lib/gitweb.pm

   1 co#!/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 package gitweb;
  10
  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);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use FindBin;
  21 binmode STDOUT, ':utf8';
  22
  23 BEGIN {
  24         CGI->compile() if $ENV{'MOD_PERL'};
  25 }
  26
  27 use vars qw(
  28         $cgi $version $my_url $my_uri $base_url $path_info $GIT $projectroot
  29         $project_maxdepth $home_link $home_link_str $site_name $site_header
  30         $home_text $site_footer @stylesheets $stylesheet $logo $favicon
  31         $logo_url $logo_label $logo_url $logo_label $projects_list
  32         $projects_list_description_width $default_projects_order
  33         $export_ok $export_auth_hook $strict_export @git_base_url_list
  34         $default_blob_plain_mimetype $default_text_plain_charset
  35         $mimetypes_file $fallback_encoding @diff_opts $prevent_xss
  36         %known_snapshot_formats %known_snapshot_format_aliases %feature
  37         $GITWEB_CONFIG $GITWEB_CONFIG $GITWEB_CONFIG_SYSTEM $git_version
  38         %input_params @cgi_param_mapping %cgi_param_mapping %actions
  39         %allowed_options $action $project $file_name $file_parent $hash
  40         $hash_parent $hash_base @extra_options $hash_parent_base $page
  41         $searchtype $search_use_regexp $searchtext $search_regexp $git_dir
  42         @snapshot_fmts
  43
  44         $c
  45 );
  46
  47 sub main {
  48         our $c   = shift;
  49
  50         our $cgi = new CGI;
  51         our $version = "1.6.3.3";
  52         our $my_url = $cgi->url();
  53         our $my_uri = $cgi->url(-absolute => 1);
  54
  55         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  56         # needed and used only for URLs with nonempty PATH_INFO
  57         our $base_url = $my_url;
  58
  59         # When the script is used as DirectoryIndex, the URL does not contain the name
  60         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  61         # have to do it ourselves. We make $path_info global because it's also used
  62         # later on.
  63         #
  64         # Another issue with the script being the DirectoryIndex is that the resulting
  65         # $my_url data is not the full script URL: this is good, because we want
  66         # generated links to keep implying the script name if it wasn't explicitly
  67         # indicated in the URL we're handling, but it means that $my_url cannot be used
  68         # as base URL.
  69         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  70         # to build the base URL ourselves:
  71         our $path_info = $ENV{"PATH_INFO"};
  72         if ($path_info) {
  73                 if ($my_url =~ s,\Q$path_info\E$,, &&
  74                     $my_uri =~ s,\Q$path_info\E$,, &&
  75                     defined $ENV{'SCRIPT_NAME'}) {
  76                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  77                 }
  78         }
  79
  80         # core git executable to use
  81         # this can just be "git" if your webserver has a sensible PATH
  82         our $GIT = "/usr/bin/git";
  83
  84         # absolute fs-path which will be prepended to the project path
  85         our $projectroot = "/pub/scm";
  86
  87         # fs traversing limit for getting project list
  88         # the number is relative to the projectroot
  89         our $project_maxdepth = 2007;
  90
  91         # target of the home link on top of all pages
  92         our $home_link = $my_uri || "/";
  93
  94         # string of the home link on top of all pages
  95         our $home_link_str = "Project Gitalist";
  96
  97         # name of your site or organization to appear in page titles
  98         # replace this with something more descriptive for clearer bookmarks
  99         our $site_name = ""
 100                          || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
 101
 102         # filename of html text to include at top of each page
 103         our $site_header = "";
 104         # html text to include at home page
 105         our $home_text = "indextext.html";
 106         # filename of html text to include at bottom of each page
 107         our $site_footer = "";
 108
 109         # URI of stylesheets
 110         our @stylesheets = ("gitweb.css");
 111         # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 112         our $stylesheet = undef;
 113         # URI of GIT logo (72x27 size)
 114         our $logo = "git-logo.png";
 115         # URI of GIT favicon, assumed to be image/png type
 116         our $favicon = "git-favicon.png";
 117
 118         # URI and label (title) of GIT logo link
 119         our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 120         our $logo_label = "git documentation";
 121
 122         # source of projects list
 123         our $projects_list = "";
 124
 125         # the width (in characters) of the projects list "Description" column
 126         our $projects_list_description_width = 25;
 127
 128         # default order of projects list
 129         # valid values are none, project, descr, owner, and age
 130         our $default_projects_order = "project";
 131
 132         # show repository only if this file exists
 133         # (only effective if this variable evaluates to true)
 134         our $export_ok = "";
 135
 136         # show repository only if this subroutine returns true
 137         # when given the path to the project, for example:
 138         #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139         our $export_auth_hook = undef;
 140
 141         # only allow viewing of repositories also shown on the overview page
 142         our $strict_export = "";
 143
 144         # list of git base URLs used for URL to where fetch project from,
 145         # i.e. full URL is "$git_base_url/$project"
 146         our @git_base_url_list = grep { $_ ne '' } ("");
 147
 148         # default blob_plain mimetype and default charset for text/plain blob
 149         our $default_blob_plain_mimetype = 'text/plain';
 150         our $default_text_plain_charset  = undef;
 151
 152         # file to use for guessing MIME types before trying /etc/mime.types
 153         # (relative to the current git repository)
 154         our $mimetypes_file = undef;
 155
 156         # assume this charset if line contains non-UTF-8 characters;
 157         # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158         # for which encoding all byte sequences are valid, for example
 159         # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160         # could be even 'utf-8' for the old behavior)
 161         our $fallback_encoding = 'latin1';
 162
 163         # rename detection options for git-diff and git-diff-tree
 164         # - default is '-M', with the cost proportional to
 165         #   (number of removed files) * (number of new files).
 166         # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167         #   (number of changed files + number of removed files) * (number of new files)
 168         # - even more costly is '-C', '--find-copies-harder' with cost
 169         #   (number of files in the original tree) * (number of new files)
 170         # - one might want to include '-B' option, e.g. '-B', '-M'
 171         our @diff_opts = ('-M'); # taken from git_commit
 172
 173         # Disables features that would allow repository owners to inject script into
 174         # the gitweb domain.
 175         our $prevent_xss = 0;
 176
 177         # information about snapshot formats that gitweb is capable of serving
 178         our %known_snapshot_formats = (
 179                 # name => {
 180                 #       'display' => display name,
 181                 #       'type' => mime type,
 182                 #       'suffix' => filename suffix,
 183                 #       'format' => --format for git-archive,
 184                 #       'compressor' => [compressor command and arguments]
 185                 #                       (array reference, optional)}
 186                 #
 187                 'tgz' => {
 188                         'display' => 'tar.gz',
 189                         'type' => 'application/x-gzip',
 190                         'suffix' => '.tar.gz',
 191                         'format' => 'tar',
 192                         'compressor' => ['gzip']},
 193
 194                 'tbz2' => {
 195                         'display' => 'tar.bz2',
 196                         'type' => 'application/x-bzip2',
 197                         'suffix' => '.tar.bz2',
 198                         'format' => 'tar',
 199                         'compressor' => ['bzip2']},
 200
 201                 'zip' => {
 202                         'display' => 'zip',
 203                         'type' => 'application/x-zip',
 204                         'suffix' => '.zip',
 205                         'format' => 'zip'},
 206         );
 207
 208         # Aliases so we understand old gitweb.snapshot values in repository
 209         # configuration.
 210         our %known_snapshot_format_aliases = (
 211                 'gzip'  => 'tgz',
 212                 'bzip2' => 'tbz2',
 213
 214                 # backward compatibility: legacy gitweb config support
 215                 'x-gzip' => undef, 'gz' => undef,
 216                 'x-bzip2' => undef, 'bz2' => undef,
 217                 'x-zip' => undef, '' => undef,
 218         );
 219
 220         my $feature_bool = sub {
 221                 my $key = shift;
 222                 my ($val) = git_get_project_config($key, '--bool');
 223
 224                 if (!defined $val) {
 225                         return ($_[0]);
 226                 } elsif ($val eq 'true') {
 227                         return (1);
 228                 } elsif ($val eq 'false') {
 229                         return (0);
 230                 }
 231         };
 232
 233         my $feature_snapshot = sub {
 234                 my (@fmts) = @_;
 235
 236                 my ($val) = git_get_project_config('snapshot');
 237
 238                 if ($val) {
 239                         @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 240                 }
 241
 242                 return @fmts;
 243         };
 244
 245         my $feature_patches = sub {
 246                 my @val = (git_get_project_config('patches', '--int'));
 247
 248                 if (@val) {
 249                         return @val;
 250                 }
 251
 252                 return ($_[0]);
 253         };
 254
 255
 256         # You define site-wide feature defaults here; override them with
 257         # $GITWEB_CONFIG as necessary.
 258         our %feature = (
 259                 # feature => {
 260                 #       'sub' => feature-sub (subroutine),
 261                 #       'override' => allow-override (boolean),
 262                 #       'default' => [ default options...] (array reference)}
 263                 #
 264                 # if feature is overridable (it means that allow-override has true value),
 265                 # then feature-sub will be called with default options as parameters;
 266                 # return value of feature-sub indicates if to enable specified feature
 267                 #
 268                 # if there is no 'sub' key (no feature-sub), then feature cannot be
 269                 # overriden
 270                 #
 271                 # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 272                 # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 273                 # is enabled
 274
 275                 # Enable the 'blame' blob view, showing the last commit that modified
 276                 # each line in the file. This can be very CPU-intensive.
