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+xhtml (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{
2041         \b
2042         (
2043             # The output of "git describe", e.g. v2.10.0-297-gf6727b0
2044             # or hadoop-20160921-113441-20-g094fb7d
2045             (?<!-) # see strbuf_check_tag_ref(). Tags can't start with -
2046             [A-Za-z0-9.-]+
2047             (?!\.) # refs can't end with ".", see check_refname_format()
2048             -g[0-9a-fA-F]{7,40}
2049             |
2050             # Just a normal looking Git SHA1
2051             [0-9a-fA-F]{7,40}
2052         )
2053         \b
2054     }{
2055                 $cgi->a({-href => href(action=>"object", hash=>$1),
2056                                         -class => "text"}, $1);
2057         }egx;
2058
2059         return $line;
2060 }
2061
2062 # format marker of refs pointing to given object
2063
2064 # the destination action is chosen based on object type and current context:
2065 # - for annotated tags, we choose the tag view unless it's the current view
2066 #   already, in which case we go to shortlog view
2067 # - for other refs, we keep the current view if we're in history, shortlog or
2068 #   log view, and select shortlog otherwise
2069 sub format_ref_marker {
2070         my ($refs, $id) = @_;
2071         my $markers = '';
2072
2073         if (defined $refs->{$id}) {
2074                 foreach my $ref (@{$refs->{$id}}) {
2075                         # this code exploits the fact that non-lightweight tags are the
2076                         # only indirect objects, and that they are the only objects for which
2077                         # we want to use tag instead of shortlog as action
2078                         my ($type, $name) = qw();
2079                         my $indirect = ($ref =~ s/\^\{\}$//);
2080                         # e.g. tags/v2.6.11 or heads/next
2081                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2082                                 $type = $1;
2083                                 $name = $2;
2084                         } else {
2085                                 $type = "ref";
2086                                 $name = $ref;
2087                         }
2088
2089                         my $class = $type;
2090                         $class .= " indirect" if $indirect;
2091
2092                         my $dest_action = "shortlog";
2093
2094                         if ($indirect) {
2095                                 $dest_action = "tag" unless $action eq "tag";
2096                         } elsif ($action =~ /^(history|(short)?log)$/) {
2097                                 $dest_action = $action;
2098                         }
2099
2100                         my $dest = "";
2101                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2102                         $dest .= $ref;
2103
2104                         my $link = $cgi->a({
2105                                 -href => href(
2106                                         action=>$dest_action,
2107                                         hash=>$dest
2108                                 )}, esc_html($name));
2109
2110                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2111                                 $link . "</span>";
2112                 }
2113         }
2114
2115         if ($markers) {
2116                 return ' <span class="refs">'. $markers . '</span>';
2117         } else {
2118                 return "";
2119         }
2120 }
2121
2122 # format, perhaps shortened and with markers, title line
2123 sub format_subject_html {
2124         my ($long, $short, $href, $extra) = @_;
2125         $extra = '' unless defined($extra);
2126
2127         if (length($short) < length($long)) {
2128                 $long =~ s/[[:cntrl:]]/?/g;
2129                 return $cgi->a({-href => $href, -class => "list subject",
2130                                 -title => to_utf8($long)},
2131                        esc_html($short)) . $extra;
2132         } else {
2133                 return $cgi->a({-href => $href, -class => "list subject"},
2134                        esc_html($long)) . $extra;
2135         }
2136 }
2137
2138 # Rather than recomputing the url for an email multiple times, we cache it
2139 # after the first hit. This gives a visible benefit in views where the avatar
2140 # for the same email is used repeatedly (e.g. shortlog).
2141 # The cache is shared by all avatar engines (currently gravatar only), which
2142 # are free to use it as preferred. Since only one avatar engine is used for any
2143 # given page, there's no risk for cache conflicts.
2144 our %avatar_cache = ();
2145
2146 # Compute the picon url for a given email, by using the picon search service over at
2147 # http://www.cs.indiana.edu/picons/search.html
2148 sub picon_url {
2149         my $email = lc shift;
2150         if (!$avatar_cache{$email}) {
2151                 my ($user, $domain) = split('@', $email);
2152                 $avatar_cache{$email} =
2153                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2154                         "$domain/$user/" .
2155                         "users+domains+unknown/up/single";
2156         }
2157         return $avatar_cache{$email};
2158 }
2159
2160 # Compute the gravatar url for a given email, if it's not in the cache already.
2161 # Gravatar stores only the part of the URL before the size, since that's the
2162 # one computationally more expensive. This also allows reuse of the cache for
2163 # different sizes (for this particular engine).
2164 sub gravatar_url {
2165         my $email = lc shift;
2166         my $size = shift;
2167         $avatar_cache{$email} ||=
2168                 "//www.gravatar.com/avatar/" .
2169                         Digest::MD5::md5_hex($email) . "?s=";
2170         return $avatar_cache{$email} . $size;
2171 }
2172
2173 # Insert an avatar for the given $email at the given $size if the feature
2174 # is enabled.
2175 sub git_get_avatar {
2176         my ($email, %opts) = @_;
2177         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2178         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2179         $opts{-size} ||= 'default';
2180         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2181         my $url = "";
2182         if ($git_avatar eq 'gravatar') {
2183                 $url = gravatar_url($email, $size);
2184         } elsif ($git_avatar eq 'picon') {
2185                 $url = picon_url($email);
2186         }
2187         # Other providers can be added by extending the if chain, defining $url
2188         # as needed. If no variant puts something in $url, we assume avatars
2189         # are completely disabled/unavailable.
2190         if ($url) {
2191                 return $pre_white .
2192                        "<img width=\"$size\" " .
2193                             "class=\"avatar\" " .
2194                             "src=\"".esc_url($url)."\" " .
2195                             "alt=\"\" " .
2196                        "/>" . $post_white;
2197         } else {
2198                 return "";
2199         }
2200 }
2201
2202 sub format_search_author {
2203         my ($author, $searchtype, $displaytext) = @_;
2204         my $have_search = gitweb_check_feature('search');
2205
2206         if ($have_search) {
2207                 my $performed = "";
2208                 if ($searchtype eq 'author') {
2209                         $performed = "authored";
2210                 } elsif ($searchtype eq 'committer') {
2211                         $performed = "committed";
2212                 }
2213
2214                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2215                                 searchtext=>$author,
2216                                 searchtype=>$searchtype), class=>"list",
2217                                 title=>"Search for commits $performed by $author"},
2218                                 $displaytext);
2219
2220         } else {
2221                 return $displaytext;
2222         }
2223 }
2224
2225 # format the author name of the given commit with the given tag
2226 # the author name is chopped and escaped according to the other
2227 # optional parameters (see chop_str).
2228 sub format_author_html {
2229         my $tag = shift;
2230         my $co = shift;
2231         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2232         return "<$tag class=\"author\">" .
2233                format_search_author($co->{'author_name'}, "author",
2234                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2235                        $author) .
2236                "</$tag>";
2237 }
2238
2239 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2240 sub format_git_diff_header_line {
2241         my $line = shift;
2242         my $diffinfo = shift;
2243         my ($from, $to) = @_;
2244
2245         if ($diffinfo->{'nparents'}) {
2246                 # combined diff
2247                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2248                 if ($to->{'href'}) {
2249                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2250                                          esc_path($to->{'file'}));
2251                 } else { # file was deleted (no href)
2252                         $line .= esc_path($to->{'file'});
2253                 }
2254         } else {
2255                 # "ordinary" diff
2256                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2257                 if ($from->{'href'}) {
2258                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2259                                          'a/' . esc_path($from->{'file'}));
2260                 } else { # file was added (no href)
2261                         $line .= 'a/' . esc_path($from->{'file'});
2262                 }
2263                 $line .= ' ';
2264                 if ($to->{'href'}) {
2265                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2266                                          'b/' . esc_path($to->{'file'}));
2267                 } else { # file was deleted
2268                         $line .= 'b/' . esc_path($to->{'file'});
2269                 }
2270         }
2271
2272         return "<div class=\"diff header\">$line</div>\n";
2273 }
2274
2275 # format extended diff header line, before patch itself
2276 sub format_extended_diff_header_line {
2277         my $line = shift;
2278         my $diffinfo = shift;
2279         my ($from, $to) = @_;
2280
2281         # match <path>
2282         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2283                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2284                                        esc_path($from->{'file'}));
2285         }
2286         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2287                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2288                                  esc_path($to->{'file'}));
2289         }
2290         # match single <mode>
2291         if ($line =~ m/\s(\d{6})$/) {
2292                 $line .= '<span class="info"> (' .
2293                          file_type_long($1) .
2294                          ')</span>';
2295         }
2296         # match <hash>
2297         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2298                 # can match only for combined diff
2299                 $line = 'index ';
2300                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2301                         if ($from->{'href'}[$i]) {
2302                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2303                                                   -class=>"hash"},
2304                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2305                         } else {
2306                                 $line .= '0' x 7;
2307                         }
2308                         # separator
2309                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2310                 }
2311                 $line .= '..';
2312                 if ($to->{'href'}) {
2313                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2314                                          substr($diffinfo->{'to_id'},0,7));
2315                 } else {
2316                         $line .= '0' x 7;
2317                 }
2318
2319         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2320                 # can match only for ordinary diff
2321                 my ($from_link, $to_link);
2322                 if ($from->{'href'}) {
2323                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2324                                              substr($diffinfo->{'from_id'},0,7));
2325                 } else {
2326                         $from_link = '0' x 7;
2327                 }
2328                 if ($to->{'href'}) {
2329                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2330                                            substr($diffinfo->{'to_id'},0,7));
2331                 } else {
2332                         $to_link = '0' x 7;
2333                 }
2334                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2335                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2336         }
2337
2338         return $line . "<br/>\n";
2339 }
2340
2341 # format from-file/to-file diff header
2342 sub format_diff_from_to_header {
2343         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2344         my $line;
2345         my $result = '';
2346
2347         $line = $from_line;
2348         #assert($line =~ m/^---/) if DEBUG;
2349         # no extra formatting for "^--- /dev/null"
2350         if (! $diffinfo->{'nparents'}) {
2351                 # ordinary (single parent) diff
2352                 if ($line =~ m!^--- "?a/!) {
2353                         if ($from->{'href'}) {
2354                                 $line = '--- a/' .
2355                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2356                                                 esc_path($from->{'file'}));
2357                         } else {
2358                                 $line = '--- a/' .
2359                                         esc_path($from->{'file'});
2360                         }
2361                 }
2362                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2363
2364         } else {
2365                 # combined diff (merge commit)
2366                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2367                         if ($from->{'href'}[$i]) {
2368                                 $line = '--- ' .
2369                                         $cgi->a({-href=>href(action=>"blobdiff",
2370                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2371                                                              hash_parent_base=>$parents[$i],
2372                                                              file_parent=>$from->{'file'}[$i],
2373                                                              hash=>$diffinfo->{'to_id'},
2374                                                              hash_base=>$hash,
2375                                                              file_name=>$to->{'file'}),
2376                                                  -class=>"path",
2377                                                  -title=>"diff" . ($i+1)},
2378                                                 $i+1) .
2379                                         '/' .
2380                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2381                                                 esc_path($from->{'file'}[$i]));
2382                         } else {
2383                                 $line = '--- /dev/null';
2384                         }
2385                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2386                 }
2387         }
2388
2389         $line = $to_line;
2390         #assert($line =~ m/^\+\+\+/) if DEBUG;
2391         # no extra formatting for "^+++ /dev/null"
2392         if ($line =~ m!^\+\+\+ "?b/!) {
2393                 if ($to->{'href'}) {
2394                         $line = '+++ b/' .
2395                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2396                                         esc_path($to->{'file'}));
2397                 } else {
2398                         $line = '+++ b/' .
2399                                 esc_path($to->{'file'});
2400                 }
2401         }
2402         $result .= qq!<div class="diff to_file">$line</div>\n!;
2403
2404         return $result;
2405 }
2406
2407 # create note for patch simplified by combined diff
2408 sub format_diff_cc_simplified {
2409         my ($diffinfo, @parents) = @_;
2410         my $result = '';
2411
2412         $result .= "<div class=\"diff header\">" .
2413                    "diff --cc ";
2414         if (!is_deleted($diffinfo)) {
2415                 $result .= $cgi->a({-href => href(action=>"blob",
2416                                                   hash_base=>$hash,
2417                                                   hash=>$diffinfo->{'to_id'},
2418                                                   file_name=>$diffinfo->{'to_file'}),
2419                                     -class => "path"},
2420                                    esc_path($diffinfo->{'to_file'}));
2421         } else {
2422                 $result .= esc_path($diffinfo->{'to_file'});
2423         }
2424         $result .= "</div>\n" . # class="diff header"
2425                    "<div class=\"diff nodifferences\">" .
2426                    "Simple merge" .
2427                    "</div>\n"; # class="diff nodifferences"
2428
2429         return $result;
2430 }
2431
2432 sub diff_line_class {
2433         my ($line, $from, $to) = @_;
2434
2435         # ordinary diff
2436         my $num_sign = 1;
2437         # combined diff
2438         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2439                 $num_sign = scalar @{$from->{'href'}};
2440         }
2441
2442         my @diff_line_classifier = (
2443                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2444                 { regexp => qr/^\\/,               class => "incomplete"  },
2445                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2446                 # classifier for context must come before classifier add/rem,
2447                 # or we would have to use more complicated regexp, for example
2448                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2449                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2450                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2451         );
2452         for my $clsfy (@diff_line_classifier) {
2453                 return $clsfy->{'class'}
2454                         if ($line =~ $clsfy->{'regexp'});
2455         }
2456
2457         # fallback
2458         return "";
2459 }
2460
2461 # assumes that $from and $to are defined and correctly filled,
2462 # and that $line holds a line of chunk header for unified diff
2463 sub format_unidiff_chunk_header {
2464         my ($line, $from, $to) = @_;
2465
2466         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2467                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2468
2469         $from_lines = 0 unless defined $from_lines;
2470         $to_lines   = 0 unless defined $to_lines;
2471
2472         if ($from->{'href'}) {
2473                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2474                                      -class=>"list"}, $from_text);
2475         }
2476         if ($to->{'href'}) {
2477                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2478                                      -class=>"list"}, $to_text);
2479         }
2480         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2481                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2482         return $line;
2483 }
2484
2485 # assumes that $from and $to are defined and correctly filled,
2486 # and that $line holds a line of chunk header for combined diff
2487 sub format_cc_diff_chunk_header {
2488         my ($line, $from, $to) = @_;
2489
2490         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2491         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2492
2493         @from_text = split(' ', $ranges);
2494         for (my $i = 0; $i < @from_text; ++$i) {
2495                 ($from_start[$i], $from_nlines[$i]) =
2496                         (split(',', substr($from_text[$i], 1)), 0);
2497         }
2498
2499         $to_text   = pop @from_text;
2500         $to_start  = pop @from_start;
2501         $to_nlines = pop @from_nlines;
2502
2503         $line = "<span class=\"chunk_info\">$prefix ";
2504         for (my $i = 0; $i < @from_text; ++$i) {
2505                 if ($from->{'href'}[$i]) {
2506                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2507                                           -class=>"list"}, $from_text[$i]);
2508                 } else {
2509                         $line .= $from_text[$i];
2510                 }
2511                 $line .= " ";
2512         }
2513         if ($to->{'href'}) {
2514                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2515                                   -class=>"list"}, $to_text);
2516         } else {
2517                 $line .= $to_text;
2518         }
2519         $line .= " $prefix</span>" .
2520                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2521         return $line;
2522 }
2523
2524 # process patch (diff) line (not to be used for diff headers),
2525 # returning HTML-formatted (but not wrapped) line.
2526 # If the line is passed as a reference, it is treated as HTML and not
2527 # esc_html()'ed.
2528 sub format_diff_line {
2529         my ($line, $diff_class, $from, $to) = @_;
2530
2531         if (ref($line)) {
2532                 $line = $$line;
2533         } else {
2534                 chomp $line;
2535                 $line = untabify($line);
2536
2537                 if ($from && $to && $line =~ m/^\@{2} /) {
2538                         $line = format_unidiff_chunk_header($line, $from, $to);
2539                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2540                         $line = format_cc_diff_chunk_header($line, $from, $to);
2541                 } else {
2542                         $line = esc_html($line, -nbsp=>1);
2543                 }
2544         }
2545
2546         my $diff_classes = "diff";
2547         $diff_classes .= " $diff_class" if ($diff_class);
2548         $line = "<div class=\"$diff_classes\">$line</div>\n";
2549
2550         return $line;
2551 }
2552
2553 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2554 # linked.  Pass the hash of the tree/commit to snapshot.
2555 sub format_snapshot_links {
2556         my ($hash) = @_;
2557         my $num_fmts = @snapshot_fmts;
2558         if ($num_fmts > 1) {
2559                 # A parenthesized list of links bearing format names.
2560                 # e.g. "snapshot (_tar.gz_ _zip_)"
2561                 return "snapshot (" . join(' ', map
2562                         $cgi->a({
2563                                 -href => href(
2564                                         action=>"snapshot",
2565                                         hash=>$hash,
2566                                         snapshot_format=>$_
2567                                 )
2568                         }, $known_snapshot_formats{$_}{'display'})
2569                 , @snapshot_fmts) . ")";
2570         } elsif ($num_fmts == 1) {
2571                 # A single "snapshot" link whose tooltip bears the format name.
2572                 # i.e. "_snapshot_"
2573                 my ($fmt) = @snapshot_fmts;
2574                 return
2575                         $cgi->a({
2576                                 -href => href(
2577                                         action=>"snapshot",
2578                                         hash=>$hash,
2579                                         snapshot_format=>$fmt
2580                                 ),
2581                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2582                         }, "snapshot");
2583         } else { # $num_fmts == 0
2584                 return undef;
2585         }
2586 }
2587
2588 ## ......................................................................
2589 ## functions returning values to be passed, perhaps after some
2590 ## transformation, to other functions; e.g. returning arguments to href()
2591
2592 # returns hash to be passed to href to generate gitweb URL
2593 # in -title key it returns description of link
2594 sub get_feed_info {
2595         my $format = shift || 'Atom';
2596         my %res = (action => lc($format));
2597         my $matched_ref = 0;
2598
2599         # feed links are possible only for project views
2600         return unless (defined $project);
2601         # some views should link to OPML, or to generic project feed,
2602         # or don't have specific feed yet (so they should use generic)
2603         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2604
2605         my $branch = undef;
2606         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2607         # (fullname) to differentiate from tag links; this also makes
2608         # possible to detect branch links
2609         for my $ref (get_branch_refs()) {
2610                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2611                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2612                         $branch = $1;
2613                         $matched_ref = $ref;
2614                         last;
2615                 }
2616         }
2617         # find log type for feed description (title)
2618         my $type = 'log';
2619         if (defined $file_name) {
2620                 $type  = "history of $file_name";
2621                 $type .= "/" if ($action eq 'tree');
2622                 $type .= " on '$branch'" if (defined $branch);
2623         } else {
2624                 $type = "log of $branch" if (defined $branch);
2625         }
2626
2627         $res{-title} = $type;
2628         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2629         $res{'file_name'} = $file_name;
2630
2631         return %res;
2632 }
2633
2634 ## ----------------------------------------------------------------------
2635 ## git utility subroutines, invoking git commands
2636
2637 # returns path to the core git executable and the --git-dir parameter as list
2638 sub git_cmd {
2639         $number_of_git_cmds++;
2640         return $GIT, '--git-dir='.$git_dir;
2641 }
2642
2643 # quote the given arguments for passing them to the shell
2644 # quote_command("command", "arg 1", "arg with ' and ! characters")
2645 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2646 # Try to avoid using this function wherever possible.
2647 sub quote_command {
2648         return join(' ',
2649                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2650 }
2651
2652 # get HEAD ref of given project as hash
2653 sub git_get_head_hash {
2654         return git_get_full_hash(shift, 'HEAD');
2655 }
2656
2657 sub git_get_full_hash {
2658         return git_get_hash(@_);
2659 }
2660
2661 sub git_get_short_hash {
2662         return git_get_hash(@_, '--short=7');
2663 }
2664
2665 sub git_get_hash {
2666         my ($project, $hash, @options) = @_;
2667         my $o_git_dir = $git_dir;
2668         my $retval = undef;
2669         $git_dir = "$projectroot/$project";
2670         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2671             '--verify', '-q', @options, $hash) {
2672                 $retval = <$fd>;
2673                 chomp $retval if defined $retval;
2674                 close $fd;
2675         }
2676         if (defined $o_git_dir) {
2677                 $git_dir = $o_git_dir;
2678         }
2679         return $retval;
2680 }
2681
2682 # get type of given object
2683 sub git_get_type {
2684         my $hash = shift;
2685
2686         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2687         my $type = <$fd>;
2688         close $fd or return;
2689         chomp $type;
2690         return $type;
2691 }
2692
2693 # repository configuration
2694 our $config_file = '';
2695 our %config;
2696
2697 # store multiple values for single key as anonymous array reference
2698 # single values stored directly in the hash, not as [ <value> ]
2699 sub hash_set_multi {
2700         my ($hash, $key, $value) = @_;
2701
2702         if (!exists $hash->{$key}) {
2703                 $hash->{$key} = $value;
2704         } elsif (!ref $hash->{$key}) {
2705                 $hash->{$key} = [ $hash->{$key}, $value ];
2706         } else {
2707                 push @{$hash->{$key}}, $value;
2708         }
2709 }
2710
2711 # return hash of git project configuration
2712 # optionally limited to some section, e.g. 'gitweb'
2713 sub git_parse_project_config {
2714         my $section_regexp = shift;
2715         my %config;
2716
2717         local $/ = "\0";
2718
2719         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2720                 or return;
2721
2722         while (my $keyval = <$fh>) {
2723                 chomp $keyval;
2724                 my ($key, $value) = split(/\n/, $keyval, 2);
2725
2726                 hash_set_multi(\%config, $key, $value)
2727                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2728         }
2729         close $fh;
2730
2731         return %config;
2732 }
2733
2734 # convert config value to boolean: 'true' or 'false'
2735 # no value, number > 0, 'true' and 'yes' values are true
2736 # rest of values are treated as false (never as error)
2737 sub config_to_bool {
2738         my $val = shift;
2739
2740         return 1 if !defined $val;             # section.key
2741
2742         # strip leading and trailing whitespace
2743         $val =~ s/^\s+//;
2744         $val =~ s/\s+$//;
2745
2746         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2747                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2748 }
2749
2750 # convert config value to simple decimal number
2751 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2752 # to be multiplied by 1024, 1048576, or 1073741824
2753 sub config_to_int {
2754         my $val = shift;
2755
2756         # strip leading and trailing whitespace
2757         $val =~ s/^\s+//;
2758         $val =~ s/\s+$//;
2759
2760         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2761                 $unit = lc($unit);
2762                 # unknown unit is treated as 1
2763                 return $num * ($unit eq 'g' ? 1073741824 :
2764                                $unit eq 'm' ?    1048576 :
2765                                $unit eq 'k' ?       1024 : 1);
2766         }
2767         return $val;
2768 }
2769
2770 # convert config value to array reference, if needed
2771 sub config_to_multi {
2772         my $val = shift;
2773
2774         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2775 }
2776
2777 sub git_get_project_config {
2778         my ($key, $type) = @_;
2779
2780         return unless defined $git_dir;
2781
2782         # key sanity check
2783         return unless ($key);
2784         # only subsection, if exists, is case sensitive,
2785         # and not lowercased by 'git config -z -l'
2786         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2787                 $lo =~ s/_//g;
2788                 $key = join(".", lc($hi), $mi, lc($lo));
2789                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2790         } else {
2791                 $key = lc($key);
2792                 $key =~ s/_//g;
2793                 return if ($key =~ /\W/);
2794         }
2795         $key =~ s/^gitweb\.//;
2796
2797         # type sanity check
2798         if (defined $type) {
2799                 $type =~ s/^--//;
2800                 $type = undef
2801                         unless ($type eq 'bool' || $type eq 'int');
2802         }
2803
2804         # get config
2805         if (!defined $config_file ||
2806             $config_file ne "$git_dir/config") {
2807                 %config = git_parse_project_config('gitweb');
2808                 $config_file = "$git_dir/config";
2809         }
2810
2811         # check if config variable (key) exists
2812         return unless exists $config{"gitweb.$key"};
2813
2814         # ensure given type
2815         if (!defined $type) {
2816                 return $config{"gitweb.$key"};
2817         } elsif ($type eq 'bool') {
2818                 # backward compatibility: 'git config --bool' returns true/false
2819                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2820         } elsif ($type eq 'int') {
2821                 return config_to_int($config{"gitweb.$key"});
2822         }
2823         return $config{"gitweb.$key"};
2824 }
2825
2826 # get hash of given path at given ref
2827 sub git_get_hash_by_path {
2828         my $base = shift;
2829         my $path = shift || return undef;
2830         my $type = shift;
2831
2832         $path =~ s,/+$,,;
2833
2834         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2835                 or die_error(500, "Open git-ls-tree failed");
2836         my $line = <$fd>;
2837         close $fd or return undef;
2838
2839         if (!defined $line) {
2840                 # there is no tree or hash given by $path at $base
2841                 return undef;
2842         }
2843
2844         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2845         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2846         if (defined $type && $type ne $2) {
2847                 # type doesn't match
2848                 return undef;
2849         }
2850         return $3;
2851 }
2852
2853 # get path of entry with given hash at given tree-ish (ref)
2854 # used to get 'from' filename for combined diff (merge commit) for renames
2855 sub git_get_path_by_hash {
2856         my $base = shift || return;
2857         my $hash = shift || return;
2858
2859         local $/ = "\0";
2860
2861         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2862                 or return undef;
2863         while (my $line = <$fd>) {
2864                 chomp $line;
2865
2866                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2867                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2868                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2869                         close $fd;
2870                         return $1;
2871                 }
2872         }
2873         close $fd;
2874         return undef;
2875 }
2876
2877 ## ......................................................................
