = shift;
1955
1956         return (($mode & S_IFMT) == S_IFGITLINK)
1957 }
1958
1959 # convert file mode in octal to symbolic file mode string
1960 sub mode_str {
1961         my $mode = oct shift;
1962
1963         if (S_ISGITLINK($mode)) {
1964                 return 'm---------';
1965         } elsif (S_ISDIR($mode & S_IFMT)) {
1966                 return 'drwxr-xr-x';
1967         } elsif (S_ISLNK($mode)) {
1968                 return 'lrwxrwxrwx';
1969         } elsif (S_ISREG($mode)) {
1970                 # git cares only about the executable bit
1971                 if ($mode & S_IXUSR) {
1972                         return '-rwxr-xr-x';
1973                 } else {
1974                         return '-rw-r--r--';
1975                 };
1976         } else {
1977                 return '----------';
1978         }
1979 }
1980
1981 # convert file mode in octal to file type string
1982 sub file_type {
1983         my $mode = shift;
1984
1985         if ($mode !~ m/^[0-7]+$/) {
1986                 return $mode;
1987         } else {
1988                 $mode = oct $mode;
1989         }
1990
1991         if (S_ISGITLINK($mode)) {
1992                 return "submodule";
1993         } elsif (S_ISDIR($mode & S_IFMT)) {
1994                 return "directory";
1995         } elsif (S_ISLNK($mode)) {
1996                 return "symlink";
1997         } elsif (S_ISREG($mode)) {
1998                 return "file";
1999         } else {
2000                 return "unknown";
2001         }
2002 }
2003
2004 # convert file mode in octal to file type description string
2005 sub file_type_long {
2006         my $mode = shift;
2007
2008         if ($mode !~ m/^[0-7]+$/) {
2009                 return $mode;
2010         } else {
2011                 $mode = oct $mode;
2012         }
2013
2014         if (S_ISGITLINK($mode)) {
2015                 return "submodule";
2016         } elsif (S_ISDIR($mode & S_IFMT)) {
2017                 return "directory";
2018         } elsif (S_ISLNK($mode)) {
2019                 return "symlink";
2020         } elsif (S_ISREG($mode)) {
2021                 if ($mode & S_IXUSR) {
2022                         return "executable";
2023                 } else {
2024                         return "file";
2025                 };
2026         } else {
2027                 return "unknown";
2028         }
2029 }
2030
2031
2032 ## ----------------------------------------------------------------------
2033 ## functions returning short HTML fragments, or transforming HTML fragments
2034 ## which don't belong to other sections
2035
2036 # format line of commit message.
2037 sub format_log_line_html {
2038         my $line = shift;
2039
2040         $line = esc_html($line, -nbsp=>1);
2041         $line =~ s{
2042         \b
2043         (
2044             # The output of "git describe", e.g. v2.10.0-297-gf6727b0
2045             # or hadoop-20160921-113441-20-g094fb7d
2046             (?<!-) # see strbuf_check_tag_ref(). Tags can't start with -
2047             [A-Za-z0-9.-]+
2048             (?!\.) # refs can't end with ".", see check_refname_format()
2049             -g[0-9a-fA-F]{7,40}
2050             |
2051             # Just a normal looking Git SHA1
2052             [0-9a-fA-F]{7,40}
2053         )
2054         \b
2055     }{
2056                 $cgi->a({-href => href(action=>"object", hash=>$1),
2057                                         -class => "text"}, $1);
2058         }egx;
2059
2060         return $line;
2061 }
2062
2063 # format marker of refs pointing to given object
2064
2065 # the destination action is chosen based on object type and current context:
2066 # - for annotated tags, we choose the tag view unless it's the current view
2067 #   already, in which case we go to shortlog view
2068 # - for other refs, we keep the current view if we're in history, shortlog or
2069 #   log view, and select shortlog otherwise
2070 sub format_ref_marker {
2071         my ($refs, $id) = @_;
2072         my $markers = '';
2073
2074         if (defined $refs->{$id}) {
2075                 foreach my $ref (@{$refs->{$id}}) {
2076                         # this code exploits the fact that non-lightweight tags are the
2077                         # only indirect objects, and that they are the only objects for which
2078                         # we want to use tag instead of shortlog as action
2079                         my ($type, $name) = qw();
2080                         my $indirect = ($ref =~ s/\^\{\}$//);
2081                         # e.g. tags/v2.6.11 or heads/next
2082                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2083                                 $type = $1;
2084                                 $name = $2;
2085                         } else {
2086                                 $type = "ref";
2087                                 $name = $ref;
2088                         }
2089
2090                         my $class = $type;
2091                         $class .= " indirect" if $indirect;
2092
2093                         my $dest_action = "shortlog";
2094
2095                         if ($indirect) {
2096                                 $dest_action = "tag" unless $action eq "tag";
2097                         } elsif ($action =~ /^(history|(short)?log)$/) {
2098                                 $dest_action = $action;
2099                         }
2100
2101                         my $dest = "";
2102                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2103                         $dest .= $ref;
2104
2105                         my $link = $cgi->a({
2106                                 -href => href(
2107                                         action=>$dest_action,
2108                                         hash=>$dest
2109                                 )}, esc_html($name));
2110
2111                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2112                                 $link . "</span>";
2113                 }
2114         }
2115
2116         if ($markers) {
2117                 return ' <span class="refs">'. $markers . '</span>';
2118         } else {
2119                 return "";
2120         }
2121 }
2122
2123 # format, perhaps shortened and with markers, title line
2124 sub format_subject_html {
2125         my ($long, $short, $href, $extra) = @_;
2126         $extra = '' unless defined($extra);
2127
2128         if (length($short) < length($long)) {
2129                 $long =~ s/[[:cntrl:]]/?/g;
2130                 return $cgi->a({-href => $href, -class => "list subject",
2131                                 -title => to_utf8($long)},
2132                        esc_html($short)) . $extra;
2133         } else {
2134                 return $cgi->a({-href => $href, -class => "list subject"},
2135                        esc_html($long)) . $extra;
2136         }
2137 }
2138
2139 # Rather than recomputing the url for an email multiple times, we cache it
2140 # after the first hit. This gives a visible benefit in views where the avatar
2141 # for the same email is used repeatedly (e.g. shortlog).
2142 # The cache is shared by all avatar engines (currently gravatar only), which
2143 # are free to use it as preferred. Since only one avatar engine is used for any
2144 # given page, there's no risk for cache conflicts.
2145 our %avatar_cache = ();
2146
2147 # Compute the picon url for a given email, by using the picon search service over at
2148 # http://www.cs.indiana.edu/picons/search.html
2149 sub picon_url {
2150         my $email = lc shift;
2151         if (!$avatar_cache{$email}) {
2152                 my ($user, $domain) = split('@', $email);
2153                 $avatar_cache{$email} =
2154                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2155                         "$domain/$user/" .
2156                         "users+domains+unknown/up/single";
2157         }
2158         return $avatar_cache{$email};
2159 }
2160
2161 # Compute the gravatar url for a given email, if it's not in the cache already.
2162 # Gravatar stores only the part of the URL before the size, since that's the
2163 # one computationally more expensive. This also allows reuse of the cache for
2164 # different sizes (for this particular engine).
2165 sub gravatar_url {
2166         my $email = lc shift;
2167         my $size = shift;
2168         $avatar_cache{$email} ||=
2169                 "//www.gravatar.com/avatar/" .
2170                         Digest::MD5::md5_hex($email) . "?s=";
2171         return $avatar_cache{$email} . $size;
2172 }
2173
2174 # Insert an avatar for the given $email at the given $size if the feature
2175 # is enabled.
2176 sub git_get_avatar {
2177         my ($email, %opts) = @_;
2178         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2179         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2180         $opts{-size} ||= 'default';
2181         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2182         my $url = "";
2183         if ($git_avatar eq 'gravatar') {
2184                 $url = gravatar_url($email, $size);
2185         } elsif ($git_avatar eq 'picon') {
2186                 $url = picon_url($email);
2187         }
2188         # Other providers can be added by extending the if chain, defining $url
2189         # as needed. If no variant puts something in $url, we assume avatars
2190         # are completely disabled/unavailable.
2191         if ($url) {
2192                 return $pre_white .
2193                        "<img width=\"$size\" " .
2194                             "class=\"avatar\" " .
2195                             "src=\"".esc_url($url)."\" " .
2196                             "alt=\"\" " .
2197                        "/>" . $post_white;
2198         } else {
2199                 return "";
2200         }
2201 }
2202
2203 sub format_search_author {
2204         my ($author, $searchtype, $displaytext) = @_;
2205         my $have_search = gitweb_check_feature('search');
2206
2207         if ($have_search) {
2208                 my $performed = "";
2209                 if ($searchtype eq 'author') {
2210                         $performed = "authored";
2211                 } elsif ($searchtype eq 'committer') {
2212                         $performed = "committed";
2213                 }
2214
2215                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2216                                 searchtext=>$author,
2217                                 searchtype=>$searchtype), class=>"list",
2218                                 title=>"Search for commits $performed by $author"},
2219                                 $displaytext);
2220
2221         } else {
2222                 return $displaytext;
2223         }
2224 }
2225
2226 # format the author name of the given commit with the given tag
2227 # the author name is chopped and escaped according to the other
2228 # optional parameters (see chop_str).
2229 sub format_author_html {
2230         my $tag = shift;
2231         my $co = shift;
2232         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2233         return "<$tag class=\"author\">" .
2234                format_search_author($co->{'author_name'}, "author",
2235                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2236                        $author) .
2237                "</$tag>";
2238 }
2239
2240 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2241 sub format_git_diff_header_line {
2242         my $line = shift;
2243         my $diffinfo = shift;
2244         my ($from, $to) = @_;
2245
2246         if ($diffinfo->{'nparents'}) {
2247                 # combined diff
2248                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2249                 if ($to->{'href'}) {
2250                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2251                                          esc_path($to->{'file'}));
2252                 } else { # file was deleted (no href)
2253                         $line .= esc_path($to->{'file'});
2254                 }
2255         } else {
2256                 # "ordinary" diff
2257                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2258                 if ($from->{'href'}) {
2259                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2260                                          'a/' . esc_path($from->{'file'}));
2261                 } else { # file was added (no href)
2262                         $line .= 'a/' . esc_path($from->{'file'});
2263                 }
2264                 $line .= ' ';
2265                 if ($to->{'href'}) {
2266                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2267                                          'b/' . esc_path($to->{'file'}));
2268                 } else { # file was deleted
2269                         $line .= 'b/' . esc_path($to->{'file'});
2270                 }
2271         }
2272
2273         return "<div class=\"diff header\">$line</div>\n";
2274 }
2275
2276 # format extended diff header line, before patch itself
2277 sub format_extended_diff_header_line {
2278         my $line = shift;
2279         my $diffinfo = shift;
2280         my ($from, $to) = @_;
2281
2282         # match <path>
2283         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2284                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2285                                        esc_path($from->{'file'}));
2286         }
2287         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2288                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2289                                  esc_path($to->{'file'}));
2290         }
2291         # match single <mode>
2292         if ($line =~ m/\s(\d{6})$/) {
2293                 $line .= '<span class="info"> (' .
2294                          file_type_long($1) .
2295                          ')</span>';
2296         }
2297         # match <hash>
2298         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2299                 # can match only for combined diff
2300                 $line = 'index ';
2301                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2302                         if ($from->{'href'}[$i]) {
2303                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2304                                                   -class=>"hash"},
2305                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2306                         } else {
2307                                 $line .= '0' x 7;
2308                         }
2309                         # separator
2310                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2311                 }
2312                 $line .= '..';
2313                 if ($to->{'href'}) {
2314                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2315                                          substr($diffinfo->{'to_id'},0,7));
2316                 } else {
2317                         $line .= '0' x 7;
2318                 }
2319
2320         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2321                 # can match only for ordinary diff
2322                 my ($from_link, $to_link);
2323                 if ($from->{'href'}) {
2324                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2325                                              substr($diffinfo->{'from_id'},0,7));
2326                 } else {
2327                         $from_link = '0' x 7;
2328                 }
2329                 if ($to->{'href'}) {
2330                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2331                                            substr($diffinfo->{'to_id'},0,7));
2332                 } else {
2333                         $to_link = '0' x 7;
2334                 }
2335                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2336                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2337         }
2338
2339         return $line . "<br/>\n";
2340 }
2341
2342 # format from-file/to-file diff header
2343 sub format_diff_from_to_header {
2344         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2345         my $line;
2346         my $result = '';
2347
2348         $line = $from_line;
2349         #assert($line =~ m/^---/) if DEBUG;
2350         # no extra formatting for "^--- /dev/null"
2351         if (! $diffinfo->{'nparents'}) {
2352                 # ordinary (single parent) diff
2353                 if ($line =~ m!^--- "?a/!) {
2354                         if ($from->{'href'}) {
2355                                 $line = '--- a/' .
2356                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2357                                                 esc_path($from->{'file'}));
2358                         } else {
2359                                 $line = '--- a/' .
2360                                         esc_path($from->{'file'});
2361                         }
2362                 }
2363                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2364
2365         } else {
2366                 # combined diff (merge commit)
2367                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2368                         if ($from->{'href'}[$i]) {
2369                                 $line = '--- ' .
2370                                         $cgi->a({-href=>href(action=>"blobdiff",
2371                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2372                                                              hash_parent_base=>$parents[$i],
2373                                                              file_parent=>$from->{'file'}[$i],
2374                                                              hash=>$diffinfo->{'to_id'},
2375                                                              hash_base=>$hash,
2376                                                              file_name=>$to->{'file'}),
2377                                                  -class=>"path",
2378                                                  -title=>"diff" . ($i+1)},
2379                                                 $i+1) .
2380                                         '/' .
2381                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2382                                                 esc_path($from->{'file'}[$i]));
2383                         } else {
2384                                 $line = '--- /dev/null';
2385                         }
2386                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2387                 }
2388         }
2389
2390         $line = $to_line;
2391         #assert($line =~ m/^\+\+\+/) if DEBUG;
2392         # no extra formatting for "^+++ /dev/null"
2393         if ($line =~ m!^\+\+\+ "?b/!) {
2394                 if ($to->{'href'}) {
2395                         $line = '+++ b/' .
2396                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2397                                         esc_path($to->{'file'}));
2398                 } else {
2399                         $line = '+++ b/' .
2400                                 esc_path($to->{'file'});
2401                 }
2402         }
2403         $result .= qq!<div class="diff to_file">$line</div>\n!;
2404
2405         return $result;
2406 }
2407
2408 # create note for patch simplified by combined diff
2409 sub format_diff_cc_simplified {
2410         my ($diffinfo, @parents) = @_;
2411         my $result = '';
2412
2413         $result .= "<div class=\"diff header\">" .
2414                    "diff --cc ";
2415         if (!is_deleted($diffinfo)) {
2416                 $result .= $cgi->a({-href => href(action=>"blob",
2417                                                   hash_base=>$hash,
2418                                                   hash=>$diffinfo->{'to_id'},
2419                                                   file_name=>$diffinfo->{'to_file'}),
2420                                     -class => "path"},
2421                                    esc_path($diffinfo->{'to_file'}));
2422         } else {
2423                 $result .= esc_path($diffinfo->{'to_file'});
2424         }
2425         $result .= "</div>\n" . # class="diff header"
2426                    "<div class=\"diff nodifferences\">" .
2427                    "Simple merge" .
2428                    "</div>\n"; # class="diff nodifferences"
2429
2430         return $result;
2431 }
2432
2433 sub diff_line_class {
2434         my ($line, $from, $to) = @_;
2435
2436         # ordinary diff
2437         my $num_sign = 1;
2438         # combined diff
2439         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2440                 $num_sign = scalar @{$from->{'href'}};
2441         }
2442
2443         my @diff_line_classifier = (
2444                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2445                 { regexp => qr/^\\/,               class => "incomplete"  },
2446                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2447                 # classifier for context must come before classifier add/rem,
2448                 # or we would have to use more complicated regexp, for example
2449                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2450                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2451                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2452         );
2453         for my $clsfy (@diff_line_classifier) {
2454                 return $clsfy->{'class'}
2455                         if ($line =~ $clsfy->{'regexp'});
2456         }
2457
2458         # fallback
2459         return "";
2460 }
2461
2462 # assumes that $from and $to are defined and correctly filled,
2463 # and that $line holds a line of chunk header for unified diff
2464 sub format_unidiff_chunk_header {
2465         my ($line, $from, $to) = @_;
2466
2467         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2468                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2469
2470         $from_lines = 0 unless defined $from_lines;
2471         $to_lines   = 0 unless defined $to_lines;
2472
2473         if ($from->{'href'}) {
2474                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2475                                      -class=>"list"}, $from_text);
2476         }
2477         if ($to->{'href'}) {
2478                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2479                                      -class=>"list"}, $to_text);
2480         }
2481         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2482                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2483         return $line;
2484 }
2485
2486 # assumes that $from and $to are defined and correctly filled,
2487 # and that $line holds a line of chunk header for combined diff
2488 sub format_cc_diff_chunk_header {
2489         my ($line, $from, $to) = @_;
2490
2491         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2492         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2493
2494         @from_text = split(' ', $ranges);
2495         for (my $i = 0; $i < @from_text; ++$i) {
2496                 ($from_start[$i], $from_nlines[$i]) =
2497                         (split(',', substr($from_text[$i], 1)), 0);
2498         }
2499
2500         $to_text   = pop @from_text;
2501         $to_start  = pop @from_start;
2502         $to_nlines = pop @from_nlines;
2503
2504         $line = "<span class=\"chunk_info\">$prefix ";
2505         for (my $i = 0; $i < @from_text; ++$i) {
2506                 if ($from->{'href'}[$i]) {
2507                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2508                                           -class=>"list"}, $from_text[$i]);
2509                 } else {
2510                         $line .= $from_text[$i];
2511                 }
2512                 $line .= " ";
2513         }
2514         if ($to->{'href'}) {
2515                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2516                                   -class=>"list"}, $to_text);
2517         } else {
2518                 $line .= $to_text;
2519         }
2520         $line .= " $prefix</span>" .
2521                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2522         return $line;
2523 }
2524
2525 # process patch (diff) line (not to be used for diff headers),
2526 # returning HTML-formatted (but not wrapped) line.
2527 # If the line is passed as a reference, it is treated as HTML and not
2528 # esc_html()'ed.
2529 sub format_diff_line {
2530         my ($line, $diff_class, $from, $to) = @_;
2531
2532         if (ref($line)) {
2533                 $line = $$line;
2534         } else {
2535                 chomp $line;
2536                 $line = untabify($line);
2537
2538                 if ($from && $to && $line =~ m/^\@{2} /) {
2539                         $line = format_unidiff_chunk_header($line, $from, $to);
2540                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2541                         $line = format_cc_diff_chunk_header($line, $from, $to);
2542                 } else {
2543                         $line = esc_html($line, -nbsp=>1);
2544                 }
2545         }
2546
2547         my $diff_classes = "diff";
2548         $diff_classes .= " $diff_class" if ($diff_class);
2549         $line = "<div class=\"$diff_classes\">$line</div>\n";
2550
2551         return $line;
2552 }
2553
2554 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2555 # linked.  Pass the hash of the tree/commit to snapshot.
2556 sub format_snapshot_links {
2557         my ($hash) = @_;
2558         my $num_fmts = @snapshot_fmts;
2559         if ($num_fmts > 1) {
2560                 # A parenthesized list of links bearing format names.
2561                 # e.g. "snapshot (_tar.gz_ _zip_)"
2562                 return "snapshot (" . join(' ', map
2563                         $cgi->a({
2564                                 -href => href(
2565                                         action=>"snapshot",
2566                                         hash=>$hash,
2567                                         snapshot_format=>$_
2568                                 )
2569                         }, $known_snapshot_formats{$_}{'display'})
2570                 , @snapshot_fmts) . ")";
2571         } elsif ($num_fmts == 1) {
2572                 # A single "snapshot" link whose tooltip bears the format name.
2573                 # i.e. "_snapshot_"
2574                 my ($fmt) = @snapshot_fmts;
2575                 return
2576                         $cgi->a({
2577                                 -href => href(
2578                                         action=>"snapshot",
2579                                         hash=>$hash,
2580                                         snapshot_format=>$fmt
2581                                 ),
2582                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2583                         }, "snapshot");
2584         } else { # $num_fmts == 0
2585                 return undef;
2586         }
2587 }
2588
2589 ## ......................................................................
2590 ## functions returning values to be passed, perhaps after some
2591 ## transformation, to other functions; e.g. returning arguments to href()
2592
2593 # returns hash to be passed to href to generate gitweb URL
2594 # in -title key it returns description of link
2595 sub get_feed_info {
2596         my $format = shift || 'Atom';
2597         my %res = (action => lc($format));
2598         my $matched_ref = 0;
2599
2600         # feed links are possible only for project views
2601         return unless (defined $project);
2602         # some views should link to OPML, or to generic project feed,
2603         # or don't have specific feed yet (so they should use generic)
2604         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2605
2606         my $branch = undef;
2607         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2608         # (fullname) to differentiate from tag links; this also makes
2609         # possible to detect branch links
2610         for my $ref (get_branch_refs()) {
2611                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2612                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2613                         $branch = $1;
2614                         $matched_ref = $ref;
2615                         last;
2616                 }
2617         }
2618         # find log type for feed description (title)
2619         my $type = 'log';
2620         if (defined $file_name) {
2621                 $type  = "history of $file_name";
2622                 $type .= "/" if ($action eq 'tree');
2623                 $type .= " on '$branch'" if (defined $branch);
2624         } else {
2625                 $type = "log of $branch" if (defined $branch);
2626         }
2627
2628         $res{-title} = $type;
2629         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2630         $res{'file_name'} = $file_name;
2631
2632         return %res;
2633 }
2634
2635 ## ----------------------------------------------------------------------
2636 ## git utility subroutines, invoking git commands
2637
2638 # returns path to the core git executable and the --git-dir parameter as list
2639 sub git_cmd {
2640         $number_of_git_cmds++;
2641         return $GIT, '--git-dir='.$git_dir;
2642 }
2643
2644 # quote the given arguments for passing them to the shell
2645 # quote_command("command", "arg 1", "arg with ' and ! characters")
2646 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2647 # Try to avoid using this function wherever possible.
