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

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