2878 ## git utility functions, directly accessing git repository
2879
2880 # get the value of config variable either from file named as the variable
2881 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2882 # configuration variable in the repository config file.
2883 sub git_get_file_or_project_config {
2884         my ($path, $name) = @_;
2885
2886         $git_dir = "$projectroot/$path";
2887         open my $fd, '<', "$git_dir/$name"
2888                 or return git_get_project_config($name);
2889         my $conf = <$fd>;
2890         close $fd;
2891         if (defined $conf) {
2892                 chomp $conf;
2893         }
2894         return $conf;
2895 }
2896
2897 sub git_get_project_description {
2898         my $path = shift;
2899         return git_get_file_or_project_config($path, 'description');
2900 }
2901
2902 sub git_get_project_category {
2903         my $path = shift;
2904         return git_get_file_or_project_config($path, 'category');
2905 }
2906
2907
2908 # supported formats:
2909 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2910 #   - if its contents is a number, use it as tag weight,
2911 #   - otherwise add a tag with weight 1
2912 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2913 #   the same value multiple times increases tag weight
2914 # * `gitweb.ctag' multi-valued repo config variable
2915 sub git_get_project_ctags {
2916         my $project = shift;
2917         my $ctags = {};
2918
2919         $git_dir = "$projectroot/$project";
2920         if (opendir my $dh, "$git_dir/ctags") {
2921                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2922                 foreach my $tagfile (@files) {
2923                         open my $ct, '<', $tagfile
2924                                 or next;
2925                         my $val = <$ct>;
2926                         chomp $val if $val;
2927                         close $ct;
2928
2929                         (my $ctag = $tagfile) =~ s#.*/##;
2930                         if ($val =~ /^\d+$/) {
2931                                 $ctags->{$ctag} = $val;
2932                         } else {
2933                                 $ctags->{$ctag} = 1;
2934                         }
2935                 }
2936                 closedir $dh;
2937
2938         } elsif (open my $fh, '<', "$git_dir/ctags") {
2939                 while (my $line = <$fh>) {
2940                         chomp $line;
2941                         $ctags->{$line}++ if $line;
2942                 }
2943                 close $fh;
2944
2945         } else {
2946                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2947                 foreach my $tag (@$taglist) {
2948                         $ctags->{$tag}++;
2949                 }
2950         }
2951
2952         return $ctags;
2953 }
2954
2955 # return hash, where keys are content tags ('ctags'),
2956 # and values are sum of weights of given tag in every project
2957 sub git_gather_all_ctags {
2958         my $projects = shift;
2959         my $ctags = {};
2960
2961         foreach my $p (@$projects) {
2962                 foreach my $ct (keys %{$p->{'ctags'}}) {
2963                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2964                 }
2965         }
2966
2967         return $ctags;
2968 }
2969
2970 sub git_populate_project_tagcloud {
2971         my $ctags = shift;
2972
2973         # First, merge different-cased tags; tags vote on casing
2974         my %ctags_lc;
2975         foreach (keys %$ctags) {
2976                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2977                 if (not $ctags_lc{lc $_}->{topcount}
2978                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2979                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2980                         $ctags_lc{lc $_}->{topname} = $_;
2981                 }
2982         }
2983
2984         my $cloud;
2985         my $matched = $input_params{'ctag'};
2986         if (eval { require HTML::TagCloud; 1; }) {
2987                 $cloud = HTML::TagCloud->new;
2988                 foreach my $ctag (sort keys %ctags_lc) {
2989                         # Pad the title with spaces so that the cloud looks
2990                         # less crammed.
2991                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2992                         $title =~ s/ /&nbsp;/g;
2993                         $title =~ s/^/&nbsp;/g;
2994                         $title =~ s/$/&nbsp;/g;
2995                         if (defined $matched && $matched eq $ctag) {
2996                                 $title = qq(<span class="match">$title</span>);
2997                         }
2998                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2999                                     $ctags_lc{$ctag}->{count});
3000                 }
3001         } else {
3002                 $cloud = {};
3003                 foreach my $ctag (keys %ctags_lc) {
3004                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3005                         if (defined $matched && $matched eq $ctag) {
3006                                 $title = qq(<span class="match">$title</span>);
3007                         }
3008                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3009                         $cloud->{$ctag}{ctag} =
3010                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
3011                 }
3012         }
3013         return $cloud;
3014 }
3015
3016 sub git_show_project_tagcloud {
3017         my ($cloud, $count) = @_;
3018         if (ref $cloud eq 'HTML::TagCloud') {
3019                 return $cloud->html_and_css($count);
3020         } else {
3021                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3022                 return
3023                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3024                         join (', ', map {
3025                                 $cloud->{$_}->{'ctag'}
3026                         } splice(@tags, 0, $count)) .
3027                         '</div>';
3028         }
3029 }
3030
3031 sub git_get_project_url_list {
3032         my $path = shift;
3033
3034         $git_dir = "$projectroot/$path";
3035         open my $fd, '<', "$git_dir/cloneurl"
3036                 or return wantarray ?
3037                 @{ config_to_multi(git_get_project_config('url')) } :
3038                    config_to_multi(git_get_project_config('url'));
3039         my @git_project_url_list = map { chomp; $_ } <$fd>;
3040         close $fd;
3041
3042         return wantarray ? @git_project_url_list : \@git_project_url_list;
3043 }
3044
3045 sub git_get_projects_list {
3046         my $filter = shift || '';
3047         my $paranoid = shift;
3048         my @list;
3049
3050         if (-d $projects_list) {
3051                 # search in directory
3052                 my $dir = $projects_list;
3053                 # remove the trailing "/"
3054                 $dir =~ s!/+$!!;
3055                 my $pfxlen = length("$dir");
3056                 my $pfxdepth = ($dir =~ tr!/!!);
3057                 # when filtering, search only given subdirectory
3058                 if ($filter && !$paranoid) {
3059                         $dir .= "/$filter";
3060                         $dir =~ s!/+$!!;
3061                 }
3062
3063                 File::Find::find({
3064                         follow_fast => 1, # follow symbolic links
3065                         follow_skip => 2, # ignore duplicates
3066                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3067                         wanted => sub {
3068                                 # global variables
3069                                 our $project_maxdepth;
3070                                 our $projectroot;
3071                                 # skip project-list toplevel, if we get it.
3072                                 return if (m!^[/.]$!);
3073                                 # only directories can be git repositories
3074                                 return unless (-d $_);
3075                                 # don't traverse too deep (Find is super slow on os x)
3076                                 # $project_maxdepth excludes depth of $projectroot
3077                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3078                                         $File::Find::prune = 1;
3079                                         return;
3080                                 }
3081
3082                                 my $path = substr($File::Find::name, $pfxlen + 1);
3083                                 # paranoidly only filter here
3084                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3085                                         next;
3086                                 }
3087                                 # we check related file in $projectroot
3088                                 if (check_export_ok("$projectroot/$path")) {
3089                                         push @list, { path => $path };
3090                                         $File::Find::prune = 1;
3091                                 }
3092                         },
3093                 }, "$dir");
3094
3095         } elsif (-f $projects_list) {
3096                 # read from file(url-encoded):
3097                 # 'git%2Fgit.git Linus+Torvalds'
3098                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3099                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3100                 open my $fd, '<', $projects_list or return;
3101         PROJECT:
3102                 while (my $line = <$fd>) {
3103                         chomp $line;
3104                         my ($path, $owner) = split ' ', $line;
3105                         $path = unescape($path);
3106                         $owner = unescape($owner);
3107                         if (!defined $path) {
3108                                 next;
3109                         }
3110                         # if $filter is rpovided, check if $path begins with $filter
3111                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3112                                 next;
3113                         }
3114                         if (check_export_ok("$projectroot/$path")) {
3115                                 my $pr = {
3116                                         path => $path
3117                                 };
3118                                 if ($owner) {
3119                                         $pr->{'owner'} = to_utf8($owner);
3120                                 }
3121                                 push @list, $pr;
3122                         }
3123                 }
3124                 close $fd;
3125         }
3126         return @list;
3127 }
3128
3129 # written with help of Tree::Trie module (Perl Artistic License, GPL compatible)
3130 # as side effects it sets 'forks' field to list of forks for forked projects
3131 sub filter_forks_from_projects_list {
3132         my $projects = shift;
3133
3134         my %trie; # prefix tree of directories (path components)
3135         # generate trie out of those directories that might contain forks
3136         foreach my $pr (@$projects) {
3137                 my $path = $pr->{'path'};
3138                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3139                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3140                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3141                 next unless (-d "$projectroot/$path"); # containing directory exists
3142                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3143
3144                 # add to trie
3145                 my @dirs = split('/', $path);
3146                 # walk the trie, until either runs out of components or out of trie
3147                 my $ref = \%trie;
3148                 while (scalar @dirs &&
3149                        exists($ref->{$dirs[0]})) {
3150                         $ref = $ref->{shift @dirs};
3151                 }
3152                 # create rest of trie structure from rest of components
3153                 foreach my $dir (@dirs) {
3154                         $ref = $ref->{$dir} = {};
3155                 }
3156                 # create end marker, store $pr as a data
3157                 $ref->{''} = $pr if (!exists $ref->{''});
3158         }
3159
3160         # filter out forks, by finding shortest prefix match for paths
3161         my @filtered;
3162  PROJECT:
3163         foreach my $pr (@$projects) {
3164                 # trie lookup
3165                 my $ref = \%trie;
3166         DIR:
3167                 foreach my $dir (split('/', $pr->{'path'})) {
3168                         if (exists $ref->{''}) {
3169                                 # found [shortest] prefix, is a fork - skip it
3170                                 push @{$ref->{''}{'forks'}}, $pr;
3171                                 next PROJECT;
3172                         }
3173                         if (!exists $ref->{$dir}) {
3174                                 # not in trie, cannot have prefix, not a fork
3175                                 push @filtered, $pr;
3176                                 next PROJECT;
3177                         }
3178                         # If the dir is there, we just walk one step down the trie.
3179                         $ref = $ref->{$dir};
3180                 }
3181                 # we ran out of trie
3182                 # (shouldn't happen: it's either no match, or end marker)
3183                 push @filtered, $pr;
3184         }
3185
3186         return @filtered;
3187 }
3188
3189 # note: fill_project_list_info must be run first,
3190 # for 'descr_long' and 'ctags' to be filled
3191 sub search_projects_list {
3192         my ($projlist, %opts) = @_;
3193         my $tagfilter  = $opts{'tagfilter'};
3194         my $search_re = $opts{'search_regexp'};
3195
3196         return @$projlist
3197                 unless ($tagfilter || $search_re);
3198
3199         # searching projects require filling to be run before it;
3200         fill_project_list_info($projlist,
3201                                $tagfilter  ? 'ctags' : (),
3202                                $search_re ? ('path', 'descr') : ());
3203         my @projects;
3204  PROJECT:
3205         foreach my $pr (@$projlist) {
3206
3207                 if ($tagfilter) {
3208                         next unless ref($pr->{'ctags'}) eq 'HASH';
3209                         next unless
3210                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3211                 }
3212
3213                 if ($search_re) {
3214                         next unless
3215                                 $pr->{'path'} =~ /$search_re/ ||
3216                                 $pr->{'descr_long'} =~ /$search_re/;
3217                 }
3218
3219                 push @projects, $pr;
3220         }
3221
3222         return @projects;
3223 }
3224
3225 our $gitweb_project_owner = undef;
3226 sub git_get_project_list_from_file {
3227
3228         return if (defined $gitweb_project_owner);
3229
3230         $gitweb_project_owner = {};
3231         # read from file (url-encoded):
3232         # 'git%2Fgit.git Linus+Torvalds'
3233         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3234         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3235         if (-f $projects_list) {
3236                 open(my $fd, '<', $projects_list);
3237                 while (my $line = <$fd>) {
3238                         chomp $line;
3239                         my ($pr, $ow) = split ' ', $line;
3240                         $pr = unescape($pr);
3241                         $ow = unescape($ow);
3242                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3243                 }
3244                 close $fd;
3245         }
3246 }
3247
3248 sub git_get_project_owner {
3249         my $project = shift;
3250         my $owner;
3251
3252         return undef unless $project;
3253         $git_dir = "$projectroot/$project";
3254
3255         if (!defined $gitweb_project_owner) {
3256                 git_get_project_list_from_file();
3257         }
3258
3259         if (exists $gitweb_project_owner->{$project}) {
3260                 $owner = $gitweb_project_owner->{$project};
3261         }
3262         if (!defined $owner){
3263                 $owner = git_get_project_config('owner');
3264         }
3265         if (!defined $owner) {
3266                 $owner = get_file_owner("$git_dir");
3267         }
3268
3269         return $owner;
3270 }
3271
3272 sub git_get_last_activity {
3273         my ($path) = @_;
3274         my $fd;
3275
3276         $git_dir = "$projectroot/$path";
3277         open($fd, "-|", git_cmd(), 'for-each-ref',
3278              '--format=%(committer)',
3279              '--sort=-committerdate',
3280              '--count=1',
3281              map { "refs/$_" } get_branch_refs ()) or return;
3282         my $most_recent = <$fd>;
3283         close $fd or return;
3284         if (defined $most_recent &&
3285             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3286                 my $timestamp = $1;
3287                 my $age = time - $timestamp;
3288                 return ($age, age_string($age));
3289         }
3290         return (undef, undef);
3291 }
3292
3293 # Implementation note: when a single remote is wanted, we cannot use 'git
3294 # remote show -n' because that command always work (assuming it's a remote URL
3295 # if it's not defined), and we cannot use 'git remote show' because that would
3296 # try to make a network roundtrip. So the only way to find if that particular
3297 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3298 # and when we find what we want.
3299 sub git_get_remotes_list {
3300         my $wanted = shift;
3301         my %remotes = ();
3302
3303         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3304         return unless $fd;
3305         while (my $remote = <$fd>) {
3306                 chomp $remote;
3307                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3308                 next if $wanted and not $remote eq $wanted;
3309                 my ($url, $key) = ($1, $2);
3310
3311                 $remotes{$remote} ||= { 'heads' => () };
3312                 $remotes{$remote}{$key} = $url;
3313         }
3314         close $fd or return;
3315         return wantarray ? %remotes : \%remotes;
3316 }
3317
3318 # Takes a hash of remotes as first parameter and fills it by adding the
3319 # available remote heads for each of the indicated remotes.
3320 sub fill_remote_heads {
3321         my $remotes = shift;
3322         my @heads = map { "remotes/$_" } keys %$remotes;
3323         my @remoteheads = git_get_heads_list(undef, @heads);
3324         foreach my $remote (keys %$remotes) {
3325                 $remotes->{$remote}{'heads'} = [ grep {
3326                         $_->{'name'} =~ s!^$remote/!!
3327                         } @remoteheads ];
3328         }
3329 }
3330
3331 sub git_get_references {
3332         my $type = shift || "";
3333         my %refs;
3334         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3335         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3336         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3337                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3338                 or return;
3339
3340         while (my $line = <$fd>) {
3341                 chomp $line;
3342                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3343                         if (defined $refs{$1}) {
3344                                 push @{$refs{$1}}, $2;
3345                         } else {
3346                                 $refs{$1} = [ $2 ];
3347                         }
3348                 }
3349         }
3350         close $fd or return;
3351         return \%refs;
3352 }
3353
3354 sub git_get_rev_name_tags {
3355         my $hash = shift || return undef;
3356
3357         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3358                 or return;
3359         my $name_rev = <$fd>;
3360         close $fd;
3361
3362         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3363                 return $1;
3364         } else {
3365                 # catches also '$hash undefined' output
3366                 return undef;
3367         }
3368 }
3369
3370 ## ----------------------------------------------------------------------
3371 ## parse to hash functions
3372
3373 sub parse_date {
3374         my $epoch = shift;
3375         my $tz = shift || "-0000";
3376
3377         my %date;
3378         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3379         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3380         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3381         $date{'hour'} = $hour;
3382         $date{'minute'} = $min;
3383         $date{'mday'} = $mday;
3384         $date{'day'} = $days[$wday];
3385         $date{'month'} = $months[$mon];
3386         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3387                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3388         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3389                              $mday, $months[$mon], $hour ,$min;
3390         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3391                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3392
3393         my ($tz_sign, $tz_hour, $tz_min) =
3394                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3395         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3396         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3397         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3398         $date{'hour_local'} = $hour;
3399         $date{'minute_local'} = $min;
3400         $date{'tz_local'} = $tz;
3401         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3402                                   1900+$year, $mon+1, $mday,
3403                                   $hour, $min, $sec, $tz);
3404         return %date;
3405 }
3406
3407 sub parse_tag {
3408         my $tag_id = shift;
3409         my %tag;
3410         my @comment;
3411
3412         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3413         $tag{'id'} = $tag_id;
3414         while (my $line = <$fd>) {
3415                 chomp $line;
3416                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3417                         $tag{'object'} = $1;
3418                 } elsif ($line =~ m/^type (.+)$/) {
3419                         $tag{'type'} = $1;
3420                 } elsif ($line =~ m/^tag (.+)$/) {
3421                         $tag{'name'} = $1;
3422                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3423                         $tag{'author'} = $1;
3424                         $tag{'author_epoch'} = $2;
3425                         $tag{'author_tz'} = $3;
3426                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3427                                 $tag{'author_name'}  = $1;
3428                                 $tag{'author_email'} = $2;
3429                         } else {
3430                                 $tag{'author_name'} = $tag{'author'};
3431                         }
3432                 } elsif ($line =~ m/--BEGIN/) {
3433                         push @comment, $line;
3434                         last;
3435                 } elsif ($line eq "") {
3436                         last;
3437                 }
3438         }
3439         push @comment, <$fd>;
3440         $tag{'comment'} = \@comment;
3441         close $fd or return;
3442         if (!defined $tag{'name'}) {
3443                 return
3444         };
3445         return %tag
3446 }
3447
3448 sub parse_commit_text {
3449         my ($commit_text, $withparents) = @_;
3450         my @commit_lines = split '\n', $commit_text;
3451         my %co;
3452
3453         pop @commit_lines; # Remove '\0'
3454
3455         if (! @commit_lines) {
3456                 return;
3457         }
3458
3459         my $header = shift @commit_lines;
3460         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3461                 return;
3462         }
3463         ($co{'id'}, my @parents) = split ' ', $header;
3464         while (my $line = shift @commit_lines) {
3465                 last if $line eq "\n";
3466                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3467                         $co{'tree'} = $1;
3468                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3469                         push @parents, $1;
3470                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3471                         $co{'author'} = to_utf8($1);
3472                         $co{'author_epoch'} = $2;
3473                         $co{'author_tz'} = $3;
3474                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3475                                 $co{'author_name'}  = $1;
3476                                 $co{'author_email'} = $2;
3477                         } else {
3478                                 $co{'author_name'} = $co{'author'};
3479                         }
3480                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3481                         $co{'committer'} = to_utf8($1);
3482                         $co{'committer_epoch'} = $2;
3483                         $co{'committer_tz'} = $3;
3484                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3485                                 $co{'committer_name'}  = $1;
3486                                 $co{'committer_email'} = $2;
3487                         } else {
3488                                 $co{'committer_name'} = $co{'committer'};
3489                         }
3490                 }
3491         }
3492         if (!defined $co{'tree'}) {
3493                 return;
3494         };
3495         $co{'parents'} = \@parents;
3496         $co{'parent'} = $parents[0];
3497
3498         foreach my $title (@commit_lines) {
3499                 $title =~ s/^    //;
3500                 if ($title ne "") {
3501                         $co{'title'} = chop_str($title, 80, 5);
3502                         # remove leading stuff of merges to make the interesting part visible
3503                         if (length($title) > 50) {
3504                                 $title =~ s/^Automatic //;
3505                                 $title =~ s/^merge (of|with) /Merge ... /i;
3506                                 if (length($title) > 50) {
3507                                         $title =~ s/(http|rsync):\/\///;
3508                                 }
3509                                 if (length($title) > 50) {
3510                                         $title =~ s/(master|www|rsync)\.//;
3511                                 }
3512                                 if (length($title) > 50) {
3513                                         $title =~ s/kernel.org:?//;
3514                                 }
3515                                 if (length($title) > 50) {
3516                                         $title =~ s/\/pub\/scm//;
3517                                 }
3518                         }
3519                         $co{'title_short'} = chop_str($title, 50, 5);
3520                         last;
3521                 }
3522         }
3523         if (! defined $co{'title'} || $co{'title'} eq "") {
3524                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3525         }
3526         # remove added spaces
3527         foreach my $line (@commit_lines) {
3528                 $line =~ s/^    //;
3529         }
3530         $co{'comment'} = \@commit_lines;
3531
3532         my $age = time - $co{'committer_epoch'};
3533         $co{'age'} = $age;
3534         $co{'age_string'} = age_string($age);
3535         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3536         if ($age > 60*60*24*7*2) {
3537                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3538                 $co{'age_string_age'} = $co{'age_string'};
3539         } else {
3540                 $co{'age_string_date'} = $co{'age_string'};
3541                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3542         }
3543         return %co;
3544 }
3545
3546 sub parse_commit {
3547         my ($commit_id) = @_;
3548         my %co;
3549
3550         local $/ = "\0";
3551
3552         open my $fd, "-|", git_cmd(), "rev-list",
3553                 "--parents",
3554                 "--header",
3555                 "--max-count=1",
3556                 $commit_id,
3557                 "--",
3558                 or die_error(500, "Open git-rev-list failed");
3559         %co = parse_commit_text(<$fd>, 1);
3560         close $fd;
3561
3562         return %co;
3563 }
3564
3565 sub parse_commits {
3566         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3567         my @cos;
3568
3569         $maxcount ||= 1;
3570         $skip ||= 0;
3571
3572         local $/ = "\0";
3573
3574         open my $fd, "-|", git_cmd(), "rev-list",
3575                 "--header",
3576                 @args,
3577                 ("--max-count=" . $maxcount),
3578                 ("--skip=" . $skip),
3579                 @extra_options,
3580                 $commit_id,
3581                 "--",
3582                 ($filename ? ($filename) : ())
3583                 or die_error(500, "Open git-rev-list failed");
3584         while (my $line = <$fd>) {
3585                 my %co = parse_commit_text($line);
3586                 push @cos, \%co;
3587         }
3588         close $fd;
3589
3590         return wantarray ? @cos : \@cos;
3591 }
3592
3593 # parse line of git-diff-tree "raw" output
3594 sub parse_difftree_raw_line {
3595         my $line = shift;
3596         my %res;
3597
3598         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3599         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3600         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3601                 $res{'from_mode'} = $1;
3602                 $res{'to_mode'} = $2;
3603                 $res{'from_id'} = $3;
3604                 $res{'to_id'} = $4;
3605                 $res{'status'} = $5;
3606                 $res{'similarity'} = $6;
3607                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3608                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3609                 } else {
3610                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3611                 }
3612         }
3613         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3614         # combined diff (for merge commit)
3615         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3616                 $res{'nparents'}  = length($1);
3617                 $res{'from_mode'} = [ split(' ', $2) ];
3618                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3619                 $res{'from_id'} = [ split(' ', $3) ];
3620                 $res{'to_id'} = pop @{$res{'from_id'}};
3621                 $res{'status'} = [ split('', $4) ];
3622                 $res{'to_file'} = unquote($5);
3623         }
3624         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3625         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3626                 $res{'commit'} = $1;
3627         }
3628
3629         return wantarray ? %res : \%res;
3630 }
3631
3632 # wrapper: return parsed line of git-diff-tree "raw" output
3633 # (the argument might be raw line, or parsed info)
3634 sub parsed_difftree_line {
3635         my $line_or_ref = shift;
3636
3637         if (ref($line_or_ref) eq "HASH") {
3638                 # pre-parsed (or generated by hand)
3639                 return $line_or_ref;
3640         } else {
3641                 return parse_difftree_raw_line($line_or_ref);
3642         }
3643 }
3644
3645 # parse line of git-ls-tree output
3646 sub parse_ls_tree_line {
3647         my $line = shift;
3648         my %opts = @_;
3649         my %res;
3650
3651         if ($opts{'-l'}) {
3652                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3653                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3654
3655                 $res{'mode'} = $1;
3656                 $res{'type'} = $2;
3657                 $res{'hash'} = $3;
3658                 $res{'size'} = $4;
3659                 if ($opts{'-z'}) {
3660                         $res{'name'} = $5;
3661                 } else {
3662                         $res{'name'} = unquote($5);
3663                 }
3664         } else {
3665                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3666                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3667
3668                 $res{'mode'} = $1;
3669                 $res{'type'} = $2;
3670                 $res{'hash'} = $3;
3671                 if ($opts{'-z'}) {
3672                         $res{'name'} = $4;
3673                 } else {
3674                         $res{'name'} = unquote($4);
3675                 }
3676         }
3677
3678         return wantarray ? %res : \%res;
3679 }
3680
3681 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3682 sub parse_from_to_diffinfo {
3683         my ($diffinfo, $from, $to, @parents) = @_;
3684
3685         if ($diffinfo->{'nparents'}) {
3686                 # combined diff
3687                 $from->{'file'} = [];
3688                 $from->{'href'} = [];
3689                 fill_from_file_info($diffinfo, @parents)
3690                         unless exists $diffinfo->{'from_file'};
3691                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3692                         $from->{'file'}[$i] =
3693                                 defined $diffinfo->{'from_file'}[$i] ?