 277
 278                 # To enable system wide have in $GITWEB_CONFIG
 279                 # $feature{'blame'}{'default'} = [1];
 280                 # To have project specific config enable override in $GITWEB_CONFIG
 281                 # $feature{'blame'}{'override'} = 1;
 282                 # and in project config gitweb.blame = 0|1;
 283                 'blame' => {
 284                         'sub' => sub { &$feature_bool('blame', @_) },
 285                         'override' => 0,
 286                         'default' => [0]},
 287
 288                 # Enable the 'snapshot' link, providing a compressed archive of any
 289                 # tree. This can potentially generate high traffic if you have large
 290                 # project.
 291
 292                 # Value is a list of formats defined in %known_snapshot_formats that
 293                 # you wish to offer.
 294                 # To disable system wide have in $GITWEB_CONFIG
 295                 # $feature{'snapshot'}{'default'} = [];
 296                 # To have project specific config enable override in $GITWEB_CONFIG
 297                 # $feature{'snapshot'}{'override'} = 1;
 298                 # and in project config, a comma-separated list of formats or "none"
 299                 # to disable.  Example: gitweb.snapshot = tbz2,zip;
 300                 'snapshot' => {
 301                         'sub' => $feature_snapshot,
 302                         'override' => 0,
 303                         'default' => ['tgz']},
 304
 305                 # Enable text search, which will list the commits which match author,
 306                 # committer or commit text to a given string.  Enabled by default.
 307                 # Project specific override is not supported.
 308                 'search' => {
 309                         'override' => 0,
 310                         'default' => [1]},
 311
 312                 # Enable grep search, which will list the files in currently selected
 313                 # tree containing the given string. Enabled by default. This can be
 314                 # potentially CPU-intensive, of course.
 315
 316                 # To enable system wide have in $GITWEB_CONFIG
 317                 # $feature{'grep'}{'default'} = [1];
 318                 # To have project specific config enable override in $GITWEB_CONFIG
 319                 # $feature{'grep'}{'override'} = 1;
 320                 # and in project config gitweb.grep = 0|1;
 321                 'grep' => {
 322                         'sub' => sub { &$feature_bool('grep', @_) },
 323                         'override' => 0,
 324                         'default' => [1]},
 325
 326                 # Enable the pickaxe search, which will list the commits that modified
 327                 # a given string in a file. This can be practical and quite faster
 328                 # alternative to 'blame', but still potentially CPU-intensive.
 329
 330                 # To enable system wide have in $GITWEB_CONFIG
 331                 # $feature{'pickaxe'}{'default'} = [1];
 332                 # To have project specific config enable override in $GITWEB_CONFIG
 333                 # $feature{'pickaxe'}{'override'} = 1;
 334                 # and in project config gitweb.pickaxe = 0|1;
 335                 'pickaxe' => {
 336                         'sub' => sub { &$feature_bool('pickaxe', @_) },
 337                         'override' => 0,
 338                         'default' => [1]},
 339
 340                 # Make gitweb use an alternative format of the URLs which can be
 341                 # more readable and natural-looking: project name is embedded
 342                 # directly in the path and the query string contains other
 343                 # auxiliary information. All gitweb installations recognize
 344                 # URL in either format; this configures in which formats gitweb
 345                 # generates links.
 346
 347                 # To enable system wide have in $GITWEB_CONFIG
 348                 # $feature{'pathinfo'}{'default'} = [1];
 349                 # Project specific override is not supported.
 350
 351                 # Note that you will need to change the default location of CSS,
 352                 # favicon, logo and possibly other files to an absolute URL. Also,
 353                 # if gitweb.cgi serves as your indexfile, you will need to force
 354                 # $my_uri to contain the script name in your $GITWEB_CONFIG.
 355                 'pathinfo' => {
 356                         'override' => 0,
 357                         'default' => [0]},
 358
 359                 # Make gitweb consider projects in project root subdirectories
 360                 # to be forks of existing projects. Given project $projname.git,
 361                 # projects matching $projname/*.git will not be shown in the main
 362                 # projects list, instead a '+' mark will be added to $projname
 363                 # there and a 'forks' view will be enabled for the project, listing
 364                 # all the forks. If project list is taken from a file, forks have
 365                 # to be listed after the main project.
 366
 367                 # To enable system wide have in $GITWEB_CONFIG
 368                 # $feature{'forks'}{'default'} = [1];
 369                 # Project specific override is not supported.
 370                 'forks' => {
 371                         'override' => 0,
 372                         'default' => [0]},
 373
 374                 # Insert custom links to the action bar of all project pages.
 375                 # This enables you mainly to link to third-party scripts integrating
 376                 # into gitweb; e.g. git-browser for graphical history representation
 377                 # or custom web-based repository administration interface.
 378
 379                 # The 'default' value consists of a list of triplets in the form
 380                 # (label, link, position) where position is the label after which
 381                 # to insert the link and link is a format string where %n expands
 382                 # to the project name, %f to the project path within the filesystem,
 383                 # %h to the current hash (h gitweb parameter) and %b to the current
 384                 # hash base (hb gitweb parameter); %% expands to %.
 385
 386                 # To enable system wide have in $GITWEB_CONFIG e.g.
 387                 # $feature{'actions'}{'default'} = [('graphiclog',
 388                 #       '/git-browser/by-commit.html?r=%n', 'summary')];
 389                 # Project specific override is not supported.
 390                 'actions' => {
 391                         'override' => 0,
 392                         'default' => []},
 393
 394                 # Allow gitweb scan project content tags described in ctags/
 395                 # of project repository, and display the popular Web 2.0-ish
 396                 # "tag cloud" near the project list. Note that this is something
 397                 # COMPLETELY different from the normal Git tags.
 398
 399                 # gitweb by itself can show existing tags, but it does not handle
 400                 # tagging itself; you need an external application for that.
 401                 # For an example script, check Girocco's cgi/tagproj.cgi.
 402                 # You may want to install the HTML::TagCloud Perl module to get
 403                 # a pretty tag cloud instead of just a list of tags.
 404
 405                 # To enable system wide have in $GITWEB_CONFIG
 406                 # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 407                 # Project specific override is not supported.
 408                 'ctags' => {
 409                         'override' => 0,
 410                         'default' => [0]},
 411
 412                 # The maximum number of patches in a patchset generated in patch
 413                 # view. Set this to 0 or undef to disable patch view, or to a
 414                 # negative number to remove any limit.
 415
 416                 # To disable system wide have in $GITWEB_CONFIG
 417                 # $feature{'patches'}{'default'} = [0];
 418                 # To have project specific config enable override in $GITWEB_CONFIG
 419                 # $feature{'patches'}{'override'} = 1;
 420                 # and in project config gitweb.patches = 0|n;
 421                 # where n is the maximum number of patches allowed in a patchset.
 422                 'patches' => {
 423                         'sub' => $feature_patches,
 424                         'override' => 0,
 425                         'default' => [16]},
 426         );
 427
 428         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "gitweb_config.perl";
 429         if (-e $GITWEB_CONFIG) {
 430                 do $GITWEB_CONFIG;
 431         } else {
 432                 our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "$FindBin::Bin/../gitweb.conf";
 433                 do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 434         }
 435
 436         # version of the core git binary
 437         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 438
 439         $projects_list ||= $projectroot;
 440
 441         # ======================================================================
 442         # input validation and dispatch
 443
 444         # input parameters can be collected from a variety of sources (presently, CGI
 445         # and PATH_INFO), so we define an %input_params hash that collects them all
 446         # together during validation: this allows subsequent uses (e.g. href()) to be
 447         # agnostic of the parameter origin
 448
 449         our %input_params = ();
 450
 451         # input parameters are stored with the long parameter name as key. This will
 452         # also be used in the href subroutine to convert parameters to their CGI
 453         # equivalent, and since the href() usage is the most frequent one, we store
 454         # the name -> CGI key mapping here, instead of the reverse.
 455         #
 456         # XXX: Warning: If you touch this, check the search form for updating,
 457         # too.