2648 sub quote_command {
2649         return join(' ',
2650                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2651 }
2652
2653 # get HEAD ref of given project as hash
2654 sub git_get_head_hash {
2655         return git_get_full_hash(shift, 'HEAD');
2656 }
2657
2658 sub git_get_full_hash {
2659         return git_get_hash(@_);
2660 }
2661
2662 sub git_get_short_hash {
2663         return git_get_hash(@_, '--short=7');
2664 }
2665
2666 sub git_get_hash {
2667         my ($project, $hash, @options) = @_;
2668         my $o_git_dir = $git_dir;
2669         my $retval = undef;
2670         $git_dir = "$projectroot/$project";
2671         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2672             '--verify', '-q', @options, $hash) {
2673                 $retval = <$fd>;
2674                 chomp $retval if defined $retval;
2675                 close $fd;
2676         }
2677         if (defined $o_git_dir) {
2678                 $git_dir = $o_git_dir;
2679         }
2680         return $retval;
2681 }
2682
2683 # get type of given object
2684 sub git_get_type {
2685         my $hash = shift;
2686
2687         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2688         my $type = <$fd>;
2689         close $fd or return;
2690         chomp $type;
2691         return $type;
2692 }
2693
2694 # repository configuration
2695 our $config_file = '';
2696 our %config;
2697
2698 # store multiple values for single key as anonymous array reference
2699 # single values stored directly in the hash, not as [ <value> ]
2700 sub hash_set_multi {
2701         my ($hash, $key, $value) = @_;
2702
2703         if (!exists $hash->{$key}) {
2704                 $hash->{$key} = $value;
2705         } elsif (!ref $hash->{$key}) {
2706                 $hash->{$key} = [ $hash->{$key}, $value ];
2707         } else {
2708                 push @{$hash->{$key}}, $value;
2709         }
2710 }
2711
2712 # return hash of git project configuration
2713 # optionally limited to some section, e.g. 'gitweb'
2714 sub git_parse_project_config {
2715         my $section_regexp = shift;
2716         my %config;
2717
2718         local $/ = "\0";
2719
2720         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2721                 or return;
2722
2723         while (my $keyval = <$fh>) {
2724                 chomp $keyval;
2725                 my ($key, $value) = split(/\n/, $keyval, 2);
2726
2727                 hash_set_multi(\%config, $key, $value)
2728                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2729         }
2730         close $fh;
2731
2732         return %config;
2733 }
2734
2735 # convert config value to boolean: 'true' or 'false'
2736 # no value, number > 0, 'true' and 'yes' values are true
2737 # rest of values are treated as false (never as error)
2738 sub config_to_bool {
2739         my $val = shift;
2740
2741         return 1 if !defined $val;             # section.key
2742
2743         # strip leading and trailing whitespace
2744         $val =~ s/^\s+//;
2745         $val =~ s/\s+$//;
2746
2747         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2748                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2749 }
2750
2751 # convert config value to simple decimal number
2752 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2753 # to be multiplied by 1024, 1048576, or 1073741824
2754 sub config_to_int {
2755         my $val = shift;
2756
2757         # strip leading and trailing whitespace
2758         $val =~ s/^\s+//;
2759         $val =~ s/\s+$//;
2760
2761         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2762                 $unit = lc($unit);
2763                 # unknown unit is treated as 1
2764                 return $num * ($unit eq 'g' ? 1073741824 :
2765                                $unit eq 'm' ?    1048576 :
2766                                $unit eq 'k' ?       1024 : 1);
2767         }
2768         return $val;
2769 }
2770
2771 # convert config value to array reference, if needed
2772 sub config_to_multi {
2773         my $val = shift;
2774
2775         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2776 }
2777
2778 sub git_get_project_config {
2779         my ($key, $type) = @_;
2780
2781         return unless defined $git_dir;
2782
2783         # key sanity check
2784         return unless ($key);
2785         # only subsection, if exists, is case sensitive,
2786         # and not lowercased by 'git config -z -l'
2787         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2788                 $lo =~ s/_//g;
2789                 $key = join(".", lc($hi), $mi, lc($lo));
2790                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2791         } else {
2792                 $key = lc($key);
2793                 $key =~ s/_//g;
2794                 return if ($key =~ /\W/);
2795         }
2796         $key =~ s/^gitweb\.//;
2797
2798         # type sanity check
2799         if (defined $type) {
2800                 $type =~ s/^--//;
2801                 $type = undef
2802                         unless ($type eq 'bool' || $type eq 'int');
2803         }
2804
2805         # get config
2806         if (!defined $config_file ||
2807             $config_file ne "$git_dir/config") {
2808                 %config = git_parse_project_config('gitweb');
2809                 $config_file = "$git_dir/config";
2810         }
2811
2812         # check if config variable (key) exists
2813         return unless exists $config{"gitweb.$key"};
2814
2815         # ensure given type
2816         if (!defined $type) {
2817                 return $config{"gitweb.$key"};
2818         } elsif ($type eq 'bool') {
2819                 # backward compatibility: 'git config --bool' returns true/false
2820                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2821         } elsif ($type eq 'int') {
2822                 return config_to_int($config{"gitweb.$key"});
2823         }
2824         return $config{"gitweb.$key"};
2825 }
2826
2827 # get hash of given path at given ref
2828 sub git_get_hash_by_path {
2829         my $base = shift;
2830         my $path = shift || return undef;
2831         my $type = shift;
2832
2833         $path =~ s,/+$,,;
2834
2835         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2836                 or die_error(500, "Open git-ls-tree failed");
2837         my $line = <$fd>;
2838         close $fd or return undef;
2839
2840         if (!defined $line) {
2841                 # there is no tree or hash given by $path at $base
2842                 return undef;
2843         }
2844
2845         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2846         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2847         if (defined $type && $type ne $2) {
2848                 # type doesn't match
2849                 return undef;
2850         }
2851         return $3;
2852 }
2853
2854 # get path of entry with given hash at given tree-ish (ref)
2855 # used to get 'from' filename for combined diff (merge commit) for renames
2856 sub git_get_path_by_hash {
2857         my $base = shift || return;
2858         my $hash = shift || return;
2859
2860         local $/ = "\0";
2861
2862         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2863                 or return undef;
2864         while (my $line = <$fd>) {
2865                 chomp $line;
2866
2867                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2868                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2869                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2870                         close $fd;
2871                         return $1;
2872                 }
2873         }
2874         close $fd;
2875         return undef;
2876 }
2877
2878 ## ......................................................................
2879 ## git utility functions, directly accessing git repository
2880
2881 # get the value of config variable either from file named as the variable
2882 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2883 # configuration variable in the repository config file.
2884 sub git_get_file_or_project_config {
2885         my ($path, $name) = @_;
2886
2887         $git_dir = "$projectroot/$path";
2888         open my $fd, '<', "$git_dir/$name"
2889                 or return git_get_project_config($name);
2890         my $conf = <$fd>;
2891         close $fd;
2892         if (defined $conf) {
2893                 chomp $conf;
2894         }
2895         return $conf;
2896 }
2897
2898 sub git_get_project_description {
2899         my $path = shift;
2900         return git_get_file_or_project_config($path, 'description');
2901 }
2902
2903 sub git_get_project_category {
2904         my $path = shift;
2905         return git_get_file_or_project_config($path, 'category');
2906 }
2907
2908
2909 # supported formats:
2910 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2911 #   - if its contents is a number, use it as tag weight,
2912 #   - otherwise add a tag with weight 1
2913 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2914 #   the same value multiple times increases tag weight
2915 # * `gitweb.ctag' multi-valued repo config variable
2916 sub git_get_project_ctags {
2917         my $project = shift;
2918         my $ctags = {};
2919
2920         $git_dir = "$projectroot/$project";
2921         if (opendir my $dh, "$git_dir/ctags") {
2922                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2923                 foreach my $tagfile (@files) {
2924                         open my $ct, '<', $tagfile
2925                                 or next;
2926                         my $val = <$ct>;
2927                         chomp $val if $val;
2928                         close $ct;
2929
2930                         (my $ctag = $tagfile) =~ s#.*/##;
2931                         if ($val =~ /^\d+$/) {
2932                                 $ctags->{$ctag} = $val;
2933                         } else {
2934                                 $ctags->{$ctag} = 1;
2935                         }
2936                 }
2937                 closedir $dh;
2938
2939         } elsif (open my $fh, '<', "$git_dir/ctags") {
2940                 while (my $line = <$fh>) {
2941                         chomp $line;
2942                         $ctags->{$line}++ if $line;
2943                 }
2944                 close $fh;
2945
2946         } else {
2947                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2948                 foreach my $tag (@$taglist) {
2949                         $ctags->{$tag}++;
2950                 }
2951         }
2952
2953         return $ctags;
2954 }
2955
2956 # return hash, where keys are content tags ('ctags'),
2957 # and values are sum of weights of given tag in every project
2958 sub git_gather_all_ctags {
2959         my $projects = shift;
2960         my $ctags = {};
2961
2962         foreach my $p (@$projects) {
2963                 foreach my $ct (keys %{$p->{'ctags'}}) {
2964                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2965                 }
2966         }
2967
2968         return $ctags;
2969 }
2970
2971 sub git_populate_project_tagcloud {
2972         my $ctags = shift;
2973
2974         # First, merge different-cased tags; tags vote on casing
2975         my %ctags_lc;
2976         foreach (keys %$ctags) {
2977                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2978                 if (not $ctags_lc{lc $_}->{topcount}
2979                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2980                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2981                         $ctags_lc{lc $_}->{topname} = $_;
2982                 }
2983         }
2984
2985         my $cloud;
2986         my $matched = $input_params{'ctag'};
2987         if (eval { require HTML::TagCloud; 1; }) {
2988                 $cloud = HTML::TagCloud->new;
2989                 foreach my $ctag (sort keys %ctags_lc) {
2990                         # Pad the title with spaces so that the cloud looks
2991                         # less crammed.
2992                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2993                         $title =~ s/ /&nbsp;/g;
2994                         $title =~ s/^/&nbsp;/g;
2995                         $title =~ s/$/&nbsp;/g;
2996                         if (defined $matched && $matched eq $ctag) {
2997                                 $title = qq(<span class="match">$title</span>);
2998                         }
2999                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
3000                                     $ctags_lc{$ctag}->{count});
3001                 }
3002         } else {
3003                 $cloud = {};
3004                 foreach my $ctag (keys %ctags_lc) {
3005                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3006                         if (defined $matched && $matched eq $ctag) {
3007                                 $title = qq(<span class="match">$title</span>);
3008                         }
3009                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3010                         $cloud->{$ctag}{ctag} =
3011                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
3012                 }
3013         }
3014         return $cloud;
3015 }
3016
3017 sub git_show_project_tagcloud {
3018         my ($cloud, $count) = @_;
3019         if (ref $cloud eq 'HTML::TagCloud') {
3020                 return $cloud->html_and_css($count);
3021         } else {
3022                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3023                 return
3024                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3025                         join (', ', map {
3026                                 $cloud->{$_}->{'ctag'}
3027                         } splice(@tags, 0, $count)) .
3028                         '</div>';
3029         }
3030 }
3031
3032 sub git_get_project_url_list {
3033         my $path = shift;
3034
3035         $git_dir = "$projectroot/$path";
3036         open my $fd, '<', "$git_dir/cloneurl"
3037                 or return wantarray ?
3038                 @{ config_to_multi(git_get_project_config('url')) } :
3039                    config_to_multi(git_get_project_config('url'));
3040         my @git_project_url_list = map { chomp; $_ } <$fd>;
3041         close $fd;
3042
3043         return wantarray ? @git_project_url_list : \@git_project_url_list;
3044 }
3045
3046 sub git_get_projects_list {
3047         my $filter = shift || '';
3048         my $paranoid = shift;
3049         my @list;
3050
3051         if (-d $projects_list) {
3052                 # search in directory
3053                 my $dir = $projects_list;
3054                 # remove the trailing "/"
3055                 $dir =~ s!/+$!!;
3056                 my $pfxlen = length("$dir");
3057                 my $pfxdepth = ($dir =~ tr!/!!);
3058                 # when filtering, search only given subdirectory
3059                 if ($filter && !$paranoid) {
3060                         $dir .= "/$filter";
3061                         $dir =~ s!/+$!!;
3062                 }
3063
3064                 File::Find::find({
3065                         follow_fast => 1, # follow symbolic links
3066                         follow_skip => 2, # ignore duplicates
3067                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3068                         wanted => sub {
3069                                 # global variables
3070                                 our $project_maxdepth;
3071                                 our $projectroot;
3072                                 # skip project-list toplevel, if we get it.
3073                                 return if (m!^[/.]$!);
3074                                 # only directories can be git repositories
3075                                 return unless (-d $_);
3076                                 # need search permission
3077                                 return unless (-x $_);
3078                                 # don't traverse too deep (Find is super slow on os x)
3079                                 # $project_maxdepth excludes depth of $projectroot
3080                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3081                                         $File::Find::prune = 1;
3082                                         return;
3083                                 }
3084
3085                                 my $path = substr($File::Find::name, $pfxlen + 1);
3086                                 # paranoidly only filter here
3087                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3088                                         next;
3089                                 }
3090                                 # we check related file in $projectroot
3091                                 if (check_export_ok("$projectroot/$path")) {
3092                                         push @list, { path => $path };
3093                                         $File::Find::prune = 1;
3094                                 }
3095                         },
3096                 }, "$dir");
3097
3098         } elsif (-f $projects_list) {
3099                 # read from file(url-encoded):
3100                 # 'git%2Fgit.git Linus+Torvalds'
3101                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3102                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3103                 open my $fd, '<', $projects_list or return;
3104         PROJECT:
3105                 while (my $line = <$fd>) {
3106                         chomp $line;
3107                         my ($path, $owner) = split ' ', $line;
3108                         $path = unescape($path);
3109                         $owner = unescape($owner);
3110                         if (!defined $path) {
3111                                 next;
3112                         }
3113                         # if $filter is rpovided, check if $path begins with $filter
3114                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3115                                 next;
3116                         }
3117                         if (check_export_ok("$projectroot/$path")) {
3118                                 my $pr = {
3119                                         path => $path
3120                                 };
3121                                 if ($owner) {
3122                                         $pr->{'owner'} = to_utf8($owner);
3123                                 }
3124                                 push @list, $pr;
3125                         }
3126                 }
3127                 close $fd;
3128         }
3129         return @list;
3130 }
3131
3132 # written with help of Tree::Trie module (Perl Artistic License, GPL compatible)
3133 # as side effects it sets 'forks' field to list of forks for forked projects
3134 sub filter_forks_from_projects_list {
3135         my $projects = shift;
3136
3137         my %trie; # prefix tree of directories (path components)
3138         # generate trie out of those directories that might contain forks
3139         foreach my $pr (@$projects) {
3140                 my $path = $pr->{'path'};
3141                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3142                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3143                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3144                 next unless (-d "$projectroot/$path"); # containing directory exists
3145                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3146
3147                 # add to trie
3148                 my @dirs = split('/', $path);
3149                 # walk the trie, until either runs out of components or out of trie
3150                 my $ref = \%trie;
3151                 while (scalar @dirs &&
3152                        exists($ref->{$dirs[0]})) {
3153                         $ref = $ref->{shift @dirs};
3154                 }
3155                 # create rest of trie structure from rest of components
3156                 foreach my $dir (@dirs) {
3157                         $ref = $ref->{$dir} = {};
3158                 }
3159                 # create end marker, store $pr as a data
3160                 $ref->{''} = $pr if (!exists $ref->{''});
3161         }
3162
3163         # filter out forks, by finding shortest prefix match for paths
3164         my @filtered;
3165  PROJECT:
3166         foreach my $pr (@$projects) {
3167                 # trie lookup
3168                 my $ref = \%trie;
3169         DIR:
3170                 foreach my $dir (split('/', $pr->{'path'})) {
3171                         if (exists $ref->{''}) {
3172                                 # found [shortest] prefix, is a fork - skip it
3173                                 push @{$ref->{''}{'forks'}}, $pr;
3174                                 next PROJECT;
3175                         }
3176                         if (!exists $ref->{$dir}) {
3177                                 # not in trie, cannot have prefix, not a fork
3178                                 push @filtered, $pr;
3179                                 next PROJECT;
3180                         }
3181                         # If the dir is there, we just walk one step down the trie.
3182                         $ref = $ref->{$dir};
3183                 }
3184                 # we ran out of trie
3185                 # (shouldn't happen: it's either no match, or end marker)
3186                 push @filtered, $pr;
3187         }
3188
3189         return @filtered;
3190 }
3191
3192 # note: fill_project_list_info must be run first,
3193 # for 'descr_long' and 'ctags' to be filled
3194 sub search_projects_list {
3195         my ($projlist, %opts) = @_;
3196         my $tagfilter  = $opts{'tagfilter'};
3197         my $search_re = $opts{'search_regexp'};
3198
3199         return @$projlist
3200                 unless ($tagfilter || $search_re);
3201
3202         # searching projects require filling to be run before it;
3203         fill_project_list_info($projlist,
3204                                $tagfilter  ? 'ctags' : (),
3205                                $search_re ? ('path', 'descr') : ());
3206         my @projects;
3207  PROJECT:
3208         foreach my $pr (@$projlist) {
3209
3210                 if ($tagfilter) {
3211                         next unless ref($pr->{'ctags'}) eq 'HASH';
3212                         next unless
3213                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3214                 }
3215
3216                 if ($search_re) {
3217                         next unless
3218                                 $pr->{'path'} =~ /$search_re/ ||
3219                                 $pr->{'descr_long'} =~ /$search_re/;
3220                 }
3221
3222                 push @projects, $pr;
3223         }
3224
3225         return @projects;
3226 }
3227
3228 our $gitweb_project_owner = undef;
3229 sub git_get_project_list_from_file {
3230
3231         return if (defined $gitweb_project_owner);
3232
3233         $gitweb_project_owner = {};
3234         # read from file (url-encoded):
3235         # 'git%2Fgit.git Linus+Torvalds'
3236         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3237         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3238         if (-f $projects_list) {
3239                 open(my $fd, '<', $projects_list);
3240                 while (my $line = <$fd>) {
3241                         chomp $line;
3242                         my ($pr, $ow) = split ' ', $line;
3243                         $pr = unescape($pr);
3244                         $ow = unescape($ow);
3245                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3246                 }
3247                 close $fd;
3248         }
3249 }
3250
3251 sub git_get_project_owner {
3252         my $project = shift;
3253         my $owner;
3254
3255         return undef unless $project;
3256         $git_dir = "$projectroot/$project";
3257
3258         if (!defined $gitweb_project_owner) {
3259                 git_get_project_list_from_file();
3260         }
3261
3262         if (exists $gitweb_project_owner->{$project}) {
3263                 $owner = $gitweb_project_owner->{$project};
3264         }
3265         if (!defined $owner){
3266                 $owner = git_get_project_config('owner');
3267         }
3268         if (!defined $owner) {
3269                 $owner = get_file_owner("$git_dir");
3270         }
3271
3272         return $owner;
3273 }
3274
3275 sub git_get_last_activity {
3276         my ($path) = @_;
3277         my $fd;
3278
3279         $git_dir = "$projectroot/$path";
3280         open($fd, "-|", git_cmd(), 'for-each-ref',
3281              '--format=%(committer)',
3282              '--sort=-committerdate',
3283              '--count=1',
3284              map { "refs/$_" } get_branch_refs ()) or return;
3285         my $most_recent = <$fd>;
3286         close $fd or return;
3287         if (defined $most_recent &&
3288             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3289                 my $timestamp = $1;
3290                 my $age = time - $timestamp;
3291                 return ($age, age_string($age));
3292         }
3293         return (undef, undef);
3294 }
3295
3296 # Implementation note: when a single remote is wanted, we cannot use 'git
3297 # remote show -n' because that command always work (assuming it's a remote URL
3298 # if it's not defined), and we cannot use 'git remote show' because that would
3299 # try to make a network roundtrip. So the only way to find if that particular
3300 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3301 # and when we find what we want.
3302 sub git_get_remotes_list {
3303         my $wanted = shift;
3304         my %remotes = ();
3305
3306         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3307         return unless $fd;
3308         while (my $remote = <$fd>) {
3309                 chomp $remote;
3310                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3311                 next if $wanted and not $remote eq $wanted;
3312                 my ($url, $key) = ($1, $2);
3313
3314                 $remotes{$remote} ||= { 'heads' => () };
3315                 $remotes{$remote}{$key} = $url;
3316         }
3317         close $fd or return;
3318         return wantarray ? %remotes : \%remotes;
3319 }
3320
3321 # Takes a hash of remotes as first parameter and fills it by adding the
3322 # available remote heads for each of the indicated remotes.
3323 sub fill_remote_heads {
3324         my $remotes = shift;
3325         my @heads = map { "remotes/$_" } keys %$remotes;
3326         my @remoteheads = git_get_heads_list(undef, @heads);
3327         foreach my $remote (keys %$remotes) {
3328                 $remotes->{$remote}{'heads'} = [ grep {
3329                         $_->{'name'} =~ s!^$remote/!!
3330                         } @remoteheads ];
3331         }
3332 }
3333
3334 sub git_get_references {
3335         my $type = shift || "";
3336         my %refs;
3337         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3338         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3339         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3340                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3341                 or return;
3342
3343         while (my $line = <$fd>) {
3344                 chomp $line;
3345                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3346                         if (defined $refs{$1}) {
3347                                 push @{$refs{$1}}, $2;
3348                         } else {
3349                                 $refs{$1} = [ $2 ];
3350                         }
3351                 }
3352         }
3353         close $fd or return;
3354         return \%refs;
3355 }
3356
3357 sub git_get_rev_name_tags {
3358         my $hash = shift || return undef;
3359
3360         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3361                 or return;
3362         my $name_rev = <$fd>;
3363         close $fd;
3364
3365         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3366                 return $1;
3367         } else {
3368                 # catches also '$hash undefined' output
3369                 return undef;
3370         }
3371 }
3372
3373 ## ----------------------------------------------------------------------
3374 ## parse to hash functions
3375
3376 sub parse_date {
3377         my $epoch = shift;
3378         my $tz = shift || "-0000";
3379
3380         my %date;
3381         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3382         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3383         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3384         $date{'hour'} = $hour;
3385         $date{'minute'} = $min;
3386         $date{'mday'} = $mday;
3387         $date{'day'} = $days[$wday];
3388         $date{'month'} = $months[$mon];
3389         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3390                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3391         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3392                              $mday, $months[$mon], $hour ,$min;
3393         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3394                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3395
3396         my ($tz_sign, $tz_hour, $tz_min) =
3397                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3398         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3399         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3400         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3401         $date{'hour_local'} = $hour;
3402         $date{'minute_local'} = $min;
3403         $date{'tz_local'} = $tz;
3404         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3405                                   1900+$year, $mon+1, $mday,
3406                                   $hour, $min, $sec, $tz);
3407         return %date;
3408 }
3409
3410 sub parse_tag {
3411         my $tag_id = shift;
3412         my %tag;
3413         my @comment;
3414
3415         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3416         $tag{'id'} = $tag_id;
3417         while (my $line = <$fd>) {
3418                 chomp $line;
3419                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3420                         $tag{'object'} = $1;
3421                 } elsif ($line =~ m/^type (.+)$/) {
3422                         $tag{'type'} = $1;
3423                 } elsif ($line =~ m/^tag (.+)$/) {
3424                         $tag{'name'} = $1;
3425                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3426                         $tag{'author'} = $1;
3427                         $tag{'author_epoch'} = $2;
3428                         $tag{'author_tz'} = $3;
3429                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3430                                 $tag{'author_name'}  = $1;
3431                                 $tag{'author_email'} = $2;
3432                         } else {
3433                                 $tag{'author_name'} = $tag{'author'};
3434                         }
3435                 } elsif ($line =~ m/--BEGIN/) {
3436                         push @comment, $line;
3437                         last;
3438                 } elsif ($line eq "") {
3439                         last;
3440                 }
3441         }
3442         push @comment, <$fd>;
3443         $tag{'comment'} = \@comment;
3444         close $fd or return;
3445         if (!defined $tag{'name'}) {
3446                 return
3447         };
3448         return %tag
3449 }
3450
3451 sub parse_commit_text {
3452         my ($commit_text, $withparents) = @_;
3453         my @commit_lines = split '\n', $commit_text;
3454         my %co;
3455
3456         pop @commit_lines; # Remove '\0'
3457
3458         if (! @commit_lines) {
3459                 return;
3460         }
3461
3462         my $header = shift @commit_lines;
3463         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3464                 return;
3465         }
3466         ($co{'id'}, my @parents) = split ' ', $header;
3467         while (my $line = shift @commit_lines) {
3468                 last if $line eq "\n";
3469                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3470                         $co{'tree'} = $1;
3471                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3472                         push @parents, $1;
3473                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3474                         $co{'author'} = to_utf8($1);
3475                         $co{'author_epoch'} = $2;
3476                         $co{'author_tz'} = $3;
3477                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3478                                 $co{'author_name'}  = $1;
3479                                 $co{'author_email'} = $2;
3480                         } else {
3481                                 $co{'author_name'} = $co{'author'};
3482                         }
3483                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3484                         $co{'committer'} = to_utf8($1);
3485                         $co{'committer_epoch'} = $2;
3486                         $co{'committer_tz'} = $3;
3487                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3488                                 $co{'committer_name'}  = $1;
3489                                 $co{'committer_email'} = $2;
3490                         } else {
3491                                 $co{'committer_name'} = $co{'committer'};
3492                         }
3493                 }
3494         }
3495         if (!defined $co{'tree'}) {
3496                 return;
3497         };
3498         $co{'parents'} = \@parents;
3499         $co{'parent'} = $parents[0];
3500
3501         foreach my $title (@commit_lines) {
3502                 $title =~ s/^    //;
3503                 if ($title ne "") {
3504                         $co{'title'} = chop_str($title, 80, 5);
3505                         # remove leading stuff of merges to make the interesting part visible
3506                         if (length($title) > 50) {
3507                                 $title =~ s/^Automatic //;
3508                                 $title =~ s/^merge (of|with) /Merge ... /i;
3509                                 if (length($title) > 50) {
3510                                         $title =~ s/(http|rsync):\/\///;
3511                                 }
3512                                 if (length($title) > 50) {
3513                                         $title =~ s/(master|www|rsync)\.//;
3514                                 }
3515                                 if (length($title) > 50) {
3516                                         $title =~ s/kernel.org:?//;
3517                                 }
3518                                 if (length($title) > 50) {
3519                                         $title =~ s/\/pub\/scm//;
3520                                 }
3521                         }
3522                         $co{'title_short'} = chop_str($title, 50, 5);
3523                         last;
3524                 }
3525         }
3526         if (! defined $co{'title'} || $co{'title'} eq "") {
3527                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3528         }
3529         # remove added spaces
3530         foreach my $line (@commit_lines) {
3531                 $line =~ s/^    //;
3532         }
3533         $co{'comment'} = \@commit_lines;
3534
3535         my $age = time - $co{'committer_epoch'};
3536         $co{'age'} = $age;
3537         $co{'age_string'} = age_string($age);
3538         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3539         if ($age > 60*60*24*7*2) {
3540                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3541                 $co{'age_string_age'} = $co{'age_string'};
3542         } else {
3543                 $co{'age_string_date'} = $co{'age_string'};
3544                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3545         }
3546         return %co;
3547 }
3548
3549 sub parse_commit {
3550         my ($commit_id) = @_;
3551         my %co;
3552
3553         local $/ = "\0";
3554
3555         open my $fd, "-|", git_cmd(), "rev-list",
3556                 "--parents",
3557                 "--header",
3558                 "--max-count=1",
3559                 $commit_id,
3560                 "--",
3561                 or die_error(500, "Open git-rev-list failed");
3562         %co = parse_commit_text(<$fd>, 1);
3563         close $fd;
3564
3565         return %co;
3566 }
3567
3568 sub parse_commits {
3569         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3570         my @cos;
3571
3572         $maxcount ||= 1;
3573         $skip ||= 0;
3574
3575         local $/ = "\0";
3576
3577         open my $fd, "-|", git_cmd(), "rev-list",
3578                 "--header",
3579                 @args,
3580                 ("--max-count=" . $maxcount),
3581                 ("--skip=" . $skip),
3582                 @extra_options,
3583                 $commit_id,
3584                 "--",
3585                 ($filename ? ($filename) : ())
3586                 or die_error(500, "Open git-rev-list failed");
3587         while (my $line = <$fd>) {
3588                 my %co = parse_commit_text($line);
3589                 push @cos, \%co;
3590         }
3591         close $fd;
3592
3593         return wantarray ? @cos : \@cos;
3594 }
3595
3596 # parse line of git-diff-tree "raw" output
3597 sub parse_difftree_raw_line {
3598         my $line = shift;
3599         my %res;
3600
3601         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3602         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3603         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3604                 $res{'from_mode'} = $1;
3605                 $res{'to_mode'} = $2;
3606                 $res{'from_id'} = $3;
3607                 $res{'to_id'} = $4;
3608                 $res{'status'} = $5;
3609                 $res{'similarity'} = $6;
3610                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3611                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3612                 } else {
3613                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3614                 }
3615         }
3616         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3617         # combined diff (for merge commit)
3618         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3619                 $res{'nparents'}  = length($1);
3620                 $res{'from_mode'} = [ split(' ', $2) ];
3621                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3622                 $res{'from_id'} = [ split(' ', $3) ];
3623                 $res{'to_id'} = pop @{$res{'from_id'}};
3624                 $res{'status'} = [ split('', $4) ];
3625                 $res{'to_file'} = unquote($5);
3626         }
3627         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3628         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3629                 $res{'commit'} = $1;
3630         }
3631
3632         return wantarray ? %res : \%res;
3633 }
3634
3635 # wrapper: return parsed line of git-diff-tree "raw" output
3636 # (the argument might be raw line, or parsed info)
3637 sub parsed_difftree_line {
3638         my $line_or_ref = shift;
3639
3640         if (ref($line_or_ref) eq "HASH") {
3641                 # pre-parsed (or generated by hand)
3642                 return $line_or_ref;
3643         } else {
3644                 return parse_difftree_raw_line($line_or_ref);
3645         }
3646 }
3647
3648 # parse line of git-ls-tree output
3649 sub parse_ls_tree_line {
3650         my $line = shift;
3651         my %opts = @_;
3652         my %res;
3653
3654         if ($opts{'-l'}) {
3655                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3656                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3657
3658                 $res{'mode'} = $1;
3659                 $res{'type'} = $2;
3660                 $res{'hash'} = $3;
3661                 $res{'size'} = $4;
3662                 if ($opts{'-z'}) {
3663                         $res{'name'} = $5;
3664                 } else {
3665                         $res{'name'} = unquote($5);
3666                 }
3667         } else {
3668                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3669                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3670
3671                 $res{'mode'} = $1;
3672                 $res{'type'} = $2;
3673                 $res{'hash'} = $3;
3674                 if ($opts{'-z'}) {
3675                         $res{'name'} = $4;
3676                 } else {
3677                         $res{'name'} = unquote($4);
3678                 }
3679         }
3680
3681         return wantarray ? %res : \%res;
3682 }
3683
3684 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3685 sub parse_from_to_diffinfo {
3686         my ($diffinfo, $from, $to, @parents) = @_;
3687
3688         if ($diffinfo->{'nparents'}) {
3689                 # combined diff
3690                 $from->{'file'} = [];
3691                 $from->{'href'} = [];
3692                 fill_from_file_info($diffinfo, @parents)
3693                         unless exists $diffinfo->{'from_file'};
3694                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3695                         $from->{'file'}[$i] =
3696                                 defined $diffinfo->{'from_file'}[$i] ?