3694                                         $diffinfo->{'from_file'}[$i] :
3695                                         $diffinfo->{'to_file'};
3696                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3697                                 $from->{'href'}[$i] = href(action=>"blob",
3698                                                            hash_base=>$parents[$i],
3699                                                            hash=>$diffinfo->{'from_id'}[$i],
3700                                                            file_name=>$from->{'file'}[$i]);
3701                         } else {
3702                                 $from->{'href'}[$i] = undef;
3703                         }
3704                 }
3705         } else {
3706                 # ordinary (not combined) diff
3707                 $from->{'file'} = $diffinfo->{'from_file'};
3708                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3709                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3710                                                hash=>$diffinfo->{'from_id'},
3711                                                file_name=>$from->{'file'});
3712                 } else {
3713                         delete $from->{'href'};
3714                 }
3715         }
3716
3717         $to->{'file'} = $diffinfo->{'to_file'};
3718         if (!is_deleted($diffinfo)) { # file exists in result
3719                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3720                                      hash=>$diffinfo->{'to_id'},
3721                                      file_name=>$to->{'file'});
3722         } else {
3723                 delete $to->{'href'};
3724         }
3725 }
3726
3727 ## ......................................................................
3728 ## parse to array of hashes functions
3729
3730 sub git_get_heads_list {
3731         my ($limit, @classes) = @_;
3732         @classes = get_branch_refs() unless @classes;
3733         my @patterns = map { "refs/$_" } @classes;
3734         my @headslist;
3735
3736         open my $fd, '-|', git_cmd(), 'for-each-ref',
3737                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3738                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3739                 @patterns
3740                 or return;
3741         while (my $line = <$fd>) {
3742                 my %ref_item;
3743
3744                 chomp $line;
3745                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3746                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3747                 my ($committer, $epoch, $tz) =
3748                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3749                 $ref_item{'fullname'}  = $name;
3750                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3751                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3752                 $ref_item{'name'} = $name;
3753                 # for refs neither in 'heads' nor 'remotes' we want to
3754                 # show their ref dir
3755                 my $ref_dir = (defined $1) ? $1 : '';
3756                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3757                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3758                 }
3759
3760                 $ref_item{'id'}    = $hash;
3761                 $ref_item{'title'} = $title || '(no commit message)';
3762                 $ref_item{'epoch'} = $epoch;
3763                 if ($epoch) {
3764                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3765                 } else {
3766                         $ref_item{'age'} = "unknown";
3767                 }
3768
3769                 push @headslist, \%ref_item;
3770         }
3771         close $fd;
3772
3773         return wantarray ? @headslist : \@headslist;
3774 }
3775
3776 sub git_get_tags_list {
3777         my $limit = shift;
3778         my @tagslist;
3779
3780         open my $fd, '-|', git_cmd(), 'for-each-ref',
3781                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3782                 '--format=%(objectname) %(objecttype) %(refname) '.
3783                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3784                 'refs/tags'
3785                 or return;
3786         while (my $line = <$fd>) {
3787                 my %ref_item;
3788
3789                 chomp $line;
3790                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3791                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3792                 my ($creator, $epoch, $tz) =
3793                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3794                 $ref_item{'fullname'} = $name;
3795                 $name =~ s!^refs/tags/!!;
3796
3797                 $ref_item{'type'} = $type;
3798                 $ref_item{'id'} = $id;
3799                 $ref_item{'name'} = $name;
3800                 if ($type eq "tag") {
3801                         $ref_item{'subject'} = $title;
3802                         $ref_item{'reftype'} = $reftype;
3803                         $ref_item{'refid'}   = $refid;
3804                 } else {
3805                         $ref_item{'reftype'} = $type;
3806                         $ref_item{'refid'}   = $id;
3807                 }
3808
3809                 if ($type eq "tag" || $type eq "commit") {
3810                         $ref_item{'epoch'} = $epoch;
3811                         if ($epoch) {
3812                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3813                         } else {
3814                                 $ref_item{'age'} = "unknown";
3815                         }
3816                 }
3817
3818                 push @tagslist, \%ref_item;
3819         }
3820         close $fd;
3821
3822         return wantarray ? @tagslist : \@tagslist;
3823 }
3824
3825 ## ----------------------------------------------------------------------
3826 ## filesystem-related functions
3827
3828 sub get_file_owner {
3829         my $path = shift;
3830
3831         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3832         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3833         if (!defined $gcos) {
3834                 return undef;
3835         }
3836         my $owner = $gcos;
3837         $owner =~ s/[,;].*$//;
3838         return to_utf8($owner);
3839 }
3840
3841 # assume that file exists
3842 sub insert_file {
3843         my $filename = shift;
3844
3845         open my $fd, '<', $filename;
3846         print map { to_utf8($_) } <$fd>;
3847         close $fd;
3848 }
3849
3850 ## ......................................................................
3851 ## mimetype related functions
3852
3853 sub mimetype_guess_file {
3854         my $filename = shift;
3855         my $mimemap = shift;
3856         -r $mimemap or return undef;
3857
3858         my %mimemap;
3859         open(my $mh, '<', $mimemap) or return undef;
3860         while (<$mh>) {
3861                 next if m/^#/; # skip comments
3862                 my ($mimetype, @exts) = split(/\s+/);
3863                 foreach my $ext (@exts) {
3864                         $mimemap{$ext} = $mimetype;
3865                 }
3866         }
3867         close($mh);
3868
3869         $filename =~ /\.([^.]*)$/;
3870         return $mimemap{$1};
3871 }
3872
3873 sub mimetype_guess {
3874         my $filename = shift;
3875         my $mime;
3876         $filename =~ /\./ or return undef;
3877
3878         if ($mimetypes_file) {
3879                 my $file = $mimetypes_file;
3880                 if ($file !~ m!^/!) { # if it is relative path
3881                         # it is relative to project
3882                         $file = "$projectroot/$project/$file";
3883                 }
3884                 $mime = mimetype_guess_file($filename, $file);
3885         }
3886         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3887         return $mime;
3888 }
3889
3890 sub blob_mimetype {
3891         my $fd = shift;
3892         my $filename = shift;
3893
3894         if ($filename) {
3895                 my $mime = mimetype_guess($filename);
3896                 $mime and return $mime;
3897         }
3898
3899         # just in case
3900         return $default_blob_plain_mimetype unless $fd;
3901
3902         if (-T $fd) {
3903                 return 'text/plain';
3904         } elsif (! $filename) {
3905                 return 'application/octet-stream';
3906         } elsif ($filename =~ m/\.png$/i) {
3907                 return 'image/png';
3908         } elsif ($filename =~ m/\.gif$/i) {
3909                 return 'image/gif';
3910         } elsif ($filename =~ m/\.jpe?g$/i) {
3911                 return 'image/jpeg';
3912         } else {
3913                 return 'application/octet-stream';
3914         }
3915 }
3916
3917 sub blob_contenttype {
3918         my ($fd, $file_name, $type) = @_;
3919
3920         $type ||= blob_mimetype($fd, $file_name);
3921         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3922                 $type .= "; charset=$default_text_plain_charset";
3923         }
3924
3925         return $type;
3926 }
3927
3928 # guess file syntax for syntax highlighting; return undef if no highlighting
3929 # the name of syntax can (in the future) depend on syntax highlighter used
3930 sub guess_file_syntax {
3931         my ($highlight, $file_name) = @_;
3932         return undef unless ($highlight && defined $file_name);
3933         my $basename = basename($file_name, '.in');
3934         return $highlight_basename{$basename}
3935                 if exists $highlight_basename{$basename};
3936
3937         $basename =~ /\.([^.]*)$/;
3938         my $ext = $1 or return undef;
3939         return $highlight_ext{$ext}
3940                 if exists $highlight_ext{$ext};
3941
3942         return undef;
3943 }
3944
3945 # run highlighter and return FD of its output,
3946 # or return original FD if no highlighting
3947 sub run_highlighter {
3948         my ($fd, $highlight, $syntax) = @_;
3949         return $fd unless ($highlight);
3950
3951         close $fd;
3952         my $syntax_arg = (defined $syntax) ? "--syntax $syntax" : "--force";
3953         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3954                   quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
3955                     '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
3956                     '--', "-fe=$fallback_encoding")." | ".
3957                   quote_command($highlight_bin).
3958                   " --replace-tabs=8 --fragment $syntax_arg |"
3959                 or die_error(500, "Couldn't open file or run syntax highlighter");
3960         return $fd;
3961 }
3962
3963 ## ======================================================================
3964 ## functions printing HTML: header, footer, error page
3965
3966 sub get_page_title {
3967         my $title = to_utf8($site_name);
3968
3969         unless (defined $project) {
3970                 if (defined $project_filter) {
3971                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3972                 }
3973                 return $title;
3974         }
3975         $title .= " - " . to_utf8($project);
3976
3977         return $title unless (defined $action);
3978         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3979
3980         return $title unless (defined $file_name);
3981         $title .= " - " . esc_path($file_name);
3982         if ($action eq "tree" && $file_name !~ m|/$|) {
3983                 $title .= "/";
3984         }
3985
3986         return $title;
3987 }
3988
3989 sub get_content_type_html {
3990         # require explicit support from the UA if we are to send the page as
3991         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3992         # we have to do this because MSIE sometimes globs '*/*', pretending to
3993         # support xhtml+xml but choking when it gets what it asked for.
3994         if (defined $cgi->http('HTTP_ACCEPT') &&
3995             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3996             $cgi->Accept('application/xhtml+xml') != 0) {
3997                 return 'application/xhtml+xml';
3998         } else {
3999                 return 'text/html';
4000         }
4001 }
4002
4003 sub print_feed_meta {
4004         if (defined $project) {
4005                 my %href_params = get_feed_info();
4006                 if (!exists $href_params{'-title'}) {
4007                         $href_params{'-title'} = 'log';
4008                 }
4009
4010                 foreach my $format (qw(RSS Atom)) {
4011                         my $type = lc($format);
4012                         my %link_attr = (
4013                                 '-rel' => 'alternate',
4014                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4015                                 '-type' => "application/$type+xml"
4016                         );
4017
4018                         $href_params{'extra_options'} = undef;
4019                         $href_params{'action'} = $type;
4020                         $link_attr{'-href'} = href(%href_params);
4021                         print "<link ".
4022                               "rel=\"$link_attr{'-rel'}\" ".
4023                               "title=\"$link_attr{'-title'}\" ".
4024                               "href=\"$link_attr{'-href'}\" ".
4025                               "type=\"$link_attr{'-type'}\" ".
4026                               "/>\n";
4027
4028                         $href_params{'extra_options'} = '--no-merges';
4029                         $link_attr{'-href'} = href(%href_params);
4030                         $link_attr{'-title'} .= ' (no merges)';
4031                         print "<link ".
4032                               "rel=\"$link_attr{'-rel'}\" ".
4033                               "title=\"$link_attr{'-title'}\" ".
4034                               "href=\"$link_attr{'-href'}\" ".
4035                               "type=\"$link_attr{'-type'}\" ".
4036                               "/>\n";
4037                 }
4038
4039         } else {
4040                 printf('<link rel="alternate" title="%s projects list" '.
4041                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4042                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4043                 printf('<link rel="alternate" title="%s projects feeds" '.
4044                        'href="%s" type="text/x-opml" />'."\n",
4045                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4046         }
4047 }
4048
4049 sub print_header_links {
4050         my $status = shift;
4051
4052         # print out each stylesheet that exist, providing backwards capability
4053         # for those people who defined $stylesheet in a config file
4054         if (defined $stylesheet) {
4055                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4056         } else {
4057                 foreach my $stylesheet (@stylesheets) {
4058                         next unless $stylesheet;
4059                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4060                 }
4061         }
4062         print_feed_meta()
4063                 if ($status eq '200 OK');
4064         if (defined $favicon) {
4065                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4066         }
4067 }
4068
4069 sub print_nav_breadcrumbs_path {
4070         my $dirprefix = undef;
4071         while (my $part = shift) {
4072                 $dirprefix .= "/" if defined $dirprefix;
4073                 $dirprefix .= $part;
4074                 print $cgi->a({-href => href(project => undef,
4075                                              project_filter => $dirprefix,
4076                                              action => "project_list")},
4077                               esc_html($part)) . " / ";
4078         }
4079 }
4080
4081 sub print_nav_breadcrumbs {
4082         my %opts = @_;
4083
4084         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4085                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4086         }
4087         if (defined $project) {
4088                 my @dirname = split '/', $project;
4089                 my $projectbasename = pop @dirname;
4090                 print_nav_breadcrumbs_path(@dirname);
4091                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4092                 if (defined $action) {
4093                         my $action_print = $action ;
4094                         if (defined $opts{-action_extra}) {
4095                                 $action_print = $cgi->a({-href => href(action=>$action)},
4096                                         $action);
4097                         }
4098                         print " / $action_print";
4099                 }
4100                 if (defined $opts{-action_extra}) {
4101                         print " / $opts{-action_extra}";
4102                 }
4103                 print "\n";
4104         } elsif (defined $project_filter) {
4105                 print_nav_breadcrumbs_path(split '/', $project_filter);
4106         }
4107 }
4108
4109 sub print_search_form {
4110         if (!defined $searchtext) {
4111                 $searchtext = "";
4112         }
4113         my $search_hash;
4114         if (defined $hash_base) {
4115                 $search_hash = $hash_base;
4116         } elsif (defined $hash) {
4117                 $search_hash = $hash;
4118         } else {
4119                 $search_hash = "HEAD";
4120         }
4121         my $action = $my_uri;
4122         my $use_pathinfo = gitweb_check_feature('pathinfo');
4123         if ($use_pathinfo) {
4124                 $action .= "/".esc_url($project);
4125         }
4126         print $cgi->start_form(-method => "get", -action => $action) .
4127               "<div class=\"search\">\n" .
4128               (!$use_pathinfo &&
4129               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4130               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4131               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4132               $cgi->popup_menu(-name => 'st', -default => 'commit',
4133                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4134               " " . $cgi->a({-href => href(action=>"search_help"),
4135                              -title => "search help" }, "?") . " search:\n",
4136               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4137               "<span title=\"Extended regular expression\">" .
4138               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4139                              -checked => $search_use_regexp) .
4140               "</span>" .
4141               "</div>" .
4142               $cgi->end_form() . "\n";
4143 }
4144
4145 sub git_header_html {
4146         my $status = shift || "200 OK";
4147         my $expires = shift;
4148         my %opts = @_;
4149
4150         my $title = get_page_title();
4151         my $content_type = get_content_type_html();
4152         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4153                            -status=> $status, -expires => $expires)
4154                 unless ($opts{'-no_http_header'});
4155         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4156         print <<EOF;
4157 <?xml version="1.0" encoding="utf-8"?>
4158 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4159 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4160 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4161 <!-- git core binaries version $git_version -->
4162 <head>
4163 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4164 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4165 <meta name="robots" content="index, nofollow"/>
4166 <title>$title</title>
4167 EOF
4168         # the stylesheet, favicon etc urls won't work correctly with path_info
4169         # unless we set the appropriate base URL
4170         if ($ENV{'PATH_INFO'}) {
4171                 print "<base href=\"".esc_url($base_url)."\" />\n";
4172         }
4173         print_header_links($status);
4174
4175         if (defined $site_html_head_string) {
4176                 print to_utf8($site_html_head_string);
4177         }
4178
4179         print "</head>\n" .
4180               "<body>\n";
4181
4182         if (defined $site_header && -f $site_header) {
4183                 insert_file($site_header);
4184         }
4185
4186         print "<div class=\"page_header\">\n";
4187         if (defined $logo) {
4188                 print $cgi->a({-href => esc_url($logo_url),
4189                                -title => $logo_label},
4190                               $cgi->img({-src => esc_url($logo),
4191                                          -width => 72, -height => 27,
4192                                          -alt => "git",
4193                                          -class => "logo"}));
4194         }
4195         print_nav_breadcrumbs(%opts);
4196         print "</div>\n";
4197
4198         my $have_search = gitweb_check_feature('search');
4199         if (defined $project && $have_search) {
4200                 print_search_form();
4201         }
4202 }
4203
4204 sub git_footer_html {
4205         my $feed_class = 'rss_logo';
4206
4207         print "<div class=\"page_footer\">\n";
4208         if (defined $project) {
4209                 my $descr = git_get_project_description($project);
4210                 if (defined $descr) {
4211                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4212                 }
4213
4214                 my %href_params = get_feed_info();
4215                 if (!%href_params) {
4216                         $feed_class .= ' generic';
4217                 }
4218                 $href_params{'-title'} ||= 'log';
4219
4220                 foreach my $format (qw(RSS Atom)) {
4221                         $href_params{'action'} = lc($format);
4222                         print $cgi->a({-href => href(%href_params),
4223                                       -title => "$href_params{'-title'} $format feed",
4224                                       -class => $feed_class}, $format)."\n";
4225                 }
4226
4227         } else {
4228                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4229                                              project_filter => $project_filter),
4230                               -class => $feed_class}, "OPML") . " ";
4231                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4232                                              project_filter => $project_filter),
4233                               -class => $feed_class}, "TXT") . "\n";
4234         }
4235         print "</div>\n"; # class="page_footer"
4236
4237         if (defined $t0 && gitweb_check_feature('timed')) {
4238                 print "<div id=\"generating_info\">\n";
4239                 print 'This page took '.
4240                       '<span id="generating_time" class="time_span">'.
4241                       tv_interval($t0, [ gettimeofday() ]).
4242                       ' seconds </span>'.
4243                       ' and '.
4244                       '<span id="generating_cmd">'.
4245                       $number_of_git_cmds.
4246                       '</span> git commands '.
4247                       " to generate.\n";
4248                 print "</div>\n"; # class="page_footer"
4249         }
4250
4251         if (defined $site_footer && -f $site_footer) {
4252                 insert_file($site_footer);
4253         }
4254
4255         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4256         if (defined $action &&
4257             $action eq 'blame_incremental') {
4258                 print qq!<script type="text/javascript">\n!.
4259                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4260                       qq!           "!. href() .qq!");\n!.
4261                       qq!</script>\n!;
4262         } else {
4263                 my ($jstimezone, $tz_cookie, $datetime_class) =
4264                         gitweb_get_feature('javascript-timezone');
4265
4266                 print qq!<script type="text/javascript">\n!.
4267                       qq!window.onload = function () {\n!;
4268                 if (gitweb_check_feature('javascript-actions')) {
4269                         print qq!       fixLinks();\n!;
4270                 }
4271                 if ($jstimezone && $tz_cookie && $datetime_class) {
4272                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4273                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4274                 }
4275                 print qq!};\n!.
4276                       qq!</script>\n!;
4277         }
4278
4279         print "</body>\n" .
4280               "</html>";
4281 }
4282
4283 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4284 # Example: die_error(404, 'Hash not found')
4285 # By convention, use the following status codes (as defined in RFC 2616):
4286 # 400: Invalid or missing CGI parameters, or
4287 #      requested object exists but has wrong type.
4288 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4289 #      this server or project.
4290 # 404: Requested object/revision/project doesn't exist.
4291 # 500: The server isn't configured properly, or
4292 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4293 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4294 # 503: The server is currently unavailable (because it is overloaded,
4295 #      or down for maintenance).  Generally, this is a temporary state.
4296 sub die_error {
4297         my $status = shift || 500;
4298         my $error = esc_html(shift) || "Internal Server Error";
4299         my $extra = shift;
4300         my %opts = @_;
4301
4302         my %http_responses = (
4303                 400 => '400 Bad Request',
4304                 403 => '403 Forbidden',
4305                 404 => '404 Not Found',
4306                 500 => '500 Internal Server Error',
4307                 503 => '503 Service Unavailable',
4308         );
4309         git_header_html($http_responses{$status}, undef, %opts);
4310         print <<EOF;
4311 <div class="page_body">
4312 <br /><br />
4313 $status - $error
4314 <br />
4315 EOF
4316         if (defined $extra) {
4317                 print "<hr />\n" .
4318                       "$extra\n";
4319         }
4320         print "</div>\n";
4321
4322         git_footer_html();
4323         goto DONE_GITWEB
4324                 unless ($opts{'-error_handler'});
4325 }
4326
4327 ## ----------------------------------------------------------------------
4328 ## functions printing or outputting HTML: navigation
4329
4330 sub git_print_page_nav {
4331         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4332         $extra = '' if !defined $extra; # pager or formats
4333
4334         my @navs = qw(summary shortlog log commit commitdiff tree);
4335         if ($suppress) {
4336                 @navs = grep { $_ ne $suppress } @navs;
4337         }
4338
4339         my %arg = map { $_ => {action=>$_} } @navs;
4340         if (defined $head) {
4341                 for (qw(commit commitdiff)) {
4342                         $arg{$_}{'hash'} = $head;
4343                 }
4344                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4345                         for (qw(shortlog log)) {
4346                                 $arg{$_}{'hash'} = $head;
4347                         }
4348                 }
4349         }
4350
4351         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4352         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4353
4354         my @actions = gitweb_get_feature('actions');
4355         my %repl = (
4356                 '%' => '%',
4357                 'n' => $project,         # project name
4358                 'f' => $git_dir,         # project path within filesystem
4359                 'h' => $treehead || '',  # current hash ('h' parameter)
4360                 'b' => $treebase || '',  # hash base ('hb' parameter)
4361         );
4362         while (@actions) {
4363                 my ($label, $link, $pos) = splice(@actions,0,3);
4364                 # insert
4365                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4366                 # munch munch
4367                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4368                 $arg{$label}{'_href'} = $link;
4369         }
4370
4371         print "<div class=\"page_nav\">\n" .
4372                 (join " | ",
4373                  map { $_ eq $current ?
4374                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4375                  } @navs);
4376         print "<br/>\n$extra<br/>\n" .
4377               "</div>\n";
4378 }
4379
4380 # returns a submenu for the navigation of the refs views (tags, heads,
4381 # remotes) with the current view disabled and the remotes view only
4382 # available if the feature is enabled
4383 sub format_ref_views {
4384         my ($current) = @_;
4385         my @ref_views = qw{tags heads};
4386         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4387         return join " | ", map {
4388                 $_ eq $current ? $_ :
4389                 $cgi->a({-href => href(action=>$_)}, $_)
4390         } @ref_views
4391 }
4392
4393 sub format_paging_nav {
4394         my ($action, $page, $has_next_link) = @_;
4395         my $paging_nav;
4396
4397
4398         if ($page > 0) {
4399                 $paging_nav .=
4400                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4401                         " &sdot; " .
4402                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4403                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4404         } else {
4405                 $paging_nav .= "first &sdot; prev";
4406         }
4407
4408         if ($has_next_link) {
4409                 $paging_nav .= " &sdot; " .
4410                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4411                                  -accesskey => "n", -title => "Alt-n"}, "next");
4412         } else {
4413                 $paging_nav .= " &sdot; next";
4414         }
4415
4416         return $paging_nav;
4417 }
4418
4419 ## ......................................................................
4420 ## functions printing or outputting HTML: div
4421
4422 sub git_print_header_div {
4423         my ($action, $title, $hash, $hash_base) = @_;
4424         my %args = ();
4425
4426         $args{'action'} = $action;
4427         $args{'hash'} = $hash if $hash;
4428         $args{'hash_base'} = $hash_base if $hash_base;
4429
4430         print "<div class=\"header\">\n" .