 458
 459         our @cgi_param_mapping = (
 460                 project => "p",
 461                 action => "a",
 462                 file_name => "f",
 463                 file_parent => "fp",
 464                 hash => "h",
 465                 hash_parent => "hp",
 466                 hash_base => "hb",
 467                 hash_parent_base => "hpb",
 468                 page => "pg",
 469                 order => "o",
 470                 searchtext => "s",
 471                 searchtype => "st",
 472                 snapshot_format => "sf",
 473                 extra_options => "opt",
 474                 search_use_regexp => "sr",
 475         );
 476         our %cgi_param_mapping = @cgi_param_mapping;
 477
 478         # we will also need to know the possible actions, for validation
 479         our %actions = (
 480                 "blame" => \&git_blame,
 481                 "blobdiff" => \&git_blobdiff,
 482                 "blobdiff_plain" => \&git_blobdiff_plain,
 483                 "blob" => \&git_blob,
 484                 "blob_plain" => \&git_blob_plain,
 485                 "commitdiff" => \&git_commitdiff,
 486                 "commitdiff_plain" => \&git_commitdiff_plain,
 487                 "commit" => \&git_commit,
 488                 "forks" => \&git_forks,
 489                 "heads" => \&git_heads,
 490                 "history" => \&git_history,
 491                 "log" => \&git_log,
 492                 "patch" => \&git_patch,
 493                 "patches" => \&git_patches,
 494                 "rss" => \&git_rss,
 495                 "atom" => \&git_atom,
 496                 "search" => \&git_search,
 497                 "search_help" => \&git_search_help,
 498                 "shortlog" => \&git_shortlog,
 499                 "summary" => \&git_summary,
 500                 "tag" => \&git_tag,
 501                 "tags" => \&git_tags,
 502                 "tree" => \&git_tree,
 503                 "snapshot" => \&git_snapshot,
 504                 "object" => \&git_object,
 505                 # those below don't need $project
 506                 "opml" => \&git_opml,
 507                 "project_list" => \&git_project_list,
 508                 "project_index" => \&git_project_index,
 509         );
 510
 511         # finally, we have the hash of allowed extra_options for the commands that
 512         # allow them
 513         our %allowed_options = (
 514                 "--no-merges" => [ qw(rss atom log shortlog history) ],
 515         );
 516
 517         # fill %input_params with the CGI parameters. All values except for 'opt'
 518         # should be single values, but opt can be an array. We should probably
 519         # build an array of parameters that can be multi-valued, but since for the time
 520         # being it's only this one, we just single it out
 521         while (my ($name, $symbol) = each %cgi_param_mapping) {
 522                 if ($symbol eq 'opt') {
 523                         $input_params{$name} = [ $c->req->param($symbol) ];
 524                 } else {
 525                         $input_params{$name} = $c->req->param($symbol);
 526                 }
 527         }
 528
 529         # now read PATH_INFO and update the parameter list for missing parameters
 530         my $evaluate_path_info = sub {
 531                 return if defined $input_params{'project'};
 532                 return if !$path_info;
 533                 $path_info =~ s,^/+,,;
 534                 return if !$path_info;
 535
 536                 # find which part of PATH_INFO is project
 537                 my $project = $path_info;
 538                 $project =~ s,/+$,,;
 539                 while ($project && !check_head_link("$projectroot/$project")) {
 540                         $project =~ s,/*[^/]*$,,;
 541                 }
 542                 return unless $project;
 543                 $input_params{'project'} = $project;
 544
 545                 # do not change any parameters if an action is given using the query string
 546                 return if $input_params{'action'};
 547                 $path_info =~ s,^\Q$project\E/*,,;
 548
 549                 # next, check if we have an action
 550                 my $action = $path_info;
 551                 $action =~ s,/.*$,,;
 552                 if (exists $actions{$action}) {
 553                         $path_info =~ s,^$action/*,,;
 554                         $input_params{'action'} = $action;
 555                 }
 556
 557                 # list of actions that want hash_base instead of hash, but can have no
 558                 # pathname (f) parameter
 559                 my @wants_base = (
 560                         'tree',
 561                         'history',
 562                 );
 563
 564                 # we want to catch
 565                 # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 566                 my ($parentrefname, $parentpathname, $refname, $pathname) =
 567                         ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 568
 569                 # first, analyze the 'current' part
 570                 if (defined $pathname) {
 571                         # we got "branch:filename" or "branch:dir/"
 572                         # we could use git_get_type(branch:pathname), but:
 573                         # - it needs $git_dir
 574                         # - it does a git() call
 575                         # - the convention of terminating directories with a slash
 576                         #   makes it superfluous
 577                         # - embedding the action in the PATH_INFO would make it even
 578                         #   more superfluous
 579                         $pathname =~ s,^/+,,;
 580                         if (!$pathname || substr($pathname, -1) eq "/") {
 581                                 $input_params{'action'} ||= "tree";
 582                                 $pathname =~ s,/$,,;
 583                         } else {
 584                                 # the default action depends on whether we had parent info
 585                                 # or not
 586                                 if ($parentrefname) {
 587                                         $input_params{'action'} ||= "blobdiff_plain";
 588                                 } else {
 589                                         $input_params{'action'} ||= "blob_plain";
 590                                 }
 591                         }
 592                         $input_params{'hash_base'} ||= $refname;
 593                         $input_params{'file_name'} ||= $pathname;
 594                 } elsif (defined $refname) {
 595                         # we got "branch". In this case we have to choose if we have to
 596                         # set hash or hash_base.
 597                         #
 598                         # Most of the actions without a pathname only want hash to be
 599                         # set, except for the ones specified in @wants_base that want
 600                         # hash_base instead. It should also be noted that hand-crafted
 601                         # links having 'history' as an action and no pathname or hash
 602                         # set will fail, but that happens regardless of PATH_INFO.
 603                         $input_params{'action'} ||= "shortlog";
 604                         if (grep { $_ eq $input_params{'action'} } @wants_base) {
 605                                 $input_params{'hash_base'} ||= $refname;
 606                         } else {
 607                                 $input_params{'hash'} ||= $refname;
 608                         }
 609                 }
 610
 611                 # next, handle the 'parent' part, if present
 612                 if (defined $parentrefname) {
 613                         # a missing pathspec defaults to the 'current' filename, allowing e.g.
 614                         # someproject/blobdiff/oldrev..newrev:/filename
 615                         if ($parentpathname) {
 616                                 $parentpathname =~ s,^/+,,;
 617                                 $parentpathname =~ s,/$,,;
 618                                 $input_params{'file_parent'} ||= $parentpathname;
 619                         } else {
 620                                 $input_params{'file_parent'} ||= $input_params{'file_name'};
 621                         }
 622                         # we assume that hash_parent_base is wanted if a path was specified,
 623                         # or if the action wants hash_base instead of hash
 624                         if (defined $input_params{'file_parent'} ||
 625                                 grep { $_ eq $input_params{'action'} } @wants_base) {
 626                                 $input_params{'hash_parent_base'} ||= $parentrefname;
 627                         } else {
 628                                 $input_params{'hash_parent'} ||= $parentrefname;
 629                         }
 630                 }
 631
 632                 # for the snapshot action, we allow URLs in the form
 633                 # $project/snapshot/$hash.ext
 634                 # where .ext determines the snapshot and gets removed from the
 635                 # passed $refname to provide the $hash.
 636                 #
 637                 # To be able to tell that $refname includes the format extension, we
 638                 # require the following two conditions to be satisfied:
 639                 # - the hash input parameter MUST have been set from the $refname part
 640                 #   of the URL (i.e. they must be equal)
 641                 # - the snapshot format MUST NOT have been defined already (e.g. from
 642                 #   CGI parameter sf)
 643                 # It's also useless to try any matching unless $refname has a dot,
 644                 # so we check for that too
 645                 if (defined $input_params{'action'} &&
 646                         $input_params{'action'} eq 'snapshot' &&
 647                         defined $refname && index($refname, '.') != -1 &&
 648                         $refname eq $input_params{'hash'} &&
 649                         !defined $input_params{'snapshot_format'}) {
 650                         # We loop over the known snapshot formats, checking for
 651                         # extensions. Allowed extensions are both the defined suffix
 652                         # (which includes the initial dot already) and the snapshot
 653                         # format key itself, with a prepended dot
 654                         while (my ($fmt, $opt) = each %known_snapshot_formats) {
 655                                 my $hash = $refname;
 656                                 my $sfx;
 657                                 $hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//;
 658                                 next unless $sfx = $1;
 659                                 # a valid suffix was found, so set the snapshot format
 660                                 # and reset the hash parameter
 661                                 $input_params{'snapshot_format'} = $fmt;
 662                                 $input_params{'hash'} = $hash;
 663                                 # we also set the format suffix to the one requested
 664                                 # in the URL: this way a request for e.g. .tgz returns
 665                                 # a .tgz instead of a .tar.gz
 666                                 $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 667                                 last;
 668                         }
 669                 }
 670         };
 671
 672         &$evaluate_path_info();
 673
 674         gitweb_validate_setup();
 675
 676         return $actions{$action};
 677 }
 678
 679 sub gitweb_validate_setup {
 680         our $action = $input_params{'action'};
 681         if (defined $action) {
 682                 if (!validate_action($action)) {
 683                         die_error(400, "Invalid action parameter");
 684                 }
 685         }
 686
 687         # parameters which are pathnames
 688         our $project = $input_params{'project'};
 689         if (defined $project) {
 690                 if (!validate_project($project)) {
 691                         undef $project;
 692                         die_error(404, "No such project");
 693                 }
 694         }
 695
 696         our $file_name = $input_params{'file_name'};
 697         if (defined $file_name) {
 698                 if (!validate_pathname($file_name)) {
 699                         die_error(400, "Invalid file parameter");
 700                 }
 701         }
 702
 703         our $file_parent = $input_params{'file_parent'};
 704         if (defined $file_parent) {
 705                 if (!validate_pathname($file_parent)) {
 706                         die_error(400, "Invalid file parent parameter");
 707                 }
 708         }
 709
 710         # parameters which are refnames
 711         our $hash = $input_params{'hash'};
 712         if (defined $hash) {
 713                 if (!validate_refname($hash)) {
 714                         die_error(400, "Invalid hash parameter");
 715                 }
 716         }
 717
 718         our $hash_parent = $input_params{'hash_parent'};
 719         if (defined $hash_parent) {
 720                 if (!validate_refname($hash_parent)) {
 721                         die_error(400, "Invalid hash parent parameter");
 722                 }
 723         }
 724
 725         our $hash_base = $input_params{'hash_base'};
 726         if (defined $hash_base) {
 727                 if (!validate_refname($hash_base)) {
 728                         die_error(400, "Invalid hash base parameter");
 729                 }
 730         }
 731
 732         our @extra_options = @{$input_params{'extra_options'}};
 733         # @extra_options is always defined, since it can only be (currently) set from
 734         # CGI, and $c->req->param() returns the empty array in array context if the param
 735         # is not set
 736         foreach my $opt (@extra_options) {
 737                 if (not exists $allowed_options{$opt}) {
 738                         die_error(400, "Invalid option parameter");
 739                 }
 740                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 741                         die_error(400, "Invalid option parameter for this action");
 742                 }
 743         }
 744
 745         our $hash_parent_base = $input_params{'hash_parent_base'};
 746         if (defined $hash_parent_base) {
 747                 if (!validate_refname($hash_parent_base)) {
 748                         die_error(400, "Invalid hash parent base parameter");
 749                 }
 750         }
 751
 752         # other parameters
 753         our $page = $input_params{'page'};
 754         if (defined $page) {
 755                 if ($page =~ m/[^0-9]/) {
 756                         die_error(400, "Invalid page parameter");
 757                 }
 758         }
 759
 760         our $searchtype = $input_params{'searchtype'};
 761         if (defined $searchtype) {
 762                 if ($searchtype =~ m/[^a-z]/) {
 763                         die_error(400, "Invalid searchtype parameter");
 764                 }
 765         }
 766
 767         our $search_use_regexp = $input_params{'search_use_regexp'};
 768
 769         our $searchtext = $input_params{'searchtext'};
 770         our $search_regexp;
 771         if (defined $searchtext) {
 772                 if (length($searchtext) < 2) {
 773                         die_error(403, "At least two characters are required for search parameter");
 774                 }
 775                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 776         }
 777
 778         # path to the current git repository
 779         our $git_dir;
 780         $git_dir = "$projectroot/$project" if $project;
 781
 782         # process alternate names for backward compatibility
 783         # filter out unsupported (unknown) snapshot formats
 784         my $filter_snapshot_fmts = sub {
 785                 my @fmts = @_;
 786
 787                 @fmts = map {
 788                         exists $known_snapshot_format_aliases{$_} ?