3697                                         $diffinfo->{'from_file'}[$i] :
3698                                         $diffinfo->{'to_file'};
3699                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3700                                 $from->{'href'}[$i] = href(action=>"blob",
3701                                                            hash_base=>$parents[$i],
3702                                                            hash=>$diffinfo->{'from_id'}[$i],
3703                                                            file_name=>$from->{'file'}[$i]);
3704                         } else {
3705                                 $from->{'href'}[$i] = undef;
3706                         }
3707                 }
3708         } else {
3709                 # ordinary (not combined) diff
3710                 $from->{'file'} = $diffinfo->{'from_file'};
3711                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3712                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3713                                                hash=>$diffinfo->{'from_id'},
3714                                                file_name=>$from->{'file'});
3715                 } else {
3716                         delete $from->{'href'};
3717                 }
3718         }
3719
3720         $to->{'file'} = $diffinfo->{'to_file'};
3721         if (!is_deleted($diffinfo)) { # file exists in result
3722                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3723                                      hash=>$diffinfo->{'to_id'},
3724                                      file_name=>$to->{'file'});
3725         } else {
3726                 delete $to->{'href'};
3727         }
3728 }
3729
3730 ## ......................................................................
3731 ## parse to array of hashes functions
3732
3733 sub git_get_heads_list {
3734         my ($limit, @classes) = @_;
3735         @classes = get_branch_refs() unless @classes;
3736         my @patterns = map { "refs/$_" } @classes;
3737         my @headslist;
3738
3739         open my $fd, '-|', git_cmd(), 'for-each-ref',
3740                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3741                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3742                 @patterns
3743                 or return;
3744         while (my $line = <$fd>) {
3745                 my %ref_item;
3746
3747                 chomp $line;
3748                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3749                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3750                 my ($committer, $epoch, $tz) =
3751                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3752                 $ref_item{'fullname'}  = $name;
3753                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3754                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3755                 $ref_item{'name'} = $name;
3756                 # for refs neither in 'heads' nor 'remotes' we want to
3757                 # show their ref dir
3758                 my $ref_dir = (defined $1) ? $1 : '';
3759                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3760                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3761                 }
3762
3763                 $ref_item{'id'}    = $hash;
3764                 $ref_item{'title'} = $title || '(no commit message)';
3765                 $ref_item{'epoch'} = $epoch;
3766                 if ($epoch) {
3767                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3768                 } else {
3769                         $ref_item{'age'} = "unknown";
3770                 }
3771
3772                 push @headslist, \%ref_item;
3773         }
3774         close $fd;
3775
3776         return wantarray ? @headslist : \@headslist;
3777 }
3778
3779 sub git_get_tags_list {
3780         my $limit = shift;
3781         my @tagslist;
3782
3783         open my $fd, '-|', git_cmd(), 'for-each-ref',
3784                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3785                 '--format=%(objectname) %(objecttype) %(refname) '.
3786                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3787                 'refs/tags'
3788                 or return;
3789         while (my $line = <$fd>) {
3790                 my %ref_item;
3791
3792                 chomp $line;
3793                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3794                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3795                 my ($creator, $epoch, $tz) =
3796                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3797                 $ref_item{'fullname'} = $name;
3798                 $name =~ s!^refs/tags/!!;
3799
3800                 $ref_item{'type'} = $type;
3801                 $ref_item{'id'} = $id;
3802                 $ref_item{'name'} = $name;
3803                 if ($type eq "tag") {
3804                         $ref_item{'subject'} = $title;
3805                         $ref_item{'reftype'} = $reftype;
3806                         $ref_item{'refid'}   = $refid;
3807                 } else {
3808                         $ref_item{'reftype'} = $type;
3809                         $ref_item{'refid'}   = $id;
3810                 }
3811
3812                 if ($type eq "tag" || $type eq "commit") {
3813                         $ref_item{'epoch'} = $epoch;
3814                         if ($epoch) {
3815                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3816                         } else {
3817                                 $ref_item{'age'} = "unknown";
3818                         }
3819                 }
3820
3821                 push @tagslist, \%ref_item;
3822         }
3823         close $fd;
3824
3825         return wantarray ? @tagslist : \@tagslist;
3826 }
3827
3828 ## ----------------------------------------------------------------------
3829 ## filesystem-related functions
3830
3831 sub get_file_owner {
3832         my $path = shift;
3833
3834         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3835         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3836         if (!defined $gcos) {
3837                 return undef;
3838         }
3839         my $owner = $gcos;
3840         $owner =~ s/[,;].*$//;
3841         return to_utf8($owner);
3842 }
3843
3844 # assume that file exists
3845 sub insert_file {
3846         my $filename = shift;
3847
3848         open my $fd, '<', $filename;
3849         print map { to_utf8($_) } <$fd>;
3850         close $fd;
3851 }
3852
3853 ## ......................................................................
3854 ## mimetype related functions
3855
3856 sub mimetype_guess_file {
3857         my $filename = shift;
3858         my $mimemap = shift;
3859         -r $mimemap or return undef;
3860
3861         my %mimemap;
3862         open(my $mh, '<', $mimemap) or return undef;
3863         while (<$mh>) {
3864                 next if m/^#/; # skip comments
3865                 my ($mimetype, @exts) = split(/\s+/);
3866                 foreach my $ext (@exts) {
3867                         $mimemap{$ext} = $mimetype;
3868                 }
3869         }
3870         close($mh);
3871
3872         $filename =~ /\.([^.]*)$/;
3873         return $mimemap{$1};
3874 }
3875
3876 sub mimetype_guess {
3877         my $filename = shift;
3878         my $mime;
3879         $filename =~ /\./ or return undef;
3880
3881         if ($mimetypes_file) {
3882                 my $file = $mimetypes_file;
3883                 if ($file !~ m!^/!) { # if it is relative path
3884                         # it is relative to project
3885                         $file = "$projectroot/$project/$file";
3886                 }
3887                 $mime = mimetype_guess_file($filename, $file);
3888         }
3889         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3890         return $mime;
3891 }
3892
3893 sub blob_mimetype {
3894         my $fd = shift;
3895         my $filename = shift;
3896
3897         if ($filename) {
3898                 my $mime = mimetype_guess($filename);
3899                 $mime and return $mime;
3900         }
3901
3902         # just in case
3903         return $default_blob_plain_mimetype unless $fd;
3904
3905         if (-T $fd) {
3906                 return 'text/plain';
3907         } elsif (! $filename) {
3908                 return 'application/octet-stream';
3909         } elsif ($filename =~ m/\.png$/i) {
3910                 return 'image/png';
3911         } elsif ($filename =~ m/\.gif$/i) {
3912                 return 'image/gif';
3913         } elsif ($filename =~ m/\.jpe?g$/i) {
3914                 return 'image/jpeg';
3915         } else {
3916                 return 'application/octet-stream';
3917         }
3918 }
3919
3920 sub blob_contenttype {
3921         my ($fd, $file_name, $type) = @_;
3922
3923         $type ||= blob_mimetype($fd, $file_name);
3924         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3925                 $type .= "; charset=$default_text_plain_charset";
3926         }
3927
3928         return $type;
3929 }
3930
3931 # guess file syntax for syntax highlighting; return undef if no highlighting
3932 # the name of syntax can (in the future) depend on syntax highlighter used
3933 sub guess_file_syntax {
3934         my ($highlight, $file_name) = @_;
3935         return undef unless ($highlight && defined $file_name);
3936         my $basename = basename($file_name, '.in');
3937         return $highlight_basename{$basename}
3938                 if exists $highlight_basename{$basename};
3939
3940         $basename =~ /\.([^.]*)$/;
3941         my $ext = $1 or return undef;
3942         return $highlight_ext{$ext}
3943                 if exists $highlight_ext{$ext};
3944
3945         return undef;
3946 }
3947
3948 # run highlighter and return FD of its output,
3949 # or return original FD if no highlighting
3950 sub run_highlighter {
3951         my ($fd, $highlight, $syntax) = @_;
3952         return $fd unless ($highlight);
3953
3954         close $fd;
3955         my $syntax_arg = (defined $syntax) ? "--syntax $syntax" : "--force";
3956         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3957                   quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
3958                     '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
3959                     '--', "-fe=$fallback_encoding")." | ".
3960                   quote_command($highlight_bin).
3961                   " --replace-tabs=8 --fragment $syntax_arg |"
3962                 or die_error(500, "Couldn't open file or run syntax highlighter");
3963         return $fd;
3964 }
3965
3966 ## ======================================================================
3967 ## functions printing HTML: header, footer, error page
3968
3969 sub get_page_title {
3970         my $title = to_utf8($site_name);
3971
3972         unless (defined $project) {
3973                 if (defined $project_filter) {
3974                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3975                 }
3976                 return $title;
3977         }
3978         $title .= " - " . to_utf8($project);
3979
3980         return $title unless (defined $action);
3981         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3982
3983         return $title unless (defined $file_name);
3984         $title .= " - " . esc_path($file_name);
3985         if ($action eq "tree" && $file_name !~ m|/$|) {
3986                 $title .= "/";
3987         }
3988
3989         return $title;
3990 }
3991
3992 sub get_content_type_html {
3993         # require explicit support from the UA if we are to send the page as
3994         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3995         # we have to do this because MSIE sometimes globs '*/*', pretending to
3996         # support xhtml+xml but choking when it gets what it asked for.
3997         if (defined $cgi->http('HTTP_ACCEPT') &&
3998             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3999             $cgi->Accept('application/xhtml+xml') != 0) {
4000                 return 'application/xhtml+xml';
4001         } else {
4002                 return 'text/html';
4003         }
4004 }
4005
4006 sub print_feed_meta {
4007         if (defined $project) {
4008                 my %href_params = get_feed_info();
4009                 if (!exists $href_params{'-title'}) {
4010                         $href_params{'-title'} = 'log';
4011                 }
4012
4013                 foreach my $format (qw(RSS Atom)) {
4014                         my $type = lc($format);
4015                         my %link_attr = (
4016                                 '-rel' => 'alternate',
4017                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4018                                 '-type' => "application/$type+xml"
4019                         );
4020
4021                         $href_params{'extra_options'} = undef;
4022                         $href_params{'action'} = $type;
4023                         $link_attr{'-href'} = href(%href_params);
4024                         print "<link ".
4025                               "rel=\"$link_attr{'-rel'}\" ".
4026                               "title=\"$link_attr{'-title'}\" ".
4027                               "href=\"$link_attr{'-href'}\" ".
4028                               "type=\"$link_attr{'-type'}\" ".
4029                               "/>\n";
4030
4031                         $href_params{'extra_options'} = '--no-merges';
4032                         $link_attr{'-href'} = href(%href_params);
4033                         $link_attr{'-title'} .= ' (no merges)';
4034                         print "<link ".
4035                               "rel=\"$link_attr{'-rel'}\" ".
4036                               "title=\"$link_attr{'-title'}\" ".
4037                               "href=\"$link_attr{'-href'}\" ".
4038                               "type=\"$link_attr{'-type'}\" ".
4039                               "/>\n";
4040                 }
4041
4042         } else {
4043                 printf('<link rel="alternate" title="%s projects list" '.
4044                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4045                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4046                 printf('<link rel="alternate" title="%s projects feeds" '.
4047                        'href="%s" type="text/x-opml" />'."\n",
4048                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4049         }
4050 }
4051
4052 sub print_header_links {
4053         my $status = shift;
4054
4055         # print out each stylesheet that exist, providing backwards capability
4056         # for those people who defined $stylesheet in a config file
4057         if (defined $stylesheet) {
4058                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4059         } else {
4060                 foreach my $stylesheet (@stylesheets) {
4061                         next unless $stylesheet;
4062                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4063                 }
4064         }
4065         print_feed_meta()
4066                 if ($status eq '200 OK');
4067         if (defined $favicon) {
4068                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4069         }
4070 }
4071
4072 sub print_nav_breadcrumbs_path {
4073         my $dirprefix = undef;
4074         while (my $part = shift) {
4075                 $dirprefix .= "/" if defined $dirprefix;
4076                 $dirprefix .= $part;
4077                 print $cgi->a({-href => href(project => undef,
4078                                              project_filter => $dirprefix,
4079                                              action => "project_list")},
4080                               esc_html($part)) . " / ";
4081         }
4082 }
4083
4084 sub print_nav_breadcrumbs {
4085         my %opts = @_;
4086
4087         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4088                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4089         }
4090         if (defined $project) {
4091                 my @dirname = split '/', $project;
4092                 my $projectbasename = pop @dirname;
4093                 print_nav_breadcrumbs_path(@dirname);
4094                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4095                 if (defined $action) {
4096                         my $action_print = $action ;
4097                         if (defined $opts{-action_extra}) {
4098                                 $action_print = $cgi->a({-href => href(action=>$action)},
4099                                         $action);
4100                         }
4101                         print " / $action_print";
4102                 }
4103                 if (defined $opts{-action_extra}) {
4104                         print " / $opts{-action_extra}";
4105                 }
4106                 print "\n";
4107         } elsif (defined $project_filter) {
4108                 print_nav_breadcrumbs_path(split '/', $project_filter);
4109         }
4110 }
4111
4112 sub print_search_form {
4113         if (!defined $searchtext) {
4114                 $searchtext = "";
4115         }
4116         my $search_hash;
4117         if (defined $hash_base) {
4118                 $search_hash = $hash_base;
4119         } elsif (defined $hash) {
4120                 $search_hash = $hash;
4121         } else {
4122                 $search_hash = "HEAD";
4123         }
4124         my $action = $my_uri;
4125         my $use_pathinfo = gitweb_check_feature('pathinfo');
4126         if ($use_pathinfo) {
4127                 $action .= "/".esc_url($project);
4128         }
4129         print $cgi->start_form(-method => "get", -action => $action) .
4130               "<div class=\"search\">\n" .
4131               (!$use_pathinfo &&
4132               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4133               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4134               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4135               $cgi->popup_menu(-name => 'st', -default => 'commit',
4136                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4137               " " . $cgi->a({-href => href(action=>"search_help"),
4138                              -title => "search help" }, "?") . " search:\n",
4139               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4140               "<span title=\"Extended regular expression\">" .
4141               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4142                              -checked => $search_use_regexp) .
4143               "</span>" .
4144               "</div>" .
4145               $cgi->end_form() . "\n";
4146 }
4147
4148 sub git_header_html {
4149         my $status = shift || "200 OK";
4150         my $expires = shift;
4151         my %opts = @_;
4152
4153         my $title = get_page_title();
4154         my $content_type = get_content_type_html();
4155         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4156                            -status=> $status, -expires => $expires)
4157                 unless ($opts{'-no_http_header'});
4158         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4159         print <<EOF;
4160 <?xml version="1.0" encoding="utf-8"?>
4161 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4162 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4163 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4164 <!-- git core binaries version $git_version -->
4165 <head>
4166 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4167 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4168 <meta name="robots" content="index, nofollow"/>
4169 <title>$title</title>
4170 EOF
4171         # the stylesheet, favicon etc urls won't work correctly with path_info
4172         # unless we set the appropriate base URL
4173         if ($ENV{'PATH_INFO'}) {
4174                 print "<base href=\"".esc_url($base_url)."\" />\n";
4175         }
4176         print_header_links($status);
4177
4178         if (defined $site_html_head_string) {
4179                 print to_utf8($site_html_head_string);
4180         }
4181
4182         print "</head>\n" .
4183               "<body>\n";
4184
4185         if (defined $site_header && -f $site_header) {
4186                 insert_file($site_header);
4187         }
4188
4189         print "<div class=\"page_header\">\n";
4190         if (defined $logo) {
4191                 print $cgi->a({-href => esc_url($logo_url),
4192                                -title => $logo_label},
4193                               $cgi->img({-src => esc_url($logo),
4194                                          -width => 72, -height => 27,
4195                                          -alt => "git",
4196                                          -class => "logo"}));
4197         }
4198         print_nav_breadcrumbs(%opts);
4199         print "</div>\n";
4200
4201         my $have_search = gitweb_check_feature('search');
4202         if (defined $project && $have_search) {
4203                 print_search_form();
4204         }
4205 }
4206
4207 sub git_footer_html {
4208         my $feed_class = 'rss_logo';
4209
4210         print "<div class=\"page_footer\">\n";
4211         if (defined $project) {
4212                 my $descr = git_get_project_description($project);
4213                 if (defined $descr) {
4214                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4215                 }
4216
4217                 my %href_params = get_feed_info();
4218                 if (!%href_params) {
4219                         $feed_class .= ' generic';
4220                 }
4221                 $href_params{'-title'} ||= 'log';
4222
4223                 foreach my $format (qw(RSS Atom)) {
4224                         $href_params{'action'} = lc($format);
4225                         print $cgi->a({-href => href(%href_params),
4226                                       -title => "$href_params{'-title'} $format feed",
4227                                       -class => $feed_class}, $format)."\n";
4228                 }
4229
4230         } else {
4231                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4232                                              project_filter => $project_filter),
4233                               -class => $feed_class}, "OPML") . " ";
4234                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4235                                              project_filter => $project_filter),
4236                               -class => $feed_class}, "TXT") . "\n";
4237         }
4238         print "</div>\n"; # class="page_footer"
4239
4240         if (defined $t0 && gitweb_check_feature('timed')) {
4241                 print "<div id=\"generating_info\">\n";
4242                 print 'This page took '.
4243                       '<span id="generating_time" class="time_span">'.
4244                       tv_interval($t0, [ gettimeofday() ]).
4245                       ' seconds </span>'.
4246                       ' and '.
4247                       '<span id="generating_cmd">'.
4248                       $number_of_git_cmds.
4249                       '</span> git commands '.
4250                       " to generate.\n";
4251                 print "</div>\n"; # class="page_footer"
4252         }
4253
4254         if (defined $site_footer && -f $site_footer) {
4255                 insert_file($site_footer);
4256         }
4257
4258         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4259         if (defined $action &&
4260             $action eq 'blame_incremental') {
4261                 print qq!<script type="text/javascript">\n!.
4262                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4263                       qq!           "!. href() .qq!");\n!.
4264                       qq!</script>\n!;
4265         } else {
4266                 my ($jstimezone, $tz_cookie, $datetime_class) =
4267                         gitweb_get_feature('javascript-timezone');
4268
4269                 print qq!<script type="text/javascript">\n!.
4270                       qq!window.onload = function () {\n!;
4271                 if (gitweb_check_feature('javascript-actions')) {
4272                         print qq!       fixLinks();\n!;
4273                 }
4274                 if ($jstimezone && $tz_cookie && $datetime_class) {
4275                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4276                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4277                 }
4278                 print qq!};\n!.
4279                       qq!</script>\n!;
4280         }
4281
4282         print "</body>\n" .
4283               "</html>";
4284 }
4285
4286 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4287 # Example: die_error(404, 'Hash not found')
4288 # By convention, use the following status codes (as defined in RFC 2616):
4289 # 400: Invalid or missing CGI parameters, or
4290 #      requested object exists but has wrong type.
4291 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4292 #      this server or project.
4293 # 404: Requested object/revision/project doesn't exist.
4294 # 500: The server isn't configured properly, or
4295 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4296 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4297 # 503: The server is currently unavailable (because it is overloaded,
4298 #      or down for maintenance).  Generally, this is a temporary state.
4299 sub die_error {
4300         my $status = shift || 500;
4301         my $error = esc_html(shift) || "Internal Server Error";
4302         my $extra = shift;
4303         my %opts = @_;
4304
4305         my %http_responses = (
4306                 400 => '400 Bad Request',
4307                 403 => '403 Forbidden',
4308                 404 => '404 Not Found',
4309                 500 => '500 Internal Server Error',
4310                 503 => '503 Service Unavailable',
4311         );
4312         git_header_html($http_responses{$status}, undef, %opts);
4313         print <<EOF;
4314 <div class="page_body">
4315 <br /><br />
4316 $status - $error
4317 <br />
4318 EOF
4319         if (defined $extra) {
4320                 print "<hr />\n" .
4321                       "$extra\n";
4322         }
4323         print "</div>\n";
4324
4325         git_footer_html();
4326         goto DONE_GITWEB
4327                 unless ($opts{'-error_handler'});
4328 }
4329
4330 ## ----------------------------------------------------------------------
4331 ## functions printing or outputting HTML: navigation
4332
4333 sub git_print_page_nav {
4334         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4335         $extra = '' if !defined $extra; # pager or formats
4336
4337         my @navs = qw(summary shortlog log commit commitdiff tree);
4338         if ($suppress) {
4339                 @navs = grep { $_ ne $suppress } @navs;
4340         }
4341
4342         my %arg = map { $_ => {action=>$_} } @navs;
4343         if (defined $head) {
4344                 for (qw(commit commitdiff)) {
4345                         $arg{$_}{'hash'} = $head;
4346                 }
4347                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4348                         for (qw(shortlog log)) {
4349                                 $arg{$_}{'hash'} = $head;
4350                         }
4351                 }
4352         }
4353
4354         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4355         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4356
4357         my @actions = gitweb_get_feature('actions');
4358         my %repl = (
4359                 '%' => '%',
4360                 'n' => $project,         # project name
4361                 'f' => $git_dir,         # project path within filesystem
4362                 'h' => $treehead || '',  # current hash ('h' parameter)
4363                 'b' => $treebase || '',  # hash base ('hb' parameter)
4364         );
4365         while (@actions) {
4366                 my ($label, $link, $pos) = splice(@actions,0,3);
4367                 # insert
4368                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4369                 # munch munch
4370                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4371                 $arg{$label}{'_href'} = $link;
4372         }
4373
4374         print "<div class=\"page_nav\">\n" .