4431               $cgi->a({-href => href(%args), -class => "title"},
4432               $title ? $title : $action) .
4433               "\n</div>\n";
4434 }
4435
4436 sub format_repo_url {
4437         my ($name, $url) = @_;
4438         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4439 }
4440
4441 # Group output by placing it in a DIV element and adding a header.
4442 # Options for start_div() can be provided by passing a hash reference as the
4443 # first parameter to the function.
4444 # Options to git_print_header_div() can be provided by passing an array
4445 # reference. This must follow the options to start_div if they are present.
4446 # The content can be a scalar, which is output as-is, a scalar reference, which
4447 # is output after html escaping, an IO handle passed either as *handle or
4448 # *handle{IO}, or a function reference. In the latter case all following
4449 # parameters will be taken as argument to the content function call.
4450 sub git_print_section {
4451         my ($div_args, $header_args, $content);
4452         my $arg = shift;
4453         if (ref($arg) eq 'HASH') {
4454                 $div_args = $arg;
4455                 $arg = shift;
4456         }
4457         if (ref($arg) eq 'ARRAY') {
4458                 $header_args = $arg;
4459                 $arg = shift;
4460         }
4461         $content = $arg;
4462
4463         print $cgi->start_div($div_args);
4464         git_print_header_div(@$header_args);
4465
4466         if (ref($content) eq 'CODE') {
4467                 $content->(@_);
4468         } elsif (ref($content) eq 'SCALAR') {
4469                 print esc_html($$content);
4470         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4471                 print <$content>;
4472         } elsif (!ref($content) && defined($content)) {
4473                 print $content;
4474         }
4475
4476         print $cgi->end_div;
4477 }
4478
4479 sub format_timestamp_html {
4480         my $date = shift;
4481         my $strtime = $date->{'rfc2822'};
4482
4483         my (undef, undef, $datetime_class) =
4484                 gitweb_get_feature('javascript-timezone');
4485         if ($datetime_class) {
4486                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4487         }
4488
4489         my $localtime_format = '(%02d:%02d %s)';
4490         if ($date->{'hour_local'} < 6) {
4491                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4492         }
4493         $strtime .= ' ' .
4494                     sprintf($localtime_format,
4495                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4496
4497         return $strtime;
4498 }
4499
4500 # Outputs the author name and date in long form
4501 sub git_print_authorship {
4502         my $co = shift;
4503         my %opts = @_;
4504         my $tag = $opts{-tag} || 'div';
4505         my $author = $co->{'author_name'};
4506
4507         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4508         print "<$tag class=\"author_date\">" .
4509               format_search_author($author, "author", esc_html($author)) .
4510               " [".format_timestamp_html(\%ad)."]".
4511               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4512               "</$tag>\n";
4513 }
4514
4515 # Outputs table rows containing the full author or committer information,
4516 # in the format expected for 'commit' view (& similar).
4517 # Parameters are a commit hash reference, followed by the list of people
4518 # to output information for. If the list is empty it defaults to both
4519 # author and committer.
4520 sub git_print_authorship_rows {
4521         my $co = shift;
4522         # too bad we can't use @people = @_ || ('author', 'committer')
4523         my @people = @_;
4524         @people = ('author', 'committer') unless @people;
4525         foreach my $who (@people) {
4526                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4527                 print "<tr><td>$who</td><td>" .
4528                       format_search_author($co->{"${who}_name"}, $who,
4529                                            esc_html($co->{"${who}_name"})) . " " .
4530                       format_search_author($co->{"${who}_email"}, $who,
4531                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4532                       "</td><td rowspan=\"2\">" .
4533                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4534                       "</td></tr>\n" .
4535                       "<tr>" .
4536                       "<td></td><td>" .
4537                       format_timestamp_html(\%wd) .
4538                       "</td>" .
4539                       "</tr>\n";
4540         }
4541 }
4542
4543 sub git_print_page_path {
4544         my $name = shift;
4545         my $type = shift;
4546         my $hb = shift;
4547
4548
4549         print "<div class=\"page_path\">";
4550         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4551                       -title => 'tree root'}, to_utf8("[$project]"));
4552         print " / ";
4553         if (defined $name) {
4554                 my @dirname = split '/', $name;
4555                 my $basename = pop @dirname;
4556                 my $fullname = '';
4557
4558                 foreach my $dir (@dirname) {
4559                         $fullname .= ($fullname ? '/' : '') . $dir;
4560                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4561                                                      hash_base=>$hb),
4562                                       -title => $fullname}, esc_path($dir));
4563                         print " / ";
4564                 }
4565                 if (defined $type && $type eq 'blob') {
4566                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4567                                                      hash_base=>$hb),
4568                                       -title => $name}, esc_path($basename));
4569                 } elsif (defined $type && $type eq 'tree') {
4570                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4571                                                      hash_base=>$hb),
4572                                       -title => $name}, esc_path($basename));
4573                         print " / ";
4574                 } else {
4575                         print esc_path($basename);
4576                 }
4577         }
4578         print "<br/></div>\n";
4579 }
4580
4581 sub git_print_log {
4582         my $log = shift;
4583         my %opts = @_;
4584
4585         if ($opts{'-remove_title'}) {
4586                 # remove title, i.e. first line of log
4587                 shift @$log;
4588         }
4589         # remove leading empty lines
4590         while (defined $log->[0] && $log->[0] eq "") {
4591                 shift @$log;
4592         }
4593
4594         # print log
4595         my $skip_blank_line = 0;
4596         foreach my $line (@$log) {
4597                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4598                         if (! $opts{'-remove_signoff'}) {
4599                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4600                                 $skip_blank_line = 1;
4601                         }
4602                         next;
4603                 }
4604
4605                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4606                         if (! $opts{'-remove_signoff'}) {
4607                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4608                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4609                                         "</span><br/>\n";
4610                                 $skip_blank_line = 1;
4611                         }
4612                         next;
4613                 }
4614
4615                 # print only one empty line
4616                 # do not print empty line after signoff
4617                 if ($line eq "") {
4618                         next if ($skip_blank_line);
4619                         $skip_blank_line = 1;
4620                 } else {
4621                         $skip_blank_line = 0;
4622                 }
4623
4624                 print format_log_line_html($line) . "<br/>\n";
4625         }
4626
4627         if ($opts{'-final_empty_line'}) {
4628                 # end with single empty line
4629                 print "<br/>\n" unless $skip_blank_line;
4630         }
4631 }
4632
4633 # return link target (what link points to)
4634 sub git_get_link_target {
4635         my $hash = shift;
4636         my $link_target;
4637
4638         # read link
4639         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4640                 or return;
4641         {
4642                 local $/ = undef;
4643                 $link_target = <$fd>;
4644         }
4645         close $fd
4646                 or return;
4647
4648         return $link_target;
4649 }
4650
4651 # given link target, and the directory (basedir) the link is in,
4652 # return target of link relative to top directory (top tree);
4653 # return undef if it is not possible (including absolute links).
4654 sub normalize_link_target {
4655         my ($link_target, $basedir) = @_;
4656
4657         # absolute symlinks (beginning with '/') cannot be normalized
4658         return if (substr($link_target, 0, 1) eq '/');
4659
4660         # normalize link target to path from top (root) tree (dir)
4661         my $path;
4662         if ($basedir) {
4663                 $path = $basedir . '/' . $link_target;
4664         } else {
4665                 # we are in top (root) tree (dir)
4666                 $path = $link_target;
4667         }
4668
4669         # remove //, /./, and /../
4670         my @path_parts;
4671         foreach my $part (split('/', $path)) {
4672                 # discard '.' and ''
4673                 next if (!$part || $part eq '.');
4674                 # handle '..'
4675                 if ($part eq '..') {
4676                         if (@path_parts) {
4677                                 pop @path_parts;
4678                         } else {
4679                                 # link leads outside repository (outside top dir)
4680                                 return;
4681                         }
4682                 } else {
4683                         push @path_parts, $part;
4684                 }
4685         }
4686         $path = join('/', @path_parts);
4687
4688         return $path;
4689 }
4690
4691 # print tree entry (row of git_tree), but without encompassing <tr> element
4692 sub git_print_tree_entry {
4693         my ($t, $basedir, $hash_base, $have_blame) = @_;
4694
4695         my %base_key = ();
4696         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4697
4698         # The format of a table row is: mode list link.  Where mode is
4699         # the mode of the entry, list is the name of the entry, an href,
4700         # and link is the action links of the entry.
4701
4702         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4703         if (exists $t->{'size'}) {
4704                 print "<td class=\"size\">$t->{'size'}</td>\n";
4705         }
4706         if ($t->{'type'} eq "blob") {
4707                 print "<td class=\"list\">" .
4708                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4709                                                file_name=>"$basedir$t->{'name'}", %base_key),
4710                                 -class => "list"}, esc_path($t->{'name'}));
4711                 if (S_ISLNK(oct $t->{'mode'})) {
4712                         my $link_target = git_get_link_target($t->{'hash'});
4713                         if ($link_target) {
4714                                 my $norm_target = normalize_link_target($link_target, $basedir);
4715                                 if (defined $norm_target) {
4716                                         print " -> " .
4717                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4718                                                                      file_name=>$norm_target),
4719                                                        -title => $norm_target}, esc_path($link_target));
4720                                 } else {
4721                                         print " -> " . esc_path($link_target);
4722                                 }
4723                         }
4724                 }
4725                 print "</td>\n";
4726                 print "<td class=\"link\">";
4727                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4728                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4729                               "blob");
4730                 if ($have_blame) {
4731                         print " | " .
4732                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4733                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4734                                       "blame");
4735                 }
4736                 if (defined $hash_base) {
4737                         print " | " .
4738                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4739                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4740                                       "history");
4741                 }
4742                 print " | " .
4743                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4744                                                file_name=>"$basedir$t->{'name'}")},
4745                                 "raw");
4746                 print "</td>\n";
4747
4748         } elsif ($t->{'type'} eq "tree") {
4749                 print "<td class=\"list\">";
4750                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4751                                              file_name=>"$basedir$t->{'name'}",
4752                                              %base_key)},
4753                               esc_path($t->{'name'}));
4754                 print "</td>\n";
4755                 print "<td class=\"link\">";
4756                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4757                                              file_name=>"$basedir$t->{'name'}",
4758                                              %base_key)},
4759                               "tree");
4760                 if (defined $hash_base) {
4761                         print " | " .
4762                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4763                                                      file_name=>"$basedir$t->{'name'}")},
4764                                       "history");
4765                 }
4766                 print "</td>\n";
4767         } else {
4768                 # unknown object: we can only present history for it
4769                 # (this includes 'commit' object, i.e. submodule support)
4770                 print "<td class=\"list\">" .
4771                       esc_path($t->{'name'}) .
4772                       "</td>\n";
4773                 print "<td class=\"link\">";
4774                 if (defined $hash_base) {
4775                         print $cgi->a({-href => href(action=>"history",
4776                                                      hash_base=>$hash_base,
4777                                                      file_name=>"$basedir$t->{'name'}")},
4778                                       "history");
4779                 }
4780                 print "</td>\n";
4781         }
4782 }
4783
4784 ## ......................................................................
4785 ## functions printing large fragments of HTML
4786
4787 # get pre-image filenames for merge (combined) diff
4788 sub fill_from_file_info {
4789         my ($diff, @parents) = @_;
4790
4791         $diff->{'from_file'} = [ ];
4792         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4793         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4794                 if ($diff->{'status'}[$i] eq 'R' ||
4795                     $diff->{'status'}[$i] eq 'C') {
4796                         $diff->{'from_file'}[$i] =
4797                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4798                 }
4799         }
4800
4801         return $diff;
4802 }
4803
4804 # is current raw difftree line of file deletion
4805 sub is_deleted {
4806         my $diffinfo = shift;
4807
4808         return $diffinfo->{'to_id'} eq ('0' x 40);
4809 }
4810
4811 # does patch correspond to [previous] difftree raw line
4812 # $diffinfo  - hashref of parsed raw diff format
4813 # $patchinfo - hashref of parsed patch diff format
4814 #              (the same keys as in $diffinfo)
4815 sub is_patch_split {
4816         my ($diffinfo, $patchinfo) = @_;
4817
4818         return defined $diffinfo && defined $patchinfo
4819                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4820 }
4821
4822
4823 sub git_difftree_body {
4824         my ($difftree, $hash, @parents) = @_;
4825         my ($parent) = $parents[0];
4826         my $have_blame = gitweb_check_feature('blame');
4827         print "<div class=\"list_head\">\n";
4828         if ($#{$difftree} > 10) {
4829                 print(($#{$difftree} + 1) . " files changed:\n");
4830         }
4831         print "</div>\n";
4832
4833         print "<table class=\"" .
4834               (@parents > 1 ? "combined " : "") .
4835               "diff_tree\">\n";
4836
4837         # header only for combined diff in 'commitdiff' view
4838         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4839         if ($has_header) {
4840                 # table header
4841                 print "<thead><tr>\n" .
4842                        "<th></th><th></th>\n"; # filename, patchN link
4843                 for (my $i = 0; $i < @parents; $i++) {
4844                         my $par = $parents[$i];
4845                         print "<th>" .
4846                               $cgi->a({-href => href(action=>"commitdiff",
4847                                                      hash=>$hash, hash_parent=>$par),
4848                                        -title => 'commitdiff to parent number ' .
4849                                                   ($i+1) . ': ' . substr($par,0,7)},
4850                                       $i+1) .
4851                               "&nbsp;</th>\n";
4852                 }
4853                 print "</tr></thead>\n<tbody>\n";
4854         }
4855
4856         my $alternate = 1;
4857         my $patchno = 0;
4858         foreach my $line (@{$difftree}) {
4859                 my $diff = parsed_difftree_line($line);
4860
4861                 if ($alternate) {
4862                         print "<tr class=\"dark\">\n";
4863                 } else {
4864                         print "<tr class=\"light\">\n";
4865                 }
4866                 $alternate ^= 1;
4867
4868                 if (exists $diff->{'nparents'}) { # combined diff
4869
4870                         fill_from_file_info($diff, @parents)
4871                                 unless exists $diff->{'from_file'};
4872
4873                         if (!is_deleted($diff)) {
4874                                 # file exists in the result (child) commit
4875                                 print "<td>" .
4876                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4877                                                              file_name=>$diff->{'to_file'},
4878                                                              hash_base=>$hash),
4879                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4880                                       "</td>\n";
4881                         } else {
4882                                 print "<td>" .
4883                                       esc_path($diff->{'to_file'}) .
4884                                       "</td>\n";
4885                         }
4886
4887                         if ($action eq 'commitdiff') {
4888                                 # link to patch
4889                                 $patchno++;
4890                                 print "<td class=\"link\">" .
4891                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4892                                               "patch") .
4893                                       " | " .
4894                                       "</td>\n";
4895                         }
4896
4897                         my $has_history = 0;
4898                         my $not_deleted = 0;
4899                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4900                                 my $hash_parent = $parents[$i];
4901                                 my $from_hash = $diff->{'from_id'}[$i];
4902                                 my $from_path = $diff->{'from_file'}[$i];
4903                                 my $status = $diff->{'status'}[$i];
4904
4905                                 $has_history ||= ($status ne 'A');
4906                                 $not_deleted ||= ($status ne 'D');
4907
4908                                 if ($status eq 'A') {
4909                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4910                                 } elsif ($status eq 'D') {
4911                                         print "<td class=\"link\">" .
4912                                               $cgi->a({-href => href(action=>"blob",
4913                                                                      hash_base=>$hash,
4914                                                                      hash=>$from_hash,
4915                                                                      file_name=>$from_path)},
4916                                                       "blob" . ($i+1)) .
4917                                               " | </td>\n";
4918                                 } else {
4919                                         if ($diff->{'to_id'} eq $from_hash) {
4920                                                 print "<td class=\"link nochange\">";
4921                                         } else {
4922                                                 print "<td class=\"link\">";
4923                                         }
4924                                         print $cgi->a({-href => href(action=>"blobdiff",
4925                                                                      hash=>$diff->{'to_id'},
4926                                                                      hash_parent=>$from_hash,
4927                                                                      hash_base=>$hash,
4928                                                                      hash_parent_base=>$hash_parent,
4929                                                                      file_name=>$diff->{'to_file'},
4930                                                                      file_parent=>$from_path)},
4931                                                       "diff" . ($i+1)) .
4932                                               " | </td>\n";
4933                                 }
4934                         }
4935
4936                         print "<td class=\"link\">";
4937                         if ($not_deleted) {
4938                                 print $cgi->a({-href => href(action=>"blob",
4939                                                              hash=>$diff->{'to_id'},
4940                                                              file_name=>$diff->{'to_file'},
4941                                                              hash_base=>$hash)},
4942                                               "blob");
4943                                 print " | " if ($has_history);
4944                         }
4945                         if ($has_history) {
4946                                 print $cgi->a({-href => href(action=>"history",
4947                                                              file_name=>$diff->{'to_file'},
4948                                                              hash_base=>$hash)},
4949                                               "history");
4950                         }
4951                         print "</td>\n";
4952
4953                         print "</tr>\n";
4954                         next; # instead of 'else' clause, to avoid extra indent
4955                 }
4956                 # else ordinary diff
4957
4958                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4959                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4960                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4961                         $to_mode_oct = oct $diff->{'to_mode'};
4962                         if (S_ISREG($to_mode_oct)) { # only for regular file
4963                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4964                         }
4965                         $to_file_type = file_type($diff->{'to_mode'});
4966                 }
4967                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4968                         $from_mode_oct = oct $diff->{'from_mode'};
4969                         if (S_ISREG($from_mode_oct)) { # only for regular file
4970                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4971                         }
4972                         $from_file_type = file_type($diff->{'from_mode'});
4973                 }
4974
4975                 if ($diff->{'status'} eq "A") { # created
4976                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4977                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4978                         $mode_chng   .= "]</span>";
4979                         print "<td>";
4980                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4981                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4982                                       -class => "list"}, esc_path($diff->{'file'}));
4983                         print "</td>\n";
4984                         print "<td>$mode_chng</td>\n";
4985                         print "<td class=\"link\">";
4986                         if ($action eq 'commitdiff') {
4987                                 # link to patch
4988                                 $patchno++;
4989                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4990                                               "patch") .
4991                                       " | ";
4992                         }
4993                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4994                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4995                                       "blob");
4996                         print "</td>\n";
4997
4998                 } elsif ($diff->{'status'} eq "D") { # deleted
4999                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5000                         print "<td>";
5001                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5002                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5003                                        -class => "list"}, esc_path($diff->{'file'}));
5004                         print "</td>\n";
5005                         print "<td>$mode_chng</td>\n";
5006                         print "<td class=\"link\">";
5007                         if ($action eq 'commitdiff') {
5008                                 # link to patch
5009                                 $patchno++;
5010                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5011                                               "patch") .
5012                                       " | ";
5013                         }
5014                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5015                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5016                                       "blob") . " | ";
5017                         if ($have_blame) {
5018                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5019                                                              file_name=>$diff->{'file'})},
5020                                               "blame") . " | ";
5021                         }
5022                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5023                                                      file_name=>$diff->{'file'})},
5024                                       "history");
5025                         print "</td>\n";
5026
5027                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5028                         my $mode_chnge = "";
5029                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5030                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5031                                 if ($from_file_type ne $to_file_type) {
5032                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5033                                 }
5034                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5035                                         if ($from_mode_str && $to_mode_str) {
5036                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5037                                         } elsif ($to_mode_str) {
5038                                                 $mode_chnge .= " mode: $to_mode_str";
5039                                         }
5040                                 }
5041                                 $mode_chnge .= "]</span>\n";
5042                         }
5043                         print "<td>";
5044                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5045                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5046                                       -class => "list"}, esc_path($diff->{'file'}));
5047                         print "</td>\n";
5048                         print "<td>$mode_chnge</td>\n";
5049                         print "<td class=\"link\">";
5050                         if ($action eq 'commitdiff') {
5051                                 # link to patch
5052                                 $patchno++;
5053                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5054                                               "patch") .
5055                                       " | ";
5056                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5057                                 # "commit" view and modified file (not onlu mode changed)
5058                                 print $cgi->a({-href => href(action=>"blobdiff",
5059                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5060                                                              hash_base=>$hash, hash_parent_base=>$parent,
5061                                                              file_name=>$diff->{'file'})},
5062                                               "diff") .
5063                                       " | ";
5064                         }
5065                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5066                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5067                                        "blob") . " | ";
5068                         if ($have_blame) {
5069                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5070                                                              file_name=>$diff->{'file'})},
5071                                               "blame") . " | ";
5072                         }
5073                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5074                                                      file_name=>$diff->{'file'})},
5075                                       "history");
5076                         print "</td>\n";
5077
5078                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5079                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5080                         my $nstatus = $status_name{$diff->{'status'}};
5081                         my $mode_chng = "";
5082                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5083                                 # mode also for directories, so we cannot use $to_mode_str
5084                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5085                         }
5086                         print "<td>" .
5087                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5088                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5089                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5090                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5091                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5092                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5093                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5094                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5095                               "<td class=\"link\">";
5096                         if ($action eq 'commitdiff') {
5097                                 # link to patch
5098                                 $patchno++;
5099                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5100                                               "patch") .
5101                                       " | ";
5102                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5103                                 # "commit" view and modified file (not only pure rename or copy)
5104                                 print $cgi->a({-href => href(action=>"blobdiff",
5105                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5106                                                              hash_base=>$hash, hash_parent_base=>$parent,
5107                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5108                                               "diff") .
5109                                       " | ";
5110                         }
5111                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5112                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5113                                       "blob") . " | ";
5114                         if ($have_blame) {
5115                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5116                                                              file_name=>$diff->{'to_file'})},
5117                                               "blame") . " | ";
5118                         }
5119                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5120                                                     file_name=>$diff->{'to_file'})},
5121                                       "history");
5122                         print "</td>\n";
5123
5124                 } # we should not encounter Unmerged (U) or Unknown (X) status
5125                 print "</tr>\n";
5126         }
5127         print "</tbody>" if $has_header;
5128         print "</table>\n";
5129 }
5130
5131 # Print context lines and then rem/add lines in a side-by-side manner.
5132 sub print_sidebyside_diff_lines {
5133         my ($ctx, $rem, $add) = @_;
5134
5135         # print context block before add/rem block
5136         if (@$ctx) {
5137                 print join '',
5138                         '<div class="chunk_block ctx">',
5139                                 '<div class="old">',
5140                                 @$ctx,
5141                                 '</div>',
5142                                 '<div class="new">',
5143                                 @$ctx,
5144                                 '</div>',
5145                         '</div>';
5146         }
5147
5148         if (!@$add) {
5149                 # pure removal
5150                 print join '',
5151                         '<div class="chunk_block rem">',
5152                                 '<div class="old">',
5153                                 @$rem,
5154                                 '</div>',
5155                         '</div>';
5156         } elsif (!@$rem) {
5157                 # pure addition
5158                 print join '',
5159                         '<div class="chunk_block add">',
5160                                 '<div class="new">',
5161                                 @$add,
5162                                 '</div>',
5163                         '</div>';
5164         } else {
5165                 print join '',
5166                         '<div class="chunk_block chg">',
5167                                 '<div class="old">',
5168                                 @$rem,
5169                                 '</div>',
5170                                 '<div class="new">',
5171                                 @$add,
5172                                 '</div>',
5173                         '</div>';
5174         }
5175 }
5176
5177 # Print context lines and then rem/add lines in inline manner.
5178 sub print_inline_diff_lines {
5179         my ($ctx, $rem, $add) = @_;
5180
5181         print @$ctx, @$rem, @$add;
5182 }
5183
5184 # Format removed and added line, mark changed part and HTML-format them.
5185 # Implementation is based on contrib/diff-highlight
5186 sub format_rem_add_lines_pair {
5187         my ($rem, $add, $num_parents) = @_;
5188
5189         # We need to untabify lines before split()'ing them;
5190         # otherwise offsets would be invalid.
5191         chomp $rem;
5192         chomp $add;
5193         $rem = untabify($rem);
5194         $add = untabify($add);
5195
5196         my @rem = split(//, $rem);
5197         my @add = split(//, $add);
5198         my ($esc_rem, $esc_add);
5199         # Ignore leading +/- characters for each parent.
5200         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5201         my ($prefix_has_nonspace, $suffix_has_nonspace);
5202
5203         my $shorter = (@rem < @add) ? @rem : @add;
5204         while ($prefix_len < $shorter) {
5205                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5206
5207                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5208                 $prefix_len++;
5209         }
5210
5211         while ($prefix_len + $suffix_len < $shorter) {
5212                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5213
5214                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5215                 $suffix_len++;
5216         }
5217
5218         # Mark lines that are different from each other, but have some common
5219         # part that isn't whitespace.  If lines are completely different, don't
5220         # mark them because that would make output unreadable, especially if
5221         # diff consists of multiple lines.