 789                                $known_snapshot_format_aliases{$_} : $_} @fmts;
 790                 @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 791
 792         };
 793         # list of supported snapshot formats
 794         our @snapshot_fmts = gitweb_get_feature('snapshot');
 795         @snapshot_fmts = &$filter_snapshot_fmts(@snapshot_fmts);
 796
 797         # dispatch
 798         if (!defined $action) {
 799                 if (defined $hash) {
 800                         $action = git_get_type($hash);
 801                 } elsif (defined $hash_base && defined $file_name) {
 802                         $action = git_get_type("$hash_base:$file_name");
 803                 } elsif (defined $project) {
 804                         $action = 'summary';
 805                 } else {
 806                         $action = 'project_list';
 807                 }
 808         }
 809         if (!defined($actions{$action})) {
 810                 die_error(400, "Unknown action");
 811         }
 812         if ($action !~ m/^(opml|project_list|project_index)$/ &&
 813             !$project) {
 814                 die_error(400, "Project needed");
 815         }
 816 }
 817
 818 sub gitweb_get_feature {
 819         my ($name) = @_;
 820         return unless exists $feature{$name};
 821         my ($sub, $override, @defaults) = (
 822                 $feature{$name}{'sub'},
 823                 $feature{$name}{'override'},
 824                 @{$feature{$name}{'default'}});
 825         if (!$override) { return @defaults; }
 826         if (!defined $sub) {
 827                 warn "feature $name is not overrideable";
 828                 return @defaults;
 829         }
 830         return $sub->(@defaults);
 831 }
 832
 833 # A wrapper to check if a given feature is enabled.
 834 # With this, you can say
 835 #
 836 #   my $bool_feat = gitweb_check_feature('bool_feat');
 837 #   gitweb_check_feature('bool_feat') or somecode;
 838 #
 839 # instead of
 840 #
 841 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 842 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 843 #
 844 sub gitweb_check_feature {
 845         return (gitweb_get_feature(@_))[0];
 846 }
 847
 848 # checking HEAD file with -e is fragile if the repository was
 849 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 850 # and then pruned.
 851 sub check_head_link {
 852         my ($dir) = @_;
 853         my $headfile = "$dir/HEAD";
 854         return ((-e $headfile) ||
 855                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 856 }
 857
 858 sub check_export_ok {
 859         my ($dir) = @_;
 860         return (check_head_link($dir) &&
 861                 (!$export_ok || -e "$dir/$export_ok") &&
 862                 (!$export_auth_hook || $export_auth_hook->($dir)));
 863 }
 864
 865
 866 ## ======================================================================
 867 ## action links
 868
 869 sub href (%) {
 870         my %params = @_;
 871         # default is to use -absolute url() i.e. $my_uri
 872         my $href = $params{-full} ? $my_url : $my_uri;
 873
 874         $params{'project'} = $project unless exists $params{'project'};
 875
 876         if ($params{-replay}) {
 877                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 878                         if (!exists $params{$name}) {
 879                                 $params{$name} = $input_params{$name};
 880                         }
 881                 }
 882         }
 883
 884         my $use_pathinfo = gitweb_check_feature('pathinfo');
 885         if ($use_pathinfo and defined $params{'project'}) {
 886                 # try to put as many parameters as possible in PATH_INFO:
 887                 #   - project name
 888                 #   - action
 889                 #   - hash_parent or hash_parent_base:/file_parent
 890                 #   - hash or hash_base:/filename
 891                 #   - the snapshot_format as an appropriate suffix
 892
 893                 # When the script is the root DirectoryIndex for the domain,
 894                 # $href here would be something like http://gitweb.example.com/
 895                 # Thus, we strip any trailing / from $href, to spare us double
 896                 # slashes in the final URL
 897                 $href =~ s,/$,,;
 898
 899                 # Then add the project name, if present
 900                 $href .= "/".esc_url($params{'project'});
 901                 delete $params{'project'};
 902
 903                 # since we destructively absorb parameters, we keep this
 904                 # boolean that remembers if we're handling a snapshot
 905                 my $is_snapshot = $params{'action'} eq 'snapshot';
 906
 907                 # Summary just uses the project path URL, any other action is
 908                 # added to the URL
 909                 if (defined $params{'action'}) {
 910                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 911                         delete $params{'action'};
 912                 }
 913
 914                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 915                 # stripping nonexistent or useless pieces
 916                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 917                         || $params{'hash_parent'} || $params{'hash'});
 918                 if (defined $params{'hash_base'}) {
 919                         if (defined $params{'hash_parent_base'}) {
 920                                 $href .= esc_url($params{'hash_parent_base'});
 921                                 # skip the file_parent if it's the same as the file_name
 922                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 923                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 924                                         $href .= ":/".esc_url($params{'file_parent'});
 925                                         delete $params{'file_parent'};
 926                                 }
 927                                 $href .= "..";
 928                                 delete $params{'hash_parent'};
 929                                 delete $params{'hash_parent_base'};
 930                         } elsif (defined $params{'hash_parent'}) {
 931                                 $href .= esc_url($params{'hash_parent'}). "..";
 932                                 delete $params{'hash_parent'};
 933                         }
 934
 935                         $href .= esc_url($params{'hash_base'});
 936                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 937                                 $href .= ":/".esc_url($params{'file_name'});
 938                                 delete $params{'file_name'};
 939                         }
 940                         delete $params{'hash'};
 941                         delete $params{'hash_base'};
 942                 } elsif (defined $params{'hash'}) {
 943                         $href .= esc_url($params{'hash'});
 944                         delete $params{'hash'};
 945                 }
 946
 947                 # If the action was a snapshot, we can absorb the
 948                 # snapshot_format parameter too
 949                 if ($is_snapshot) {
 950                         my $fmt = $params{'snapshot_format'};
 951                         # snapshot_format should always be defined when href()
 952                         # is called, but just in case some code forgets, we
 953                         # fall back to the default
 954                         $fmt ||= $snapshot_fmts[0];
 955                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 956                         delete $params{'snapshot_format'};
 957                 }
 958         }
 959
 960         # now encode the parameters explicitly
 961         my @result = ();
 962         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 963                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 964                 if (defined $params{$name}) {
 965                         if (ref($params{$name}) eq "ARRAY") {
 966                                 foreach my $par (@{$params{$name}}) {
 967                                         push @result, $symbol . "=" . esc_param($par);
 968                                 }
 969                         } else {
 970                                 push @result, $symbol . "=" . esc_param($params{$name});
 971                         }
 972                 }
 973         }
 974         $href .= "?" . join(';', @result) if scalar @result;
 975
 976         return $href;
 977 }
 978
 979
 980 ## ======================================================================
 981 ## validation, quoting/unquoting and escaping
 982
 983 sub validate_action {
 984         my $input = shift || return undef;
 985         return undef unless exists $actions{$input};
 986         return $input;
 987 }
 988
 989 sub validate_project {
 990         my $input = shift || return undef;
 991         if (!validate_pathname($input) ||
 992                 !(-d "$projectroot/$input") ||
 993                 !check_export_ok("$projectroot/$input") ||
 994                 ($strict_export && !project_in_list($input))) {
 995                 return undef;
 996         } else {
 997                 return $input;
 998         }
 999 }
1000
1001 sub validate_pathname {
1002         my $input = shift || return undef;
1003
1004         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1005         # at the beginning, at the end, and between slashes.
1006         # also this catches doubled slashes
1007         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1008                 return undef;
1009         }
1010         # no null characters
1011         if ($input =~ m!\0!) {
1012                 return undef;
1013         }
1014         return $input;
1015 }
1016
1017 sub validate_refname {
1018         my $input = shift || return undef;
1019
1020         # textual hashes are O.K.