4375                 (join " | ",
4376                  map { $_ eq $current ?
4377                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4378                  } @navs);
4379         print "<br/>\n$extra<br/>\n" .
4380               "</div>\n";
4381 }
4382
4383 # returns a submenu for the navigation of the refs views (tags, heads,
4384 # remotes) with the current view disabled and the remotes view only
4385 # available if the feature is enabled
4386 sub format_ref_views {
4387         my ($current) = @_;
4388         my @ref_views = qw{tags heads};
4389         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4390         return join " | ", map {
4391                 $_ eq $current ? $_ :
4392                 $cgi->a({-href => href(action=>$_)}, $_)
4393         } @ref_views
4394 }
4395
4396 sub format_paging_nav {
4397         my ($action, $page, $has_next_link) = @_;
4398         my $paging_nav;
4399
4400
4401         if ($page > 0) {
4402                 $paging_nav .=
4403                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4404                         " &sdot; " .
4405                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4406                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4407         } else {
4408                 $paging_nav .= "first &sdot; prev";
4409         }
4410
4411         if ($has_next_link) {
4412                 $paging_nav .= " &sdot; " .
4413                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4414                                  -accesskey => "n", -title => "Alt-n"}, "next");
4415         } else {
4416                 $paging_nav .= " &sdot; next";
4417         }
4418
4419         return $paging_nav;
4420 }
4421
4422 ## ......................................................................
4423 ## functions printing or outputting HTML: div
4424
4425 sub git_print_header_div {
4426         my ($action, $title, $hash, $hash_base) = @_;
4427         my %args = ();
4428
4429         $args{'action'} = $action;
4430         $args{'hash'} = $hash if $hash;
4431         $args{'hash_base'} = $hash_base if $hash_base;
4432
4433         print "<div class=\"header\">\n" .
4434               $cgi->a({-href => href(%args), -class => "title"},
4435               $title ? $title : $action) .
4436               "\n</div>\n";
4437 }
4438
4439 sub format_repo_url {
4440         my ($name, $url) = @_;
4441         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4442 }
4443
4444 # Group output by placing it in a DIV element and adding a header.
4445 # Options for start_div() can be provided by passing a hash reference as the
4446 # first parameter to the function.
4447 # Options to git_print_header_div() can be provided by passing an array
4448 # reference. This must follow the options to start_div if they are present.
4449 # The content can be a scalar, which is output as-is, a scalar reference, which
4450 # is output after html escaping, an IO handle passed either as *handle or
4451 # *handle{IO}, or a function reference. In the latter case all following
4452 # parameters will be taken as argument to the content function call.
4453 sub git_print_section {
4454         my ($div_args, $header_args, $content);
4455         my $arg = shift;
4456         if (ref($arg) eq 'HASH') {
4457                 $div_args = $arg;
4458                 $arg = shift;
4459         }
4460         if (ref($arg) eq 'ARRAY') {
4461                 $header_args = $arg;
4462                 $arg = shift;
4463         }
4464         $content = $arg;
4465
4466         print $cgi->start_div($div_args);
4467         git_print_header_div(@$header_args);
4468
4469         if (ref($content) eq 'CODE') {
4470                 $content->(@_);
4471         } elsif (ref($content) eq 'SCALAR') {
4472                 print esc_html($$content);
4473         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4474                 print <$content>;
4475         } elsif (!ref($content) && defined($content)) {
4476                 print $content;
4477         }
4478
4479         print $cgi->end_div;
4480 }
4481
4482 sub format_timestamp_html {
4483         my $date = shift;
4484         my $strtime = $date->{'rfc2822'};
4485
4486         my (undef, undef, $datetime_class) =
4487                 gitweb_get_feature('javascript-timezone');
4488         if ($datetime_class) {
4489                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4490         }
4491
4492         my $localtime_format = '(%02d:%02d %s)';
4493         if ($date->{'hour_local'} < 6) {
4494                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4495         }
4496         $strtime .= ' ' .
4497                     sprintf($localtime_format,
4498                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4499
4500         return $strtime;
4501 }
4502
4503 # Outputs the author name and date in long form
4504 sub git_print_authorship {
4505         my $co = shift;
4506         my %opts = @_;
4507         my $tag = $opts{-tag} || 'div';
4508         my $author = $co->{'author_name'};
4509
4510         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4511         print "<$tag class=\"author_date\">" .
4512               format_search_author($author, "author", esc_html($author)) .
4513               " [".format_timestamp_html(\%ad)."]".
4514               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4515               "</$tag>\n";
4516 }
4517
4518 # Outputs table rows containing the full author or committer information,
4519 # in the format expected for 'commit' view (& similar).
4520 # Parameters are a commit hash reference, followed by the list of people
4521 # to output information for. If the list is empty it defaults to both
4522 # author and committer.
4523 sub git_print_authorship_rows {
4524         my $co = shift;
4525         # too bad we can't use @people = @_ || ('author', 'committer')
4526         my @people = @_;
4527         @people = ('author', 'committer') unless @people;
4528         foreach my $who (@people) {
4529                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4530                 print "<tr><td>$who</td><td>" .
4531                       format_search_author($co->{"${who}_name"}, $who,
4532                                            esc_html($co->{"${who}_name"})) . " " .
4533                       format_search_author($co->{"${who}_email"}, $who,
4534                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4535                       "</td><td rowspan=\"2\">" .
4536                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4537                       "</td></tr>\n" .
4538                       "<tr>" .
4539                       "<td></td><td>" .
4540                       format_timestamp_html(\%wd) .
4541                       "</td>" .
4542                       "</tr>\n";
4543         }
4544 }
4545
4546 sub git_print_page_path {
4547         my $name = shift;
4548         my $type = shift;
4549         my $hb = shift;
4550
4551
4552         print "<div class=\"page_path\">";
4553         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4554                       -title => 'tree root'}, to_utf8("[$project]"));
4555         print " / ";
4556         if (defined $name) {
4557                 my @dirname = split '/', $name;
4558                 my $basename = pop @dirname;
4559                 my $fullname = '';
4560
4561                 foreach my $dir (@dirname) {
4562                         $fullname .= ($fullname ? '/' : '') . $dir;
4563                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4564                                                      hash_base=>$hb),
4565                                       -title => $fullname}, esc_path($dir));
4566                         print " / ";
4567                 }
4568                 if (defined $type && $type eq 'blob') {
4569                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4570                                                      hash_base=>$hb),
4571                                       -title => $name}, esc_path($basename));
4572                 } elsif (defined $type && $type eq 'tree') {
4573                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4574                                                      hash_base=>$hb),
4575                                       -title => $name}, esc_path($basename));
4576                         print " / ";
4577                 } else {
4578                         print esc_path($basename);
4579                 }
4580         }
4581         print "<br/></div>\n";
4582 }
4583
4584 sub git_print_log {
4585         my $log = shift;
4586         my %opts = @_;
4587
4588         if ($opts{'-remove_title'}) {
4589                 # remove title, i.e. first line of log
4590                 shift @$log;
4591         }
4592         # remove leading empty lines
4593         while (defined $log->[0] && $log->[0] eq "") {
4594                 shift @$log;
4595         }
4596
4597         # print log
4598         my $skip_blank_line = 0;
4599         foreach my $line (@$log) {
4600                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4601                         if (! $opts{'-remove_signoff'}) {
4602                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4603                                 $skip_blank_line = 1;
4604                         }
4605                         next;
4606                 }
4607
4608                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4609                         if (! $opts{'-remove_signoff'}) {
4610                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4611                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4612                                         "</span><br/>\n";
4613                                 $skip_blank_line = 1;
4614                         }
4615                         next;
4616                 }
4617
4618                 # print only one empty line
4619                 # do not print empty line after signoff
4620                 if ($line eq "") {
4621                         next if ($skip_blank_line);
4622                         $skip_blank_line = 1;
4623                 } else {
4624                         $skip_blank_line = 0;
4625                 }
4626
4627                 print format_log_line_html($line) . "<br/>\n";
4628         }
4629
4630         if ($opts{'-final_empty_line'}) {
4631                 # end with single empty line
4632                 print "<br/>\n" unless $skip_blank_line;
4633         }
4634 }
4635
4636 # return link target (what link points to)
4637 sub git_get_link_target {
4638         my $hash = shift;
4639         my $link_target;
4640
4641         # read link
4642         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4643                 or return;
4644         {
4645                 local $/ = undef;
4646                 $link_target = <$fd>;
4647         }
4648         close $fd
4649                 or return;
4650
4651         return $link_target;
4652 }
4653
4654 # given link target, and the directory (basedir) the link is in,
4655 # return target of link relative to top directory (top tree);
4656 # return undef if it is not possible (including absolute links).
4657 sub normalize_link_target {
4658         my ($link_target, $basedir) = @_;
4659
4660         # absolute symlinks (beginning with '/') cannot be normalized
4661         return if (substr($link_target, 0, 1) eq '/');
4662
4663         # normalize link target to path from top (root) tree (dir)
4664         my $path;
4665         if ($basedir) {
4666                 $path = $basedir . '/' . $link_target;
4667         } else {
4668                 # we are in top (root) tree (dir)
4669                 $path = $link_target;
4670         }
4671
4672         # remove //, /./, and /../
4673         my @path_parts;
4674         foreach my $part (split('/', $path)) {
4675                 # discard '.' and ''
4676                 next if (!$part || $part eq '.');
4677                 # handle '..'
4678                 if ($part eq '..') {
4679                         if (@path_parts) {
4680                                 pop @path_parts;
4681                         } else {
4682                                 # link leads outside repository (outside top dir)
4683                                 return;
4684                         }
4685                 } else {
4686                         push @path_parts, $part;
4687                 }
4688         }
4689         $path = join('/', @path_parts);
4690
4691         return $path;
4692 }
4693
4694 # print tree entry (row of git_tree), but without encompassing <tr> element
4695 sub git_print_tree_entry {
4696         my ($t, $basedir, $hash_base, $have_blame) = @_;
4697
4698         my %base_key = ();
4699         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4700
4701         # The format of a table row is: mode list link.  Where mode is
4702         # the mode of the entry, list is the name of the entry, an href,
4703         # and link is the action links of the entry.
4704
4705         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4706         if (exists $t->{'size'}) {
4707                 print "<td class=\"size\">$t->{'size'}</td>\n";
4708         }
4709         if ($t->{'type'} eq "blob") {
4710                 print "<td class=\"list\">" .
4711                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4712                                                file_name=>"$basedir$t->{'name'}", %base_key),
4713                                 -class => "list"}, esc_path($t->{'name'}));
4714                 if (S_ISLNK(oct $t->{'mode'})) {
4715                         my $link_target = git_get_link_target($t->{'hash'});
4716                         if ($link_target) {
4717                                 my $norm_target = normalize_link_target($link_target, $basedir);
4718                                 if (defined $norm_target) {
4719                                         print " -> " .
4720                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4721                                                                      file_name=>$norm_target),
4722                                                        -title => $norm_target}, esc_path($link_target));
4723                                 } else {
4724                                         print " -> " . esc_path($link_target);
4725                                 }
4726                         }
4727                 }
4728                 print "</td>\n";
4729                 print "<td class=\"link\">";
4730                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4731                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4732                               "blob");
4733                 if ($have_blame) {
4734                         print " | " .
4735                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4736                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4737                                       "blame");
4738                 }
4739                 if (defined $hash_base) {
4740                         print " | " .
4741                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4742                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4743                                       "history");
4744                 }
4745                 print " | " .
4746                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4747                                                file_name=>"$basedir$t->{'name'}")},
4748                                 "raw");
4749                 print "</td>\n";
4750
4751         } elsif ($t->{'type'} eq "tree") {
4752                 print "<td class=\"list\">";
4753                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4754                                              file_name=>"$basedir$t->{'name'}",
4755                                              %base_key)},
4756                               esc_path($t->{'name'}));
4757                 print "</td>\n";
4758                 print "<td class=\"link\">";
4759                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4760                                              file_name=>"$basedir$t->{'name'}",
4761                                              %base_key)},
4762                               "tree");
4763                 if (defined $hash_base) {
4764                         print " | " .
4765                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4766                                                      file_name=>"$basedir$t->{'name'}")},
4767                                       "history");
4768                 }
4769                 print "</td>\n";
4770         } else {
4771                 # unknown object: we can only present history for it
4772                 # (this includes 'commit' object, i.e. submodule support)
4773                 print "<td class=\"list\">" .
4774                       esc_path($t->{'name'}) .
4775                       "</td>\n";
4776                 print "<td class=\"link\">";
4777                 if (defined $hash_base) {
4778                         print $cgi->a({-href => href(action=>"history",
4779                                                      hash_base=>$hash_base,
4780                                                      file_name=>"$basedir$t->{'name'}")},
4781                                       "history");
4782                 }
4783                 print "</td>\n";
4784         }
4785 }
4786
4787 ## ......................................................................
4788 ## functions printing large fragments of HTML
4789
4790 # get pre-image filenames for merge (combined) diff
4791 sub fill_from_file_info {
4792         my ($diff, @parents) = @_;
4793
4794         $diff->{'from_file'} = [ ];
4795         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4796         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4797                 if ($diff->{'status'}[$i] eq 'R' ||
4798                     $diff->{'status'}[$i] eq 'C') {
4799                         $diff->{'from_file'}[$i] =
4800                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4801                 }
4802         }
4803
4804         return $diff;
4805 }
4806
4807 # is current raw difftree line of file deletion
4808 sub is_deleted {
4809         my $diffinfo = shift;
4810
4811         return $diffinfo->{'to_id'} eq ('0' x 40);
4812 }
4813
4814 # does patch correspond to [previous] difftree raw line
4815 # $diffinfo  - hashref of parsed raw diff format
4816 # $patchinfo - hashref of parsed patch diff format
4817 #              (the same keys as in $diffinfo)
4818 sub is_patch_split {
4819         my ($diffinfo, $patchinfo) = @_;
4820
4821         return defined $diffinfo && defined $patchinfo
4822                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4823 }
4824
4825
4826 sub git_difftree_body {
4827         my ($difftree, $hash, @parents) = @_;
4828         my ($parent) = $parents[0];
4829         my $have_blame = gitweb_check_feature('blame');
4830         print "<div class=\"list_head\">\n";
4831         if ($#{$difftree} > 10) {
4832                 print(($#{$difftree} + 1) . " files changed:\n");
4833         }
4834         print "</div>\n";
4835
4836         print "<table class=\"" .
4837               (@parents > 1 ? "combined " : "") .
4838               "diff_tree\">\n";
4839
4840         # header only for combined diff in 'commitdiff' view
4841         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4842         if ($has_header) {
4843                 # table header
4844                 print "<thead><tr>\n" .
4845                        "<th></th><th></th>\n"; # filename, patchN link
4846                 for (my $i = 0; $i < @parents; $i++) {
4847                         my $par = $parents[$i];
4848                         print "<th>" .
4849                               $cgi->a({-href => href(action=>"commitdiff",
4850                                                      hash=>$hash, hash_parent=>$par),
4851                                        -title => 'commitdiff to parent number ' .
4852                                                   ($i+1) . ': ' . substr($par,0,7)},
4853                                       $i+1) .
4854                               "&nbsp;</th>\n";
4855                 }
4856                 print "</tr></thead>\n<tbody>\n";
4857         }
4858
4859         my $alternate = 1;
4860         my $patchno = 0;
4861         foreach my $line (@{$difftree}) {
4862                 my $diff = parsed_difftree_line($line);
4863
4864                 if ($alternate) {
4865                         print "<tr class=\"dark\">\n";
4866                 } else {
4867                         print "<tr class=\"light\">\n";
4868                 }
4869                 $alternate ^= 1;
4870
4871                 if (exists $diff->{'nparents'}) { # combined diff
4872
4873                         fill_from_file_info($diff, @parents)
4874                                 unless exists $diff->{'from_file'};
4875
4876                         if (!is_deleted($diff)) {
4877                                 # file exists in the result (child) commit
4878                                 print "<td>" .
4879                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4880                                                              file_name=>$diff->{'to_file'},
4881                                                              hash_base=>$hash),
4882                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4883                                       "</td>\n";
4884                         } else {
4885                                 print "<td>" .
4886                                       esc_path($diff->{'to_file'}) .
4887                                       "</td>\n";
4888                         }
4889
4890                         if ($action eq 'commitdiff') {
4891                                 # link to patch
4892                                 $patchno++;
4893                                 print "<td class=\"link\">" .
4894                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4895                                               "patch") .
4896                                       " | " .
4897                                       "</td>\n";
4898                         }
4899
4900                         my $has_history = 0;
4901                         my $not_deleted = 0;
4902                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4903                                 my $hash_parent = $parents[$i];
4904                                 my $from_hash = $diff->{'from_id'}[$i];
4905                                 my $from_path = $diff->{'from_file'}[$i];
4906                                 my $status = $diff->{'status'}[$i];
4907
4908                                 $has_history ||= ($status ne 'A');
4909                                 $not_deleted ||= ($status ne 'D');
4910
4911                                 if ($status eq 'A') {
4912                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4913                                 } elsif ($status eq 'D') {
4914                                         print "<td class=\"link\">" .
4915                                               $cgi->a({-href => href(action=>"blob",
4916                                                                      hash_base=>$hash,
4917                                                                      hash=>$from_hash,
4918                                                                      file_name=>$from_path)},
4919                                                       "blob" . ($i+1)) .
4920                                               " | </td>\n";
4921                                 } else {
4922                                         if ($diff->{'to_id'} eq $from_hash) {
4923                                                 print "<td class=\"link nochange\">";
4924                                         } else {
4925                                                 print "<td class=\"link\">";
4926                                         }
4927                                         print $cgi->a({-href => href(action=>"blobdiff",
4928                                                                      hash=>$diff->{'to_id'},
4929                                                                      hash_parent=>$from_hash,
4930                                                                      hash_base=>$hash,
4931                                                                      hash_parent_base=>$hash_parent,
4932                                                                      file_name=>$diff->{'to_file'},
4933                                                                      file_parent=>$from_path)},
4934                                                       "diff" . ($i+1)) .
4935                                               " | </td>\n";
4936                                 }
4937                         }
4938
4939                         print "<td class=\"link\">";
4940                         if ($not_deleted) {
4941                                 print $cgi->a({-href => href(action=>"blob",
4942                                                              hash=>$diff->{'to_id'},
4943                                                              file_name=>$diff->{'to_file'},
4944                                                              hash_base=>$hash)},
4945                                               "blob");
4946                                 print " | " if ($has_history);
4947                         }
4948                         if ($has_history) {
4949                                 print $cgi->a({-href => href(action=>"history",
4950                                                              file_name=>$diff->{'to_file'},
4951                                                              hash_base=>$hash)},
4952                                               "history");
4953                         }
4954                         print "</td>\n";
4955
4956                         print "</tr>\n";
4957                         next; # instead of 'else' clause, to avoid extra indent
4958                 }
4959                 # else ordinary diff
4960
4961                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4962                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4963                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4964                         $to_mode_oct = oct $diff->{'to_mode'};
4965                         if (S_ISREG($to_mode_oct)) { # only for regular file
4966                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4967                         }
4968                         $to_file_type = file_type($diff->{'to_mode'});
4969                 }
4970                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4971                         $from_mode_oct = oct $diff->{'from_mode'};
4972                         if (S_ISREG($from_mode_oct)) { # only for regular file
4973                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4974                         }
4975                         $from_file_type = file_type($diff->{'from_mode'});
4976                 }
4977
4978                 if ($diff->{'status'} eq "A") { # created
4979                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4980                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4981                         $mode_chng   .= "]</span>";
4982                         print "<td>";
4983                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4984                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4985                                       -class => "list"}, esc_path($diff->{'file'}));
4986                         print "</td>\n";
4987                         print "<td>$mode_chng</td>\n";
4988                         print "<td class=\"link\">";
4989                         if ($action eq 'commitdiff') {
4990                                 # link to patch
4991                                 $patchno++;
4992                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4993                                               "patch") .
4994                                       " | ";
4995                         }
4996                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4997                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4998                                       "blob");
4999                         print "</td>\n";
5000
5001                 } elsif ($diff->{'status'} eq "D") { # deleted
5002                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5003                         print "<td>";
5004                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5005                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5006                                        -class => "list"}, esc_path($diff->{'file'}));
5007                         print "</td>\n";
5008                         print "<td>$mode_chng</td>\n";
5009                         print "<td class=\"link\">";
5010                         if ($action eq 'commitdiff') {
5011                                 # link to patch
5012                                 $patchno++;
5013                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5014                                               "patch") .
5015                                       " | ";
5016                         }
5017                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5018                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5019                                       "blob") . " | ";
5020                         if ($have_blame) {
5021                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5022                                                              file_name=>$diff->{'file'})},
5023                                               "blame") . " | ";
5024                         }
5025                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5026                                                      file_name=>$diff->{'file'})},
5027                                       "history");
5028                         print "</td>\n";
5029
5030                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5031                         my $mode_chnge = "";
5032                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5033                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5034                                 if ($from_file_type ne $to_file_type) {
5035                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5036                                 }
5037                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5038                                         if ($from_mode_str && $to_mode_str) {
5039                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5040                                         } elsif ($to_mode_str) {
5041                                                 $mode_chnge .= " mode: $to_mode_str";
5042                                         }
5043                                 }
5044                                 $mode_chnge .= "]</span>\n";
5045                         }
5046                         print "<td>";
5047                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5048                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5049                                       -class => "list"}, esc_path($diff->{'file'}));
5050                         print "</td>\n";
5051                         print "<td>$mode_chnge</td>\n";
5052                         print "<td class=\"link\">";
5053                         if ($action eq 'commitdiff') {
5054                                 # link to patch
5055                                 $patchno++;
5056                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5057                                               "patch") .
5058                                       " | ";
5059                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5060                                 # "commit" view and modified file (not onlu mode changed)
5061                                 print $cgi->a({-href => href(action=>"blobdiff",
5062                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5063                                                              hash_base=>$hash, hash_parent_base=>$parent,
5064                                                              file_name=>$diff->{'file'})},
5065                                               "diff") .
5066                                       " | ";
5067                         }
5068                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5069                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5070                                        "blob") . " | ";
5071                         if ($have_blame) {
5072                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5073                                                              file_name=>$diff->{'file'})},
5074                                               "blame") . " | ";
5075                         }
5076                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5077                                                      file_name=>$diff->{'file'})},
5078                                       "history");
5079                         print "</td>\n";
5080
5081                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5082                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5083                         my $nstatus = $status_name{$diff->{'status'}};
5084                         my $mode_chng = "";
5085                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5086                                 # mode also for directories, so we cannot use $to_mode_str
5087                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5088                         }
5089                         print "<td>" .
5090                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5091                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5092                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5093                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5094                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5095                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5096                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5097                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5098                               "<td class=\"link\">";
5099                         if ($action eq 'commitdiff') {
5100                                 # link to patch
5101                                 $patchno++;
5102                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5103                                               "patch") .
5104                                       " | ";
5105                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5106                                 # "commit" view and modified file (not only pure rename or copy)
5107                                 print $cgi->a({-href => href(action=>"blobdiff",
5108                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5109                                                              hash_base=>$hash, hash_parent_base=>$parent,
5110                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5111                                               "diff") .
5112                                       " | ";
5113                         }
5114                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5115                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5116                                       "blob") . " | ";
5117                         if ($have_blame) {
5118                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5119                                                              file_name=>$diff->{'to_file'})},
5120                                               "blame") . " | ";
5121                         }
5122                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5123                                                     file_name=>$diff->{'to_file'})},
5124                                       "history");
5125                         print "</td>\n";
5126
5127                 } # we should not encounter Unmerged (U) or Unknown (X) status
5128                 print "</tr>\n";
5129         }
5130         print "</tbody>" if $has_header;
5131         print "</table>\n";
5132 }
5133
5134 # Print context lines and then rem/add lines in a side-by-side manner.
5135 sub print_sidebyside_diff_lines {
5136         my ($ctx, $rem, $add) = @_;
5137
5138         # print context block before add/rem block
5139         if (@$ctx) {
5140                 print join '',
5141                         '<div class="chunk_block ctx">',
5142                                 '<div class="old">',
5143                                 @$ctx,
5144                                 '</div>',
5145                                 '<div class="new">',
5146                                 @$ctx,
5147                                 '</div>',
5148                         '</div>';
5149         }
5150
5151         if (!@$add) {
5152                 # pure removal
5153                 print join '',
5154                         '<div class="chunk_block rem">',
5155                                 '<div class="old">',
5156                                 @$rem,
5157                                 '</div>',
5158                         '</div>';
5159         } elsif (!@$rem) {
5160                 # pure addition
5161                 print join '',
5162                         '<div class="chunk_block add">',
5163                                 '<div class="new">',
5164                                 @$add,
5165                                 '</div>',
5166                         '</div>';
5167         } else {
5168                 print join '',
5169                         '<div class="chunk_block chg">',
5170                                 '<div class="old">',
5171                                 @$rem,
5172                                 '</div>',
5173                                 '<div class="new">',
5174                                 @$add,
5175                                 '</div>',
5176                         '</div>';
5177         }
5178 }
5179
5180 # Print context lines and then rem/add lines in inline manner.