5222         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5223                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5224                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5225                 $esc_add = esc_html_hl_regions($add, 'marked',
5226                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5227         } else {
5228                 $esc_rem = esc_html($rem, -nbsp=>1);
5229                 $esc_add = esc_html($add, -nbsp=>1);
5230         }
5231
5232         return format_diff_line(\$esc_rem, 'rem'),
5233                format_diff_line(\$esc_add, 'add');
5234 }
5235
5236 # HTML-format diff context, removed and added lines.
5237 sub format_ctx_rem_add_lines {
5238         my ($ctx, $rem, $add, $num_parents) = @_;
5239         my (@new_ctx, @new_rem, @new_add);
5240         my $can_highlight = 0;
5241         my $is_combined = ($num_parents > 1);
5242
5243         # Highlight if every removed line has a corresponding added line.
5244         if (@$add > 0 && @$add == @$rem) {
5245                 $can_highlight = 1;
5246
5247                 # Highlight lines in combined diff only if the chunk contains
5248                 # diff between the same version, e.g.
5249                 #
5250                 #    - a
5251                 #   -  b
5252                 #    + c
5253                 #   +  d
5254                 #
5255                 # Otherwise the highlightling would be confusing.
5256                 if ($is_combined) {
5257                         for (my $i = 0; $i < @$add; $i++) {
5258                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5259                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5260
5261                                 $prefix_rem =~ s/-/+/g;
5262
5263                                 if ($prefix_rem ne $prefix_add) {
5264                                         $can_highlight = 0;
5265                                         last;
5266                                 }
5267                         }
5268                 }
5269         }
5270
5271         if ($can_highlight) {
5272                 for (my $i = 0; $i < @$add; $i++) {
5273                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5274                                 $rem->[$i], $add->[$i], $num_parents);
5275                         push @new_rem, $line_rem;
5276                         push @new_add, $line_add;
5277                 }
5278         } else {
5279                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5280                 @new_add = map { format_diff_line($_, 'add') } @$add;
5281         }
5282
5283         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5284
5285         return (\@new_ctx, \@new_rem, \@new_add);
5286 }
5287
5288 # Print context lines and then rem/add lines.
5289 sub print_diff_lines {
5290         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5291         my $is_combined = $num_parents > 1;
5292
5293         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5294                 $num_parents);
5295
5296         if ($diff_style eq 'sidebyside' && !$is_combined) {
5297                 print_sidebyside_diff_lines($ctx, $rem, $add);
5298         } else {
5299                 # default 'inline' style and unknown styles
5300                 print_inline_diff_lines($ctx, $rem, $add);
5301         }
5302 }
5303
5304 sub print_diff_chunk {
5305         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5306         my (@ctx, @rem, @add);
5307
5308         # The class of the previous line.
5309         my $prev_class = '';
5310
5311         return unless @chunk;
5312
5313         # incomplete last line might be among removed or added lines,
5314         # or both, or among context lines: find which
5315         for (my $i = 1; $i < @chunk; $i++) {
5316                 if ($chunk[$i][0] eq 'incomplete') {
5317                         $chunk[$i][0] = $chunk[$i-1][0];
5318                 }
5319         }
5320
5321         # guardian
5322         push @chunk, ["", ""];
5323
5324         foreach my $line_info (@chunk) {
5325                 my ($class, $line) = @$line_info;
5326
5327                 # print chunk headers
5328                 if ($class && $class eq 'chunk_header') {
5329                         print format_diff_line($line, $class, $from, $to);
5330                         next;
5331                 }
5332
5333                 ## print from accumulator when have some add/rem lines or end
5334                 # of chunk (flush context lines), or when have add and rem
5335                 # lines and new block is reached (otherwise add/rem lines could
5336                 # be reordered)
5337                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5338                     (@rem && @add && $class ne $prev_class)) {
5339                         print_diff_lines(\@ctx, \@rem, \@add,
5340                                          $diff_style, $num_parents);
5341                         @ctx = @rem = @add = ();
5342                 }
5343
5344                 ## adding lines to accumulator
5345                 # guardian value
5346                 last unless $line;
5347                 # rem, add or change
5348                 if ($class eq 'rem') {
5349                         push @rem, $line;
5350                 } elsif ($class eq 'add') {
5351                         push @add, $line;
5352                 }
5353                 # context line
5354                 if ($class eq 'ctx') {
5355                         push @ctx, $line;
5356                 }
5357
5358                 $prev_class = $class;
5359         }
5360 }
5361
5362 sub git_patchset_body {
5363         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5364         my ($hash_parent) = $hash_parents[0];
5365
5366         my $is_combined = (@hash_parents > 1);
5367         my $patch_idx = 0;
5368         my $patch_number = 0;
5369         my $patch_line;
5370         my $diffinfo;
5371         my $to_name;
5372         my (%from, %to);
5373         my @chunk; # for side-by-side diff
5374
5375         print "<div class=\"patchset\">\n";
5376
5377         # skip to first patch
5378         while ($patch_line = <$fd>) {
5379                 chomp $patch_line;
5380
5381                 last if ($patch_line =~ m/^diff /);
5382         }
5383
5384  PATCH:
5385         while ($patch_line) {
5386
5387                 # parse "git diff" header line
5388                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5389                         # $1 is from_name, which we do not use
5390                         $to_name = unquote($2);
5391                         $to_name =~ s!^b/!!;
5392                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5393                         # $1 is 'cc' or 'combined', which we do not use
5394                         $to_name = unquote($2);
5395                 } else {
5396                         $to_name = undef;
5397                 }
5398
5399                 # check if current patch belong to current raw line
5400                 # and parse raw git-diff line if needed
5401                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5402                         # this is continuation of a split patch
5403                         print "<div class=\"patch cont\">\n";
5404                 } else {
5405                         # advance raw git-diff output if needed
5406                         $patch_idx++ if defined $diffinfo;
5407
5408                         # read and prepare patch information
5409                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5410
5411                         # compact combined diff output can have some patches skipped
5412                         # find which patch (using pathname of result) we are at now;
5413                         if ($is_combined) {
5414                                 while ($to_name ne $diffinfo->{'to_file'}) {
5415                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5416                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5417                                               "</div>\n";  # class="patch"
5418
5419                                         $patch_idx++;
5420                                         $patch_number++;
5421
5422                                         last if $patch_idx > $#$difftree;
5423                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5424                                 }
5425                         }
5426
5427                         # modifies %from, %to hashes
5428                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5429
5430                         # this is first patch for raw difftree line with $patch_idx index
5431                         # we index @$difftree array from 0, but number patches from 1
5432                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5433                 }
5434
5435                 # git diff header
5436                 #assert($patch_line =~ m/^diff /) if DEBUG;
5437                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5438                 $patch_number++;
5439                 # print "git diff" header
5440                 print format_git_diff_header_line($patch_line, $diffinfo,
5441                                                   \%from, \%to);
5442
5443                 # print extended diff header
5444                 print "<div class=\"diff extended_header\">\n";
5445         EXTENDED_HEADER:
5446                 while ($patch_line = <$fd>) {
5447                         chomp $patch_line;
5448
5449                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5450
5451                         print format_extended_diff_header_line($patch_line, $diffinfo,
5452                                                                \%from, \%to);
5453                 }
5454                 print "</div>\n"; # class="diff extended_header"
5455
5456                 # from-file/to-file diff header
5457                 if (! $patch_line) {
5458                         print "</div>\n"; # class="patch"
5459                         last PATCH;
5460                 }
5461                 next PATCH if ($patch_line =~ m/^diff /);
5462                 #assert($patch_line =~ m/^---/) if DEBUG;
5463
5464                 my $last_patch_line = $patch_line;
5465                 $patch_line = <$fd>;
5466                 chomp $patch_line;
5467                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5468
5469                 print format_diff_from_to_header($last_patch_line, $patch_line,
5470                                                  $diffinfo, \%from, \%to,
5471                                                  @hash_parents);
5472
5473                 # the patch itself
5474         LINE:
5475                 while ($patch_line = <$fd>) {
5476                         chomp $patch_line;
5477
5478                         next PATCH if ($patch_line =~ m/^diff /);
5479
5480                         my $class = diff_line_class($patch_line, \%from, \%to);
5481
5482                         if ($class eq 'chunk_header') {
5483                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5484                                 @chunk = ();
5485                         }
5486
5487                         push @chunk, [ $class, $patch_line ];
5488                 }
5489
5490         } continue {
5491                 if (@chunk) {
5492                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5493                         @chunk = ();
5494                 }
5495                 print "</div>\n"; # class="patch"
5496         }
5497
5498         # for compact combined (--cc) format, with chunk and patch simplification
5499         # the patchset might be empty, but there might be unprocessed raw lines
5500         for (++$patch_idx if $patch_number > 0;
5501              $patch_idx < @$difftree;
5502              ++$patch_idx) {
5503                 # read and prepare patch information
5504                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5505
5506                 # generate anchor for "patch" links in difftree / whatchanged part
5507                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5508                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5509                       "</div>\n";  # class="patch"
5510
5511                 $patch_number++;
5512         }
5513
5514         if ($patch_number == 0) {
5515                 if (@hash_parents > 1) {
5516                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5517                 } else {
5518                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5519                 }
5520         }
5521
5522         print "</div>\n"; # class="patchset"
5523 }
5524
5525 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5526
5527 sub git_project_search_form {
5528         my ($searchtext, $search_use_regexp) = @_;
5529
5530         my $limit = '';
5531         if ($project_filter) {
5532                 $limit = " in '$project_filter/'";
5533         }
5534
5535         print "<div class=\"projsearch\">\n";
5536         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5537               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5538         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5539                 if (defined $project_filter);
5540         print $cgi->textfield(-name => 's', -value => $searchtext,
5541                               -title => "Search project by name and description$limit",
5542                               -size => 60) . "\n" .
5543               "<span title=\"Extended regular expression\">" .
5544               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5545                              -checked => $search_use_regexp) .
5546               "</span>\n" .
5547               $cgi->submit(-name => 'btnS', -value => 'Search') .
5548               $cgi->end_form() . "\n" .
5549               $cgi->a({-href => href(project => undef, searchtext => undef,
5550                                      project_filter => $project_filter)},
5551                       esc_html("List all projects$limit")) . "<br />\n";
5552         print "</div>\n";
5553 }
5554
5555 # entry for given @keys needs filling if at least one of keys in list
5556 # is not present in %$project_info
5557 sub project_info_needs_filling {
5558         my ($project_info, @keys) = @_;
5559
5560         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5561         foreach my $key (@keys) {
5562                 if (!exists $project_info->{$key}) {
5563                         return 1;
5564                 }
5565         }
5566         return;
5567 }
5568
5569 # fills project list info (age, description, owner, category, forks, etc.)
5570 # for each project in the list, removing invalid projects from
5571 # returned list, or fill only specified info.
5572 #
5573 # Invalid projects are removed from the returned list if and only if you
5574 # ask 'age' or 'age_string' to be filled, because they are the only fields
5575 # that run unconditionally git command that requires repository, and
5576 # therefore do always check if project repository is invalid.
5577 #
5578 # USAGE:
5579 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5580 #   ensures that 'descr_long' and 'ctags' fields are filled
5581 # * @project_list = fill_project_list_info(\@project_list)
5582 #   ensures that all fields are filled (and invalid projects removed)
5583 #
5584 # NOTE: modifies $projlist, but does not remove entries from it
5585 sub fill_project_list_info {
5586         my ($projlist, @wanted_keys) = @_;
5587         my @projects;
5588         my $filter_set = sub { return @_; };
5589         if (@wanted_keys) {
5590                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5591                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5592         }
5593
5594         my $show_ctags = gitweb_check_feature('ctags');
5595  PROJECT:
5596         foreach my $pr (@$projlist) {
5597                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5598                         my (@activity) = git_get_last_activity($pr->{'path'});
5599                         unless (@activity) {
5600                                 next PROJECT;
5601                         }
5602                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5603                 }
5604                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5605                         my $descr = git_get_project_description($pr->{'path'}) || "";
5606                         $descr = to_utf8($descr);
5607                         $pr->{'descr_long'} = $descr;
5608                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5609                 }
5610                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5611                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5612                 }
5613                 if ($show_ctags &&
5614                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5615                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5616                 }
5617                 if ($projects_list_group_categories &&
5618                     project_info_needs_filling($pr, $filter_set->('category'))) {
5619                         my $cat = git_get_project_category($pr->{'path'}) ||
5620                                                            $project_list_default_category;
5621                         $pr->{'category'} = to_utf8($cat);
5622                 }
5623
5624                 push @projects, $pr;
5625         }
5626
5627         return @projects;
5628 }
5629
5630 sub sort_projects_list {
5631         my ($projlist, $order) = @_;
5632
5633         sub order_str {
5634                 my $key = shift;
5635                 return sub { $a->{$key} cmp $b->{$key} };
5636         }
5637
5638         sub order_num_then_undef {
5639                 my $key = shift;
5640                 return sub {
5641                         defined $a->{$key} ?
5642                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5643                                 (defined $b->{$key} ? 1 : 0)
5644                 };
5645         }
5646
5647         my %orderings = (
5648                 project => order_str('path'),
5649                 descr => order_str('descr_long'),
5650                 owner => order_str('owner'),
5651                 age => order_num_then_undef('age'),
5652         );
5653
5654         my $ordering = $orderings{$order};
5655         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5656 }
5657
5658 # returns a hash of categories, containing the list of project
5659 # belonging to each category
5660 sub build_projlist_by_category {
5661         my ($projlist, $from, $to) = @_;
5662         my %categories;
5663
5664         $from = 0 unless defined $from;
5665         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5666
5667         for (my $i = $from; $i <= $to; $i++) {
5668                 my $pr = $projlist->[$i];
5669                 push @{$categories{ $pr->{'category'} }}, $pr;
5670         }
5671
5672         return wantarray ? %categories : \%categories;
5673 }
5674
5675 # print 'sort by' <th> element, generating 'sort by $name' replay link
5676 # if that order is not selected
5677 sub print_sort_th {
5678         print format_sort_th(@_);
5679 }
5680
5681 sub format_sort_th {
5682         my ($name, $order, $header) = @_;
5683         my $sort_th = "";
5684         $header ||= ucfirst($name);
5685
5686         if ($order eq $name) {
5687                 $sort_th .= "<th>$header</th>\n";
5688         } else {
5689                 $sort_th .= "<th>" .
5690                             $cgi->a({-href => href(-replay=>1, order=>$name),
5691                                      -class => "header"}, $header) .
5692                             "</th>\n";
5693         }
5694
5695         return $sort_th;
5696 }
5697
5698 sub git_project_list_rows {
5699         my ($projlist, $from, $to, $check_forks) = @_;
5700
5701         $from = 0 unless defined $from;
5702         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5703
5704         my $alternate = 1;
5705         for (my $i = $from; $i <= $to; $i++) {
5706                 my $pr = $projlist->[$i];
5707
5708                 if ($alternate) {
5709                         print "<tr class=\"dark\">\n";
5710                 } else {
5711                         print "<tr class=\"light\">\n";
5712                 }
5713                 $alternate ^= 1;
5714
5715                 if ($check_forks) {
5716                         print "<td>";
5717                         if ($pr->{'forks'}) {
5718                                 my $nforks = scalar @{$pr->{'forks'}};
5719                                 if ($nforks > 0) {
5720                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5721                                                        -title => "$nforks forks"}, "+");
5722                                 } else {
5723                                         print $cgi->span({-title => "$nforks forks"}, "+");
5724                                 }
5725                         }
5726                         print "</td>\n";
5727                 }
5728                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5729                                         -class => "list"},
5730                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5731                       "</td>\n" .
5732                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5733                                         -class => "list",
5734                                         -title => $pr->{'descr_long'}},
5735                                         $search_regexp
5736                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5737                                                                     $pr->{'descr'}, $search_regexp)
5738                                         : esc_html($pr->{'descr'})) .
5739                       "</td>\n";
5740                 unless ($omit_owner) {
5741                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5742                 }
5743                 unless ($omit_age_column) {
5744                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5745                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5746                 }
5747                 print"<td class=\"link\">" .
5748                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5749                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5750                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5751                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5752                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5753                       "</td>\n" .
5754                       "</tr>\n";
5755         }
5756 }
5757
5758 sub git_project_list_body {
5759         # actually uses global variable $project
5760         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5761         my @projects = @$projlist;
5762
5763         my $check_forks = gitweb_check_feature('forks');
5764         my $show_ctags  = gitweb_check_feature('ctags');
5765         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5766         $check_forks = undef
5767                 if ($tagfilter || $search_regexp);
5768
5769         # filtering out forks before filling info allows to do less work
5770         @projects = filter_forks_from_projects_list(\@projects)
5771                 if ($check_forks);
5772         # search_projects_list pre-fills required info
5773         @projects = search_projects_list(\@projects,
5774                                          'search_regexp' => $search_regexp,
5775                                          'tagfilter'  => $tagfilter)
5776                 if ($tagfilter || $search_regexp);
5777         # fill the rest
5778         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5779         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5780         push @all_fields, 'owner' unless($omit_owner);
5781         @projects = fill_project_list_info(\@projects, @all_fields);
5782
5783         $order ||= $default_projects_order;
5784         $from = 0 unless defined $from;
5785         $to = $#projects if (!defined $to || $#projects < $to);
5786
5787         # short circuit
5788         if ($from > $to) {
5789                 print "<center>\n".
5790                       "<b>No such projects found</b><br />\n".
5791                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5792                       "</center>\n<br />\n";
5793                 return;
5794         }
5795
5796         @projects = sort_projects_list(\@projects, $order);
5797
5798         if ($show_ctags) {
5799                 my $ctags = git_gather_all_ctags(\@projects);
5800                 my $cloud = git_populate_project_tagcloud($ctags);
5801                 print git_show_project_tagcloud($cloud, 64);
5802         }
5803
5804         print "<table class=\"project_list\">\n";
5805         unless ($no_header) {
5806                 print "<tr>\n";
5807                 if ($check_forks) {
5808                         print "<th></th>\n";
5809                 }
5810                 print_sort_th('project', $order, 'Project');
5811                 print_sort_th('descr', $order, 'Description');
5812                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5813                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5814                 print "<th></th>\n" . # for links
5815                       "</tr>\n";
5816         }
5817
5818         if ($projects_list_group_categories) {
5819                 # only display categories with projects in the $from-$to window
5820                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5821                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5822                 foreach my $cat (sort keys %categories) {
5823                         unless ($cat eq "") {
5824                                 print "<tr>\n";
5825                                 if ($check_forks) {
5826                                         print "<td></td>\n";
5827                                 }
5828                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5829                                 print "</tr>\n";
5830                         }
5831
5832                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5833                 }
5834         } else {
5835                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5836         }
5837
5838         if (defined $extra) {
5839                 print "<tr>\n";
5840                 if ($check_forks) {
5841                         print "<td></td>\n";
5842                 }
5843                 print "<td colspan=\"5\">$extra</td>\n" .
5844                       "</tr>\n";
5845         }
5846         print "</table>\n";
5847 }
5848
5849 sub git_log_body {
5850         # uses global variable $project
5851         my ($commitlist, $from, $to, $refs, $extra) = @_;
5852
5853         $from = 0 unless defined $from;
5854         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5855
5856         for (my $i = 0; $i <= $to; $i++) {
5857                 my %co = %{$commitlist->[$i]};
5858                 next if !%co;
5859                 my $commit = $co{'id'};
5860                 my $ref = format_ref_marker($refs, $commit);
5861                 git_print_header_div('commit',
5862                                "<span class=\"age\">$co{'age_string'}</span>" .
5863                                esc_html($co{'title'}) . $ref,
5864                                $commit);
5865                 print "<div class=\"title_text\">\n" .
5866                       "<div class=\"log_link\">\n" .
5867                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5868                       " | " .
5869                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5870                       " | " .
5871                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5872                       "<br/>\n" .
5873                       "</div>\n";
5874                       git_print_authorship(\%co, -tag => 'span');
5875                       print "<br/>\n</div>\n";
5876
5877                 print "<div class=\"log_body\">\n";
5878                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5879                 print "</div>\n";
5880         }
5881         if ($extra) {
5882                 print "<div class=\"page_nav\">\n";
5883                 print "$extra\n";
5884                 print "</div>\n";
5885         }
5886 }
5887
5888 sub git_shortlog_body {
5889         # uses global variable $project
5890         my ($commitlist, $from, $to, $refs, $extra) = @_;
5891
5892         $from = 0 unless defined $from;
5893         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5894
5895         print "<table class=\"shortlog\">\n";
5896         my $alternate = 1;
5897         for (my $i = $from; $i <= $to; $i++) {
5898                 my %co = %{$commitlist->[$i]};
5899                 my $commit = $co{'id'};
5900                 my $ref = format_ref_marker($refs, $commit);
5901                 if ($alternate) {
5902                         print "<tr class=\"dark\">\n";
5903                 } else {
5904                         print "<tr class=\"light\">\n";
5905                 }
5906                 $alternate ^= 1;
5907                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5908                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5909                       format_author_html('td', \%co, 10) . "<td>";
5910                 print format_subject_html($co{'title'}, $co{'title_short'},
5911                                           href(action=>"commit", hash=>$commit), $ref);
5912                 print "</td>\n" .
5913                       "<td class=\"link\">" .
5914                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5915                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5916                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5917                 my $snapshot_links = format_snapshot_links($commit);
5918                 if (defined $snapshot_links) {
5919                         print " | " . $snapshot_links;
5920                 }
5921                 print "</td>\n" .
5922                       "</tr>\n";
5923         }
5924         if (defined $extra) {
5925                 print "<tr>\n" .
5926                       "<td colspan=\"4\">$extra</td>\n" .
5927                       "</tr>\n";
5928         }
5929         print "</table>\n";
5930 }
5931
5932 sub git_history_body {
5933         # Warning: assumes constant type (blob or tree) during history
5934         my ($commitlist, $from, $to, $refs, $extra,
5935             $file_name, $file_hash, $ftype) = @_;
5936
5937         $from = 0 unless defined $from;
5938         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5939
5940         print "<table class=\"history\">\n";
5941         my $alternate = 1;
5942         for (my $i = $from; $i <= $to; $i++) {
5943                 my %co = %{$commitlist->[$i]};
5944                 if (!%co) {
5945                         next;
5946                 }
5947                 my $commit = $co{'id'};
5948
5949                 my $ref = format_ref_marker($refs, $commit);
5950
5951                 if ($alternate) {
5952                         print "<tr class=\"dark\">\n";
5953                 } else {
5954                         print "<tr class=\"light\">\n";
5955                 }
5956                 $alternate ^= 1;
5957                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5958         # shortlog:   format_author_html('td', \%co, 10)
5959                       format_author_html('td', \%co, 15, 3) . "<td>";
5960                 # originally git_history used chop_str($co{'title'}, 50)
5961                 print format_subject_html($co{'title'}, $co{'title_short'},
5962                                           href(action=>"commit", hash=>$commit), $ref);
5963                 print "</td>\n" .
5964                       "<td class=\"link\">" .
5965                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5966                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5967
5968                 if ($ftype eq 'blob') {
5969                         my $blob_current = $file_hash;
5970                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5971                         if (defined $blob_current && defined $blob_parent &&
5972                                         $blob_current ne $blob_parent) {
5973                                 print " | " .
5974                                         $cgi->a({-href => href(action=>"blobdiff",
5975                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5976                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5977                                                                file_name=>$file_name)},
5978                                                 "diff to current");
5979                         }
5980                 }
5981                 print "</td>\n" .
5982                       "</tr>\n";
5983         }
5984         if (defined $extra) {
5985                 print "<tr>\n" .
5986                       "<td colspan=\"4\">$extra</td>\n" .
5987                       "</tr>\n";
5988         }
5989         print "</table>\n";
5990 }
5991
5992 sub git_tags_body {
5993         # uses global variable $project
5994         my ($taglist, $from, $to, $extra) = @_;
5995         $from = 0 unless defined $from;
5996         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5997
5998         print "<table class=\"tags\">\n";
5999         my $alternate = 1;
6000         for (my $i = $from; $i <= $to; $i++) {
6001                 my $entry = $taglist->[$i];
6002                 my %tag = %$entry;
6003                 my $comment = $tag{'subject'};
6004                 my $comment_short;
6005                 if (defined $comment) {
6006                         $comment_short = chop_str($comment, 30, 5);
6007                 }
6008                 if ($alternate) {
6009                         print "<tr class=\"dark\">\n";
6010                 } else {
6011                         print "<tr class=\"light\">\n";
6012                 }
6013                 $alternate ^= 1;
6014                 if (defined $tag{'age'}) {
6015                         print "<td><i>$tag{'age'}</i></td>\n";
6016                 } else {
6017                         print "<td></td>\n";
6018                 }
6019                 print "<td>" .