1021         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1022                 return $input;
1023         }
1024         # it must be correct pathname
1025         $input = validate_pathname($input)
1026                 or return undef;
1027         # restrictions on ref name according to git-check-ref-format
1028         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1029                 return undef;
1030         }
1031         return $input;
1032 }
1033
1034 # decode sequences of octets in utf8 into Perl's internal form,
1035 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1036 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1037 sub to_utf8 {
1038         my $str = shift;
1039         if (utf8::valid($str)) {
1040                 utf8::decode($str);
1041                 return $str;
1042         } else {
1043                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1044         }
1045 }
1046
1047 # quote unsafe chars, but keep the slash, even when it's not
1048 # correct, but quoted slashes look too horrible in bookmarks
1049 sub esc_param {
1050         my $str = shift;
1051         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1052         $str =~ s/\+/%2B/g;
1053         $str =~ s/ /\+/g;
1054         return $str;
1055 }
1056
1057 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1058 sub esc_url {
1059         my $str = shift;
1060         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1061         $str =~ s/\+/%2B/g;
1062         $str =~ s/ /\+/g;
1063         return $str;
1064 }
1065
1066 # replace invalid utf8 character with SUBSTITUTION sequence
1067 sub esc_html ($;%) {
1068         my $str = shift;
1069         my %opts = @_;
1070
1071         $str = to_utf8($str);
1072         $str = $cgi->escapeHTML($str);
1073         if ($opts{'-nbsp'}) {
1074                 $str =~ s/ /&nbsp;/g;
1075         }
1076         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1077         return $str;
1078 }
1079
1080 # quote control characters and escape filename to HTML
1081 sub esc_path {
1082         my $str = shift;
1083         my %opts = @_;
1084
1085         $str = to_utf8($str);
1086         $str = $cgi->escapeHTML($str);
1087         if ($opts{'-nbsp'}) {
1088                 $str =~ s/ /&nbsp;/g;
1089         }
1090         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1091         return $str;
1092 }
1093
1094 # Make control characters "printable", using character escape codes (CEC)
1095 sub quot_cec {
1096         my $cntrl = shift;
1097         my %opts = @_;
1098         my %es = ( # character escape codes, aka escape sequences
1099                 "\t" => '\t',   # tab            (HT)
1100                 "\n" => '\n',   # line feed      (LF)
1101                 "\r" => '\r',   # carrige return (CR)
1102                 "\f" => '\f',   # form feed      (FF)
1103                 "\b" => '\b',   # backspace      (BS)
1104                 "\a" => '\a',   # alarm (bell)   (BEL)
1105                 "\e" => '\e',   # escape         (ESC)
1106                 "\013" => '\v', # vertical tab   (VT)
1107                 "\000" => '\0', # nul character  (NUL)
1108         );
1109         my $chr = ( (exists $es{$cntrl})
1110                     ? $es{$cntrl}
1111                     : sprintf('\%2x', ord($cntrl)) );
1112         if ($opts{-nohtml}) {
1113                 return $chr;
1114         } else {
1115                 return "<span class=\"cntrl\">$chr</span>";
1116         }
1117 }
1118
1119 # Alternatively use unicode control pictures codepoints,
1120 # Unicode "printable representation" (PR)
1121 sub quot_upr {
1122         my $cntrl = shift;
1123         my %opts = @_;
1124
1125         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1126         if ($opts{-nohtml}) {
1127                 return $chr;
1128         } else {
1129                 return "<span class=\"cntrl\">$chr</span>";
1130         }
1131 }
1132
1133 # git may return quoted and escaped filenames
1134 sub unquote {
1135         my $str = shift;
1136
1137         sub unq {
1138                 my $seq = shift;
1139                 my %es = ( # character escape codes, aka escape sequences
1140                         't' => "\t",   # tab            (HT, TAB)
1141                         'n' => "\n",   # newline        (NL)
1142                         'r' => "\r",   # return         (CR)
1143                         'f' => "\f",   # form feed      (FF)
1144                         'b' => "\b",   # backspace      (BS)
1145                         'a' => "\a",   # alarm (bell)   (BEL)
1146                         'e' => "\e",   # escape         (ESC)
1147                         'v' => "\013", # vertical tab   (VT)
1148                 );
1149
1150                 if ($seq =~ m/^[0-7]{1,3}$/) {
1151                         # octal char sequence
1152                         return chr(oct($seq));
1153                 } elsif (exists $es{$seq}) {
1154                         # C escape sequence, aka character escape code
1155                         return $es{$seq};
1156                 }
1157                 # quoted ordinary character
1158                 return $seq;
1159         }
1160
1161         if ($str =~ m/^"(.*)"$/) {
1162                 # needs unquoting
1163                 $str = $1;
1164                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1165         }
1166         return $str;
1167 }
1168
1169 # escape tabs (convert tabs to spaces)
1170 sub untabify {
1171         my $line = shift;
1172
1173         while ((my $pos = index($line, "\t")) != -1) {
1174                 if (my $count = (8 - ($pos % 8))) {
1175                         my $spaces = ' ' x $count;
1176                         $line =~ s/\t/$spaces/;
1177                 }
1178         }
1179
1180         return $line;
1181 }
1182
1183 sub project_in_list {
1184         my $project = shift;
1185         my @list = git_get_projects_list();
1186         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1187 }
1188
1189 ## ----------------------------------------------------------------------
1190 ## HTML aware string manipulation
1191
1192 # Try to chop given string on a word boundary between position
1193 # $len and $len+$add_len. If there is no word boundary there,
1194 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1195 # (marking chopped part) would be longer than given string.
1196 sub chop_str {
1197         my $str = shift;
1198         my $len = shift;
1199         my $add_len = shift || 10;
1200         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1201
1202         # Make sure perl knows it is utf8 encoded so we don't
1203         # cut in the middle of a utf8 multibyte char.
1204         $str = to_utf8($str);
1205
1206         # allow only $len chars, but don't cut a word if it would fit in $add_len
1207         # if it doesn't fit, cut it if it's still longer than the dots we would add
1208         # remove chopped character entities entirely
1209
1210         # when chopping in the middle, distribute $len into left and right part
1211         # return early if chopping wouldn't make string shorter
1212         if ($where eq 'center') {
1213                 return $str if ($len + 5 >= length($str)); # filler is length 5
1214                 $len = int($len/2);
1215         } else {
1216                 return $str if ($len + 4 >= length($str)); # filler is length 4
1217         }
1218
1219         # regexps: ending and beginning with word part up to $add_len
1220         my $endre = qr/.{$len}\w{0,$add_len}/;
1221         my $begre = qr/\w{0,$add_len}.{$len}/;
1222
1223         if ($where eq 'left') {
1224                 $str =~ m/^(.*?)($begre)$/;
1225                 my ($lead, $body) = ($1, $2);
1226                 if (length($lead) > 4) {
1227                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1228                         $lead = " ...";
1229                 }
1230                 return "$lead$body";
1231
1232         } elsif ($where eq 'center') {
1233                 $str =~ m/^($endre)(.*)$/;
1234                 my ($left, $str)  = ($1, $2);
1235                 $str =~ m/^(.*?)($begre)$/;
1236                 my ($mid, $right) = ($1, $2);
1237                 if (length($mid) > 5) {
1238                         $left  =~ s/&[^;]*$//;
1239                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1240                         $mid = " ... ";
1241                 }
1242                 return "$left$mid$right";
1243
1244         } else {
1245                 $str =~ m/^($endre)(.*)$/;
1246                 my $body = $1;
1247                 my $tail = $2;
1248                 if (length($tail) > 4) {
1249                         $body =~ s/&[^;]*$//;
1250                         $tail = "... ";
1251                 }
1252                 return "$body$tail";
1253         }
1254 }
1255
1256 # takes the same arguments as chop_str, but also wraps a <span> around the
1257 # result with a title attribute if it does get chopped. Additionally, the
1258 # string is HTML-escaped.
1259 sub chop_and_escape_str {
1260         my ($str) = @_;
1261
1262         my $chopped = chop_str(@_);
1263         if ($chopped eq $str) {
1264                 return esc_html($chopped);
1265         } else {
1266                 $str =~ s/([[:cntrl:]])/?/g;
1267                 return $cgi->span({-title=>$str}, esc_html($chopped));
1268         }
1269 }
1270
1271 ## ----------------------------------------------------------------------
1272 ## functions returning short strings
1273
1274 # CSS class for given age value (in seconds)
1275 sub age_class {
1276         my $age = shift;
1277
1278         if (!defined $age) {
1279                 return "noage";
1280         } elsif ($age < 60*60*2) {
1281                 return "age0";
1282         } elsif ($age < 60*60*24*2) {
1283                 return "age1";
1284         } else {
1285                 return "age2";
1286         }
1287 }
1288
1289 # convert age in seconds to "nn units ago" string
1290 sub age_string {
1291         my $age = shift;
1292         my $age_str;
1293
1294         if ($age > 60*60*24*365*2) {
1295                 $age_str = (int $age/60/60/24/365);
1296                 $age_str .= " years ago";
1297         } elsif ($age > 60*60*24*(365/12)*2) {
1298                 $age_str = int $age/60/60/24/(365/12);
1299                 $age_str .= " months ago";
1300         } elsif ($age > 60*60*24*7*2) {
1301                 $age_str = int $age/60/60/24/7;
1302                 $age_str .= " weeks ago";
1303         } elsif ($age > 60*60*24*2) {
1304                 $age_str = int $age/60/60/24;
1305                 $age_str .= " days ago";
1306         } elsif ($age > 60*60*2) {
1307                 $age_str = int $age/60/60;
1308                 $age_str .= " hours ago";
1309         } elsif ($age > 60*2) {
1310                 $age_str = int $age/60;
1311                 $age_str .= " min ago";
1312         } elsif ($age > 2) {
1313                 $age_str = int $age;
1314                 $age_str .= " sec ago";
1315         } else {
1316                 $age_str .= " right now";
1317         }
1318         return $age_str;
1319 }
1320
1321 use constant {
1322         S_IFINVALID => 0030000,
1323         S_IFGITLINK => 0160000,
1324 };
1325
1326 # submodule/subproject, a commit object reference
1327 sub S_ISGITLINK($) {
1328         my $mode = shift;
1329
1330         return (($mode & S_IFMT) == S_IFGITLINK)
1331 }
1332
1333 # convert file mode in octal to symbolic file mode string
1334 sub mode_str {
1335         my $mode = oct shift;
1336
1337         if (S_ISGITLINK($mode)) {
1338                 return 'm---------';
1339         } elsif (S_ISDIR($mode & S_IFMT)) {
1340                 return 'drwxr-xr-x';
1341         } elsif (S_ISLNK($mode)) {
1342                 return 'lrwxrwxrwx';
1343         } elsif (S_ISREG($mode)) {
1344                 # git cares only about the executable bit
1345                 if ($mode & S_IXUSR) {
1346                         return '-rwxr-xr-x';
1347                 } else {
1348                         return '-rw-r--r--';
1349                 };
1350         } else {
1351                 return '----------';
1352         }
1353 }
1354
1355 # convert file mode in octal to file type string
1356 sub file_type {
1357         my $mode = shift;
1358
1359         if ($mode !~ m/^[0-7]+$/) {
1360                 return $mode;
1361         } else {
1362                 $mode = oct $mode;
1363         }
1364
1365         if (S_ISGITLINK($mode)) {
1366                 return "submodule";
1367         } elsif (S_ISDIR($mode & S_IFMT)) {
1368                 return "directory";
1369         } elsif (S_ISLNK($mode)) {
1370                 return "symlink";
1371         } elsif (S_ISREG($mode)) {
1372                 return "file";
1373         } else {
1374                 return "unknown";
1375         }
1376 }
1377
1378 # convert file mode in octal to file type description string
1379 sub file_type_long {
1380         my $mode = shift;
1381
1382         if ($mode !~ m/^[0-7]+$/) {
1383                 return $mode;
1384         } else {
1385                 $mode = oct $mode;
1386         }
1387
1388         if (S_ISGITLINK($mode)) {
1389                 return "submodule";
1390         } elsif (S_ISDIR($mode & S_IFMT)) {
1391                 return "directory";
1392         } elsif (S_ISLNK($mode)) {
1393                 return "symlink";
1394         } elsif (S_ISREG($mode)) {
1395                 if ($mode & S_IXUSR) {
1396                         return "executable";
1397                 } else {
1398                         return "file";
1399                 };
1400         } else {
1401                 return "unknown";
1402         }
1403 }
1404
1405
1406 ## ----------------------------------------------------------------------
1407 ## functions returning short HTML fragments, or transforming HTML fragments
1408 ## which don't belong to other sections
1409
1410 # format line of commit message.