5181 sub print_inline_diff_lines {
5182         my ($ctx, $rem, $add) = @_;
5183
5184         print @$ctx, @$rem, @$add;
5185 }
5186
5187 # Format removed and added line, mark changed part and HTML-format them.
5188 # Implementation is based on contrib/diff-highlight
5189 sub format_rem_add_lines_pair {
5190         my ($rem, $add, $num_parents) = @_;
5191
5192         # We need to untabify lines before split()'ing them;
5193         # otherwise offsets would be invalid.
5194         chomp $rem;
5195         chomp $add;
5196         $rem = untabify($rem);
5197         $add = untabify($add);
5198
5199         my @rem = split(//, $rem);
5200         my @add = split(//, $add);
5201         my ($esc_rem, $esc_add);
5202         # Ignore leading +/- characters for each parent.
5203         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5204         my ($prefix_has_nonspace, $suffix_has_nonspace);
5205
5206         my $shorter = (@rem < @add) ? @rem : @add;
5207         while ($prefix_len < $shorter) {
5208                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5209
5210                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5211                 $prefix_len++;
5212         }
5213
5214         while ($prefix_len + $suffix_len < $shorter) {
5215                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5216
5217                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5218                 $suffix_len++;
5219         }
5220
5221         # Mark lines that are different from each other, but have some common
5222         # part that isn't whitespace.  If lines are completely different, don't
5223         # mark them because that would make output unreadable, especially if
5224         # diff consists of multiple lines.
5225         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5226                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5227                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5228                 $esc_add = esc_html_hl_regions($add, 'marked',
5229                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5230         } else {
5231                 $esc_rem = esc_html($rem, -nbsp=>1);
5232                 $esc_add = esc_html($add, -nbsp=>1);
5233         }
5234
5235         return format_diff_line(\$esc_rem, 'rem'),
5236                format_diff_line(\$esc_add, 'add');
5237 }
5238
5239 # HTML-format diff context, removed and added lines.
5240 sub format_ctx_rem_add_lines {
5241         my ($ctx, $rem, $add, $num_parents) = @_;
5242         my (@new_ctx, @new_rem, @new_add);
5243         my $can_highlight = 0;
5244         my $is_combined = ($num_parents > 1);
5245
5246         # Highlight if every removed line has a corresponding added line.
5247         if (@$add > 0 && @$add == @$rem) {
5248                 $can_highlight = 1;
5249
5250                 # Highlight lines in combined diff only if the chunk contains
5251                 # diff between the same version, e.g.
5252                 #
5253                 #    - a
5254                 #   -  b
5255                 #    + c
5256                 #   +  d
5257                 #
5258                 # Otherwise the highlightling would be confusing.
5259                 if ($is_combined) {
5260                         for (my $i = 0; $i < @$add; $i++) {
5261                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5262                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5263
5264                                 $prefix_rem =~ s/-/+/g;
5265
5266                                 if ($prefix_rem ne $prefix_add) {
5267                                         $can_highlight = 0;
5268                                         last;
5269                                 }
5270                         }
5271                 }
5272         }
5273
5274         if ($can_highlight) {
5275                 for (my $i = 0; $i < @$add; $i++) {
5276                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5277                                 $rem->[$i], $add->[$i], $num_parents);
5278                         push @new_rem, $line_rem;
5279                         push @new_add, $line_add;
5280                 }
5281         } else {
5282                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5283                 @new_add = map { format_diff_line($_, 'add') } @$add;
5284         }
5285
5286         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5287
5288         return (\@new_ctx, \@new_rem, \@new_add);
5289 }
5290
5291 # Print context lines and then rem/add lines.
5292 sub print_diff_lines {
5293         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5294         my $is_combined = $num_parents > 1;
5295
5296         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5297                 $num_parents);
5298
5299         if ($diff_style eq 'sidebyside' && !$is_combined) {
5300                 print_sidebyside_diff_lines($ctx, $rem, $add);
5301         } else {
5302                 # default 'inline' style and unknown styles
5303                 print_inline_diff_lines($ctx, $rem, $add);
5304         }
5305 }
5306
5307 sub print_diff_chunk {
5308         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5309         my (@ctx, @rem, @add);
5310
5311         # The class of the previous line.
5312         my $prev_class = '';
5313
5314         return unless @chunk;
5315
5316         # incomplete last line might be among removed or added lines,
5317         # or both, or among context lines: find which
5318         for (my $i = 1; $i < @chunk; $i++) {
5319                 if ($chunk[$i][0] eq 'incomplete') {
5320                         $chunk[$i][0] = $chunk[$i-1][0];
5321                 }
5322         }
5323
5324         # guardian
5325         push @chunk, ["", ""];
5326
5327         foreach my $line_info (@chunk) {
5328                 my ($class, $line) = @$line_info;
5329
5330                 # print chunk headers
5331                 if ($class && $class eq 'chunk_header') {
5332                         print format_diff_line($line, $class, $from, $to);
5333                         next;
5334                 }
5335
5336                 ## print from accumulator when have some add/rem lines or end
5337                 # of chunk (flush context lines), or when have add and rem
5338                 # lines and new block is reached (otherwise add/rem lines could
5339                 # be reordered)
5340                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5341                     (@rem && @add && $class ne $prev_class)) {
5342                         print_diff_lines(\@ctx, \@rem, \@add,
5343                                          $diff_style, $num_parents);
5344                         @ctx = @rem = @add = ();
5345                 }
5346
5347                 ## adding lines to accumulator
5348                 # guardian value
5349                 last unless $line;
5350                 # rem, add or change
5351                 if ($class eq 'rem') {
5352                         push @rem, $line;
5353                 } elsif ($class eq 'add') {
5354                         push @add, $line;
5355                 }
5356                 # context line
5357                 if ($class eq 'ctx') {
5358                         push @ctx, $line;
5359                 }
5360
5361                 $prev_class = $class;
5362         }
5363 }
5364
5365 sub git_patchset_body {
5366         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5367         my ($hash_parent) = $hash_parents[0];
5368
5369         my $is_combined = (@hash_parents > 1);
5370         my $patch_idx = 0;
5371         my $patch_number = 0;
5372         my $patch_line;
5373         my $diffinfo;
5374         my $to_name;
5375         my (%from, %to);
5376         my @chunk; # for side-by-side diff
5377
5378         print "<div class=\"patchset\">\n";
5379
5380         # skip to first patch
5381         while ($patch_line = <$fd>) {
5382                 chomp $patch_line;
5383
5384                 last if ($patch_line =~ m/^diff /);
5385         }
5386
5387  PATCH:
5388         while ($patch_line) {
5389
5390                 # parse "git diff" header line
5391                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5392                         # $1 is from_name, which we do not use
5393                         $to_name = unquote($2);
5394                         $to_name =~ s!^b/!!;
5395                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5396                         # $1 is 'cc' or 'combined', which we do not use
5397                         $to_name = unquote($2);
5398                 } else {
5399                         $to_name = undef;
5400                 }
5401
5402                 # check if current patch belong to current raw line
5403                 # and parse raw git-diff line if needed
5404                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5405                         # this is continuation of a split patch
5406                         print "<div class=\"patch cont\">\n";
5407                 } else {
5408                         # advance raw git-diff output if needed
5409                         $patch_idx++ if defined $diffinfo;
5410
5411                         # read and prepare patch information
5412                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5413
5414                         # compact combined diff output can have some patches skipped
5415                         # find which patch (using pathname of result) we are at now;
5416                         if ($is_combined) {
5417                                 while ($to_name ne $diffinfo->{'to_file'}) {
5418                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5419                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5420                                               "</div>\n";  # class="patch"
5421
5422                                         $patch_idx++;
5423                                         $patch_number++;
5424
5425                                         last if $patch_idx > $#$difftree;
5426                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5427                                 }
5428                         }
5429
5430                         # modifies %from, %to hashes
5431                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5432
5433                         # this is first patch for raw difftree line with $patch_idx index
5434                         # we index @$difftree array from 0, but number patches from 1
5435                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5436                 }
5437
5438                 # git diff header
5439                 #assert($patch_line =~ m/^diff /) if DEBUG;
5440                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5441                 $patch_number++;
5442                 # print "git diff" header
5443                 print format_git_diff_header_line($patch_line, $diffinfo,
5444                                                   \%from, \%to);
5445
5446                 # print extended diff header
5447                 print "<div class=\"diff extended_header\">\n";
5448         EXTENDED_HEADER:
5449                 while ($patch_line = <$fd>) {
5450                         chomp $patch_line;
5451
5452                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5453
5454                         print format_extended_diff_header_line($patch_line, $diffinfo,
5455                                                                \%from, \%to);
5456                 }
5457                 print "</div>\n"; # class="diff extended_header"
5458
5459                 # from-file/to-file diff header
5460                 if (! $patch_line) {
5461                         print "</div>\n"; # class="patch"
5462                         last PATCH;
5463                 }
5464                 next PATCH if ($patch_line =~ m/^diff /);
5465                 #assert($patch_line =~ m/^---/) if DEBUG;
5466
5467                 my $last_patch_line = $patch_line;
5468                 $patch_line = <$fd>;
5469                 chomp $patch_line;
5470                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5471
5472                 print format_diff_from_to_header($last_patch_line, $patch_line,
5473                                                  $diffinfo, \%from, \%to,
5474                                                  @hash_parents);
5475
5476                 # the patch itself
5477         LINE:
5478                 while ($patch_line = <$fd>) {
5479                         chomp $patch_line;
5480
5481                         next PATCH if ($patch_line =~ m/^diff /);
5482
5483                         my $class = diff_line_class($patch_line, \%from, \%to);
5484
5485                         if ($class eq 'chunk_header') {
5486                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5487                                 @chunk = ();
5488                         }
5489
5490                         push @chunk, [ $class, $patch_line ];
5491                 }
5492
5493         } continue {
5494                 if (@chunk) {
5495                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5496                         @chunk = ();
5497                 }
5498                 print "</div>\n"; # class="patch"
5499         }
5500
5501         # for compact combined (--cc) format, with chunk and patch simplification
5502         # the patchset might be empty, but there might be unprocessed raw lines
5503         for (++$patch_idx if $patch_number > 0;
5504              $patch_idx < @$difftree;
5505              ++$patch_idx) {
5506                 # read and prepare patch information
5507                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5508
5509                 # generate anchor for "patch" links in difftree / whatchanged part
5510                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5511                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5512                       "</div>\n";  # class="patch"
5513
5514                 $patch_number++;
5515         }
5516
5517         if ($patch_number == 0) {
5518                 if (@hash_parents > 1) {
5519                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5520                 } else {
5521                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5522                 }
5523         }
5524
5525         print "</div>\n"; # class="patchset"
5526 }
5527
5528 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5529
5530 sub git_project_search_form {
5531         my ($searchtext, $search_use_regexp) = @_;
5532
5533         my $limit = '';
5534         if ($project_filter) {
5535                 $limit = " in '$project_filter/'";
5536         }
5537
5538         print "<div class=\"projsearch\">\n";
5539         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5540               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5541         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5542                 if (defined $project_filter);
5543         print $cgi->textfield(-name => 's', -value => $searchtext,
5544                               -title => "Search project by name and description$limit",
5545                               -size => 60) . "\n" .
5546               "<span title=\"Extended regular expression\">" .
5547               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5548                              -checked => $search_use_regexp) .
5549               "</span>\n" .
5550               $cgi->submit(-name => 'btnS', -value => 'Search') .
5551               $cgi->end_form() . "\n" .
5552               $cgi->a({-href => href(project => undef, searchtext => undef,
5553                                      project_filter => $project_filter)},
5554                       esc_html("List all projects$limit")) . "<br />\n";
5555         print "</div>\n";
5556 }
5557
5558 # entry for given @keys needs filling if at least one of keys in list
5559 # is not present in %$project_info
5560 sub project_info_needs_filling {
5561         my ($project_info, @keys) = @_;
5562
5563         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5564         foreach my $key (@keys) {
5565                 if (!exists $project_info->{$key}) {
5566                         return 1;
5567                 }
5568         }
5569         return;
5570 }
5571
5572 # fills project list info (age, description, owner, category, forks, etc.)
5573 # for each project in the list, removing invalid projects from
5574 # returned list, or fill only specified info.
5575 #
5576 # Invalid projects are removed from the returned list if and only if you
5577 # ask 'age' or 'age_string' to be filled, because they are the only fields
5578 # that run unconditionally git command that requires repository, and
5579 # therefore do always check if project repository is invalid.
5580 #
5581 # USAGE:
5582 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5583 #   ensures that 'descr_long' and 'ctags' fields are filled
5584 # * @project_list = fill_project_list_info(\@project_list)
5585 #   ensures that all fields are filled (and invalid projects removed)
5586 #
5587 # NOTE: modifies $projlist, but does not remove entries from it
5588 sub fill_project_list_info {
5589         my ($projlist, @wanted_keys) = @_;
5590         my @projects;
5591         my $filter_set = sub { return @_; };
5592         if (@wanted_keys) {
5593                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5594                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5595         }
5596
5597         my $show_ctags = gitweb_check_feature('ctags');
5598  PROJECT:
5599         foreach my $pr (@$projlist) {
5600                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5601                         my (@activity) = git_get_last_activity($pr->{'path'});
5602                         unless (@activity) {
5603                                 next PROJECT;
5604                         }
5605                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5606                 }
5607                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5608                         my $descr = git_get_project_description($pr->{'path'}) || "";
5609                         $descr = to_utf8($descr);
5610                         $pr->{'descr_long'} = $descr;
5611                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5612                 }
5613                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5614                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5615                 }
5616                 if ($show_ctags &&
5617                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5618                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5619                 }
5620                 if ($projects_list_group_categories &&
5621                     project_info_needs_filling($pr, $filter_set->('category'))) {
5622                         my $cat = git_get_project_category($pr->{'path'}) ||
5623                                                            $project_list_default_category;
5624                         $pr->{'category'} = to_utf8($cat);
5625                 }
5626
5627                 push @projects, $pr;
5628         }
5629
5630         return @projects;
5631 }
5632
5633 sub sort_projects_list {
5634         my ($projlist, $order) = @_;
5635
5636         sub order_str {
5637                 my $key = shift;
5638                 return sub { $a->{$key} cmp $b->{$key} };
5639         }
5640
5641         sub order_num_then_undef {
5642                 my $key = shift;
5643                 return sub {
5644                         defined $a->{$key} ?
5645                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5646                                 (defined $b->{$key} ? 1 : 0)
5647                 };
5648         }
5649
5650         my %orderings = (
5651                 project => order_str('path'),
5652                 descr => order_str('descr_long'),
5653                 owner => order_str('owner'),
5654                 age => order_num_then_undef('age'),
5655         );
5656
5657         my $ordering = $orderings{$order};
5658         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5659 }
5660
5661 # returns a hash of categories, containing the list of project
5662 # belonging to each category
5663 sub build_projlist_by_category {
5664         my ($projlist, $from, $to) = @_;
5665         my %categories;
5666
5667         $from = 0 unless defined $from;
5668         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5669
5670         for (my $i = $from; $i <= $to; $i++) {
5671                 my $pr = $projlist->[$i];
5672                 push @{$categories{ $pr->{'category'} }}, $pr;
5673         }
5674
5675         return wantarray ? %categories : \%categories;
5676 }
5677
5678 # print 'sort by' <th> element, generating 'sort by $name' replay link
5679 # if that order is not selected
5680 sub print_sort_th {
5681         print format_sort_th(@_);
5682 }
5683
5684 sub format_sort_th {
5685         my ($name, $order, $header) = @_;
5686         my $sort_th = "";
5687         $header ||= ucfirst($name);
5688
5689         if ($order eq $name) {
5690                 $sort_th .= "<th>$header</th>\n";
5691         } else {
5692                 $sort_th .= "<th>" .
5693                             $cgi->a({-href => href(-replay=>1, order=>$name),
5694                                      -class => "header"}, $header) .
5695                             "</th>\n";
5696         }
5697
5698         return $sort_th;
5699 }
5700
5701 sub git_project_list_rows {
5702         my ($projlist, $from, $to, $check_forks) = @_;
5703
5704         $from = 0 unless defined $from;
5705         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5706
5707         my $alternate = 1;
5708         for (my $i = $from; $i <= $to; $i++) {
5709                 my $pr = $projlist->[$i];
5710
5711                 if ($alternate) {
5712                         print "<tr class=\"dark\">\n";
5713                 } else {
5714                         print "<tr class=\"light\">\n";
5715                 }
5716                 $alternate ^= 1;
5717
5718                 if ($check_forks) {
5719                         print "<td>";
5720                         if ($pr->{'forks'}) {
5721                                 my $nforks = scalar @{$pr->{'forks'}};
5722                                 if ($nforks > 0) {
5723                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5724                                                        -title => "$nforks forks"}, "+");
5725                                 } else {
5726                                         print $cgi->span({-title => "$nforks forks"}, "+");
5727                                 }
5728                         }
5729                         print "</td>\n";
5730                 }
5731                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5732                                         -class => "list"},
5733                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5734                       "</td>\n" .
5735                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5736                                         -class => "list",
5737                                         -title => $pr->{'descr_long'}},
5738                                         $search_regexp
5739                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5740                                                                     $pr->{'descr'}, $search_regexp)
5741                                         : esc_html($pr->{'descr'})) .
5742                       "</td>\n";
5743                 unless ($omit_owner) {
5744                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5745                 }
5746                 unless ($omit_age_column) {
5747                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5748                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5749                 }
5750                 print"<td class=\"link\">" .
5751                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5752                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5753                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5754                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5755                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5756                       "</td>\n" .
5757                       "</tr>\n";
5758         }
5759 }
5760
5761 sub git_project_list_body {
5762         # actually uses global variable $project
5763         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5764         my @projects = @$projlist;
5765
5766         my $check_forks = gitweb_check_feature('forks');
5767         my $show_ctags  = gitweb_check_feature('ctags');
5768         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5769         $check_forks = undef
5770                 if ($tagfilter || $search_regexp);
5771
5772         # filtering out forks before filling info allows to do less work
5773         @projects = filter_forks_from_projects_list(\@projects)
5774                 if ($check_forks);
5775         # search_projects_list pre-fills required info
5776         @projects = search_projects_list(\@projects,
5777                                          'search_regexp' => $search_regexp,
5778                                          'tagfilter'  => $tagfilter)
5779                 if ($tagfilter || $search_regexp);
5780         # fill the rest
5781         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5782         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5783         push @all_fields, 'owner' unless($omit_owner);
5784         @projects = fill_project_list_info(\@projects, @all_fields);
5785
5786         $order ||= $default_projects_order;
5787         $from = 0 unless defined $from;
5788         $to = $#projects if (!defined $to || $#projects < $to);
5789
5790         # short circuit
5791         if ($from > $to) {
5792                 print "<center>\n".
5793                       "<b>No such projects found</b><br />\n".
5794                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5795                       "</center>\n<br />\n";
5796                 return;
5797         }
5798
5799         @projects = sort_projects_list(\@projects, $order);
5800
5801         if ($show_ctags) {
5802                 my $ctags = git_gather_all_ctags(\@projects);
5803                 my $cloud = git_populate_project_tagcloud($ctags);
5804                 print git_show_project_tagcloud($cloud, 64);
5805         }
5806
5807         print "<table class=\"project_list\">\n";
5808         unless ($no_header) {
5809                 print "<tr>\n";
5810                 if ($check_forks) {
5811                         print "<th></th>\n";
5812                 }
5813                 print_sort_th('project', $order, 'Project');
5814                 print_sort_th('descr', $order, 'Description');
5815                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5816                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5817                 print "<th></th>\n" . # for links
5818                       "</tr>\n";
5819         }
5820
5821         if ($projects_list_group_categories) {
5822                 # only display categories with projects in the $from-$to window
5823                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5824                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5825                 foreach my $cat (sort keys %categories) {
5826                         unless ($cat eq "") {
5827                                 print "<tr>\n";
5828                                 if ($check_forks) {
5829                                         print "<td></td>\n";
5830                                 }
5831                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5832                                 print "</tr>\n";
5833                         }
5834
5835                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5836                 }
5837         } else {
5838                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5839         }
5840
5841         if (defined $extra) {
5842                 print "<tr>\n";
5843                 if ($check_forks) {
5844                         print "<td></td>\n";
5845                 }
5846                 print "<td colspan=\"5\">$extra</td>\n" .
5847                       "</tr>\n";
5848         }
5849         print "</table>\n";
5850 }
5851
5852 sub git_log_body {
5853         # uses global variable $project
5854         my ($commitlist, $from, $to, $refs, $extra) = @_;
5855
5856         $from = 0 unless defined $from;
5857         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5858
5859         for (my $i = 0; $i <= $to; $i++) {
5860                 my %co = %{$commitlist->[$i]};
5861                 next if !%co;
5862                 my $commit = $co{'id'};
5863                 my $ref = format_ref_marker($refs, $commit);
5864                 git_print_header_div('commit',
5865                                "<span class=\"age\">$co{'age_string'}</span>" .
5866                                esc_html($co{'title'}) . $ref,
5867                                $commit);
5868                 print "<div class=\"title_text\">\n" .
5869                       "<div class=\"log_link\">\n" .
5870                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5871                       " | " .
5872                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5873                       " | " .
5874                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5875                       "<br/>\n" .
5876                       "</div>\n";
5877                       git_print_authorship(\%co, -tag => 'span');
5878                       print "<br/>\n</div>\n";
5879
5880                 print "<div class=\"log_body\">\n";
5881                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5882                 print "</div>\n";
5883         }
5884         if ($extra) {
5885                 print "<div class=\"page_nav\">\n";
5886                 print "$extra\n";
5887                 print "</div>\n";
5888         }
5889 }
5890
5891 sub git_shortlog_body {
5892         # uses global variable $project
5893         my ($commitlist, $from, $to, $refs, $extra) = @_;
5894
5895         $from = 0 unless defined $from;
5896         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5897
5898         print "<table class=\"shortlog\">\n";
5899         my $alternate = 1;
5900         for (my $i = $from; $i <= $to; $i++) {
5901                 my %co = %{$commitlist->[$i]};
5902                 my $commit = $co{'id'};
5903                 my $ref = format_ref_marker($refs, $commit);
5904                 if ($alternate) {
5905                         print "<tr class=\"dark\">\n";
5906                 } else {
5907                         print "<tr class=\"light\">\n";
5908                 }
5909                 $alternate ^= 1;
5910                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5911                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5912                       format_author_html('td', \%co, 10) . "<td>";
5913                 print format_subject_html($co{'title'}, $co{'title_short'},
5914                                           href(action=>"commit", hash=>$commit), $ref);
5915                 print "</td>\n" .
5916                       "<td class=\"link\">" .
5917                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5918                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5919                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5920                 my $snapshot_links = format_snapshot_links($commit);
5921                 if (defined $snapshot_links) {
5922                         print " | " . $snapshot_links;
5923                 }
5924                 print "</td>\n" .
5925                       "</tr>\n";
5926         }
5927         if (defined $extra) {
5928                 print "<tr>\n" .
5929                       "<td colspan=\"4\">$extra</td>\n" .
5930                       "</tr>\n";
5931         }
5932         print "</table>\n";
5933 }
5934
5935 sub git_history_body {
5936         # Warning: assumes constant type (blob or tree) during history
5937         my ($commitlist, $from, $to, $refs, $extra,
5938             $file_name, $file_hash, $ftype) = @_;
5939
5940         $from = 0 unless defined $from;
5941         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5942
5943         print "<table class=\"history\">\n";
5944         my $alternate = 1;
5945         for (my $i = $from; $i <= $to; $i++) {
5946                 my %co = %{$commitlist->[$i]};
5947                 if (!%co) {
5948                         next;
5949                 }
5950                 my $commit = $co{'id'};
5951
5952                 my $ref = format_ref_marker($refs, $commit);
5953
5954                 if ($alternate) {
5955                         print "<tr class=\"dark\">\n";
5956                 } else {
5957                         print "<tr class=\"light\">\n";
5958                 }
5959                 $alternate ^= 1;
5960                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5961         # shortlog:   format_author_html('td', \%co, 10)
5962                       format_author_html('td', \%co, 15, 3) . "<td>";
5963                 # originally git_history used chop_str($co{'title'}, 50)
5964                 print format_subject_html($co{'title'}, $co{'title_short'},
5965                                           href(action=>"commit", hash=>$commit), $ref);
5966                 print "</td>\n" .
5967                       "<td class=\"link\">" .
5968                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5969                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5970
5971                 if ($ftype eq 'blob') {
5972                         my $blob_current = $file_hash;
5973                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5974                         if (defined $blob_current && defined $blob_parent &&
5975                                         $blob_current ne $blob_parent) {
5976                                 print " | " .
5977                                         $cgi->a({-href => href(action=>"blobdiff",
5978                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5979                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5980                                                                file_name=>$file_name)},
5981                                                 "diff to current");
5982                         }
5983                 }
5984                 print "</td>\n" .
5985                       "</tr>\n";
5986         }
5987         if (defined $extra) {
5988                 print "<tr>\n" .
5989                       "<td colspan=\"4\">$extra</td>\n" .
