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