1411 sub format_log_line_html {
1412         my $line = shift;
1413
1414         $line = esc_html($line, -nbsp=>1);
1415         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1416                 $cgi->a({-href => href(action=>"object", hash=>$1),
1417                                         -class => "text"}, $1);
1418         }eg;
1419
1420         return $line;
1421 }
1422
1423 # format marker of refs pointing to given object
1424
1425 # the destination action is chosen based on object type and current context:
1426 # - for annotated tags, we choose the tag view unless it's the current view
1427 #   already, in which case we go to shortlog view
1428 # - for other refs, we keep the current view if we're in history, shortlog or
1429 #   log view, and select shortlog otherwise
1430 sub format_ref_marker {
1431         my ($refs, $id) = @_;
1432         my $markers = '';
1433
1434         if (defined $refs->{$id}) {
1435                 foreach my $ref (@{$refs->{$id}}) {
1436                         # this code exploits the fact that non-lightweight tags are the
1437                         # only indirect objects, and that they are the only objects for which
1438                         # we want to use tag instead of shortlog as action
1439                         my ($type, $name) = qw();
1440                         my $indirect = ($ref =~ s/\^\{\}$//);
1441                         # e.g. tags/v2.6.11 or heads/next
1442                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1443                                 $type = $1;
1444                                 $name = $2;
1445                         } else {
1446                                 $type = "ref";
1447                                 $name = $ref;
1448                         }
1449
1450                         my $class = $type;
1451                         $class .= " indirect" if $indirect;
1452
1453                         my $dest_action = "shortlog";
1454
1455                         if ($indirect) {
1456                                 $dest_action = "tag" unless $action eq "tag";
1457                         } elsif ($action =~ /^(history|(short)?log)$/) {
1458                                 $dest_action = $action;
1459                         }
1460
1461                         my $dest = "";
1462                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1463                         $dest .= $ref;
1464
1465                         my $link = $cgi->a({
1466                                 -href => href(
1467                                         action=>$dest_action,
1468                                         hash=>$dest
1469                                 )}, $name);
1470
1471                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1472                                 $link . "</span>";
1473                 }
1474         }
1475
1476         if ($markers) {
1477                 return ' <span class="refs">'. $markers . '</span>';
1478         } else {
1479                 return "";
1480         }
1481 }
1482
1483 # format, perhaps shortened and with markers, title line
1484 sub format_subject_html {
1485         my ($long, $short, $href, $extra) = @_;
1486         $extra = '' unless defined($extra);
1487
1488         if (length($short) < length($long)) {
1489                 return $cgi->a({-href => $href, -class => "list subject",
1490                                 -title => to_utf8($long)},
1491                        esc_html($short) . $extra);
1492         } else {
1493                 return $cgi->a({-href => $href, -class => "list subject"},
1494                        esc_html($long)  . $extra);
1495         }
1496 }
1497
1498 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1499 sub format_git_diff_header_line {
1500         my $line = shift;
1501         my $diffinfo = shift;
1502         my ($from, $to) = @_;
1503
1504         if ($diffinfo->{'nparents'}) {
1505                 # combined diff
1506                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1507                 if ($to->{'href'}) {
1508                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1509                                          esc_path($to->{'file'}));
1510                 } else { # file was deleted (no href)
1511                         $line .= esc_path($to->{'file'});
1512                 }
1513         } else {
1514                 # "ordinary" diff
1515                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1516                 if ($from->{'href'}) {
1517                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1518                                          'a/' . esc_path($from->{'file'}));
1519                 } else { # file was added (no href)
1520                         $line .= 'a/' . esc_path($from->{'file'});
1521                 }
1522                 $line .= ' ';
1523                 if ($to->{'href'}) {
1524                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1525                                          'b/' . esc_path($to->{'file'}));
1526                 } else { # file was deleted
1527                         $line .= 'b/' . esc_path($to->{'file'});
1528                 }
1529         }
1530
1531         return "<div class=\"diff header\">$line</div>\n";
1532 }
1533
1534 # format extended diff header line, before patch itself
1535 sub format_extended_diff_header_line {
1536         my $line = shift;
1537         my $diffinfo = shift;
1538         my ($from, $to) = @_;
1539
1540         # match <path>
1541         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1542                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1543                                        esc_path($from->{'file'}));
1544         }
1545         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1546                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1547                                  esc_path($to->{'file'}));
1548         }
1549         # match single <mode>
1550         if ($line =~ m/\s(\d{6})$/) {
1551                 $line .= '<span class="info"> (' .
1552                          file_type_long($1) .
1553                          ')</span>';
1554         }
1555         # match <hash>
1556         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1557                 # can match only for combined diff
1558                 $line = 'index ';
1559                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1560                         if ($from->{'href'}[$i]) {
1561                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1562                                                   -class=>"hash"},
1563                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1564                         } else {
1565                                 $line .= '0' x 7;
1566                         }
1567                         # separator
1568                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1569                 }
1570                 $line .= '..';
1571                 if ($to->{'href'}) {
1572                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1573                                          substr($diffinfo->{'to_id'},0,7));
1574                 } else {
1575                         $line .= '0' x 7;
1576                 }
1577
1578         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1579                 # can match only for ordinary diff
1580                 my ($from_link, $to_link);
1581                 if ($from->{'href'}) {
1582                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1583                                              substr($diffinfo->{'from_id'},0,7));
1584                 } else {
1585                         $from_link = '0' x 7;
1586                 }
1587                 if ($to->{'href'}) {
1588                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1589                                            substr($diffinfo->{'to_id'},0,7));
1590                 } else {
1591                         $to_link = '0' x 7;
1592                 }
1593                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1594                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1595         }
1596
1597         return $line . "<br/>\n";
1598 }
1599
1600 # format from-file/to-file diff header
1601 sub format_diff_from_to_header {
1602         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1603         my $line;
1604         my $result = '';
1605
1606         $line = $from_line;
1607         #assert($line =~ m/^---/) if DEBUG;
1608         # no extra formatting for "^--- /dev/null"
1609         if (! $diffinfo->{'nparents'}) {
1610                 # ordinary (single parent) diff
1611                 if ($line =~ m!^--- "?a/!) {
1612                         if ($from->{'href'}) {
1613                                 $line = '--- a/' .
1614                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1615                                                 esc_path($from->{'file'}));
1616                         } else {
1617                                 $line = '--- a/' .
1618                                         esc_path($from->{'file'});
1619                         }
1620                 }
1621                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1622
1623         } else {
1624                 # combined diff (merge commit)
1625                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1626                         if ($from->{'href'}[$i]) {
1627                                 $line = '--- ' .
1628                                         $cgi->a({-href=>href(action=>"blobdiff",
1629                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1630                                                              hash_parent_base=>$parents[$i],
1631                                                              file_parent=>$from->{'file'}[$i],
1632                                                              hash=>$diffinfo->{'to_id'},
1633                                                              hash_base=>$hash,
1634                                                              file_name=>$to->{'file'}),
1635                                                  -class=>"path",
1636                                                  -title=>"diff" . ($i+1)},
1637                                                 $i+1) .
1638                                         '/' .
1639                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1640                                                 esc_path($from->{'file'}[$i]));
1641                         } else {
1642                                 $line = '--- /dev/null';
1643                         }
1644                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1645                 }
1646         }
1647
1648         $line = $to_line;
1649         #assert($line =~ m/^\+\+\+/) if DEBUG;
1650         # no extra formatting for "^+++ /dev/null"
1651         if ($line =~ m!^\+\+\+ "?b/!) {
1652                 if ($to->{'href'}) {
1653                         $line = '+++ b/' .
1654                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1655                                         esc_path($to->{'file'}));
1656                 } else {
1657                         $line = '+++ b/' .