6020                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6021                                -class => "list name"}, esc_html($tag{'name'})) .
6022                       "</td>\n" .
6023                       "<td>";
6024                 if (defined $comment) {
6025                         print format_subject_html($comment, $comment_short,
6026                                                   href(action=>"tag", hash=>$tag{'id'}));
6027                 }
6028                 print "</td>\n" .
6029                       "<td class=\"selflink\">";
6030                 if ($tag{'type'} eq "tag") {
6031                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6032                 } else {
6033                         print "&nbsp;";
6034                 }
6035                 print "</td>\n" .
6036                       "<td class=\"link\">" . " | " .
6037                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6038                 if ($tag{'reftype'} eq "commit") {
6039                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6040                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6041                 } elsif ($tag{'reftype'} eq "blob") {
6042                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6043                 }
6044                 print "</td>\n" .
6045                       "</tr>";
6046         }
6047         if (defined $extra) {
6048                 print "<tr>\n" .
6049                       "<td colspan=\"5\">$extra</td>\n" .
6050                       "</tr>\n";
6051         }
6052         print "</table>\n";
6053 }
6054
6055 sub git_heads_body {
6056         # uses global variable $project
6057         my ($headlist, $head_at, $from, $to, $extra) = @_;
6058         $from = 0 unless defined $from;
6059         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6060
6061         print "<table class=\"heads\">\n";
6062         my $alternate = 1;
6063         for (my $i = $from; $i <= $to; $i++) {
6064                 my $entry = $headlist->[$i];
6065                 my %ref = %$entry;
6066                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6067                 if ($alternate) {
6068                         print "<tr class=\"dark\">\n";
6069                 } else {
6070                         print "<tr class=\"light\">\n";
6071                 }
6072                 $alternate ^= 1;
6073                 print "<td><i>$ref{'age'}</i></td>\n" .
6074                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6075                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6076                                -class => "list name"},esc_html($ref{'name'})) .
6077                       "</td>\n" .
6078                       "<td class=\"link\">" .
6079                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6080                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6081                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6082                       "</td>\n" .
6083                       "</tr>";
6084         }
6085         if (defined $extra) {
6086                 print "<tr>\n" .
6087                       "<td colspan=\"3\">$extra</td>\n" .
6088                       "</tr>\n";
6089         }
6090         print "</table>\n";
6091 }
6092
6093 # Display a single remote block
6094 sub git_remote_block {
6095         my ($remote, $rdata, $limit, $head) = @_;
6096
6097         my $heads = $rdata->{'heads'};
6098         my $fetch = $rdata->{'fetch'};
6099         my $push = $rdata->{'push'};
6100
6101         my $urls_table = "<table class=\"projects_list\">\n" ;
6102
6103         if (defined $fetch) {
6104                 if ($fetch eq $push) {
6105                         $urls_table .= format_repo_url("URL", $fetch);
6106                 } else {
6107                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6108                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6109                 }
6110         } elsif (defined $push) {
6111                 $urls_table .= format_repo_url("Push URL", $push);
6112         } else {
6113                 $urls_table .= format_repo_url("", "No remote URL");
6114         }
6115
6116         $urls_table .= "</table>\n";
6117
6118         my $dots;
6119         if (defined $limit && $limit < @$heads) {
6120                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6121         }
6122
6123         print $urls_table;
6124         git_heads_body($heads, $head, 0, $limit, $dots);
6125 }
6126
6127 # Display a list of remote names with the respective fetch and push URLs
6128 sub git_remotes_list {
6129         my ($remotedata, $limit) = @_;
6130         print "<table class=\"heads\">\n";
6131         my $alternate = 1;
6132         my @remotes = sort keys %$remotedata;
6133
6134         my $limited = $limit && $limit < @remotes;
6135
6136         $#remotes = $limit - 1 if $limited;
6137
6138         while (my $remote = shift @remotes) {
6139                 my $rdata = $remotedata->{$remote};
6140                 my $fetch = $rdata->{'fetch'};
6141                 my $push = $rdata->{'push'};
6142                 if ($alternate) {
6143                         print "<tr class=\"dark\">\n";
6144                 } else {
6145                         print "<tr class=\"light\">\n";
6146                 }
6147                 $alternate ^= 1;
6148                 print "<td>" .
6149                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6150                                -class=> "list name"},esc_html($remote)) .
6151                       "</td>";
6152                 print "<td class=\"link\">" .
6153                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6154                       " | " .
6155                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6156                       "</td>";
6157
6158                 print "</tr>\n";
6159         }
6160
6161         if ($limited) {
6162                 print "<tr>\n" .
6163                       "<td colspan=\"3\">" .
6164                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6165                       "</td>\n" . "</tr>\n";
6166         }
6167
6168         print "</table>";
6169 }
6170
6171 # Display remote heads grouped by remote, unless there are too many
6172 # remotes, in which case we only display the remote names
6173 sub git_remotes_body {
6174         my ($remotedata, $limit, $head) = @_;
6175         if ($limit and $limit < keys %$remotedata) {
6176                 git_remotes_list($remotedata, $limit);
6177         } else {
6178                 fill_remote_heads($remotedata);
6179                 while (my ($remote, $rdata) = each %$remotedata) {
6180                         git_print_section({-class=>"remote", -id=>$remote},
6181                                 ["remotes", $remote, $remote], sub {
6182                                         git_remote_block($remote, $rdata, $limit, $head);
6183                                 });
6184                 }
6185         }
6186 }
6187
6188 sub git_search_message {
6189         my %co = @_;
6190
6191         my $greptype;
6192         if ($searchtype eq 'commit') {
6193                 $greptype = "--grep=";
6194         } elsif ($searchtype eq 'author') {
6195                 $greptype = "--author=";
6196         } elsif ($searchtype eq 'committer') {
6197                 $greptype = "--committer=";
6198         }
6199         $greptype .= $searchtext;
6200         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6201                                        $greptype, '--regexp-ignore-case',
6202                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6203
6204         my $paging_nav = '';
6205         if ($page > 0) {
6206                 $paging_nav .=
6207                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6208                                 "first") .
6209                         " &sdot; " .
6210                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6211                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6212         } else {
6213                 $paging_nav .= "first &sdot; prev";
6214         }
6215         my $next_link = '';
6216         if ($#commitlist >= 100) {
6217                 $next_link =
6218                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6219                                  -accesskey => "n", -title => "Alt-n"}, "next");
6220                 $paging_nav .= " &sdot; $next_link";
6221         } else {
6222                 $paging_nav .= " &sdot; next";
6223         }
6224
6225         git_header_html();
6226
6227         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6228         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6229         if ($page == 0 && !@commitlist) {
6230                 print "<p>No match.</p>\n";
6231         } else {
6232                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6233         }
6234
6235         git_footer_html();
6236 }
6237
6238 sub git_search_changes {
6239         my %co = @_;
6240
6241         local $/ = "\n";
6242         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6243                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6244                 ($search_use_regexp ? '--pickaxe-regex' : ())
6245                         or die_error(500, "Open git-log failed");
6246
6247         git_header_html();
6248
6249         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6250         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6251
6252         print "<table class=\"pickaxe search\">\n";
6253         my $alternate = 1;
6254         undef %co;
6255         my @files;
6256         while (my $line = <$fd>) {
6257                 chomp $line;
6258                 next unless $line;
6259
6260                 my %set = parse_difftree_raw_line($line);
6261                 if (defined $set{'commit'}) {
6262                         # finish previous commit
6263                         if (%co) {
6264                                 print "</td>\n" .
6265                                       "<td class=\"link\">" .
6266                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6267                                               "commit") .
6268                                       " | " .
6269                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6270                                                              hash_base=>$co{'id'})},
6271                                               "tree") .
6272                                       "</td>\n" .
6273                                       "</tr>\n";
6274                         }
6275
6276                         if ($alternate) {
6277                                 print "<tr class=\"dark\">\n";
6278                         } else {
6279                                 print "<tr class=\"light\">\n";
6280                         }
6281                         $alternate ^= 1;
6282                         %co = parse_commit($set{'commit'});
6283                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6284                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6285                               "<td><i>$author</i></td>\n" .
6286                               "<td>" .
6287                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6288                                       -class => "list subject"},
6289                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6290                 } elsif (defined $set{'to_id'}) {
6291                         next if ($set{'to_id'} =~ m/^0{40}$/);
6292
6293                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6294                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6295                                       -class => "list"},
6296                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6297                               "<br/>\n";
6298                 }
6299         }
6300         close $fd;
6301
6302         # finish last commit (warning: repetition!)
6303         if (%co) {
6304                 print "</td>\n" .
6305                       "<td class=\"link\">" .
6306                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6307                               "commit") .
6308                       " | " .
6309                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6310                                              hash_base=>$co{'id'})},
6311                               "tree") .
6312                       "</td>\n" .
6313                       "</tr>\n";
6314         }
6315
6316         print "</table>\n";
6317
6318         git_footer_html();
6319 }
6320
6321 sub git_search_files {
6322         my %co = @_;
6323
6324         local $/ = "\n";
6325         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6326                 $search_use_regexp ? ('-E', '-i') : '-F',
6327                 $searchtext, $co{'tree'}
6328                         or die_error(500, "Open git-grep failed");
6329
6330         git_header_html();
6331
6332         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6333         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6334
6335         print "<table class=\"grep_search\">\n";
6336         my $alternate = 1;
6337         my $matches = 0;
6338         my $lastfile = '';
6339         my $file_href;
6340         while (my $line = <$fd>) {
6341                 chomp $line;
6342                 my ($file, $lno, $ltext, $binary);
6343                 last if ($matches++ > 1000);
6344                 if ($line =~ /^Binary file (.+) matches$/) {
6345                         $file = $1;
6346                         $binary = 1;
6347                 } else {
6348                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6349                         $file =~ s/^$co{'tree'}://;
6350                 }
6351                 if ($file ne $lastfile) {
6352                         $lastfile and print "</td></tr>\n";
6353                         if ($alternate++) {
6354                                 print "<tr class=\"dark\">\n";
6355                         } else {
6356                                 print "<tr class=\"light\">\n";
6357                         }
6358                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6359                                           file_name=>$file);
6360                         print "<td class=\"list\">".
6361                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6362                         print "</td><td>\n";
6363                         $lastfile = $file;
6364                 }
6365                 if ($binary) {
6366                         print "<div class=\"binary\">Binary file</div>\n";
6367                 } else {
6368                         $ltext = untabify($ltext);
6369                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6370                                 $ltext = esc_html($1, -nbsp=>1);
6371                                 $ltext .= '<span class="match">';
6372                                 $ltext .= esc_html($2, -nbsp=>1);
6373                                 $ltext .= '</span>';
6374                                 $ltext .= esc_html($3, -nbsp=>1);
6375                         } else {
6376                                 $ltext = esc_html($ltext, -nbsp=>1);
6377                         }
6378                         print "<div class=\"pre\">" .
6379                                 $cgi->a({-href => $file_href.'#l'.$lno,
6380                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6381                                 ' ' .  $ltext . "</div>\n";
6382                 }
6383         }
6384         if ($lastfile) {
6385                 print "</td></tr>\n";
6386                 if ($matches > 1000) {
6387                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6388                 }
6389         } else {
6390                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6391         }
6392         close $fd;
6393
6394         print "</table>\n";
6395
6396         git_footer_html();
6397 }
6398
6399 sub git_search_grep_body {
6400         my ($commitlist, $from, $to, $extra) = @_;
6401         $from = 0 unless defined $from;
6402         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6403
6404         print "<table class=\"commit_search\">\n";
6405         my $alternate = 1;
6406         for (my $i = $from; $i <= $to; $i++) {
6407                 my %co = %{$commitlist->[$i]};
6408                 if (!%co) {
6409                         next;
6410                 }
6411                 my $commit = $co{'id'};
6412                 if ($alternate) {
6413                         print "<tr class=\"dark\">\n";
6414                 } else {
6415                         print "<tr class=\"light\">\n";
6416                 }
6417                 $alternate ^= 1;
6418                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6419                       format_author_html('td', \%co, 15, 5) .
6420                       "<td>" .
6421                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6422                                -class => "list subject"},
6423                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6424                 my $comment = $co{'comment'};
6425                 foreach my $line (@$comment) {
6426                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6427                                 my ($lead, $match, $trail) = ($1, $2, $3);
6428                                 $match = chop_str($match, 70, 5, 'center');
6429                                 my $contextlen = int((80 - length($match))/2);
6430                                 $contextlen = 30 if ($contextlen > 30);
6431                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6432                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6433
6434                                 $lead  = esc_html($lead);
6435                                 $match = esc_html($match);
6436                                 $trail = esc_html($trail);
6437
6438                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6439                         }
6440                 }
6441                 print "</td>\n" .
6442                       "<td class=\"link\">" .
6443                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6444                       " | " .
6445                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6446                       " | " .
6447                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6448                 print "</td>\n" .
6449                       "</tr>\n";
6450         }
6451         if (defined $extra) {
6452                 print "<tr>\n" .
6453                       "<td colspan=\"3\">$extra</td>\n" .
6454                       "</tr>\n";
6455         }
6456         print "</table>\n";
6457 }
6458
6459 ## ======================================================================
6460 ## ======================================================================
6461 ## actions
6462
6463 sub git_project_list {
6464         my $order = $input_params{'order'};
6465         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6466                 die_error(400, "Unknown order parameter");
6467         }
6468
6469         my @list = git_get_projects_list($project_filter, $strict_export);
6470         if (!@list) {
6471                 die_error(404, "No projects found");
6472         }
6473
6474         git_header_html();
6475         if (defined $home_text && -f $home_text) {
6476                 print "<div class=\"index_include\">\n";
6477                 insert_file($home_text);
6478                 print "</div>\n";
6479         }
6480
6481         git_project_search_form($searchtext, $search_use_regexp);
6482         git_project_list_body(\@list, $order);
6483         git_footer_html();
6484 }
6485
6486 sub git_forks {
6487         my $order = $input_params{'order'};
6488         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6489                 die_error(400, "Unknown order parameter");
6490         }
6491
6492         my $filter = $project;
6493         $filter =~ s/\.git$//;
6494         my @list = git_get_projects_list($filter);
6495         if (!@list) {
6496                 die_error(404, "No forks found");
6497         }
6498
6499         git_header_html();
6500         git_print_page_nav('','');
6501         git_print_header_div('summary', "$project forks");
6502         git_project_list_body(\@list, $order);
6503         git_footer_html();
6504 }
6505
6506 sub git_project_index {
6507         my @projects = git_get_projects_list($project_filter, $strict_export);
6508         if (!@projects) {
6509                 die_error(404, "No projects found");
6510         }
6511
6512         print $cgi->header(
6513                 -type => 'text/plain',
6514                 -charset => 'utf-8',
6515                 -content_disposition => 'inline; filename="index.aux"');
6516
6517         foreach my $pr (@projects) {
6518                 if (!exists $pr->{'owner'}) {
6519                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6520                 }
6521
6522                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6523                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6524                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6525                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6526                 $path  =~ s/ /\+/g;
6527                 $owner =~ s/ /\+/g;
6528
6529                 print "$path $owner\n";
6530         }
6531 }
6532
6533 sub git_summary {
6534         my $descr = git_get_project_description($project) || "none";
6535         my %co = parse_commit("HEAD");
6536         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6537         my $head = $co{'id'};
6538         my $remote_heads = gitweb_check_feature('remote_heads');
6539
6540         my $owner = git_get_project_owner($project);
6541
6542         my $refs = git_get_references();
6543         # These get_*_list functions return one more to allow us to see if
6544         # there are more ...
6545         my @taglist  = git_get_tags_list(16);
6546         my @headlist = git_get_heads_list(16);
6547         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6548         my @forklist;
6549         my $check_forks = gitweb_check_feature('forks');
6550
6551         if ($check_forks) {
6552                 # find forks of a project
6553                 my $filter = $project;
6554                 $filter =~ s/\.git$//;
6555                 @forklist = git_get_projects_list($filter);
6556                 # filter out forks of forks
6557                 @forklist = filter_forks_from_projects_list(\@forklist)
6558                         if (@forklist);
6559         }
6560
6561         git_header_html();
6562         git_print_page_nav('summary','', $head);
6563
6564         print "<div class=\"title\">&nbsp;</div>\n";
6565         print "<table class=\"projects_list\">\n" .
6566               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6567         if ($owner and not $omit_owner) {
6568                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6569         }
6570         if (defined $cd{'rfc2822'}) {
6571                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6572                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6573         }
6574
6575         # use per project git URL list in $projectroot/$project/cloneurl
6576         # or make project git URL from git base URL and project name
6577         my $url_tag = "URL";
6578         my @url_list = git_get_project_url_list($project);
6579         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6580         foreach my $git_url (@url_list) {
6581                 next unless $git_url;
6582                 print format_repo_url($url_tag, $git_url);
6583                 $url_tag = "";
6584         }
6585
6586         # Tag cloud
6587         my $show_ctags = gitweb_check_feature('ctags');
6588         if ($show_ctags) {
6589                 my $ctags = git_get_project_ctags($project);
6590                 if (%$ctags) {
6591                         # without ability to add tags, don't show if there are none
6592                         my $cloud = git_populate_project_tagcloud($ctags);
6593                         print "<tr id=\"metadata_ctags\">" .
6594                               "<td>content tags</td>" .
6595                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6596                               "</tr>\n";
6597                 }
6598         }
6599
6600         print "</table>\n";
6601
6602         # If XSS prevention is on, we don't include README.html.
6603         # TODO: Allow a readme in some safe format.
6604         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6605                 print "<div class=\"title\">readme</div>\n" .
6606                       "<div class=\"readme\">\n";
6607                 insert_file("$projectroot/$project/README.html");
6608                 print "\n</div>\n"; # class="readme"
6609         }
6610
6611         # we need to request one more than 16 (0..15) to check if
6612         # those 16 are all
6613         my @commitlist = $head ? parse_commits($head, 17) : ();
6614         if (@commitlist) {
6615                 git_print_header_div('shortlog');
6616                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6617                                   $#commitlist <=  15 ? undef :
6618                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6619         }
6620
6621         if (@taglist) {
6622                 git_print_header_div('tags');
6623                 git_tags_body(\@taglist, 0, 15,
6624                               $#taglist <=  15 ? undef :
6625                               $cgi->a({-href => href(action=>"tags")}, "..."));
6626         }
6627
6628         if (@headlist) {
6629                 git_print_header_div('heads');
6630                 git_heads_body(\@headlist, $head, 0, 15,
6631                                $#headlist <= 15 ? undef :
6632                                $cgi->a({-href => href(action=>"heads")}, "..."));
6633         }
6634
6635         if (%remotedata) {
6636                 git_print_header_div('remotes');
6637                 git_remotes_body(\%remotedata, 15, $head);
6638         }
6639
6640         if (@forklist) {
6641                 git_print_header_div('forks');
6642                 git_project_list_body(\@forklist, 'age', 0, 15,
6643                                       $#forklist <= 15 ? undef :
6644                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6645                                       'no_header');
6646         }
6647
6648         git_footer_html();
6649 }
6650
6651 sub git_tag {
6652         my %tag = parse_tag($hash);
6653
6654         if (! %tag) {
6655                 die_error(404, "Unknown tag object");
6656         }
6657
6658         my $head = git_get_head_hash($project);
6659         git_header_html();
6660         git_print_page_nav('','', $head,undef,$head);
6661         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6662         print "<div class=\"title_text\">\n" .
6663               "<table class=\"object_header\">\n" .
6664               "<tr>\n" .
6665               "<td>object</td>\n" .
6666               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6667                                $tag{'object'}) . "</td>\n" .
6668               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6669                                               $tag{'type'}) . "</td>\n" .
6670               "</tr>\n";
6671         if (defined($tag{'author'})) {
6672                 git_print_authorship_rows(\%tag, 'author');
6673         }
6674         print "</table>\n\n" .
6675               "</div>\n";
6676         print "<div class=\"page_body\">";
6677         my $comment = $tag{'comment'};
6678         foreach my $line (@$comment) {
6679                 chomp $line;
6680                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6681         }
6682         print "</div>\n";
6683         git_footer_html();
6684 }
6685
6686 sub git_blame_common {
6687         my $format = shift || 'porcelain';
6688         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6689                 $format = 'incremental';
6690                 $action = 'blame_incremental'; # for page title etc
6691         }
6692
6693         # permissions
6694         gitweb_check_feature('blame')
6695                 or die_error(403, "Blame view not allowed");
6696
6697         # error checking
6698         die_error(400, "No file name given") unless $file_name;
6699         $hash_base ||= git_get_head_hash($project);
6700         die_error(404, "Couldn't find base commit") unless $hash_base;
6701         my %co = parse_commit($hash_base)
6702                 or die_error(404, "Commit not found");
6703         my $ftype = "blob";
6704         if (!defined $hash) {
6705                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6706                         or die_error(404, "Error looking up file");
6707         } else {
6708                 $ftype = git_get_type($hash);
6709                 if ($ftype !~ "blob") {
6710                         die_error(400, "Object is not a blob");
6711                 }
6712         }
6713
6714         my $fd;
6715         if ($format eq 'incremental') {
6716                 # get file contents (as base)
6717                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6718                         or die_error(500, "Open git-cat-file failed");
6719         } elsif ($format eq 'data') {
6720                 # run git-blame --incremental
6721                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6722                         $hash_base, "--", $file_name
6723                         or die_error(500, "Open git-blame --incremental failed");
6724         } else {
6725                 # run git-blame --porcelain
6726                 open $fd, "-|", git_cmd(), "blame", '-p',
6727                         $hash_base, '--', $file_name
6728                         or die_error(500, "Open git-blame --porcelain failed");
6729         }
6730         binmode $fd, ':utf8';
6731
6732         # incremental blame data returns early
6733         if ($format eq 'data') {
6734                 print $cgi->header(
6735                         -type=>"text/plain", -charset => "utf-8",
6736                         -status=> "200 OK");
6737                 local $| = 1; # output autoflush
6738                 while (my $line = <$fd>) {
6739                         print to_utf8($line);
6740                 }
6741                 close $fd
6742                         or print "ERROR $!\n";
6743
6744                 print 'END';
6745                 if (defined $t0 && gitweb_check_feature('timed')) {
6746                         print ' '.
6747                               tv_interval($t0, [ gettimeofday() ]).
6748                               ' '.$number_of_git_cmds;
6749                 }
6750                 print "\n";
6751
6752                 return;
6753         }
6754
6755         # page header
6756         git_header_html();
6757         my $formats_nav =
6758                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6759                         "blob") .
6760                 " | ";
6761         if ($format eq 'incremental') {
6762                 $formats_nav .=
6763                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6764                                 "blame") . " (non-incremental)";
6765         } else {
6766                 $formats_nav .=
6767                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6768                                 "blame") . " (incremental)";
6769         }
6770         $formats_nav .=
6771                 " | " .
6772                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6773                         "history") .
6774                 " | " .
6775                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6776                         "HEAD");
6777         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6778         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6779         git_print_page_path($file_name, $ftype, $hash_base);
6780
6781         # page body
6782         if ($format eq 'incremental') {
6783                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6784                       "This page requires JavaScript to run.\n Use ".
6785                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6786                               'this page').
6787                       " instead.\n".
6788                       "</b></center></div>\n</noscript>\n";
6789
6790                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6791         }
6792
6793         print qq!<div class="page_body">\n!;
6794         print qq!<div id="progress_info">... / ...</div>\n!
6795                 if ($format eq 'incremental');
6796         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6797               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6798               qq!<thead>\n!.
6799               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6800               qq!</thead>\n!.
6801               qq!<tbody>\n!;
6802
6803         my @rev_color = qw(light dark);
6804         my $num_colors = scalar(@rev_color);
6805         my $current_color = 0;
6806
6807         if ($format eq 'incremental') {
6808                 my $color_class = $rev_color[$current_color];
6809
6810                 #contents of a file
6811                 my $linenr = 0;
6812         LINE:
6813                 while (my $line = <$fd>) {
6814                         chomp $line;
6815                         $linenr++;
6816
6817                         print qq!<tr id="l$linenr" class="$color_class">!.
6818                               qq!<td class="sha1"><a href=""> </a></td>!.
6819                               qq!<td class="linenr">!.