5990                       "</tr>\n";
5991         }
5992         print "</table>\n";
5993 }
5994
5995 sub git_tags_body {
5996         # uses global variable $project
5997         my ($taglist, $from, $to, $extra) = @_;
5998         $from = 0 unless defined $from;
5999         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
6000
6001         print "<table class=\"tags\">\n";
6002         my $alternate = 1;
6003         for (my $i = $from; $i <= $to; $i++) {
6004                 my $entry = $taglist->[$i];
6005                 my %tag = %$entry;
6006                 my $comment = $tag{'subject'};
6007                 my $comment_short;
6008                 if (defined $comment) {
6009                         $comment_short = chop_str($comment, 30, 5);
6010                 }
6011                 if ($alternate) {
6012                         print "<tr class=\"dark\">\n";
6013                 } else {
6014                         print "<tr class=\"light\">\n";
6015                 }
6016                 $alternate ^= 1;
6017                 if (defined $tag{'age'}) {
6018                         print "<td><i>$tag{'age'}</i></td>\n";
6019                 } else {
6020                         print "<td></td>\n";
6021                 }
6022                 print "<td>" .
6023                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6024                                -class => "list name"}, esc_html($tag{'name'})) .
6025                       "</td>\n" .
6026                       "<td>";
6027                 if (defined $comment) {
6028                         print format_subject_html($comment, $comment_short,
6029                                                   href(action=>"tag", hash=>$tag{'id'}));
6030                 }
6031                 print "</td>\n" .
6032                       "<td class=\"selflink\">";
6033                 if ($tag{'type'} eq "tag") {
6034                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6035                 } else {
6036                         print "&nbsp;";
6037                 }
6038                 print "</td>\n" .
6039                       "<td class=\"link\">" . " | " .
6040                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6041                 if ($tag{'reftype'} eq "commit") {
6042                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6043                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6044                 } elsif ($tag{'reftype'} eq "blob") {
6045                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6046                 }
6047                 print "</td>\n" .
6048                       "</tr>";
6049         }
6050         if (defined $extra) {
6051                 print "<tr>\n" .
6052                       "<td colspan=\"5\">$extra</td>\n" .
6053                       "</tr>\n";
6054         }
6055         print "</table>\n";
6056 }
6057
6058 sub git_heads_body {
6059         # uses global variable $project
6060         my ($headlist, $head_at, $from, $to, $extra) = @_;
6061         $from = 0 unless defined $from;
6062         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6063
6064         print "<table class=\"heads\">\n";
6065         my $alternate = 1;
6066         for (my $i = $from; $i <= $to; $i++) {
6067                 my $entry = $headlist->[$i];
6068                 my %ref = %$entry;
6069                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6070                 if ($alternate) {
6071                         print "<tr class=\"dark\">\n";
6072                 } else {
6073                         print "<tr class=\"light\">\n";
6074                 }
6075                 $alternate ^= 1;
6076                 print "<td><i>$ref{'age'}</i></td>\n" .
6077                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6078                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6079                                -class => "list name"},esc_html($ref{'name'})) .
6080                       "</td>\n" .
6081                       "<td class=\"link\">" .
6082                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6083                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6084                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6085                       "</td>\n" .
6086                       "</tr>";
6087         }
6088         if (defined $extra) {
6089                 print "<tr>\n" .
6090                       "<td colspan=\"3\">$extra</td>\n" .
6091                       "</tr>\n";
6092         }
6093         print "</table>\n";
6094 }
6095
6096 # Display a single remote block
6097 sub git_remote_block {
6098         my ($remote, $rdata, $limit, $head) = @_;
6099
6100         my $heads = $rdata->{'heads'};
6101         my $fetch = $rdata->{'fetch'};
6102         my $push = $rdata->{'push'};
6103
6104         my $urls_table = "<table class=\"projects_list\">\n" ;
6105
6106         if (defined $fetch) {
6107                 if ($fetch eq $push) {
6108                         $urls_table .= format_repo_url("URL", $fetch);
6109                 } else {
6110                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6111                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6112                 }
6113         } elsif (defined $push) {
6114                 $urls_table .= format_repo_url("Push URL", $push);
6115         } else {
6116                 $urls_table .= format_repo_url("", "No remote URL");
6117         }
6118
6119         $urls_table .= "</table>\n";
6120
6121         my $dots;
6122         if (defined $limit && $limit < @$heads) {
6123                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6124         }
6125
6126         print $urls_table;
6127         git_heads_body($heads, $head, 0, $limit, $dots);
6128 }
6129
6130 # Display a list of remote names with the respective fetch and push URLs
6131 sub git_remotes_list {
6132         my ($remotedata, $limit) = @_;
6133         print "<table class=\"heads\">\n";
6134         my $alternate = 1;
6135         my @remotes = sort keys %$remotedata;
6136
6137         my $limited = $limit && $limit < @remotes;
6138
6139         $#remotes = $limit - 1 if $limited;
6140
6141         while (my $remote = shift @remotes) {
6142                 my $rdata = $remotedata->{$remote};
6143                 my $fetch = $rdata->{'fetch'};
6144                 my $push = $rdata->{'push'};
6145                 if ($alternate) {
6146                         print "<tr class=\"dark\">\n";
6147                 } else {
6148                         print "<tr class=\"light\">\n";
6149                 }
6150                 $alternate ^= 1;
6151                 print "<td>" .
6152                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6153                                -class=> "list name"},esc_html($remote)) .
6154                       "</td>";
6155                 print "<td class=\"link\">" .
6156                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6157                       " | " .
6158                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6159                       "</td>";
6160
6161                 print "</tr>\n";
6162         }
6163
6164         if ($limited) {
6165                 print "<tr>\n" .
6166                       "<td colspan=\"3\">" .
6167                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6168                       "</td>\n" . "</tr>\n";
6169         }
6170
6171         print "</table>";
6172 }
6173
6174 # Display remote heads grouped by remote, unless there are too many
6175 # remotes, in which case we only display the remote names
6176 sub git_remotes_body {
6177         my ($remotedata, $limit, $head) = @_;
6178         if ($limit and $limit < keys %$remotedata) {
6179                 git_remotes_list($remotedata, $limit);
6180         } else {
6181                 fill_remote_heads($remotedata);
6182                 while (my ($remote, $rdata) = each %$remotedata) {
6183                         git_print_section({-class=>"remote", -id=>$remote},
6184                                 ["remotes", $remote, $remote], sub {
6185                                         git_remote_block($remote, $rdata, $limit, $head);
6186                                 });
6187                 }
6188         }
6189 }
6190
6191 sub git_search_message {
6192         my %co = @_;
6193
6194         my $greptype;
6195         if ($searchtype eq 'commit') {
6196                 $greptype = "--grep=";
6197         } elsif ($searchtype eq 'author') {
6198                 $greptype = "--author=";
6199         } elsif ($searchtype eq 'committer') {
6200                 $greptype = "--committer=";
6201         }
6202         $greptype .= $searchtext;
6203         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6204                                        $greptype, '--regexp-ignore-case',
6205                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6206
6207         my $paging_nav = '';
6208         if ($page > 0) {
6209                 $paging_nav .=
6210                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6211                                 "first") .
6212                         " &sdot; " .
6213                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6214                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6215         } else {
6216                 $paging_nav .= "first &sdot; prev";
6217         }
6218         my $next_link = '';
6219         if ($#commitlist >= 100) {
6220                 $next_link =
6221                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6222                                  -accesskey => "n", -title => "Alt-n"}, "next");
6223                 $paging_nav .= " &sdot; $next_link";
6224         } else {
6225                 $paging_nav .= " &sdot; next";
6226         }
6227
6228         git_header_html();
6229
6230         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6231         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6232         if ($page == 0 && !@commitlist) {
6233                 print "<p>No match.</p>\n";
6234         } else {
6235                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6236         }
6237
6238         git_footer_html();
6239 }
6240
6241 sub git_search_changes {
6242         my %co = @_;
6243
6244         local $/ = "\n";
6245         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6246                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6247                 ($search_use_regexp ? '--pickaxe-regex' : ())
6248                         or die_error(500, "Open git-log failed");
6249
6250         git_header_html();
6251
6252         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6253         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6254
6255         print "<table class=\"pickaxe search\">\n";
6256         my $alternate = 1;
6257         undef %co;
6258         my @files;
6259         while (my $line = <$fd>) {
6260                 chomp $line;
6261                 next unless $line;
6262
6263                 my %set = parse_difftree_raw_line($line);
6264                 if (defined $set{'commit'}) {
6265                         # finish previous commit
6266                         if (%co) {
6267                                 print "</td>\n" .
6268                                       "<td class=\"link\">" .
6269                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6270                                               "commit") .
6271                                       " | " .
6272                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6273                                                              hash_base=>$co{'id'})},
6274                                               "tree") .
6275                                       "</td>\n" .
6276                                       "</tr>\n";
6277                         }
6278
6279                         if ($alternate) {
6280                                 print "<tr class=\"dark\">\n";
6281                         } else {
6282                                 print "<tr class=\"light\">\n";
6283                         }
6284                         $alternate ^= 1;
6285                         %co = parse_commit($set{'commit'});
6286                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6287                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6288                               "<td><i>$author</i></td>\n" .
6289                               "<td>" .
6290                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6291                                       -class => "list subject"},
6292                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6293                 } elsif (defined $set{'to_id'}) {
6294                         next if ($set{'to_id'} =~ m/^0{40}$/);
6295
6296                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6297                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6298                                       -class => "list"},
6299                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6300                               "<br/>\n";
6301                 }
6302         }
6303         close $fd;
6304
6305         # finish last commit (warning: repetition!)
6306         if (%co) {
6307                 print "</td>\n" .
6308                       "<td class=\"link\">" .
6309                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6310                               "commit") .
6311                       " | " .
6312                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6313                                              hash_base=>$co{'id'})},
6314                               "tree") .
6315                       "</td>\n" .
6316                       "</tr>\n";
6317         }
6318
6319         print "</table>\n";
6320
6321         git_footer_html();
6322 }
6323
6324 sub git_search_files {
6325         my %co = @_;
6326
6327         local $/ = "\n";
6328         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6329                 $search_use_regexp ? ('-E', '-i') : '-F',
6330                 $searchtext, $co{'tree'}
6331                         or die_error(500, "Open git-grep failed");
6332
6333         git_header_html();
6334
6335         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6336         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6337
6338         print "<table class=\"grep_search\">\n";
6339         my $alternate = 1;
6340         my $matches = 0;
6341         my $lastfile = '';
6342         my $file_href;
6343         while (my $line = <$fd>) {
6344                 chomp $line;
6345                 my ($file, $lno, $ltext, $binary);
6346                 last if ($matches++ > 1000);
6347                 if ($line =~ /^Binary file (.+) matches$/) {
6348                         $file = $1;
6349                         $binary = 1;
6350                 } else {
6351                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6352                         $file =~ s/^$co{'tree'}://;
6353                 }
6354                 if ($file ne $lastfile) {
6355                         $lastfile and print "</td></tr>\n";
6356                         if ($alternate++) {
6357                                 print "<tr class=\"dark\">\n";
6358                         } else {
6359                                 print "<tr class=\"light\">\n";
6360                         }
6361                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6362                                           file_name=>$file);
6363                         print "<td class=\"list\">".
6364                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6365                         print "</td><td>\n";
6366                         $lastfile = $file;
6367                 }
6368                 if ($binary) {
6369                         print "<div class=\"binary\">Binary file</div>\n";
6370                 } else {
6371                         $ltext = untabify($ltext);
6372                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6373                                 $ltext = esc_html($1, -nbsp=>1);
6374                                 $ltext .= '<span class="match">';
6375                                 $ltext .= esc_html($2, -nbsp=>1);
6376                                 $ltext .= '</span>';
6377                                 $ltext .= esc_html($3, -nbsp=>1);
6378                         } else {
6379                                 $ltext = esc_html($ltext, -nbsp=>1);
6380                         }
6381                         print "<div class=\"pre\">" .
6382                                 $cgi->a({-href => $file_href.'#l'.$lno,
6383                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6384                                 ' ' .  $ltext . "</div>\n";
6385                 }
6386         }
6387         if ($lastfile) {
6388                 print "</td></tr>\n";
6389                 if ($matches > 1000) {
6390                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6391                 }
6392         } else {
6393                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6394         }
6395         close $fd;
6396
6397         print "</table>\n";
6398
6399         git_footer_html();
6400 }
6401
6402 sub git_search_grep_body {
6403         my ($commitlist, $from, $to, $extra) = @_;
6404         $from = 0 unless defined $from;
6405         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6406
6407         print "<table class=\"commit_search\">\n";
6408         my $alternate = 1;
6409         for (my $i = $from; $i <= $to; $i++) {
6410                 my %co = %{$commitlist->[$i]};
6411                 if (!%co) {
6412                         next;
6413                 }
6414                 my $commit = $co{'id'};
6415                 if ($alternate) {
6416                         print "<tr class=\"dark\">\n";
6417                 } else {
6418                         print "<tr class=\"light\">\n";
6419                 }
6420                 $alternate ^= 1;
6421                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6422                       format_author_html('td', \%co, 15, 5) .
6423                       "<td>" .
6424                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6425                                -class => "list subject"},
6426                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6427                 my $comment = $co{'comment'};
6428                 foreach my $line (@$comment) {
6429                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6430                                 my ($lead, $match, $trail) = ($1, $2, $3);
6431                                 $match = chop_str($match, 70, 5, 'center');
6432                                 my $contextlen = int((80 - length($match))/2);
6433                                 $contextlen = 30 if ($contextlen > 30);
6434                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6435                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6436
6437                                 $lead  = esc_html($lead);
6438                                 $match = esc_html($match);
6439                                 $trail = esc_html($trail);
6440
6441                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6442                         }
6443                 }
6444                 print "</td>\n" .
6445                       "<td class=\"link\">" .
6446                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6447                       " | " .
6448                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6449                       " | " .
6450                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6451                 print "</td>\n" .
6452                       "</tr>\n";
6453         }
6454         if (defined $extra) {
6455                 print "<tr>\n" .
6456                       "<td colspan=\"3\">$extra</td>\n" .
6457                       "</tr>\n";
6458         }
6459         print "</table>\n";
6460 }
6461
6462 ## ======================================================================
6463 ## ======================================================================
6464 ## actions
6465
6466 sub git_project_list {
6467         my $order = $input_params{'order'};
6468         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6469                 die_error(400, "Unknown order parameter");
6470         }
6471
6472         my @list = git_get_projects_list($project_filter, $strict_export);
6473         if (!@list) {
6474                 die_error(404, "No projects found");
6475         }
6476
6477         git_header_html();
6478         if (defined $home_text && -f $home_text) {
6479                 print "<div class=\"index_include\">\n";
6480                 insert_file($home_text);
6481                 print "</div>\n";
6482         }
6483
6484         git_project_search_form($searchtext, $search_use_regexp);
6485         git_project_list_body(\@list, $order);
6486         git_footer_html();
6487 }
6488
6489 sub git_forks {
6490         my $order = $input_params{'order'};
6491         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6492                 die_error(400, "Unknown order parameter");
6493         }
6494
6495         my $filter = $project;
6496         $filter =~ s/\.git$//;
6497         my @list = git_get_projects_list($filter);
6498         if (!@list) {
6499                 die_error(404, "No forks found");
6500         }
6501
6502         git_header_html();
6503         git_print_page_nav('','');
6504         git_print_header_div('summary', "$project forks");
6505         git_project_list_body(\@list, $order);
6506         git_footer_html();
6507 }
6508
6509 sub git_project_index {
6510         my @projects = git_get_projects_list($project_filter, $strict_export);
6511         if (!@projects) {
6512                 die_error(404, "No projects found");
6513         }
6514
6515         print $cgi->header(
6516                 -type => 'text/plain',
6517                 -charset => 'utf-8',
6518                 -content_disposition => 'inline; filename="index.aux"');
6519
6520         foreach my $pr (@projects) {
6521                 if (!exists $pr->{'owner'}) {
6522                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6523                 }
6524
6525                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6526                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6527                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6528                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6529                 $path  =~ s/ /\+/g;
6530                 $owner =~ s/ /\+/g;
6531
6532                 print "$path $owner\n";
6533         }
6534 }
6535
6536 sub git_summary {
6537         my $descr = git_get_project_description($project) || "none";
6538         my %co = parse_commit("HEAD");
6539         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6540         my $head = $co{'id'};
6541         my $remote_heads = gitweb_check_feature('remote_heads');
6542
6543         my $owner = git_get_project_owner($project);
6544
6545         my $refs = git_get_references();
6546         # These get_*_list functions return one more to allow us to see if
6547         # there are more ...
6548         my @taglist  = git_get_tags_list(16);
6549         my @headlist = git_get_heads_list(16);
6550         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6551         my @forklist;
6552         my $check_forks = gitweb_check_feature('forks');
6553
6554         if ($check_forks) {
6555                 # find forks of a project
6556                 my $filter = $project;
6557                 $filter =~ s/\.git$//;
6558                 @forklist = git_get_projects_list($filter);
6559                 # filter out forks of forks
6560                 @forklist = filter_forks_from_projects_list(\@forklist)
6561                         if (@forklist);
6562         }
6563
6564         git_header_html();
6565         git_print_page_nav('summary','', $head);
6566
6567         print "<div class=\"title\">&nbsp;</div>\n";
6568         print "<table class=\"projects_list\">\n" .
6569               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6570         if ($owner and not $omit_owner) {
6571                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6572         }
6573         if (defined $cd{'rfc2822'}) {
6574                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6575                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6576         }
6577
6578         # use per project git URL list in $projectroot/$project/cloneurl
6579         # or make project git URL from git base URL and project name
6580         my $url_tag = "URL";
6581         my @url_list = git_get_project_url_list($project);
6582         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6583         foreach my $git_url (@url_list) {
6584                 next unless $git_url;
6585                 print format_repo_url($url_tag, $git_url);
6586                 $url_tag = "";
6587         }
6588
6589         # Tag cloud
6590         my $show_ctags = gitweb_check_feature('ctags');
6591         if ($show_ctags) {
6592                 my $ctags = git_get_project_ctags($project);
6593                 if (%$ctags) {
6594                         # without ability to add tags, don't show if there are none
6595                         my $cloud = git_populate_project_tagcloud($ctags);
6596                         print "<tr id=\"metadata_ctags\">" .
6597                               "<td>content tags</td>" .
6598                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6599                               "</tr>\n";
6600                 }
6601         }
6602
6603         print "</table>\n";
6604
6605         # If XSS prevention is on, we don't include README.html.
6606         # TODO: Allow a readme in some safe format.
6607         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6608                 print "<div class=\"title\">readme</div>\n" .
6609                       "<div class=\"readme\">\n";
6610                 insert_file("$projectroot/$project/README.html");
6611                 print "\n</div>\n"; # class="readme"
6612         }
6613
6614         # we need to request one more than 16 (0..15) to check if
6615         # those 16 are all
6616         my @commitlist = $head ? parse_commits($head, 17) : ();
6617         if (@commitlist) {
6618                 git_print_header_div('shortlog');
6619                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6620                                   $#commitlist <=  15 ? undef :
6621                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6622         }
6623
6624         if (@taglist) {
6625                 git_print_header_div('tags');
6626                 git_tags_body(\@taglist, 0, 15,
6627                               $#taglist <=  15 ? undef :
6628                               $cgi->a({-href => href(action=>"tags")}, "..."));
6629         }
6630
6631         if (@headlist) {
6632                 git_print_header_div('heads');
6633                 git_heads_body(\@headlist, $head, 0, 15,
6634                                $#headlist <= 15 ? undef :
6635                                $cgi->a({-href => href(action=>"heads")}, "..."));
6636         }
6637
6638         if (%remotedata) {
6639                 git_print_header_div('remotes');
6640                 git_remotes_body(\%remotedata, 15, $head);
6641         }
6642
6643         if (@forklist) {
6644                 git_print_header_div('forks');
6645                 git_project_list_body(\@forklist, 'age', 0, 15,
6646                                       $#forklist <= 15 ? undef :
6647                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6648                                       'no_header');
6649         }
6650
6651         git_footer_html();
6652 }
6653
6654 sub git_tag {
6655         my %tag = parse_tag($hash);
6656
6657         if (! %tag) {
6658                 die_error(404, "Unknown tag object");
6659         }
6660
6661         my $head = git_get_head_hash($project);
6662         git_header_html();
6663         git_print_page_nav('','', $head,undef,$head);
6664         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6665         print "<div class=\"title_text\">\n" .
6666               "<table class=\"object_header\">\n" .
6667               "<tr>\n" .
6668               "<td>object</td>\n" .
6669               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6670                                $tag{'object'}) . "</td>\n" .
6671               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6672                                               $tag{'type'}) . "</td>\n" .
6673               "</tr>\n";
6674         if (defined($tag{'author'})) {
6675                 git_print_authorship_rows(\%tag, 'author');
6676         }
6677         print "</table>\n\n" .
6678               "</div>\n";
6679         print "<div class=\"page_body\">";
6680         my $comment = $tag{'comment'};
6681         foreach my $line (@$comment) {
6682                 chomp $line;
6683                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6684         }
6685         print "</div>\n";
6686         git_footer_html();
6687 }
6688
6689 sub git_blame_common {
6690         my $format = shift || 'porcelain';
6691         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6692                 $format = 'incremental';
6693                 $action = 'blame_incremental'; # for page title etc
6694         }
6695
6696         # permissions
6697         gitweb_check_feature('blame')
6698                 or die_error(403, "Blame view not allowed");
6699
6700         # error checking
6701         die_error(400, "No file name given") unless $file_name;
6702         $hash_base ||= git_get_head_hash($project);
6703         die_error(404, "Couldn't find base commit") unless $hash_base;
6704         my %co = parse_commit($hash_base)
6705                 or die_error(404, "Commit not found");
6706         my $ftype = "blob";
6707         if (!defined $hash) {
6708                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6709                         or die_error(404, "Error looking up file");
6710         } else {
6711                 $ftype = git_get_type($hash);
6712                 if ($ftype !~ "blob") {
6713                         die_error(400, "Object is not a blob");
6714                 }
6715         }
6716
6717         my $fd;
6718         if ($format eq 'incremental') {
6719                 # get file contents (as base)
6720                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6721                         or die_error(500, "Open git-cat-file failed");
6722         } elsif ($format eq 'data') {
6723                 # run git-blame --incremental
6724                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6725                         $hash_base, "--", $file_name
6726                         or die_error(500, "Open git-blame --incremental failed");
6727         } else {
6728                 # run git-blame --porcelain
6729                 open $fd, "-|", git_cmd(), "blame", '-p',
6730                         $hash_base, '--', $file_name
6731                         or die_error(500, "Open git-blame --porcelain failed");
6732         }
6733         binmode $fd, ':utf8';
6734
6735         # incremental blame data returns early
6736         if ($format eq 'data') {
6737                 print $cgi->header(
6738                         -type=>"text/plain", -charset => "utf-8",
6739                         -status=> "200 OK");
6740                 local $| = 1; # output autoflush
6741                 while (my $line = <$fd>) {
6742                         print to_utf8($line);
6743                 }
6744                 close $fd
6745                         or print "ERROR $!\n";
6746
6747                 print 'END';
6748                 if (defined $t0 && gitweb_check_feature('timed')) {
6749                         print ' '.
6750                               tv_interval($t0, [ gettimeofday() ]).
6751                               ' '.$number_of_git_cmds;
6752                 }
6753                 print "\n";
6754
6755                 return;
6756         }
6757
6758         # page header
6759         git_header_html();
6760         my $formats_nav =
6761                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6762                         "blob") .
6763                 " | ";
6764         if ($format eq 'incremental') {
6765                 $formats_nav .=
6766                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6767                                 "blame") . " (non-incremental)";
6768         } else {
6769                 $formats_nav .=
6770                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6771                                 "blame") . " (incremental)";
6772         }
6773         $formats_nav .=
6774                 " | " .
6775                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6776                         "history") .
6777                 " | " .
6778                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6779                         "HEAD");
6780         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6781         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6782         git_print_page_path($file_name, $ftype, $hash_base);
6783
6784         # page body
6785         if ($format eq 'incremental') {
6786                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6787                       "This page requires JavaScript to run.\n Use ".
6788                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6789                               'this page').
6790                       " instead.\n".
6791                       "</b></center></div>\n</noscript>\n";
6792
6793                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6794         }
6795
6796         print qq!<div class="page_body">\n!;
6797         print qq!<div id="progress_info">... / ...</div>\n!
6798                 if ($format eq 'incremental');
6799         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6800               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6801               qq!<thead>\n!.
6802               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6803               qq!</thead>\n!.
6804               qq!<tbody>\n!;
6805
6806         my @rev_color = qw(light dark);
6807         my $num_colors = scalar(@rev_color);
6808         my $current_color = 0;
6809
6810         if ($format eq 'incremental') {
6811                 my $color_class = $rev_color[$current_color];
6812
6813                 #contents of a file
6814                 my $linenr = 0;
6815         LINE:
6816                 while (my $line = <$fd>) {
6817                         chomp $line;
6818                         $linenr++;
6819
6820                         print qq!<tr id="l$linenr" class="$color_class">!.
6821                               qq!<td class="sha1"><a href=""> </a></td>!.