1658                                 esc_path($to->{'file'});
1659                 }
1660         }
1661         $result .= qq!<div class="diff to_file">$line</div>\n!;
1662
1663         return $result;
1664 }
1665
1666 # create note for patch simplified by combined diff
1667 sub format_diff_cc_simplified {
1668         my ($diffinfo, @parents) = @_;
1669         my $result = '';
1670
1671         $result .= "<div class=\"diff header\">" .
1672                    "diff --cc ";
1673         if (!is_deleted($diffinfo)) {
1674                 $result .= $cgi->a({-href => href(action=>"blob",
1675                                                   hash_base=>$hash,
1676                                                   hash=>$diffinfo->{'to_id'},
1677                                                   file_name=>$diffinfo->{'to_file'}),
1678                                     -class => "path"},
1679                                    esc_path($diffinfo->{'to_file'}));
1680         } else {
1681                 $result .= esc_path($diffinfo->{'to_file'});
1682         }
1683         $result .= "</div>\n" . # class="diff header"
1684                    "<div class=\"diff nodifferences\">" .
1685                    "Simple merge" .
1686                    "</div>\n"; # class="diff nodifferences"
1687
1688         return $result;
1689 }
1690
1691 # format patch (diff) line (not to be used for diff headers)
1692 sub format_diff_line {
1693         my $line = shift;
1694         my ($from, $to) = @_;
1695         my $diff_class = "";
1696
1697         chomp $line;
1698
1699         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1700                 # combined diff
1701                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1702                 if ($line =~ m/^\@{3}/) {
1703                         $diff_class = " chunk_header";
1704                 } elsif ($line =~ m/^\\/) {
1705                         $diff_class = " incomplete";
1706                 } elsif ($prefix =~ tr/+/+/) {
1707                         $diff_class = " add";
1708                 } elsif ($prefix =~ tr/-/-/) {
1709                         $diff_class = " rem";
1710                 }
1711         } else {
1712                 # assume ordinary diff
1713                 my $char = substr($line, 0, 1);
1714                 if ($char eq '+') {
1715                         $diff_class = " add";
1716                 } elsif ($char eq '-') {
1717                         $diff_class = " rem";
1718                 } elsif ($char eq '@') {
1719                         $diff_class = " chunk_header";
1720                 } elsif ($char eq "\\") {
1721                         $diff_class = " incomplete";
1722                 }
1723         }
1724         $line = untabify($line);
1725         if ($from && $to && $line =~ m/^\@{2} /) {
1726                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1727                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1728
1729                 $from_lines = 0 unless defined $from_lines;
1730                 $to_lines   = 0 unless defined $to_lines;
1731
1732                 if ($from->{'href'}) {
1733                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1734                                              -class=>"list"}, $from_text);
1735                 }
1736                 if ($to->{'href'}) {
1737                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1738                                              -class=>"list"}, $to_text);
1739                 }
1740                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1741                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1742                 return "<div class=\"diff$diff_class\">$line</div>\n";
1743         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1744                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1745                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1746
1747                 @from_text = split(' ', $ranges);
1748                 for (my $i = 0; $i < @from_text; ++$i) {
1749                         ($from_start[$i], $from_nlines[$i]) =
1750                                 (split(',', substr($from_text[$i], 1)), 0);
1751                 }
1752
1753                 $to_text   = pop @from_text;
1754                 $to_start  = pop @from_start;
1755                 $to_nlines = pop @from_nlines;
1756
1757                 $line = "<span class=\"chunk_info\">$prefix ";
1758                 for (my $i = 0; $i < @from_text; ++$i) {
1759                         if ($from->{'href'}[$i]) {
1760                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1761                                                   -class=>"list"}, $from_text[$i]);
1762                         } else {
1763                                 $line .= $from_text[$i];
1764                         }
1765                         $line .= " ";
1766                 }
1767                 if ($to->{'href'}) {
1768                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1769                                           -class=>"list"}, $to_text);
1770                 } else {
1771                         $line .= $to_text;
1772                 }
1773                 $line .= " $prefix</span>" .
1774                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1775                 return "<div class=\"diff$diff_class\">$line</div>\n";
1776         }
1777         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1778 }
1779
1780 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1781 # linked.  Pass the hash of the tree/commit to snapshot.
1782 sub format_snapshot_links {
1783         my ($hash) = @_;
1784         my $num_fmts = @snapshot_fmts;
1785         if ($num_fmts > 1) {
1786                 # A parenthesized list of links bearing format names.
1787                 # e.g. "snapshot (_tar.gz_ _zip_)"
1788                 return "snapshot (" . join(' ', map
1789                         $cgi->a({
1790                                 -href => href(
1791                                         action=>"snapshot",
1792                                         hash=>$hash,
1793                                         snapshot_format=>$_
1794                                 )
1795                         }, $known_snapshot_formats{$_}{'display'})
1796                 , @snapshot_fmts) . ")";
1797         } elsif ($num_fmts == 1) {
1798                 # A single "snapshot" link whose tooltip bears the format name.
1799                 # i.e. "_snapshot_"
1800                 my ($fmt) = @snapshot_fmts;
1801                 return
1802                         $cgi->a({
1803                                 -href => href(
1804                                         action=>"snapshot",
1805                                         hash=>$hash,
1806                                         snapshot_format=>$fmt
1807                                 ),
1808                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1809                         }, "snapshot");
1810         } else { # $num_fmts == 0
1811                 return undef;
1812         }
1813 }
1814
1815 ## ......................................................................
1816 ## functions returning values to be passed, perhaps after some
1817 ## transformation, to other functions; e.g. returning arguments to href()
1818
1819 # returns hash to be passed to href to generate gitweb URL
1820 # in -title key it returns description of link
1821 sub get_feed_info {
1822         my $format = shift || 'Atom';
1823         my %res = (action => lc($format));
1824
1825         # feed links are possible only for project views
1826         return unless (defined $project);
1827         # some views should link to OPML, or to generic project feed,
1828         # or don't have specific feed yet (so they should use generic)
1829         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1830
1831         my $branch;
1832         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1833         # from tag links; this also makes possible to detect branch links
1834         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1835             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1836                 $branch = $1;
1837         }
1838         # find log type for feed description (title)
1839         my $type = 'log';
1840         if (defined $file_name) {
1841                 $type  = "history of $file_name";
1842                 $type .= "/" if ($action eq 'tree');
1843                 $type .= " on '$branch'" if (defined $branch);
1844         } else {
1845                 $type = "log of $branch" if (defined $branch);
1846         }
1847
1848         $res{-title} = $type;
1849         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1850         $res{'file_name'} = $file_name;
1851
1852         return %res;
1853 }
1854
1855 ## ----------------------------------------------------------------------
1856 ## git utility subroutines, invoking git commands
1857
1858 # returns path to the core git executable and the --git-dir parameter as list
1859 sub git_cmd {
1860         return $GIT, '--git-dir='.$git_dir;
1861 }
1862
1863 # quote the given arguments for passing them to the shell
1864 # quote_command("command", "arg 1", "arg with ' and ! characters")
1865 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1866 # Try to avoid using this function wherever possible.