6820                               qq!<a class="linenr" href="">$linenr</a></td>!;
6821                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6822                         print qq!</tr>\n!;
6823                 }
6824
6825         } else { # porcelain, i.e. ordinary blame
6826                 my %metainfo = (); # saves information about commits
6827
6828                 # blame data
6829         LINE:
6830                 while (my $line = <$fd>) {
6831                         chomp $line;
6832                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6833                         # no <lines in group> for subsequent lines in group of lines
6834                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6835                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6836                         if (!exists $metainfo{$full_rev}) {
6837                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6838                         }
6839                         my $meta = $metainfo{$full_rev};
6840                         my $data;
6841                         while ($data = <$fd>) {
6842                                 chomp $data;
6843                                 last if ($data =~ s/^\t//); # contents of line
6844                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6845                                         $meta->{$1} = $2 unless exists $meta->{$1};
6846                                 }
6847                                 if ($data =~ /^previous /) {
6848                                         $meta->{'nprevious'}++;
6849                                 }
6850                         }
6851                         my $short_rev = substr($full_rev, 0, 8);
6852                         my $author = $meta->{'author'};
6853                         my %date =
6854                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6855                         my $date = $date{'iso-tz'};
6856                         if ($group_size) {
6857                                 $current_color = ($current_color + 1) % $num_colors;
6858                         }
6859                         my $tr_class = $rev_color[$current_color];
6860                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6861                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6862                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6863                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6864                         if ($group_size) {
6865                                 print "<td class=\"sha1\"";
6866                                 print " title=\"". esc_html($author) . ", $date\"";
6867                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6868                                 print ">";
6869                                 print $cgi->a({-href => href(action=>"commit",
6870                                                              hash=>$full_rev,
6871                                                              file_name=>$file_name)},
6872                                               esc_html($short_rev));
6873                                 if ($group_size >= 2) {
6874                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6875                                         if (@author_initials) {
6876                                                 print "<br />" .
6877                                                       esc_html(join('', @author_initials));
6878                                                 #           or join('.', ...)
6879                                         }
6880                                 }
6881                                 print "</td>\n";
6882                         }
6883                         # 'previous' <sha1 of parent commit> <filename at commit>
6884                         if (exists $meta->{'previous'} &&
6885                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6886                                 $meta->{'parent'} = $1;
6887                                 $meta->{'file_parent'} = unquote($2);
6888                         }
6889                         my $linenr_commit =
6890                                 exists($meta->{'parent'}) ?
6891                                 $meta->{'parent'} : $full_rev;
6892                         my $linenr_filename =
6893                                 exists($meta->{'file_parent'}) ?
6894                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6895                         my $blamed = href(action => 'blame',
6896                                           file_name => $linenr_filename,
6897                                           hash_base => $linenr_commit);
6898                         print "<td class=\"linenr\">";
6899                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6900                                         -class => "linenr" },
6901                                       esc_html($lineno));
6902                         print "</td>";
6903                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6904                         print "</tr>\n";
6905                 } # end while
6906
6907         }
6908
6909         # footer
6910         print "</tbody>\n".
6911               "</table>\n"; # class="blame"
6912         print "</div>\n";   # class="blame_body"
6913         close $fd
6914                 or print "Reading blob failed\n";
6915
6916         git_footer_html();
6917 }
6918
6919 sub git_blame {
6920         git_blame_common();
6921 }
6922
6923 sub git_blame_incremental {
6924         git_blame_common('incremental');
6925 }
6926
6927 sub git_blame_data {
6928         git_blame_common('data');
6929 }
6930
6931 sub git_tags {
6932         my $head = git_get_head_hash($project);
6933         git_header_html();
6934         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6935         git_print_header_div('summary', $project);
6936
6937         my @tagslist = git_get_tags_list();
6938         if (@tagslist) {
6939                 git_tags_body(\@tagslist);
6940         }
6941         git_footer_html();
6942 }
6943
6944 sub git_heads {
6945         my $head = git_get_head_hash($project);
6946         git_header_html();
6947         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6948         git_print_header_div('summary', $project);
6949
6950         my @headslist = git_get_heads_list();
6951         if (@headslist) {
6952                 git_heads_body(\@headslist, $head);
6953         }
6954         git_footer_html();
6955 }
6956
6957 # used both for single remote view and for list of all the remotes
6958 sub git_remotes {
6959         gitweb_check_feature('remote_heads')
6960                 or die_error(403, "Remote heads view is disabled");
6961
6962         my $head = git_get_head_hash($project);
6963         my $remote = $input_params{'hash'};
6964
6965         my $remotedata = git_get_remotes_list($remote);
6966         die_error(500, "Unable to get remote information") unless defined $remotedata;
6967
6968         unless (%$remotedata) {
6969                 die_error(404, defined $remote ?
6970                         "Remote $remote not found" :
6971                         "No remotes found");
6972         }
6973
6974         git_header_html(undef, undef, -action_extra => $remote);
6975         git_print_page_nav('', '',  $head, undef, $head,
6976                 format_ref_views($remote ? '' : 'remotes'));
6977
6978         fill_remote_heads($remotedata);
6979         if (defined $remote) {
6980                 git_print_header_div('remotes', "$remote remote for $project");
6981                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6982         } else {
6983                 git_print_header_div('summary', "$project remotes");
6984                 git_remotes_body($remotedata, undef, $head);
6985         }
6986
6987         git_footer_html();
6988 }
6989
6990 sub git_blob_plain {
6991         my $type = shift;
6992         my $expires;
6993
6994         if (!defined $hash) {
6995                 if (defined $file_name) {
6996                         my $base = $hash_base || git_get_head_hash($project);
6997                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6998                                 or die_error(404, "Cannot find file");
6999                 } else {
7000                         die_error(400, "No file name defined");
7001                 }
7002         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7003                 # blobs defined by non-textual hash id's can be cached
7004                 $expires = "+1d";
7005         }
7006
7007         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7008                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7009
7010         # content-type (can include charset)
7011         $type = blob_contenttype($fd, $file_name, $type);
7012
7013         # "save as" filename, even when no $file_name is given
7014         my $save_as = "$hash";
7015         if (defined $file_name) {
7016                 $save_as = $file_name;
7017         } elsif ($type =~ m/^text\//) {
7018                 $save_as .= '.txt';
7019         }
7020
7021         # With XSS prevention on, blobs of all types except a few known safe
7022         # ones are served with "Content-Disposition: attachment" to make sure
7023         # they don't run in our security domain.  For certain image types,
7024         # blob view writes an <img> tag referring to blob_plain view, and we
7025         # want to be sure not to break that by serving the image as an
7026         # attachment (though Firefox 3 doesn't seem to care).
7027         my $sandbox = $prevent_xss &&
7028                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7029
7030         # serve text/* as text/plain
7031         if ($prevent_xss &&
7032             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7033              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7034                 my $rest = $1;
7035                 $rest = defined $rest ? $rest : '';
7036                 $type = "text/plain$rest";
7037         }
7038
7039         print $cgi->header(
7040                 -type => $type,
7041                 -expires => $expires,
7042                 -content_disposition =>
7043                         ($sandbox ? 'attachment' : 'inline')
7044                         . '; filename="' . $save_as . '"');
7045         local $/ = undef;
7046         binmode STDOUT, ':raw';
7047         print <$fd>;
7048         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7049         close $fd;
7050 }
7051
7052 sub git_blob {
7053         my $expires;
7054
7055         if (!defined $hash) {
7056                 if (defined $file_name) {
7057                         my $base = $hash_base || git_get_head_hash($project);
7058                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7059                                 or die_error(404, "Cannot find file");
7060                 } else {
7061                         die_error(400, "No file name defined");
7062                 }
7063         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7064                 # blobs defined by non-textual hash id's can be cached
7065                 $expires = "+1d";
7066         }
7067
7068         my $have_blame = gitweb_check_feature('blame');
7069         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7070                 or die_error(500, "Couldn't cat $file_name, $hash");
7071         my $mimetype = blob_mimetype($fd, $file_name);
7072         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7073         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7074                 close $fd;
7075                 return git_blob_plain($mimetype);
7076         }
7077         # we can have blame only for text/* mimetype
7078         $have_blame &&= ($mimetype =~ m!^text/!);
7079
7080         my $highlight = gitweb_check_feature('highlight');
7081         my $syntax = guess_file_syntax($highlight, $file_name);
7082         $fd = run_highlighter($fd, $highlight, $syntax);
7083
7084         git_header_html(undef, $expires);
7085         my $formats_nav = '';
7086         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7087                 if (defined $file_name) {
7088                         if ($have_blame) {
7089                                 $formats_nav .=
7090                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7091                                                 "blame") .
7092                                         " | ";
7093                         }
7094                         $formats_nav .=
7095                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7096                                         "history") .
7097                                 " | " .
7098                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7099                                         "raw") .
7100                                 " | " .
7101                                 $cgi->a({-href => href(action=>"blob",
7102                                                        hash_base=>"HEAD", file_name=>$file_name)},
7103                                         "HEAD");
7104                 } else {
7105                         $formats_nav .=
7106                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7107                                         "raw");
7108                 }
7109                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7110                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7111         } else {
7112                 print "<div class=\"page_nav\">\n" .
7113                       "<br/><br/></div>\n" .
7114                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7115         }
7116         git_print_page_path($file_name, "blob", $hash_base);
7117         print "<div class=\"page_body\">\n";
7118         if ($mimetype =~ m!^image/!) {
7119                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7120                 if ($file_name) {
7121                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7122                 }
7123                 print qq! src="! .
7124                       href(action=>"blob_plain", hash=>$hash,
7125                            hash_base=>$hash_base, file_name=>$file_name) .
7126                       qq!" />\n!;
7127         } else {
7128                 my $nr;
7129                 while (my $line = <$fd>) {
7130                         chomp $line;
7131                         $nr++;
7132                         $line = untabify($line);
7133                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7134                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7135                                $highlight ? sanitize($line) : esc_html($line, -nbsp=>1);
7136                 }
7137         }
7138         close $fd
7139                 or print "Reading blob failed.\n";
7140         print "</div>";
7141         git_footer_html();
7142 }
7143
7144 sub git_tree {
7145         if (!defined $hash_base) {
7146                 $hash_base = "HEAD";
7147         }
7148         if (!defined $hash) {
7149                 if (defined $file_name) {
7150                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7151                 } else {
7152                         $hash = $hash_base;
7153                 }
7154         }
7155         die_error(404, "No such tree") unless defined($hash);
7156
7157         my $show_sizes = gitweb_check_feature('show-sizes');
7158         my $have_blame = gitweb_check_feature('blame');
7159
7160         my @entries = ();
7161         {
7162                 local $/ = "\0";
7163                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7164                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7165                         or die_error(500, "Open git-ls-tree failed");
7166                 @entries = map { chomp; $_ } <$fd>;
7167                 close $fd
7168                         or die_error(404, "Reading tree failed");
7169         }
7170
7171         my $refs = git_get_references();
7172         my $ref = format_ref_marker($refs, $hash_base);
7173         git_header_html();
7174         my $basedir = '';
7175         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7176                 my @views_nav = ();
7177                 if (defined $file_name) {
7178                         push @views_nav,
7179                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7180                                         "history"),
7181                                 $cgi->a({-href => href(action=>"tree",
7182                                                        hash_base=>"HEAD", file_name=>$file_name)},
7183                                         "HEAD"),
7184                 }
7185                 my $snapshot_links = format_snapshot_links($hash);
7186                 if (defined $snapshot_links) {
7187                         # FIXME: Should be available when we have no hash base as well.
7188                         push @views_nav, $snapshot_links;
7189                 }
7190                 git_print_page_nav('tree','', $hash_base, undef, undef,
7191                                    join(' | ', @views_nav));
7192                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7193         } else {
7194                 undef $hash_base;
7195                 print "<div class=\"page_nav\">\n";
7196                 print "<br/><br/></div>\n";
7197                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7198         }
7199         if (defined $file_name) {
7200                 $basedir = $file_name;
7201                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7202                         $basedir .= '/';
7203                 }
7204                 git_print_page_path($file_name, 'tree', $hash_base);
7205         }
7206         print "<div class=\"page_body\">\n";
7207         print "<table class=\"tree\">\n";
7208         my $alternate = 1;
7209         # '..' (top directory) link if possible
7210         if (defined $hash_base &&
7211             defined $file_name && $file_name =~ m![^/]+$!) {
7212                 if ($alternate) {
7213                         print "<tr class=\"dark\">\n";
7214                 } else {
7215                         print "<tr class=\"light\">\n";
7216                 }
7217                 $alternate ^= 1;
7218
7219                 my $up = $file_name;
7220                 $up =~ s!/?[^/]+$!!;
7221                 undef $up unless $up;
7222                 # based on git_print_tree_entry
7223                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7224                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7225                 print '<td class="list">';
7226                 print $cgi->a({-href => href(action=>"tree",
7227                                              hash_base=>$hash_base,
7228                                              file_name=>$up)},
7229                               "..");
7230                 print "</td>\n";
7231                 print "<td class=\"link\"></td>\n";
7232
7233                 print "</tr>\n";
7234         }
7235         foreach my $line (@entries) {
7236                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7237
7238                 if ($alternate) {
7239                         print "<tr class=\"dark\">\n";
7240                 } else {
7241                         print "<tr class=\"light\">\n";
7242                 }
7243                 $alternate ^= 1;
7244
7245                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7246
7247                 print "</tr>\n";
7248         }
7249         print "</table>\n" .
7250               "</div>";
7251         git_footer_html();
7252 }
7253
7254 sub sanitize_for_filename {
7255     my $name = shift;
7256
7257     $name =~ s!/!-!g;
7258     $name =~ s/[^[:alnum:]_.-]//g;
7259
7260     return $name;
7261 }
7262
7263 sub snapshot_name {
7264         my ($project, $hash) = @_;
7265
7266         # path/to/project.git  -> project
7267         # path/to/project/.git -> project
7268         my $name = to_utf8($project);
7269         $name =~ s,([^/])/*\.git$,$1,;
7270         $name = sanitize_for_filename(basename($name));
7271
7272         my $ver = $hash;
7273         if ($hash =~ /^[0-9a-fA-F]+$/) {
7274                 # shorten SHA-1 hash
7275                 my $full_hash = git_get_full_hash($project, $hash);
7276                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7277                         $ver = git_get_short_hash($project, $hash);
7278                 }
7279         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7280                 # tags don't need shortened SHA-1 hash
7281                 $ver = $1;
7282         } else {
7283                 # branches and other need shortened SHA-1 hash
7284                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7285                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7286                         my $ref_dir = (defined $1) ? $1 : '';
7287                         $ver = $2;
7288
7289                         $ref_dir = sanitize_for_filename($ref_dir);
7290                         # for refs neither in heads nor remotes we want to
7291                         # add a ref dir to archive name
7292                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7293                                 $ver = $ref_dir . '-' . $ver;
7294                         }
7295                 }
7296                 $ver .= '-' . git_get_short_hash($project, $hash);
7297         }
7298         # special case of sanitization for filename - we change
7299         # slashes to dots instead of dashes
7300         # in case of hierarchical branch names
7301         $ver =~ s!/!.!g;
7302         $ver =~ s/[^[:alnum:]_.-]//g;
7303
7304         # name = project-version_string
7305         $name = "$name-$ver";
7306
7307         return wantarray ? ($name, $name) : $name;
7308 }
7309
7310 sub exit_if_unmodified_since {
7311         my ($latest_epoch) = @_;
7312         our $cgi;
7313
7314         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7315         if (defined $if_modified) {
7316                 my $since;
7317                 if (eval { require HTTP::Date; 1; }) {
7318                         $since = HTTP::Date::str2time($if_modified);
7319                 } elsif (eval { require Time::ParseDate; 1; }) {
7320                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7321                 }
7322                 if (defined $since && $latest_epoch <= $since) {
7323                         my %latest_date = parse_date($latest_epoch);
7324                         print $cgi->header(
7325                                 -last_modified => $latest_date{'rfc2822'},
7326                                 -status => '304 Not Modified');
7327                         goto DONE_GITWEB;
7328                 }
7329         }
7330 }
7331
7332 sub git_snapshot {
7333         my $format = $input_params{'snapshot_format'};
7334         if (!@snapshot_fmts) {
7335                 die_error(403, "Snapshots not allowed");
7336         }
7337         # default to first supported snapshot format
7338         $format ||= $snapshot_fmts[0];
7339         if ($format !~ m/^[a-z0-9]+$/) {
7340                 die_error(400, "Invalid snapshot format parameter");
7341         } elsif (!exists($known_snapshot_formats{$format})) {
7342                 die_error(400, "Unknown snapshot format");
7343         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7344                 die_error(403, "Snapshot format not allowed");
7345         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7346                 die_error(403, "Unsupported snapshot format");
7347         }
7348
7349         my $type = git_get_type("$hash^{}");
7350         if (!$type) {
7351                 die_error(404, 'Object does not exist');
7352         }  elsif ($type eq 'blob') {
7353                 die_error(400, 'Object is not a tree-ish');
7354         }
7355
7356         my ($name, $prefix) = snapshot_name($project, $hash);
7357         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7358
7359         my %co = parse_commit($hash);
7360         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7361
7362         my $cmd = quote_command(
7363                 git_cmd(), 'archive',
7364                 "--format=$known_snapshot_formats{$format}{'format'}",
7365                 "--prefix=$prefix/", $hash);
7366         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7367                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7368         }
7369
7370         $filename =~ s/(["\\])/\\$1/g;
7371         my %latest_date;
7372         if (%co) {
7373                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7374         }
7375
7376         print $cgi->header(
7377                 -type => $known_snapshot_formats{$format}{'type'},
7378                 -content_disposition => 'inline; filename="' . $filename . '"',
7379                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7380                 -status => '200 OK');
7381
7382         open my $fd, "-|", $cmd
7383                 or die_error(500, "Execute git-archive failed");
7384         binmode STDOUT, ':raw';
7385         print <$fd>;
7386         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7387         close $fd;
7388 }
7389
7390 sub git_log_generic {
7391         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7392
7393         my $head = git_get_head_hash($project);
7394         if (!defined $base) {
7395                 $base = $head;
7396         }
7397         if (!defined $page) {
7398                 $page = 0;
7399         }
7400         my $refs = git_get_references();
7401
7402         my $commit_hash = $base;
7403         if (defined $parent) {
7404                 $commit_hash = "$parent..$base";
7405         }
7406         my @commitlist =
7407                 parse_commits($commit_hash, 101, (100 * $page),
7408                               defined $file_name ? ($file_name, "--full-history") : ());
7409
7410         my $ftype;
7411         if (!defined $file_hash && defined $file_name) {
7412                 # some commits could have deleted file in question,
7413                 # and not have it in tree, but one of them has to have it
7414                 for (my $i = 0; $i < @commitlist; $i++) {
7415                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7416                         last if defined $file_hash;
7417                 }
7418         }
7419         if (defined $file_hash) {
7420                 $ftype = git_get_type($file_hash);
7421         }
7422         if (defined $file_name && !defined $ftype) {
7423                 die_error(500, "Unknown type of object");
7424         }
7425         my %co;
7426         if (defined $file_name) {
7427                 %co = parse_commit($base)
7428                         or die_error(404, "Unknown commit object");
7429         }
7430
7431
7432         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7433         my $next_link = '';
7434         if ($#commitlist >= 100) {
7435                 $next_link =
7436                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7437                                  -accesskey => "n", -title => "Alt-n"}, "next");
7438         }
7439         my $patch_max = gitweb_get_feature('patches');
7440         if ($patch_max && !defined $file_name) {
7441                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7442                         $paging_nav .= " &sdot; " .
7443                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7444                                         "patches");
7445                 }
7446         }
7447
7448         git_header_html();
7449         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7450         if (defined $file_name) {
7451                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7452         } else {
7453                 git_print_header_div('summary', $project)
7454         }
7455         git_print_page_path($file_name, $ftype, $hash_base)
7456                 if (defined $file_name);
7457
7458         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7459                      $file_name, $file_hash, $ftype);
7460
7461         git_footer_html();
7462 }
7463
7464 sub git_log {
7465         git_log_generic('log', \&git_log_body,
7466                         $hash, $hash_parent);
7467 }
7468
7469 sub git_commit {
7470         $hash ||= $hash_base || "HEAD";
7471         my %co = parse_commit($hash)
7472             or die_error(404, "Unknown commit object");
7473
7474         my $parent  = $co{'parent'};
7475         my $parents = $co{'parents'}; # listref
7476
7477         # we need to prepare $formats_nav before any parameter munging
7478         my $formats_nav;
7479         if (!defined $parent) {
7480                 # --root commitdiff
7481                 $formats_nav .= '(initial)';
7482         } elsif (@$parents == 1) {
7483                 # single parent commit
7484                 $formats_nav .=
7485                         '(parent: ' .
7486                         $cgi->a({-href => href(action=>"commit",
7487                                                hash=>$parent)},
7488                                 esc_html(substr($parent, 0, 7))) .
7489                         ')';
7490         } else {
7491                 # merge commit
7492                 $formats_nav .=
7493                         '(merge: ' .
7494                         join(' ', map {
7495                                 $cgi->a({-href => href(action=>"commit",
7496                                                        hash=>$_)},
7497                                         esc_html(substr($_, 0, 7)));
7498                         } @$parents ) .
7499                         ')';
7500         }
7501         if (gitweb_check_feature('patches') && @$parents <= 1) {
7502                 $formats_nav .= " | " .
7503                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7504                                 "patch");
7505         }
7506
7507         if (!defined $parent) {
7508                 $parent = "--root";
7509         }
7510         my @difftree;
7511         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7512                 @diff_opts,
7513                 (@$parents <= 1 ? $parent : '-c'),
7514                 $hash, "--"
7515                 or die_error(500, "Open git-diff-tree failed");
7516         @difftree = map { chomp; $_ } <$fd>;
7517         close $fd or die_error(404, "Reading git-diff-tree failed");
7518
7519         # non-textual hash id's can be cached
7520         my $expires;
7521         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7522                 $expires = "+1d";
7523         }
7524         my $refs = git_get_references();
7525         my $ref = format_ref_marker($refs, $co{'id'});
7526
7527         git_header_html(undef, $expires);
7528         git_print_page_nav('commit', '',
7529                            $hash, $co{'tree'}, $hash,
7530                            $formats_nav);
7531
7532         if (defined $co{'parent'}) {
7533                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7534         } else {
7535                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7536         }
7537         print "<div class=\"title_text\">\n" .
7538               "<table class=\"object_header\">\n";
7539         git_print_authorship_rows(\%co);
7540         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7541         print "<tr>" .
7542               "<td>tree</td>" .
7543               "<td class=\"sha1\">" .
7544               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7545                        class => "list"}, $co{'tree'}) .
7546               "</td>" .
7547               "<td class=\"link\">" .
7548               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7549                       "tree");
7550         my $snapshot_links = format_snapshot_links($hash);
7551         if (defined $snapshot_links) {
7552                 print " | " . $snapshot_links;
7553         }
7554         print "</td>" .
7555               "</tr>\n";
7556
7557         foreach my $par (@$parents) {
7558                 print "<tr>" .
7559                       "<td>parent</td>" .
7560                       "<td class=\"sha1\">" .
7561                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7562                                class => "list"}, $par) .
7563                       "</td>" .
7564                       "<td class=\"link\">" .
7565                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7566                       " | " .
7567                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7568                       "</td>" .
7569                       "</tr>\n";
7570         }
7571         print "</table>".
7572               "</div>\n";
7573
7574         print "<div class=\"page_body\">\n";
7575         git_print_log($co{'comment'});
7576         print "</div>\n";
7577
7578         git_difftree_body(\@difftree, $hash, @$parents);
7579
7580         git_footer_html();
7581 }
7582
7583 sub git_object {
7584         # object is defined by:
7585         # - hash or hash_base alone
7586         # - hash_base and file_name
7587         my $type;
7588
7589         # - hash or hash_base alone
7590         if ($hash || ($hash_base && !defined $file_name)) {
7591                 my $object_id = $hash || $hash_base;
7592
7593                 open my $fd, "-|", quote_command(
7594                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7595                         or die_error(404, "Object does not exist");
7596                 $type = <$fd>;
7597                 defined $type && chomp $type;
7598                 close $fd
7599                         or die_error(404, "Object does not exist");
7600
7601         # - hash_base and file_name
7602         } elsif ($hash_base && defined $file_name) {
7603                 $file_name =~ s,/+$,,;
7604
7605                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7606                         or die_error(404, "Base object does not exist");
7607
7608                 # here errors should not happen
7609                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7610                         or die_error(500, "Open git-ls-tree failed");
7611                 my $line = <$fd>;
7612                 close $fd;
7613
7614                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7615                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7616                         die_error(404, "File or directory for given base does not exist");
7617                 }
7618                 $type = $2;
7619                 $hash = $3;
7620         } else {
7621                 die_error(400, "Not enough information to find object");
7622         }
7623
7624         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7625                                           hash=>$hash, hash_base=>$hash_base,
7626                                           file_name=>$file_name),
7627                              -status => '302 Found');
7628 }
7629
7630 sub git_blobdiff {
7631         my $format = shift || 'html';
7632         my $diff_style = $input_params{'diff_style'} || 'inline';
7633
7634         my $fd;
7635         my @difftree;
7636         my %diffinfo;
7637         my $expires;
7638
7639         # preparing $fd and %diffinfo for git_patchset_body
7640         # new style URI
7641         if (defined $hash_base && defined $hash_parent_base) {
7642                 if (defined $file_name) {
7643                         # read raw output
7644                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7645                                 $hash_parent_base, $hash_base,
7646                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7647                                 or die_error(500, "Open git-diff-tree failed");
7648                         @difftree = map { chomp; $_ } <$fd>;
7649                         close $fd
7650                                 or die_error(404, "Reading git-diff-tree failed");
7651                         @difftree
7652                                 or die_error(404, "Blob diff not found");
7653
7654                 } elsif (defined $hash &&
7655                          $hash =~ /[0-9a-fA-F]{40}/) {
7656                         # try to find filename from $hash
7657
7658                         # read filtered raw output
7659                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7660                                 $hash_parent_base, $hash_base, "--"
7661                                 or die_error(500, "Open git-diff-tree failed");
7662                         @difftree =
7663                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7664                                 # $hash == to_id
7665                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7666                                 map { chomp; $_ } <$fd>;
7667                         close $fd
7668                                 or die_error(404, "Reading git-diff-tree failed");
7669                         @difftree
7670                                 or die_error(404, "Blob diff not found");
7671
7672                 } else {
7673                         die_error(400, "Missing one of the blob diff parameters");
7674                 }
7675
7676                 if (@difftree > 1) {
7677                         die_error(400, "Ambiguous blob diff specification");
7678                 }
7679
7680                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7681                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7682                 $file_name   ||= $diffinfo{'to_file'};
7683
7684                 $hash_parent ||= $diffinfo{'from_id'};
7685                 $hash        ||= $diffinfo{'to_id'};
7686
7687                 # non-textual hash id's can be cached
7688                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7689                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7690                         $expires = '+1d';
7691                 }
7692
7693                 # open patch output
7694                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7695                         '-p', ($format eq 'html' ? "--full-index" : ()),
7696                         $hash_parent_base, $hash_base,
7697                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7698                         or die_error(500, "Open git-diff-tree failed");
7699         }
7700
7701         # old/legacy style URI -- not generated anymore since 1.4.3.