6822                               qq!<td class="linenr">!.
6823                               qq!<a class="linenr" href="">$linenr</a></td>!;
6824                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6825                         print qq!</tr>\n!;
6826                 }
6827
6828         } else { # porcelain, i.e. ordinary blame
6829                 my %metainfo = (); # saves information about commits
6830
6831                 # blame data
6832         LINE:
6833                 while (my $line = <$fd>) {
6834                         chomp $line;
6835                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6836                         # no <lines in group> for subsequent lines in group of lines
6837                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6838                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6839                         if (!exists $metainfo{$full_rev}) {
6840                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6841                         }
6842                         my $meta = $metainfo{$full_rev};
6843                         my $data;
6844                         while ($data = <$fd>) {
6845                                 chomp $data;
6846                                 last if ($data =~ s/^\t//); # contents of line
6847                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6848                                         $meta->{$1} = $2 unless exists $meta->{$1};
6849                                 }
6850                                 if ($data =~ /^previous /) {
6851                                         $meta->{'nprevious'}++;
6852                                 }
6853                         }
6854                         my $short_rev = substr($full_rev, 0, 8);
6855                         my $author = $meta->{'author'};
6856                         my %date =
6857                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6858                         my $date = $date{'iso-tz'};
6859                         if ($group_size) {
6860                                 $current_color = ($current_color + 1) % $num_colors;
6861                         }
6862                         my $tr_class = $rev_color[$current_color];
6863                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6864                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6865                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6866                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6867                         if ($group_size) {
6868                                 print "<td class=\"sha1\"";
6869                                 print " title=\"". esc_html($author) . ", $date\"";
6870                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6871                                 print ">";
6872                                 print $cgi->a({-href => href(action=>"commit",
6873                                                              hash=>$full_rev,
6874                                                              file_name=>$file_name)},
6875                                               esc_html($short_rev));
6876                                 if ($group_size >= 2) {
6877                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6878                                         if (@author_initials) {
6879                                                 print "<br />" .
6880                                                       esc_html(join('', @author_initials));
6881                                                 #           or join('.', ...)
6882                                         }
6883                                 }
6884                                 print "</td>\n";
6885                         }
6886                         # 'previous' <sha1 of parent commit> <filename at commit>
6887                         if (exists $meta->{'previous'} &&
6888                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6889                                 $meta->{'parent'} = $1;
6890                                 $meta->{'file_parent'} = unquote($2);
6891                         }
6892                         my $linenr_commit =
6893                                 exists($meta->{'parent'}) ?
6894                                 $meta->{'parent'} : $full_rev;
6895                         my $linenr_filename =
6896                                 exists($meta->{'file_parent'}) ?
6897                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6898                         my $blamed = href(action => 'blame',
6899                                           file_name => $linenr_filename,
6900                                           hash_base => $linenr_commit);
6901                         print "<td class=\"linenr\">";
6902                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6903                                         -class => "linenr" },
6904                                       esc_html($lineno));
6905                         print "</td>";
6906                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6907                         print "</tr>\n";
6908                 } # end while
6909
6910         }
6911
6912         # footer
6913         print "</tbody>\n".
6914               "</table>\n"; # class="blame"
6915         print "</div>\n";   # class="blame_body"
6916         close $fd
6917                 or print "Reading blob failed\n";
6918
6919         git_footer_html();
6920 }
6921
6922 sub git_blame {
6923         git_blame_common();
6924 }
6925
6926 sub git_blame_incremental {
6927         git_blame_common('incremental');
6928 }
6929
6930 sub git_blame_data {
6931         git_blame_common('data');
6932 }
6933
6934 sub git_tags {
6935         my $head = git_get_head_hash($project);
6936         git_header_html();
6937         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6938         git_print_header_div('summary', $project);
6939
6940         my @tagslist = git_get_tags_list();
6941         if (@tagslist) {
6942                 git_tags_body(\@tagslist);
6943         }
6944         git_footer_html();
6945 }
6946
6947 sub git_heads {
6948         my $head = git_get_head_hash($project);
6949         git_header_html();
6950         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6951         git_print_header_div('summary', $project);
6952
6953         my @headslist = git_get_heads_list();
6954         if (@headslist) {
6955                 git_heads_body(\@headslist, $head);
6956         }
6957         git_footer_html();
6958 }
6959
6960 # used both for single remote view and for list of all the remotes
6961 sub git_remotes {
6962         gitweb_check_feature('remote_heads')
6963                 or die_error(403, "Remote heads view is disabled");
6964
6965         my $head = git_get_head_hash($project);
6966         my $remote = $input_params{'hash'};
6967
6968         my $remotedata = git_get_remotes_list($remote);
6969         die_error(500, "Unable to get remote information") unless defined $remotedata;
6970
6971         unless (%$remotedata) {
6972                 die_error(404, defined $remote ?
6973                         "Remote $remote not found" :
6974                         "No remotes found");
6975         }
6976
6977         git_header_html(undef, undef, -action_extra => $remote);
6978         git_print_page_nav('', '',  $head, undef, $head,
6979                 format_ref_views($remote ? '' : 'remotes'));
6980
6981         fill_remote_heads($remotedata);
6982         if (defined $remote) {
6983                 git_print_header_div('remotes', "$remote remote for $project");
6984                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6985         } else {
6986                 git_print_header_div('summary', "$project remotes");
6987                 git_remotes_body($remotedata, undef, $head);
6988         }
6989
6990         git_footer_html();
6991 }
6992
6993 sub git_blob_plain {
6994         my $type = shift;
6995         my $expires;
6996
6997         if (!defined $hash) {
6998                 if (defined $file_name) {
6999                         my $base = $hash_base || git_get_head_hash($project);
7000                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7001                                 or die_error(404, "Cannot find file");
7002                 } else {
7003                         die_error(400, "No file name defined");
7004                 }
7005         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7006                 # blobs defined by non-textual hash id's can be cached
7007                 $expires = "+1d";
7008         }
7009
7010         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7011                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7012
7013         # content-type (can include charset)
7014         $type = blob_contenttype($fd, $file_name, $type);
7015
7016         # "save as" filename, even when no $file_name is given
7017         my $save_as = "$hash";
7018         if (defined $file_name) {
7019                 $save_as = $file_name;
7020         } elsif ($type =~ m/^text\//) {
7021                 $save_as .= '.txt';
7022         }
7023
7024         # With XSS prevention on, blobs of all types except a few known safe
7025         # ones are served with "Content-Disposition: attachment" to make sure
7026         # they don't run in our security domain.  For certain image types,
7027         # blob view writes an <img> tag referring to blob_plain view, and we
7028         # want to be sure not to break that by serving the image as an
7029         # attachment (though Firefox 3 doesn't seem to care).
7030         my $sandbox = $prevent_xss &&
7031                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7032
7033         # serve text/* as text/plain
7034         if ($prevent_xss &&
7035             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7036              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7037                 my $rest = $1;
7038                 $rest = defined $rest ? $rest : '';
7039                 $type = "text/plain$rest";
7040         }
7041
7042         print $cgi->header(
7043                 -type => $type,
7044                 -expires => $expires,
7045                 -content_disposition =>
7046                         ($sandbox ? 'attachment' : 'inline')
7047                         . '; filename="' . $save_as . '"');
7048         local $/ = undef;
7049         binmode STDOUT, ':raw';
7050         print <$fd>;
7051         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7052         close $fd;
7053 }
7054
7055 sub git_blob {
7056         my $expires;
7057
7058         if (!defined $hash) {
7059                 if (defined $file_name) {
7060                         my $base = $hash_base || git_get_head_hash($project);
7061                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7062                                 or die_error(404, "Cannot find file");
7063                 } else {
7064                         die_error(400, "No file name defined");
7065                 }
7066         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7067                 # blobs defined by non-textual hash id's can be cached
7068                 $expires = "+1d";
7069         }
7070
7071         my $have_blame = gitweb_check_feature('blame');
7072         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7073                 or die_error(500, "Couldn't cat $file_name, $hash");
7074         my $mimetype = blob_mimetype($fd, $file_name);
7075         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7076         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7077                 close $fd;
7078                 return git_blob_plain($mimetype);
7079         }
7080         # we can have blame only for text/* mimetype
7081         $have_blame &&= ($mimetype =~ m!^text/!);
7082
7083         my $highlight = gitweb_check_feature('highlight');
7084         my $syntax = guess_file_syntax($highlight, $file_name);
7085         $fd = run_highlighter($fd, $highlight, $syntax);
7086
7087         git_header_html(undef, $expires);
7088         my $formats_nav = '';
7089         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7090                 if (defined $file_name) {
7091                         if ($have_blame) {
7092                                 $formats_nav .=
7093                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7094                                                 "blame") .
7095                                         " | ";
7096                         }
7097                         $formats_nav .=
7098                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7099                                         "history") .
7100                                 " | " .
7101                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7102                                         "raw") .
7103                                 " | " .
7104                                 $cgi->a({-href => href(action=>"blob",
7105                                                        hash_base=>"HEAD", file_name=>$file_name)},
7106                                         "HEAD");
7107                 } else {
7108                         $formats_nav .=
7109                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7110                                         "raw");
7111                 }
7112                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7113                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7114         } else {
7115                 print "<div class=\"page_nav\">\n" .
7116                       "<br/><br/></div>\n" .
7117                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7118         }
7119         git_print_page_path($file_name, "blob", $hash_base);
7120         print "<div class=\"page_body\">\n";
7121         if ($mimetype =~ m!^image/!) {
7122                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7123                 if ($file_name) {
7124                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7125                 }
7126                 print qq! src="! .
7127                       href(action=>"blob_plain", hash=>$hash,
7128                            hash_base=>$hash_base, file_name=>$file_name) .
7129                       qq!" />\n!;
7130         } else {
7131                 my $nr;
7132                 while (my $line = <$fd>) {
7133                         chomp $line;
7134                         $nr++;
7135                         $line = untabify($line);
7136                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7137                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7138                                $highlight ? sanitize($line) : esc_html($line, -nbsp=>1);
7139                 }
7140         }
7141         close $fd
7142                 or print "Reading blob failed.\n";
7143         print "</div>";
7144         git_footer_html();
7145 }
7146
7147 sub git_tree {
7148         if (!defined $hash_base) {
7149                 $hash_base = "HEAD";
7150         }
7151         if (!defined $hash) {
7152                 if (defined $file_name) {
7153                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7154                 } else {
7155                         $hash = $hash_base;
7156                 }
7157         }
7158         die_error(404, "No such tree") unless defined($hash);
7159
7160         my $show_sizes = gitweb_check_feature('show-sizes');
7161         my $have_blame = gitweb_check_feature('blame');
7162
7163         my @entries = ();
7164         {
7165                 local $/ = "\0";
7166                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7167                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7168                         or die_error(500, "Open git-ls-tree failed");
7169                 @entries = map { chomp; $_ } <$fd>;
7170                 close $fd
7171                         or die_error(404, "Reading tree failed");
7172         }
7173
7174         my $refs = git_get_references();
7175         my $ref = format_ref_marker($refs, $hash_base);
7176         git_header_html();
7177         my $basedir = '';
7178         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7179                 my @views_nav = ();
7180                 if (defined $file_name) {
7181                         push @views_nav,
7182                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7183                                         "history"),
7184                                 $cgi->a({-href => href(action=>"tree",
7185                                                        hash_base=>"HEAD", file_name=>$file_name)},
7186                                         "HEAD"),
7187                 }
7188                 my $snapshot_links = format_snapshot_links($hash);
7189                 if (defined $snapshot_links) {
7190                         # FIXME: Should be available when we have no hash base as well.
7191                         push @views_nav, $snapshot_links;
7192                 }
7193                 git_print_page_nav('tree','', $hash_base, undef, undef,
7194                                    join(' | ', @views_nav));
7195                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7196         } else {
7197                 undef $hash_base;
7198                 print "<div class=\"page_nav\">\n";
7199                 print "<br/><br/></div>\n";
7200                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7201         }
7202         if (defined $file_name) {
7203                 $basedir = $file_name;
7204                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7205                         $basedir .= '/';
7206                 }
7207                 git_print_page_path($file_name, 'tree', $hash_base);
7208         }
7209         print "<div class=\"page_body\">\n";
7210         print "<table class=\"tree\">\n";
7211         my $alternate = 1;
7212         # '..' (top directory) link if possible
7213         if (defined $hash_base &&
7214             defined $file_name && $file_name =~ m![^/]+$!) {
7215                 if ($alternate) {
7216                         print "<tr class=\"dark\">\n";
7217                 } else {
7218                         print "<tr class=\"light\">\n";
7219                 }
7220                 $alternate ^= 1;
7221
7222                 my $up = $file_name;
7223                 $up =~ s!/?[^/]+$!!;
7224                 undef $up unless $up;
7225                 # based on git_print_tree_entry
7226                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7227                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7228                 print '<td class="list">';
7229                 print $cgi->a({-href => href(action=>"tree",
7230                                              hash_base=>$hash_base,
7231                                              file_name=>$up)},
7232                               "..");
7233                 print "</td>\n";
7234                 print "<td class=\"link\"></td>\n";
7235
7236                 print "</tr>\n";
7237         }
7238         foreach my $line (@entries) {
7239                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7240
7241                 if ($alternate) {
7242                         print "<tr class=\"dark\">\n";
7243                 } else {
7244                         print "<tr class=\"light\">\n";
7245                 }
7246                 $alternate ^= 1;
7247
7248                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7249
7250                 print "</tr>\n";
7251         }
7252         print "</table>\n" .
7253               "</div>";
7254         git_footer_html();
7255 }
7256
7257 sub sanitize_for_filename {
7258     my $name = shift;
7259
7260     $name =~ s!/!-!g;
7261     $name =~ s/[^[:alnum:]_.-]//g;
7262
7263     return $name;
7264 }
7265
7266 sub snapshot_name {
7267         my ($project, $hash) = @_;
7268
7269         # path/to/project.git  -> project
7270         # path/to/project/.git -> project
7271         my $name = to_utf8($project);
7272         $name =~ s,([^/])/*\.git$,$1,;
7273         $name = sanitize_for_filename(basename($name));
7274
7275         my $ver = $hash;
7276         if ($hash =~ /^[0-9a-fA-F]+$/) {
7277                 # shorten SHA-1 hash
7278                 my $full_hash = git_get_full_hash($project, $hash);
7279                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7280                         $ver = git_get_short_hash($project, $hash);
7281                 }
7282         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7283                 # tags don't need shortened SHA-1 hash
7284                 $ver = $1;
7285         } else {
7286                 # branches and other need shortened SHA-1 hash
7287                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7288                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7289                         my $ref_dir = (defined $1) ? $1 : '';
7290                         $ver = $2;
7291
7292                         $ref_dir = sanitize_for_filename($ref_dir);
7293                         # for refs neither in heads nor remotes we want to
7294                         # add a ref dir to archive name
7295                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7296                                 $ver = $ref_dir . '-' . $ver;
7297                         }
7298                 }
7299                 $ver .= '-' . git_get_short_hash($project, $hash);
7300         }
7301         # special case of sanitization for filename - we change
7302         # slashes to dots instead of dashes
7303         # in case of hierarchical branch names
7304         $ver =~ s!/!.!g;
7305         $ver =~ s/[^[:alnum:]_.-]//g;
7306
7307         # name = project-version_string
7308         $name = "$name-$ver";
7309
7310         return wantarray ? ($name, $name) : $name;
7311 }
7312
7313 sub exit_if_unmodified_since {
7314         my ($latest_epoch) = @_;
7315         our $cgi;
7316
7317         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7318         if (defined $if_modified) {
7319                 my $since;
7320                 if (eval { require HTTP::Date; 1; }) {
7321                         $since = HTTP::Date::str2time($if_modified);
7322                 } elsif (eval { require Time::ParseDate; 1; }) {
7323                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7324                 }
7325                 if (defined $since && $latest_epoch <= $since) {
7326                         my %latest_date = parse_date($latest_epoch);
7327                         print $cgi->header(
7328                                 -last_modified => $latest_date{'rfc2822'},
7329                                 -status => '304 Not Modified');
7330                         goto DONE_GITWEB;
7331                 }
7332         }
7333 }
7334
7335 sub git_snapshot {
7336         my $format = $input_params{'snapshot_format'};
7337         if (!@snapshot_fmts) {
7338                 die_error(403, "Snapshots not allowed");
7339         }
7340         # default to first supported snapshot format
7341         $format ||= $snapshot_fmts[0];
7342         if ($format !~ m/^[a-z0-9]+$/) {
7343                 die_error(400, "Invalid snapshot format parameter");
7344         } elsif (!exists($known_snapshot_formats{$format})) {
7345                 die_error(400, "Unknown snapshot format");
7346         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7347                 die_error(403, "Snapshot format not allowed");
7348         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7349                 die_error(403, "Unsupported snapshot format");
7350         }
7351
7352         my $type = git_get_type("$hash^{}");
7353         if (!$type) {
7354                 die_error(404, 'Object does not exist');
7355         }  elsif ($type eq 'blob') {
7356                 die_error(400, 'Object is not a tree-ish');
7357         }
7358
7359         my ($name, $prefix) = snapshot_name($project, $hash);
7360         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7361
7362         my %co = parse_commit($hash);
7363         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7364
7365         my $cmd = quote_command(
7366                 git_cmd(), 'archive',
7367                 "--format=$known_snapshot_formats{$format}{'format'}",
7368                 "--prefix=$prefix/", $hash);
7369         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7370                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7371         }
7372
7373         $filename =~ s/(["\\])/\\$1/g;
7374         my %latest_date;
7375         if (%co) {
7376                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7377         }
7378
7379         print $cgi->header(
7380                 -type => $known_snapshot_formats{$format}{'type'},
7381                 -content_disposition => 'inline; filename="' . $filename . '"',
7382                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7383                 -status => '200 OK');
7384
7385         open my $fd, "-|", $cmd
7386                 or die_error(500, "Execute git-archive failed");
7387         binmode STDOUT, ':raw';
7388         print <$fd>;
7389         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7390         close $fd;
7391 }
7392
7393 sub git_log_generic {
7394         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7395
7396         my $head = git_get_head_hash($project);
7397         if (!defined $base) {
7398                 $base = $head;
7399         }
7400         if (!defined $page) {
7401                 $page = 0;
7402         }
7403         my $refs = git_get_references();
7404
7405         my $commit_hash = $base;
7406         if (defined $parent) {
7407                 $commit_hash = "$parent..$base";
7408         }
7409         my @commitlist =
7410                 parse_commits($commit_hash, 101, (100 * $page),
7411                               defined $file_name ? ($file_name, "--full-history") : ());
7412
7413         my $ftype;
7414         if (!defined $file_hash && defined $file_name) {
7415                 # some commits could have deleted file in question,
7416                 # and not have it in tree, but one of them has to have it
7417                 for (my $i = 0; $i < @commitlist; $i++) {
7418                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7419                         last if defined $file_hash;
7420                 }
7421         }
7422         if (defined $file_hash) {
7423                 $ftype = git_get_type($file_hash);
7424         }
7425         if (defined $file_name && !defined $ftype) {
7426                 die_error(500, "Unknown type of object");
7427         }
7428         my %co;
7429         if (defined $file_name) {
7430                 %co = parse_commit($base)
7431                         or die_error(404, "Unknown commit object");
7432         }
7433
7434
7435         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7436         my $next_link = '';
7437         if ($#commitlist >= 100) {
7438                 $next_link =
7439                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7440                                  -accesskey => "n", -title => "Alt-n"}, "next");
7441         }
7442         my $patch_max = gitweb_get_feature('patches');
7443         if ($patch_max && !defined $file_name) {
7444                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7445                         $paging_nav .= " &sdot; " .
7446                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7447                                         "patches");
7448                 }
7449         }
7450
7451         git_header_html();
7452         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7453         if (defined $file_name) {
7454                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7455         } else {
7456                 git_print_header_div('summary', $project)
7457         }
7458         git_print_page_path($file_name, $ftype, $hash_base)
7459                 if (defined $file_name);
7460
7461         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7462                      $file_name, $file_hash, $ftype);
7463
7464         git_footer_html();
7465 }
7466
7467 sub git_log {
7468         git_log_generic('log', \&git_log_body,
7469                         $hash, $hash_parent);
7470 }
7471
7472 sub git_commit {
7473         $hash ||= $hash_base || "HEAD";
7474         my %co = parse_commit($hash)
7475             or die_error(404, "Unknown commit object");
7476
7477         my $parent  = $co{'parent'};
7478         my $parents = $co{'parents'}; # listref
7479
7480         # we need to prepare $formats_nav before any parameter munging
7481         my $formats_nav;
7482         if (!defined $parent) {
7483                 # --root commitdiff
7484                 $formats_nav .= '(initial)';
7485         } elsif (@$parents == 1) {
7486                 # single parent commit
7487                 $formats_nav .=
7488                         '(parent: ' .
7489                         $cgi->a({-href => href(action=>"commit",
7490                                                hash=>$parent)},
7491                                 esc_html(substr($parent, 0, 7))) .
7492                         ')';
7493         } else {
7494                 # merge commit
7495                 $formats_nav .=
7496                         '(merge: ' .
7497                         join(' ', map {
7498                                 $cgi->a({-href => href(action=>"commit",
7499                                                        hash=>$_)},
7500                                         esc_html(substr($_, 0, 7)));
7501                         } @$parents ) .
7502                         ')';
7503         }
7504         if (gitweb_check_feature('patches') && @$parents <= 1) {
7505                 $formats_nav .= " | " .
7506                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7507                                 "patch");
7508         }
7509
7510         if (!defined $parent) {
7511                 $parent = "--root";
7512         }
7513         my @difftree;
7514         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7515                 @diff_opts,
7516                 (@$parents <= 1 ? $parent : '-c'),
7517                 $hash, "--"
7518                 or die_error(500, "Open git-diff-tree failed");
7519         @difftree = map { chomp; $_ } <$fd>;
7520         close $fd or die_error(404, "Reading git-diff-tree failed");
7521
7522         # non-textual hash id's can be cached
7523         my $expires;
7524         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7525                 $expires = "+1d";
7526         }
7527         my $refs = git_get_references();
7528         my $ref = format_ref_marker($refs, $co{'id'});
7529
7530         git_header_html(undef, $expires);
7531         git_print_page_nav('commit', '',
7532                            $hash, $co{'tree'}, $hash,
7533                            $formats_nav);
7534
7535         if (defined $co{'parent'}) {
7536                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7537         } else {
7538                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7539         }
7540         print "<div class=\"title_text\">\n" .
7541               "<table class=\"object_header\">\n";
7542         git_print_authorship_rows(\%co);
7543         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7544         print "<tr>" .
7545               "<td>tree</td>" .
7546               "<td class=\"sha1\">" .
7547               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7548                        class => "list"}, $co{'tree'}) .
7549               "</td>" .
7550               "<td class=\"link\">" .
7551               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7552                       "tree");
7553         my $snapshot_links = format_snapshot_links($hash);
7554         if (defined $snapshot_links) {
7555                 print " | " . $snapshot_links;
7556         }
7557         print "</td>" .
7558               "</tr>\n";
7559
7560         foreach my $par (@$parents) {
7561                 print "<tr>" .
7562                       "<td>parent</td>" .
7563                       "<td class=\"sha1\">" .
7564                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7565                                class => "list"}, $par) .
7566                       "</td>" .
7567                       "<td class=\"link\">" .
7568                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7569                       " | " .
7570                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7571                       "</td>" .
7572                       "</tr>\n";
7573         }
7574         print "</table>".
7575               "</div>\n";
7576
7577         print "<div class=\"page_body\">\n";
7578         git_print_log($co{'comment'});
7579         print "</div>\n";
7580
7581         git_difftree_body(\@difftree, $hash, @$parents);
7582
7583         git_footer_html();
7584 }
7585
7586 sub git_object {
7587         # object is defined by:
7588         # - hash or hash_base alone
7589         # - hash_base and file_name
7590         my $type;
7591
7592         # - hash or hash_base alone
7593         if ($hash || ($hash_base && !defined $file_name)) {
7594                 my $object_id = $hash || $hash_base;
7595
7596                 open my $fd, "-|", quote_command(
7597                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7598                         or die_error(404, "Object does not exist");
7599                 $type = <$fd>;
7600                 defined $type && chomp $type;
7601                 close $fd
7602                         or die_error(404, "Object does not exist");
7603
7604         # - hash_base and file_name
7605         } elsif ($hash_base && defined $file_name) {
7606                 $file_name =~ s,/+$,,;
7607
7608                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7609                         or die_error(404, "Base object does not exist");
7610
7611                 # here errors should not happen
7612                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7613                         or die_error(500, "Open git-ls-tree failed");
7614                 my $line = <$fd>;
7615                 close $fd;
7616
7617                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7618                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7619                         die_error(404, "File or directory for given base does not exist");
7620                 }
7621                 $type = $2;
7622                 $hash = $3;
7623         } else {
7624                 die_error(400, "Not enough information to find object");
7625         }
7626
7627         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7628                                           hash=>$hash, hash_base=>$hash_base,
7629                                           file_name=>$file_name),
7630                              -status => '302 Found');
7631 }
7632
7633 sub git_blobdiff {
7634         my $format = shift || 'html';
7635         my $diff_style = $input_params{'diff_style'} || 'inline';
7636
7637         my $fd;
7638         my @difftree;
7639         my %diffinfo;
7640         my $expires;
7641
7642         # preparing $fd and %diffinfo for git_patchset_body
7643         # new style URI
7644         if (defined $hash_base && defined $hash_parent_base) {
7645                 if (defined $file_name) {
7646                         # read raw output
7647                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7648                                 $hash_parent_base, $hash_base,
7649                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7650                                 or die_error(500, "Open git-diff-tree failed");
7651                         @difftree = map { chomp; $_ } <$fd>;
7652                         close $fd
7653                                 or die_error(404, "Reading git-diff-tree failed");
7654                         @difftree
7655                                 or die_error(404, "Blob diff not found");
7656
7657                 } elsif (defined $hash &&
7658                          $hash =~ /[0-9a-fA-F]{40}/) {
7659                         # try to find filename from $hash
7660
7661                         # read filtered raw output
7662                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7663                                 $hash_parent_base, $hash_base, "--"
7664                                 or die_error(500, "Open git-diff-tree failed");
7665                         @difftree =
7666                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7667                                 # $hash == to_id
7668                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7669                                 map { chomp; $_ } <$fd>;
7670                         close $fd
7671                                 or die_error(404, "Reading git-diff-tree failed");
7672                         @difftree
7673                                 or die_error(404, "Blob diff not found");
7674
7675                 } else {
7676                         die_error(400, "Missing one of the blob diff parameters");
7677                 }
7678
7679                 if (@difftree > 1) {
7680                         die_error(400, "Ambiguous blob diff specification");
7681                 }
7682
7683                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7684                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7685                 $file_name   ||= $diffinfo{'to_file'};
7686
7687                 $hash_parent ||= $diffinfo{'from_id'};
7688                 $hash        ||= $diffinfo{'to_id'};
7689
7690                 # non-textual hash id's can be cached
7691                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7692                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7693                         $expires = '+1d';
7694                 }
7695
7696                 # open patch output
7697                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7698                         '-p', ($format eq 'html' ? "--full-index" : ()),
7699                         $hash_parent_base, $hash_base,
7700                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7701                         or die_error(500, "Open git-diff-tree failed");
7702         }
7703
7704         # old/legacy style URI -- not generated anymore since 1.4.3.
7705         if (!%diffinfo) {
7706                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7707         }
7708
7709         # header
7710         if ($format eq 'html') {
7711                 my $formats_nav =
7712                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7713                                 "raw");
7714                 $formats_nav .= diff_style_nav($diff_style);
7715                 git_header_html(undef, $expires);
7716                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7717                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7718                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7719                 } else {
7720                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7721                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7722                 }
7723                 if (defined $file_name) {
7724                         git_print_page_path($file_name, "blob", $hash_base);
7725                 } else {
7726                         print "<div class=\"page_path\"></div>\n";
7727                 }
7728
7729         } elsif ($format eq 'plain') {
7730                 print $cgi->header(
7731                         -type => 'text/plain',
7732                         -charset => 'utf-8',
7733                         -expires => $expires,
7734                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7735
7736                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7737
7738         } else {
7739                 die_error(400, "Unknown blobdiff format");
7740         }
7741
7742         # patch
7743         if ($format eq 'html') {
7744                 print "<div class=\"page_body\">\n";
7745
7746                 git_patchset_body($fd, $diff_style,
7747                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7748                 close $fd;
7749
7750                 print "</div>\n"; # class="page_body"
7751                 git_footer_html();
7752
7753         } else {
7754                 while (my $line = <$fd>) {
7755                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7756                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7757
7758                         print $line;
7759
7760                         last if $line =~ m!^\+\+\+!;
7761                 }
7762                 local $/ = undef;
7763                 print <$fd>;
7764                 close $fd;
7765         }
7766 }
7767
7768 sub git_blobdiff_plain {
7769         git_blobdiff('plain');
7770 }
7771
7772 # assumes that it is added as later part of already existing navigation,
7773 # so it returns "| foo | bar" rather than just "foo | bar"
7774 sub diff_style_nav {
7775         my ($diff_style, $is_combined) = @_;
7776         $diff_style ||= 'inline';
7777
7778         return "" if ($is_combined);
7779
7780         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7781         my %styles = @styles;
7782         @styles =
7783                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7784
7785         return join '',
7786                 map { " | ".$_ }
7787                 map {
7788                         $_ eq $diff_style ? $styles{$_} :
7789                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7790                 } @styles;
7791 }
7792
7793 sub git_commitdiff {
7794         my %params = @_;
7795         my $format = $params{-format} || 'html';
7796         my $diff_style = $input_params{'diff_style'} || 'inline';
7797
7798         my ($patch_max) = gitweb_get_feature('patches');
7799         if ($format eq 'patch') {
7800                 die_error(403, "Patch view not allowed") unless $patch_max;
7801         }
7802
7803         $hash ||= $hash_base || "HEAD";
7804         my %co = parse_commit($hash)
7805             or die_error(404, "Unknown commit object");
7806
7807         # choose format for commitdiff for merge
7808         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7809                 $hash_parent = '--cc';
7810         }
7811         # we need to prepare $formats_nav before almost any parameter munging
7812         my $formats_nav;
7813         if ($format eq 'html') {
7814                 $formats_nav =
7815                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7816                                 "raw");
7817                 if ($patch_max && @{$co{'parents'}} <= 1) {
7818                         $formats_nav .= " | " .
7819                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7820                                         "patch");
7821                 }
7822                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7823
7824                 if (defined $hash_parent &&
7825                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7826                         # commitdiff with two commits given
7827                         my $hash_parent_short = $hash_parent;
7828                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7829                                 $hash_parent_short = substr($hash_parent, 0, 7);
7830                         }
7831                         $formats_nav .=
7832                                 ' (from';
7833                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7834                                 if ($co{'parents'}[$i] eq $hash_parent) {
7835                                         $formats_nav .= ' parent ' . ($i+1);
7836                                         last;
7837                                 }
7838                         }
7839                         $formats_nav .= ': ' .
7840                                 $cgi->a({-href => href(-replay=>1,
7841                                                        hash=>$hash_parent, hash_base=>undef)},
7842                                         esc_html($hash_parent_short)) .
7843                                 ')';
7844                 } elsif (!$co{'parent'}) {
7845                         # --root commitdiff
7846                         $formats_nav .= ' (initial)';
7847                 } elsif (scalar @{$co{'parents'}} == 1) {
7848                         # single parent commit
7849                         $formats_nav .=
7850                                 ' (parent: ' .
7851                                 $cgi->a({-href => href(-replay=>1,
7852                                                        hash=>$co{'parent'}, hash_base=>undef)},
7853                                         esc_html(substr($co{'parent'}, 0, 7))) .
7854                                 ')';
7855                 } else {
7856                         # merge commit
7857                         if ($hash_parent eq '--cc') {
7858                                 $formats_nav .= ' | ' .
7859                                         $cgi->a({-href => href(-replay=>1,
7860                                                                hash=>$hash, hash_parent=>'-c')},
7861                                                 'combined');
7862                         } else { # $hash_parent eq '-c'
7863                                 $formats_nav .= ' | ' .
7864                                         $cgi->a({-href => href(-replay=>1,
7865                                                                hash=>$hash, hash_parent=>'--cc')},
7866                                                 'compact');
7867                         }
7868                         $formats_nav .=
7869                                 ' (merge: ' .
7870                                 join(' ', map {
7871                                         $cgi->a({-href => href(-replay=>1,
7872                                                                hash=>$_, hash_base=>undef)},
7873                                                 esc_html(substr($_, 0, 7)));
7874                                 } @{$co{'parents'}} ) .
7875                                 ')';
7876                 }
7877         }
7878
7879         my $hash_parent_param = $hash_parent;
7880         if (!defined $hash_parent_param) {
7881                 # --cc for multiple parents, --root for parentless
7882                 $hash_parent_param =
7883                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7884         }
7885
7886         # read commitdiff
7887         my $fd;
7888         my @difftree;
7889         if ($format eq 'html') {
7890                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7891                         "--no-commit-id", "--patch-with-raw", "--full-index",
7892                         $hash_parent_param, $hash, "--"
7893                         or die_error(500, "Open git-diff-tree failed");
7894
7895                 while (my $line = <$fd>) {
7896                         chomp $line;
7897                         # empty line ends raw part of diff-tree output
7898                         last unless $line;
7899                         push @difftree, scalar parse_difftree_raw_line($line);
7900                 }
7901
7902         } elsif ($format eq 'plain') {
7903                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7904                         '-p', $hash_parent_param, $hash, "--"
7905                         or die_error(500, "Open git-diff-tree failed");
7906         } elsif ($format eq 'patch') {
7907                 # For commit ranges, we limit the output to the number of
7908                 # patches specified in the 'patches' feature.
7909                 # For single commits, we limit the output to a single patch,
7910                 # diverging from the git-format-patch default.
7911                 my @commit_spec = ();
7912                 if ($hash_parent) {
7913                         if ($patch_max > 0) {
7914                                 push @commit_spec, "-$patch_max";
7915                         }
7916                         push @commit_spec, '-n', "$hash_parent..$hash";
7917                 } else {
7918                         if ($params{-single}) {
7919                                 push @commit_spec, '-1';
7920                         } else {
7921                                 if ($patch_max > 0) {
7922                                         push @commit_spec, "-$patch_max";
7923                                 }
7924                                 push @commit_spec, "-n";
7925                         }
7926                         push @commit_spec, '--root', $hash;
7927                 }
7928                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7929                         '--encoding=utf8', '--stdout', @commit_spec
7930                         or die_error(500, "Open git-format-patch failed");
7931         } else {
7932                 die_error(400, "Unknown commitdiff format");
7933         }
7934
7935         # non-textual hash id's can be cached
7936         my $expires;
7937         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7938                 $expires = "+1d";
7939         }
7940
7941         # write commit message
7942         if ($format eq 'html') {
7943                 my $refs = git_get_references();
7944                 my $ref = format_ref_marker($refs, $co{'id'});
7945
7946                 git_header_html(undef, $expires);
7947                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7948                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7949                 print "<div class=\"title_text\">\n" .
7950                       "<table class=\"object_header\">\n";
7951                 git_print_authorship_rows(\%co);
7952                 print "</table>".
7953                       "</div>\n";
7954                 print "<div class=\"page_body\">\n";
7955                 if (@{$co{'comment'}} > 1) {
7956                         print "<div class=\"log\">\n";
7957                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7958                         print "</div>\n"; # class="log"
7959                 }
7960
7961         } elsif ($format eq 'plain') {
7962                 my $refs = git_get_references("tags");
7963                 my $tagname = git_get_rev_name_tags($hash);
7964                 my $filename = basename($project) . "-$hash.patch";
7965
7966                 print $cgi->header(
7967                         -type => 'text/plain',
7968                         -charset => 'utf-8',
7969                         -expires => $expires,
7970                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7971                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7972                 print "From: " . to_utf8($co{'author'}) . "\n";
7973                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7974                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7975
7976                 print "X-Git-Tag: $tagname\n" if $tagname;
7977                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7978
7979                 foreach my $line (@{$co{'comment'}}) {
7980                         print to_utf8($line) . "\n";
7981                 }
7982                 print "---\n\n";
7983         } elsif ($format eq 'patch') {
7984                 my $filename = basename($project) . "-$hash.patch";
7985
7986                 print $cgi->header(
7987                         -type => 'text/plain',
7988                         -charset => 'utf-8',
7989                         -expires => $expires,
7990                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7991         }
7992
7993         # write patch
7994         if ($format eq 'html') {
7995                 my $use_parents = !defined $hash_parent ||
7996                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7997                 git_difftree_body(\@difftree, $hash,
7998                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7999                 print "<br/>\n";
8000
8001                 git_patchset_body($fd, $diff_style,
8002                                   \@difftree, $hash,
8003                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8004                 close $fd;
8005                 print "</div>\n"; # class="page_body"
8006                 git_footer_html();
8007
8008         } elsif ($format eq 'plain') {
8009                 local $/ = undef;
8010                 print <$fd>;
8011                 close $fd
8012                         or print "Reading git-diff-tree failed\n";
8013         } elsif ($format eq 'patch') {
8014                 local $/ = undef;
8015                 print <$fd>;
8016                 close $fd
8017                         or print "Reading git-format-patch failed\n";
8018         }
8019 }
8020
8021 sub git_commitdiff_plain {
8022         git_commitdiff(-format => 'plain');
8023 }
8024
8025 # format-patch-style patches
8026 sub git_patch {
8027         git_commitdiff(-format => 'patch', -single => 1);
8028 }
8029
8030 sub git_patches {
8031         git_commitdiff(-format => 'patch');
8032 }
8033
8034 sub git_history {
8035         git_log_generic('history', \&git_history_body,
8036                         $hash_base, $hash_parent_base,
8037                         $file_name, $hash);
8038 }
8039
8040 sub git_search {
8041         $searchtype ||= 'commit';
8042
8043         # check if appropriate features are enabled
8044         gitweb_check_feature('search')
8045                 or die_error(403, "Search is disabled");
8046         if ($searchtype eq 'pickaxe') {
8047                 # pickaxe may take all resources of your box and run for several minutes
8048                 # with every query - so decide by yourself how public you make this feature
8049                 gitweb_check_feature('pickaxe')
8050                         or die_error(403, "Pickaxe search is disabled");
8051         }
8052         if ($searchtype eq 'grep') {
8053                 # grep search might be potentially CPU-intensive, too
8054                 gitweb_check_feature('grep')
8055                         or die_error(403, "Grep search is disabled");
8056         }
8057
8058         if (!defined $searchtext) {
8059                 die_error(400, "Text field is empty");
8060         }
8061         if (!defined $hash) {
8062                 $hash = git_get_head_hash($project);
8063         }
8064         my %co = parse_commit($hash);
8065         if (!%co) {
8066                 die_error(404, "Unknown commit object");
8067         }
8068         if (!defined $page) {
8069                 $page = 0;
8070         }
8071
8072         if ($searchtype eq 'commit' ||
8073             $searchtype eq 'author' ||
8074             $searchtype eq 'committer') {
8075                 git_search_message(%co);
8076         } elsif ($searchtype eq 'pickaxe') {
8077                 git_search_changes(%co);
8078         } elsif ($searchtype eq 'grep') {
8079                 git_search_files(%co);
8080         } else {
8081                 die_error(400, "Unknown search type");
8082         }
8083 }
8084
8085 sub git_search_help {
8086         git_header_html();
8087         git_print_page_nav('','', $hash,$hash,$hash);
8088         print <<EOT;
8089 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8090 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8091 the pattern entered is recognized as the POSIX extended
8092 <a href="https://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8093 insensitive).</p>
8094 <dl>
8095 <dt><b>commit</b></dt>
8096 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8097 EOT
8098         my $have_grep = gitweb_check_feature('grep');
8099         if ($have_grep) {
8100                 print <<EOT;
8101 <dt><b>grep</b></dt>
8102 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8103     a different one) are searched for the given pattern. On large trees, this search can take
8104 a while and put some strain on the server, so please use it with some consideration. Note that
8105 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8106 case-sensitive.</dd>
8107 EOT
8108         }
8109         print <<EOT;
8110 <dt><b>author</b></dt>
8111 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8112 <dt><b>committer</b></dt>
8113 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8114 EOT
8115         my $have_pickaxe = gitweb_check_feature('pickaxe');
8116         if ($have_pickaxe) {
8117                 print <<EOT;
8118 <dt><b>pickaxe</b></dt>
8119 <dd>All commits that caused the string to appear or disappear from any file (changes that
8120 added, removed or "modified" the string) will be listed. This search can take a while and
8121 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8122 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8123 EOT
8124         }
8125         print "</dl>\n";
8126         git_footer_html();
8127 }
8128
8129 sub git_shortlog {
8130         git_log_generic('shortlog', \&git_shortlog_body,
8131                         $hash, $hash_parent);
8132 }
8133
8134 ## ......................................................................
8135 ## feeds (RSS, Atom; OPML)
8136
8137 sub git_feed {
8138         my $format = shift || 'atom';
8139         my $have_blame = gitweb_check_feature('blame');
8140
8141         # Atom: http://www.atomenabled.org/developers/syndication/
8142         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8143         if ($format ne 'rss' && $format ne 'atom') {
8144                 die_error(400, "Unknown web feed format");
8145         }
8146
8147         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8148         my $head = $hash || 'HEAD';
8149         my @commitlist = parse_commits($head, 150, 0, $file_name);
8150
8151         my %latest_commit;
8152         my %latest_date;
8153         my $content_type = "application/$format+xml";
8154         if (defined $cgi->http('HTTP_ACCEPT') &&
8155                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8156                 # browser (feed reader) prefers text/xml
8157                 $content_type = 'text/xml';
8158         }
8159         if (defined($commitlist[0])) {
8160                 %latest_commit = %{$commitlist[0]};
8161                 my $latest_epoch = $latest_commit{'committer_epoch'};
8162                 exit_if_unmodified_since($latest_epoch);
8163                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8164         }
8165         print $cgi->header(
8166                 -type => $content_type,
8167                 -charset => 'utf-8',
8168                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8169                 -status => '200 OK');
8170
8171         # Optimization: skip generating the body if client asks only
8172         # for Last-Modified date.
8173         return if ($cgi->request_method() eq 'HEAD');
8174
8175         # header variables
8176         my $title = "$site_name - $project/$action";
8177         my $feed_type = 'log';
8178         if (defined $hash) {
8179                 $title .= " - '$hash'";
8180                 $feed_type = 'branch log';
8181                 if (defined $file_name) {
8182                         $title .= " :: $file_name";
8183                         $feed_type = 'history';
8184                 }
8185         } elsif (defined $file_name) {
8186                 $title .= " - $file_name";
8187                 $feed_type = 'history';
8188         }
8189         $title .= " $feed_type";
8190         $title = esc_html($title);
8191         my $descr = git_get_project_description($project);
8192         if (defined $descr) {
8193                 $descr = esc_html($descr);
8194         } else {
8195                 $descr = "$project " .
8196                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8197                          " feed";
8198         }
8199         my $owner = git_get_project_owner($project);
8200         $owner = esc_html($owner);
8201
8202         #header
8203         my $alt_url;
8204         if (defined $file_name) {
8205                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8206         } elsif (defined $hash) {
8207                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8208         } else {
8209                 $alt_url = href(-full=>1, action=>"summary");
8210         }
8211         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8212         if ($format eq 'rss') {
8213                 print <<XML;
8214 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8215 <channel>
8216 XML
8217                 print "<title>$title</title>\n" .
8218                       "<link>$alt_url</link>\n" .
8219                       "<description>$descr</description>\n" .
8220                       "<language>en</language>\n" .
8221                       # project owner is responsible for 'editorial' content
8222                       "<managingEditor>$owner</managingEditor>\n";
8223                 if (defined $logo || defined $favicon) {
8224                         # prefer the logo to the favicon, since RSS
8225                         # doesn't allow both
8226                         my $img = esc_url($logo || $favicon);
8227                         print "<image>\n" .
8228                               "<url>$img</url>\n" .
8229                               "<title>$title</title>\n" .
8230                               "<link>$alt_url</link>\n" .
8231                               "</image>\n";
8232                 }
8233                 if (%latest_date) {
8234                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8235                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8236                 }
8237                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8238         } elsif ($format eq 'atom') {
8239                 print <<XML;
8240 <feed xmlns="http://www.w3.org/2005/Atom">
8241 XML
8242                 print "<title>$title</title>\n" .
8243                       "<subtitle>$descr</subtitle>\n" .
8244                       '<link rel="alternate" type="text/html" href="' .
8245                       $alt_url . '" />' . "\n" .
8246                       '<link rel="self" type="' . $content_type . '" href="' .
8247                       $cgi->self_url() . '" />' . "\n" .
8248                       "<id>" . href(-full=>1) . "</id>\n" .
8249                       # use project owner for feed author
8250                       "<author><name>$owner</name></author>\n";
8251                 if (defined $favicon) {
8252                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8253                 }
8254                 if (defined $logo) {
8255                         # not twice as wide as tall: 72 x 27 pixels
8256                         print "<logo>" . esc_url($logo) . "</logo>\n";
8257                 }
8258                 if (! %latest_date) {
8259                         # dummy date to keep the feed valid until commits trickle in:
8260                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8261                 } else {
8262                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8263                 }
8264                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8265         }
8266
8267         # contents
8268         for (my $i = 0; $i <= $#commitlist; $i++) {
8269                 my %co = %{$commitlist[$i]};
8270                 my $commit = $co{'id'};
8271                 # we read 150, we always show 30 and the ones more recent than 48 hours
8272                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8273                         last;
8274                 }
8275                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8276
8277                 # get list of changed files
8278                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8279                         $co{'parent'} || "--root",
8280                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8281                         or next;
8282                 my @difftree = map { chomp; $_ } <$fd>;
8283                 close $fd
8284                         or next;
8285
8286                 # print element (entry, item)
8287                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8288                 if ($format eq 'rss') {
8289                         print "<item>\n" .
8290                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8291                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8292                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8293                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8294                               "<link>$co_url</link>\n" .
8295                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8296                               "<content:encoded>" .
8297                               "<![CDATA[\n";
8298                 } elsif ($format eq 'atom') {
8299                         print "<entry>\n" .
8300                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8301                               "<updated>$cd{'iso-8601'}</updated>\n" .
8302                               "<author>\n" .
8303                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8304                         if ($co{'author_email'}) {
8305                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8306                         }
8307                         print "</author>\n" .
8308                               # use committer for contributor
8309                               "<contributor>\n" .
8310                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8311                         if ($co{'committer_email'}) {
8312                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8313                         }
8314                         print "</contributor>\n" .
8315                               "<published>$cd{'iso-8601'}</published>\n" .
8316                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8317                               "<id>$co_url</id>\n" .
8318                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8319                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8320                 }
8321                 my $comment = $co{'comment'};
8322                 print "<pre>\n";
8323                 foreach my $line (@$comment) {
8324                         $line = esc_html($line);
8325                         print "$line\n";
8326                 }
8327                 print "</pre><ul>\n";
8328                 foreach my $difftree_line (@difftree) {
8329                         my %difftree = parse_difftree_raw_line($difftree_line);
8330                         next if !$difftree{'from_id'};
8331
8332                         my $file = $difftree{'file'} || $difftree{'to_file'};
8333
8334                         print "<li>" .
8335                               "[" .
8336                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8337                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8338                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8339                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8340                                       -title => "diff"}, 'D');
8341                         if ($have_blame) {
8342                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8343                                                              file_name=>$file, hash_base=>$commit),
8344                                               -title => "blame"}, 'B');
8345                         }
8346                         # if this is not a feed of a file history
8347                         if (!defined $file_name || $file_name ne $file) {
8348                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8349                                                              file_name=>$file, hash=>$commit),
8350                                               -title => "history"}, 'H');
8351                         }
8352                         $file = esc_path($file);
8353                         print "] ".
8354                               "$file</li>\n";
8355                 }
8356                 if ($format eq 'rss') {
8357                         print "</ul>]]>\n" .
8358                               "</content:encoded>\n" .
8359                               "</item>\n";
8360                 } elsif ($format eq 'atom') {
8361                         print "</ul>\n</div>\n" .
8362                               "</content>\n" .
8363                               "</entry>\n";
8364                 }
8365         }
8366
8367         # end of feed
8368         if ($format eq 'rss') {
8369                 print "</channel>\n</rss>\n";
8370         } elsif ($format eq 'atom') {
8371                 print "</feed>\n";
8372         }
8373 }
8374
8375 sub git_rss {
8376         git_feed('rss');
8377 }
8378
8379 sub git_atom {
8380         git_feed('atom');
8381 }
8382
8383 sub git_opml {
8384         my @list = git_get_projects_list($project_filter, $strict_export);
8385         if (!@list) {
8386                 die_error(404, "No projects found");
8387         }
8388
8389         print $cgi->header(
8390                 -type => 'text/xml',
8391                 -charset => 'utf-8',
8392                 -content_disposition => 'inline; filename="opml.xml"');
8393
8394         my $title = esc_html($site_name);
8395         my $filter = " within subdirectory ";
8396         if (defined $project_filter) {
8397                 $filter .= esc_html($project_filter);
8398         } else {
8399                 $filter = "";
8400         }
8401         print <<XML;
8402 <?xml version="1.0" encoding="utf-8"?>
8403 <opml version="1.0">
8404 <head>
8405   <title>$title OPML Export$filter</title>
8406 </head>
8407 <body>
8408 <outline text="git RSS feeds">
8409 XML
8410
8411         foreach my $pr (@list) {
8412                 my %proj = %$pr;
8413                 my $head = git_get_head_hash($proj{'path'});
8414                 if (!defined $head) {
8415                         next;
8416                 }
8417                 $git_dir = "$projectroot/$proj{'path'}";
8418                 my %co = parse_commit($head);
8419                 if (!%co) {
8420                         next;
8421                 }
8422
8423                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8424                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8425                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8426                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8427         }
8428         print <<XML;
8429 </outline>
8430 </body>
8431 </opml>
8432 XML
8433 }