7702         if (!%diffinfo) {
7703                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7704         }
7705
7706         # header
7707         if ($format eq 'html') {
7708                 my $formats_nav =
7709                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7710                                 "raw");
7711                 $formats_nav .= diff_style_nav($diff_style);
7712                 git_header_html(undef, $expires);
7713                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7714                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7715                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7716                 } else {
7717                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7718                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7719                 }
7720                 if (defined $file_name) {
7721                         git_print_page_path($file_name, "blob", $hash_base);
7722                 } else {
7723                         print "<div class=\"page_path\"></div>\n";
7724                 }
7725
7726         } elsif ($format eq 'plain') {
7727                 print $cgi->header(
7728                         -type => 'text/plain',
7729                         -charset => 'utf-8',
7730                         -expires => $expires,
7731                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7732
7733                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7734
7735         } else {
7736                 die_error(400, "Unknown blobdiff format");
7737         }
7738
7739         # patch
7740         if ($format eq 'html') {
7741                 print "<div class=\"page_body\">\n";
7742
7743                 git_patchset_body($fd, $diff_style,
7744                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7745                 close $fd;
7746
7747                 print "</div>\n"; # class="page_body"
7748                 git_footer_html();
7749
7750         } else {
7751                 while (my $line = <$fd>) {
7752                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7753                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7754
7755                         print $line;
7756
7757                         last if $line =~ m!^\+\+\+!;
7758                 }
7759                 local $/ = undef;
7760                 print <$fd>;
7761                 close $fd;
7762         }
7763 }
7764
7765 sub git_blobdiff_plain {
7766         git_blobdiff('plain');
7767 }
7768
7769 # assumes that it is added as later part of already existing navigation,
7770 # so it returns "| foo | bar" rather than just "foo | bar"
7771 sub diff_style_nav {
7772         my ($diff_style, $is_combined) = @_;
7773         $diff_style ||= 'inline';
7774
7775         return "" if ($is_combined);
7776
7777         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7778         my %styles = @styles;
7779         @styles =
7780                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7781
7782         return join '',
7783                 map { " | ".$_ }
7784                 map {
7785                         $_ eq $diff_style ? $styles{$_} :
7786                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7787                 } @styles;
7788 }
7789
7790 sub git_commitdiff {
7791         my %params = @_;
7792         my $format = $params{-format} || 'html';
7793         my $diff_style = $input_params{'diff_style'} || 'inline';
7794
7795         my ($patch_max) = gitweb_get_feature('patches');
7796         if ($format eq 'patch') {
7797                 die_error(403, "Patch view not allowed") unless $patch_max;
7798         }
7799
7800         $hash ||= $hash_base || "HEAD";
7801         my %co = parse_commit($hash)
7802             or die_error(404, "Unknown commit object");
7803
7804         # choose format for commitdiff for merge
7805         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7806                 $hash_parent = '--cc';
7807         }
7808         # we need to prepare $formats_nav before almost any parameter munging
7809         my $formats_nav;
7810         if ($format eq 'html') {
7811                 $formats_nav =
7812                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7813                                 "raw");
7814                 if ($patch_max && @{$co{'parents'}} <= 1) {
7815                         $formats_nav .= " | " .
7816                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7817                                         "patch");
7818                 }
7819                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7820
7821                 if (defined $hash_parent &&
7822                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7823                         # commitdiff with two commits given
7824                         my $hash_parent_short = $hash_parent;
7825                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7826                                 $hash_parent_short = substr($hash_parent, 0, 7);
7827                         }
7828                         $formats_nav .=
7829                                 ' (from';
7830                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7831                                 if ($co{'parents'}[$i] eq $hash_parent) {
7832                                         $formats_nav .= ' parent ' . ($i+1);
7833                                         last;
7834                                 }
7835                         }
7836                         $formats_nav .= ': ' .
7837                                 $cgi->a({-href => href(-replay=>1,
7838                                                        hash=>$hash_parent, hash_base=>undef)},
7839                                         esc_html($hash_parent_short)) .
7840                                 ')';
7841                 } elsif (!$co{'parent'}) {
7842                         # --root commitdiff
7843                         $formats_nav .= ' (initial)';
7844                 } elsif (scalar @{$co{'parents'}} == 1) {
7845                         # single parent commit
7846                         $formats_nav .=
7847                                 ' (parent: ' .
7848                                 $cgi->a({-href => href(-replay=>1,
7849                                                        hash=>$co{'parent'}, hash_base=>undef)},
7850                                         esc_html(substr($co{'parent'}, 0, 7))) .
7851                                 ')';
7852                 } else {
7853                         # merge commit
7854                         if ($hash_parent eq '--cc') {
7855                                 $formats_nav .= ' | ' .
7856                                         $cgi->a({-href => href(-replay=>1,
7857                                                                hash=>$hash, hash_parent=>'-c')},
7858                                                 'combined');
7859                         } else { # $hash_parent eq '-c'
7860                                 $formats_nav .= ' | ' .
7861                                         $cgi->a({-href => href(-replay=>1,
7862                                                                hash=>$hash, hash_parent=>'--cc')},
7863                                                 'compact');
7864                         }
7865                         $formats_nav .=
7866                                 ' (merge: ' .
7867                                 join(' ', map {
7868                                         $cgi->a({-href => href(-replay=>1,
7869                                                                hash=>$_, hash_base=>undef)},
7870                                                 esc_html(substr($_, 0, 7)));
7871                                 } @{$co{'parents'}} ) .
7872                                 ')';
7873                 }
7874         }
7875
7876         my $hash_parent_param = $hash_parent;
7877         if (!defined $hash_parent_param) {
7878                 # --cc for multiple parents, --root for parentless
7879                 $hash_parent_param =
7880                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7881         }
7882
7883         # read commitdiff
7884         my $fd;
7885         my @difftree;
7886         if ($format eq 'html') {
7887                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7888                         "--no-commit-id", "--patch-with-raw", "--full-index",
7889                         $hash_parent_param, $hash, "--"
7890                         or die_error(500, "Open git-diff-tree failed");
7891
7892                 while (my $line = <$fd>) {
7893                         chomp $line;
7894                         # empty line ends raw part of diff-tree output
7895                         last unless $line;
7896                         push @difftree, scalar parse_difftree_raw_line($line);
7897                 }
7898
7899         } elsif ($format eq 'plain') {
7900                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7901                         '-p', $hash_parent_param, $hash, "--"
7902                         or die_error(500, "Open git-diff-tree failed");
7903         } elsif ($format eq 'patch') {
7904                 # For commit ranges, we limit the output to the number of
7905                 # patches specified in the 'patches' feature.
7906                 # For single commits, we limit the output to a single patch,
7907                 # diverging from the git-format-patch default.
7908                 my @commit_spec = ();
7909                 if ($hash_parent) {
7910                         if ($patch_max > 0) {
7911                                 push @commit_spec, "-$patch_max";
7912                         }
7913                         push @commit_spec, '-n', "$hash_parent..$hash";
7914                 } else {
7915                         if ($params{-single}) {
7916                                 push @commit_spec, '-1';
7917                         } else {
7918                                 if ($patch_max > 0) {
7919                                         push @commit_spec, "-$patch_max";
7920                                 }
7921                                 push @commit_spec, "-n";
7922                         }
7923                         push @commit_spec, '--root', $hash;
7924                 }
7925                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7926                         '--encoding=utf8', '--stdout', @commit_spec
7927                         or die_error(500, "Open git-format-patch failed");
7928         } else {
7929                 die_error(400, "Unknown commitdiff format");
7930         }
7931
7932         # non-textual hash id's can be cached
7933         my $expires;
7934         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7935                 $expires = "+1d";
7936         }
7937
7938         # write commit message
7939         if ($format eq 'html') {
7940                 my $refs = git_get_references();
7941                 my $ref = format_ref_marker($refs, $co{'id'});
7942
7943                 git_header_html(undef, $expires);
7944                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7945                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7946                 print "<div class=\"title_text\">\n" .
7947                       "<table class=\"object_header\">\n";
7948                 git_print_authorship_rows(\%co);
7949                 print "</table>".
7950                       "</div>\n";
7951                 print "<div class=\"page_body\">\n";
7952                 if (@{$co{'comment'}} > 1) {
7953                         print "<div class=\"log\">\n";
7954                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7955                         print "</div>\n"; # class="log"
7956                 }
7957
7958         } elsif ($format eq 'plain') {
7959                 my $refs = git_get_references("tags");
7960                 my $tagname = git_get_rev_name_tags($hash);
7961                 my $filename = basename($project) . "-$hash.patch";
7962
7963                 print $cgi->header(
7964                         -type => 'text/plain',
7965                         -charset => 'utf-8',
7966                         -expires => $expires,
7967                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7968                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7969                 print "From: " . to_utf8($co{'author'}) . "\n";
7970                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7971                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7972
7973                 print "X-Git-Tag: $tagname\n" if $tagname;
7974                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7975
7976                 foreach my $line (@{$co{'comment'}}) {
7977                         print to_utf8($line) . "\n";
7978                 }
7979                 print "---\n\n";
7980         } elsif ($format eq 'patch') {
7981                 my $filename = basename($project) . "-$hash.patch";
7982
7983                 print $cgi->header(
7984                         -type => 'text/plain',
7985                         -charset => 'utf-8',
7986                         -expires => $expires,
7987                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7988         }
7989
7990         # write patch
7991         if ($format eq 'html') {
7992                 my $use_parents = !defined $hash_parent ||
7993                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7994                 git_difftree_body(\@difftree, $hash,
7995                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7996                 print "<br/>\n";
7997
7998                 git_patchset_body($fd, $diff_style,
7999                                   \@difftree, $hash,
8000                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8001                 close $fd;
8002                 print "</div>\n"; # class="page_body"
8003                 git_footer_html();
8004
8005         } elsif ($format eq 'plain') {
8006                 local $/ = undef;
8007                 print <$fd>;
8008                 close $fd
8009                         or print "Reading git-diff-tree failed\n";
8010         } elsif ($format eq 'patch') {
8011                 local $/ = undef;
8012                 print <$fd>;
8013                 close $fd
8014                         or print "Reading git-format-patch failed\n";
8015         }
8016 }
8017
8018 sub git_commitdiff_plain {
8019         git_commitdiff(-format => 'plain');
8020 }
8021
8022 # format-patch-style patches
8023 sub git_patch {
8024         git_commitdiff(-format => 'patch', -single => 1);
8025 }
8026
8027 sub git_patches {
8028         git_commitdiff(-format => 'patch');
8029 }
8030
8031 sub git_history {
8032         git_log_generic('history', \&git_history_body,
8033                         $hash_base, $hash_parent_base,
8034                         $file_name, $hash);
8035 }
8036
8037 sub git_search {
8038         $searchtype ||= 'commit';
8039
8040         # check if appropriate features are enabled
8041         gitweb_check_feature('search')
8042                 or die_error(403, "Search is disabled");
8043         if ($searchtype eq 'pickaxe') {
8044                 # pickaxe may take all resources of your box and run for several minutes
8045                 # with every query - so decide by yourself how public you make this feature
8046                 gitweb_check_feature('pickaxe')
8047                         or die_error(403, "Pickaxe search is disabled");
8048         }
8049         if ($searchtype eq 'grep') {
8050                 # grep search might be potentially CPU-intensive, too
8051                 gitweb_check_feature('grep')
8052                         or die_error(403, "Grep search is disabled");
8053         }
8054
8055         if (!defined $searchtext) {
8056                 die_error(400, "Text field is empty");
8057         }
8058         if (!defined $hash) {
8059                 $hash = git_get_head_hash($project);
8060         }
8061         my %co = parse_commit($hash);
8062         if (!%co) {
8063                 die_error(404, "Unknown commit object");
8064         }
8065         if (!defined $page) {
8066                 $page = 0;
8067         }
8068
8069         if ($searchtype eq 'commit' ||
8070             $searchtype eq 'author' ||
8071             $searchtype eq 'committer') {
8072                 git_search_message(%co);
8073         } elsif ($searchtype eq 'pickaxe') {
8074                 git_search_changes(%co);
8075         } elsif ($searchtype eq 'grep') {
8076                 git_search_files(%co);
8077         } else {
8078                 die_error(400, "Unknown search type");
8079         }
8080 }
8081
8082 sub git_search_help {
8083         git_header_html();
8084         git_print_page_nav('','', $hash,$hash,$hash);
8085         print <<EOT;
8086 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8087 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8088 the pattern entered is recognized as the POSIX extended
8089 <a href="https://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8090 insensitive).</p>
8091 <dl>
8092 <dt><b>commit</b></dt>
8093 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8094 EOT
8095         my $have_grep = gitweb_check_feature('grep');
8096         if ($have_grep) {
8097                 print <<EOT;
8098 <dt><b>grep</b></dt>
8099 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8100     a different one) are searched for the given pattern. On large trees, this search can take
8101 a while and put some strain on the server, so please use it with some consideration. Note that
8102 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8103 case-sensitive.</dd>
8104 EOT
8105         }
8106         print <<EOT;
8107 <dt><b>author</b></dt>
8108 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8109 <dt><b>committer</b></dt>
8110 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8111 EOT
8112         my $have_pickaxe = gitweb_check_feature('pickaxe');
8113         if ($have_pickaxe) {
8114                 print <<EOT;
8115 <dt><b>pickaxe</b></dt>
8116 <dd>All commits that caused the string to appear or disappear from any file (changes that
8117 added, removed or "modified" the string) will be listed. This search can take a while and
8118 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8119 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8120 EOT
8121         }
8122         print "</dl>\n";
8123         git_footer_html();
8124 }
8125
8126 sub git_shortlog {
8127         git_log_generic('shortlog', \&git_shortlog_body,
8128                         $hash, $hash_parent);
8129 }
8130
8131 ## ......................................................................
8132 ## feeds (RSS, Atom; OPML)
8133
8134 sub git_feed {
8135         my $format = shift || 'atom';
8136         my $have_blame = gitweb_check_feature('blame');
8137
8138         # Atom: http://www.atomenabled.org/developers/syndication/
8139         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8140         if ($format ne 'rss' && $format ne 'atom') {
8141                 die_error(400, "Unknown web feed format");
8142         }
8143
8144         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8145         my $head = $hash || 'HEAD';
8146         my @commitlist = parse_commits($head, 150, 0, $file_name);
8147
8148         my %latest_commit;
8149         my %latest_date;
8150         my $content_type = "application/$format+xml";
8151         if (defined $cgi->http('HTTP_ACCEPT') &&
8152                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8153                 # browser (feed reader) prefers text/xml
8154                 $content_type = 'text/xml';
8155         }
8156         if (defined($commitlist[0])) {
8157                 %latest_commit = %{$commitlist[0]};
8158                 my $latest_epoch = $latest_commit{'committer_epoch'};
8159                 exit_if_unmodified_since($latest_epoch);
8160                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8161         }
8162         print $cgi->header(
8163                 -type => $content_type,
8164                 -charset => 'utf-8',
8165                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8166                 -status => '200 OK');
8167
8168         # Optimization: skip generating the body if client asks only
8169         # for Last-Modified date.
8170         return if ($cgi->request_method() eq 'HEAD');
8171
8172         # header variables
8173         my $title = "$site_name - $project/$action";
8174         my $feed_type = 'log';
8175         if (defined $hash) {
8176                 $title .= " - '$hash'";
8177                 $feed_type = 'branch log';
8178                 if (defined $file_name) {
8179                         $title .= " :: $file_name";
8180                         $feed_type = 'history';
8181                 }
8182         } elsif (defined $file_name) {
8183                 $title .= " - $file_name";
8184                 $feed_type = 'history';
8185         }
8186         $title .= " $feed_type";
8187         $title = esc_html($title);
8188         my $descr = git_get_project_description($project);
8189         if (defined $descr) {
8190                 $descr = esc_html($descr);
8191         } else {
8192                 $descr = "$project " .
8193                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8194                          " feed";
8195         }
8196         my $owner = git_get_project_owner($project);
8197         $owner = esc_html($owner);
8198
8199         #header
8200         my $alt_url;
8201         if (defined $file_name) {
8202                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8203         } elsif (defined $hash) {
8204                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8205         } else {
8206                 $alt_url = href(-full=>1, action=>"summary");
8207         }
8208         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8209         if ($format eq 'rss') {
8210                 print <<XML;
8211 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8212 <channel>
8213 XML
8214                 print "<title>$title</title>\n" .
8215                       "<link>$alt_url</link>\n" .
8216                       "<description>$descr</description>\n" .
8217                       "<language>en</language>\n" .
8218                       # project owner is responsible for 'editorial' content
8219                       "<managingEditor>$owner</managingEditor>\n";
8220                 if (defined $logo || defined $favicon) {
8221                         # prefer the logo to the favicon, since RSS
8222                         # doesn't allow both
8223                         my $img = esc_url($logo || $favicon);
8224                         print "<image>\n" .
8225                               "<url>$img</url>\n" .
8226                               "<title>$title</title>\n" .
8227                               "<link>$alt_url</link>\n" .
8228                               "</image>\n";
8229                 }
8230                 if (%latest_date) {
8231                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8232                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8233                 }
8234                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8235         } elsif ($format eq 'atom') {
8236                 print <<XML;
8237 <feed xmlns="http://www.w3.org/2005/Atom">
8238 XML
8239                 print "<title>$title</title>\n" .
8240                       "<subtitle>$descr</subtitle>\n" .
8241                       '<link rel="alternate" type="text/html" href="' .
8242                       $alt_url . '" />' . "\n" .
8243                       '<link rel="self" type="' . $content_type . '" href="' .
8244                       $cgi->self_url() . '" />' . "\n" .
8245                       "<id>" . href(-full=>1) . "</id>\n" .
8246                       # use project owner for feed author
8247                       "<author><name>$owner</name></author>\n";
8248                 if (defined $favicon) {
8249                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8250                 }
8251                 if (defined $logo) {
8252                         # not twice as wide as tall: 72 x 27 pixels
8253                         print "<logo>" . esc_url($logo) . "</logo>\n";
8254                 }
8255                 if (! %latest_date) {
8256                         # dummy date to keep the feed valid until commits trickle in:
8257                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8258                 } else {
8259                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8260                 }
8261                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8262         }
8263
8264         # contents
8265         for (my $i = 0; $i <= $#commitlist; $i++) {
8266                 my %co = %{$commitlist[$i]};
8267                 my $commit = $co{'id'};
8268                 # we read 150, we always show 30 and the ones more recent than 48 hours
8269                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8270                         last;
8271                 }
8272                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8273
8274                 # get list of changed files
8275                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8276                         $co{'parent'} || "--root",
8277                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8278                         or next;
8279                 my @difftree = map { chomp; $_ } <$fd>;
8280                 close $fd
8281                         or next;
8282
8283                 # print element (entry, item)
8284                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8285                 if ($format eq 'rss') {
8286                         print "<item>\n" .
8287                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8288                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8289                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8290                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8291                               "<link>$co_url</link>\n" .
8292                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8293                               "<content:encoded>" .
8294                               "<![CDATA[\n";
8295                 } elsif ($format eq 'atom') {
8296                         print "<entry>\n" .
8297                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8298                               "<updated>$cd{'iso-8601'}</updated>\n" .
8299                               "<author>\n" .
8300                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8301                         if ($co{'author_email'}) {
8302                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8303                         }
8304                         print "</author>\n" .
8305                               # use committer for contributor
8306                               "<contributor>\n" .
8307                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8308                         if ($co{'committer_email'}) {
8309                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8310                         }
8311                         print "</contributor>\n" .
8312                               "<published>$cd{'iso-8601'}</published>\n" .
8313                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8314                               "<id>$co_url</id>\n" .
8315                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8316                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8317                 }
8318                 my $comment = $co{'comment'};
8319                 print "<pre>\n";
8320                 foreach my $line (@$comment) {
8321                         $line = esc_html($line);
8322                         print "$line\n";
8323                 }
8324                 print "</pre><ul>\n";
8325                 foreach my $difftree_line (@difftree) {
8326                         my %difftree = parse_difftree_raw_line($difftree_line);
8327                         next if !$difftree{'from_id'};
8328
8329                         my $file = $difftree{'file'} || $difftree{'to_file'};
8330
8331                         print "<li>" .
8332                               "[" .
8333                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8334                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8335                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8336                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8337                                       -title => "diff"}, 'D');
8338                         if ($have_blame) {
8339                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8340                                                              file_name=>$file, hash_base=>$commit),
8341                                               -title => "blame"}, 'B');
8342                         }
8343                         # if this is not a feed of a file history
8344                         if (!defined $file_name || $file_name ne $file) {
8345                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8346                                                              file_name=>$file, hash=>$commit),
8347                                               -title => "history"}, 'H');
8348                         }
8349                         $file = esc_path($file);
8350                         print "] ".
8351                               "$file</li>\n";
8352                 }
8353                 if ($format eq 'rss') {
8354                         print "</ul>]]>\n" .
8355                               "</content:encoded>\n" .
8356                               "</item>\n";
8357                 } elsif ($format eq 'atom') {
8358                         print "</ul>\n</div>\n" .
8359                               "</content>\n" .
8360                               "</entry>\n";
8361                 }
8362         }
8363
8364         # end of feed
8365         if ($format eq 'rss') {
8366                 print "</channel>\n</rss>\n";
8367         } elsif ($format eq 'atom') {
8368                 print "</feed>\n";
8369         }
8370 }
8371
8372 sub git_rss {
8373         git_feed('rss');
8374 }
8375
8376 sub git_atom {
8377         git_feed('atom');
8378 }
8379
8380 sub git_opml {
8381         my @list = git_get_projects_list($project_filter, $strict_export);
8382         if (!@list) {
8383                 die_error(404, "No projects found");
8384         }
8385
8386         print $cgi->header(
8387                 -type => 'text/xml',
8388                 -charset => 'utf-8',
8389                 -content_disposition => 'inline; filename="opml.xml"');
8390
8391         my $title = esc_html($site_name);
8392         my $filter = " within subdirectory ";
8393         if (defined $project_filter) {
8394                 $filter .= esc_html($project_filter);
8395         } else {
8396                 $filter = "";
8397         }
8398         print <<XML;
8399 <?xml version="1.0" encoding="utf-8"?>
8400 <opml version="1.0">
8401 <head>
8402   <title>$title OPML Export$filter</title>
8403 </head>
8404 <body>
8405 <outline text="git RSS feeds">
8406 XML
8407
8408         foreach my $pr (@list) {
8409                 my %proj = %$pr;
8410                 my $head = git_get_head_hash($proj{'path'});
8411                 if (!defined $head) {
8412                         next;
8413                 }
8414                 $git_dir = "$projectroot/$proj{'path'}";
8415                 my %co = parse_commit($head);
8416                 if (!%co) {
8417                         next;
8418                 }
8419
8420                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8421                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8422                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8423                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8424         }
8425         print <<XML;
8426 </outline>
8427 </body>
8428 </opml>
8429 XML
8430 }