1867 sub quote_command {
1868         return join(' ',
1869                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1870 }
1871
1872 # get HEAD ref of given project as hash
1873 sub git_get_head_hash {
1874         my $project = shift;
1875         my $o_git_dir = $git_dir;
1876         my $retval = undef;
1877         $git_dir = "$projectroot/$project";
1878         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1879                 my $head = <$fd>;
1880                 close $fd;
1881                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1882                         $retval = $1;
1883                 }
1884         }
1885         if (defined $o_git_dir) {
1886                 $git_dir = $o_git_dir;
1887         }
1888         return $retval;
1889 }
1890
1891 # get type of given object
1892 sub git_get_type {
1893         my $hash = shift;
1894
1895         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1896         my $type = <$fd>;
1897         close $fd or return;
1898         chomp $type;
1899         return $type;
1900 }
1901
1902 # repository configuration
1903 our $config_file = '';
1904 our %config;
1905
1906 # store multiple values for single key as anonymous array reference
1907 # single values stored directly in the hash, not as [ <value> ]
1908 sub hash_set_multi {
1909         my ($hash, $key, $value) = @_;
1910
1911         if (!exists $hash->{$key}) {
1912                 $hash->{$key} = $value;
1913         } elsif (!ref $hash->{$key}) {
1914                 $hash->{$key} = [ $hash->{$key}, $value ];
1915         } else {
1916                 push @{$hash->{$key}}, $value;
1917         }
1918 }
1919
1920 # return hash of git project configuration
1921 # optionally limited to some section, e.g. 'gitweb'
1922 sub git_parse_project_config {
1923         my $section_regexp = shift;
1924         my %config;
1925
1926         local $/ = "\0";
1927
1928         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1929                 or return;
1930
1931         while (my $keyval = <$fh>) {
1932                 chomp $keyval;
1933                 my ($key, $value) = split(/\n/, $keyval, 2);
1934
1935                 hash_set_multi(\%config, $key, $value)
1936                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1937         }
1938         close $fh;
1939
1940         return %config;
1941 }
1942
1943 # convert config value to boolean: 'true' or 'false'
1944 # no value, number > 0, 'true' and 'yes' values are true
1945 # rest of values are treated as false (never as error)
1946 sub config_to_bool {
1947         my $val = shift;
1948
1949         return 1 if !defined $val;             # section.key
1950
1951         # strip leading and trailing whitespace
1952         $val =~ s/^\s+//;
1953         $val =~ s/\s+$//;
1954
1955         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
1956                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1957 }
1958
1959 # convert config value to simple decimal number
1960 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1961 # to be multiplied by 1024, 1048576, or 1073741824
1962 sub config_to_int {
1963         my $val = shift;
1964
1965         # strip leading and trailing whitespace
1966         $val =~ s/^\s+//;
1967         $val =~ s/\s+$//;
1968
1969         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1970                 $unit = lc($unit);
1971                 # unknown unit is treated as 1
1972                 return $num * ($unit eq 'g' ? 1073741824 :
1973                                $unit eq 'm' ?    1048576 :
1974                                $unit eq 'k' ?       1024 : 1);
1975         }
1976         return $val;
1977 }
1978
1979 # convert config value to array reference, if needed
1980 sub config_to_multi {
1981         my $val = shift;
1982
1983         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1984 }
1985
1986 sub git_get_project_config {
1987         my ($key, $type) = @_;
1988
1989         # key sanity check
1990         return unless ($key);
1991         $key =~ s/^gitweb\.//;
1992         return if ($key =~ m/\W/);
1993
1994         # type sanity check
1995         if (defined $type) {
1996                 $type =~ s/^--//;
1997                 $type = undef
1998                         unless ($type eq 'bool' || $type eq 'int');
1999         }
2000
2001         # get config
2002         if (!defined $config_file ||
2003             $config_file ne "$git_dir/config") {
2004                 %config = git_parse_project_config('gitweb');
2005                 $config_file = "$git_dir/config";
2006         }
2007
2008         # check if config variable (key) exists
2009         return unless exists $config{"gitweb.$key"};
2010
2011         # ensure given type
2012         if (!defined $type) {
2013                 return $config{"gitweb.$key"};
2014         } elsif ($type eq 'bool') {
2015                 # backward compatibility: 'git config --bool' returns true/false
2016                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2017         } elsif ($type eq 'int') {
2018                 return config_to_int($config{"gitweb.$key"});
2019         }
2020         return $config{"gitweb.$key"};
2021 }
2022
2023 # get hash of given path at given ref
2024 sub git_get_hash_by_path {
2025         my $base = shift;
2026         my $path = shift || return undef;
2027         my $type = shift;
2028
2029         $path =~ s,/+$,,;
2030
2031         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2032                 or die_error(500, "Open git-ls-tree failed");
2033         my $line = <$fd>;
2034         close $fd or return undef;
2035
2036         if (!defined $line) {
2037                 # there is no tree or hash given by $path at $base
2038                 return undef;
2039         }
2040
2041         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2042         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2043         if (defined $type && $type ne $2) {
2044                 # type doesn't match
2045                 return undef;
2046         }
2047         return $3;
2048 }
2049
2050 # get path of entry with given hash at given tree-ish (ref)
2051 # used to get 'from' filename for combined diff (merge commit) for renames
2052 sub git_get_path_by_hash {
2053         my $base = shift || return;
2054         my $hash = shift || return;
2055
2056         local $/ = "\0";
2057
2058         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2059                 or return undef;
2060         while (my $line = <$fd>) {
2061                 chomp $line;
2062
2063                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2064                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2065                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2066                         close $fd;
2067                         return $1;
2068                 }
2069         }
2070         close $fd;
2071         return undef;
2072 }
2073
2074 ## ......................................................................
2075 ## git utility functions, directly accessing git repository
2076
2077 sub git_get_project_description {
2078         my $path = shift;
2079
2080         $git_dir = "$projectroot/$path";
2081         open my $fd, "$git_dir/description"
2082                 or return git_get_project_config('description');
2083         my $descr = <$fd>;
2084         close $fd;
2085         if (defined $descr) {
2086                 chomp $descr;
2087         }
2088         return $descr;
2089 }
2090
2091 sub git_get_project_ctags {
2092         my $path = shift;
2093         my $ctags = {};
2094
2095         $git_dir = "$projectroot/$path";
2096         unless (opendir D, "$git_dir/ctags") {
2097                 return $ctags;
2098         }
2099         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
2100                 open CT, $_ or next;
2101                 my $val = <CT>;
2102                 chomp $val;
2103                 close CT;
2104                 my $ctag = $_; $ctag =~ s#.*/##;
2105                 $ctags->{$ctag} = $val;
2106         }
2107         closedir D;
2108         $ctags;
2109 }
2110
2111 sub git_populate_project_tagcloud {
2112         my $ctags = shift;
2113
2114         # First, merge different-cased tags; tags vote on casing
2115         my %ctags_lc;
2116         foreach (keys %$ctags) {
2117                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2118                 if (not $ctags_lc{lc $_}->{topcount}
2119                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2120                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2121                         $ctags_lc{lc $_}->{topname} = $_;
2122                 }
2123         }
2124
2125         my $cloud;
2126         if (eval { require HTML::TagCloud; 1; }) {
2127                 $cloud = HTML::TagCloud->new;
2128                 foreach (sort keys %ctags_lc) {
2129                         # Pad the title with spaces so that the cloud looks
2130                         # less crammed.
2131                         my $title = $ctags_lc{$_}->{topname};
2132                         $title =~ s/ /&nbsp;/g;
2133                         $title =~ s/^/&nbsp;/g;
2134                         $title =~ s/$/&nbsp;/g;
2135                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2136                 }
2137         } else {
2138                 $cloud = \%ctags_lc;
2139         }
2140         $cloud;
2141 }
2142
2143 sub git_show_project_tagcloud {
2144         my ($cloud, $count) = @_;
2145         #print STDERR ref($cloud)."..\n";
2146         if (ref $cloud eq 'HTML::TagCloud') {
2147                 return $cloud->html_and_css($count);
2148         } else {
2149                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2150                 return '<p align="center">' . join (', ', map {
2151                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2152                 } splice(@tags, 0, $count)) . '</p>';
2153         }
2154 }
2155
2156 sub git_get_project_url_list {
2157         my $path = shift;
2158
2159         $git_dir = "$projectroot/$path";
2160         open my $fd, "$git_dir/cloneurl"
2161                 or return wantarray ?
2162                 @{ config_to_multi(git_get_project_config('url')) } :
2163                    config_to_multi(git_get_project_config('url'));
2164         my @git_project_url_list = map { chomp; $_ } <$fd>;
2165         close $fd;
2166
2167         return wantarray ? @git_project_url_list : \@git_project_url_list;
2168 }
2169
2170 sub git_get_projects_list {
2171         my ($filter) = @_;
2172         my @list;
2173
2174         $filter ||= '';
2175         $filter =~ s/\.git$//;
2176
2177         my $check_forks = gitweb_check_feature('forks');
2178
2179         if (-d $projects_list) {
2180                 # search in directory
2181                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2182                 # remove the trailing "/"
2183                 $dir =~ s!/+$!!;
2184                 my $pfxlen = length("$dir");
2185                 my $pfxdepth = ($dir =~ tr!/!!);
2186
2187                 File::Find::find({
2188                         follow_fast => 1, # follow symbolic links
2189                         follow_skip => 2, # ignore duplicates
2190                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2191                         wanted => sub {
2192                                 # skip project-list toplevel, if we get it.
2193                                 return if (m!^[/.]$!);
2194                                 # only directories can be git repositories
2195                                 return unless (-d $_);
2196                                 # don't traverse too deep (Find is super slow on os x)
2197                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2198                                         $File::Find::prune = 1;
2199                                         return;
2200                                 }
2201
2202                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2203                                 # we check related file in $projectroot
2204                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2205                                 if (check_export_ok("$projectroot/$path")) {
2206                                         push @list, { path => $path };
2207                                         $File::Find::prune = 1;
2208                                 }
2209                         },
2210                 }, "$dir");
2211
2212         } elsif (-f $projects_list) {
2213                 # read from file(url-encoded):
2214                 # 'git%2Fgit.git Linus+Torvalds'
2215                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2216                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2217                 my %paths;
2218                 open my ($fd), $projects_list or return;
2219         PROJECT:
2220                 while (my $line = <$fd>) {
2221                         chomp $line;
2222                         my ($path, $owner) = split ' ', $line;
2223                         $path = unescape($path);
2224                         $owner = unescape($owner);
2225                         if (!defined $path) {
2226                                 next;
2227                         }
2228                         if ($filter ne '') {
2229                                 # looking for forks;
2230                                 my $pfx = substr($path, 0, length($filter));
2231                                 if ($pfx ne $filter) {
2232                                         next PROJECT;
2233                                 }
2234                                 my $sfx = substr($path, length($filter));
2235                                 if ($sfx !~ /^\/.*\.git$/) {
2236                                         next PROJECT;
2237                                 }
2238                         } elsif ($check_forks) {
2239                         PATH:
2240                                 foreach my $filter (keys %paths) {
2241                                         # looking for forks;
2242                                         my $pfx = substr($path, 0, length($filter));
2243                                         if ($pfx ne $filter) {
2244                                                 next PATH;
2245                                         }
2246                                         my $sfx = substr($path, length($filter));
2247                                         if ($sfx !~ /^\/.*\.git$/) {
2248                                                 next PATH;
2249                                         }
2250                                         # is a fork, don't include it in
2251                                         # the list
2252                                         next PROJECT;
2253                                 }
2254                         }
2255                         if (check_export_ok("$projectroot/$path")) {
2256                                 my $pr = {
2257                                         path => $path,
2258                                         owner => to_utf8($owner),
2259                                 };
2260                                 push @list, $pr;
2261                                 (my $forks_path = $path) =~ s/\.git$//;
2262                                 $paths{$forks_path}++;
2263                         }
2264                 }
2265                 close $fd;
2266         }
2267         return @list;
2268 }
2269
2270 our $gitweb_project_owner = undef;
2271 sub git_get_project_list_from_file {
2272
2273         return if (defined $gitweb_project_owner);
2274
2275         $gitweb_project_owner = {};
2276         # read from file (url-encoded):
2277         # 'git%2Fgit.git Linus+Torvalds'
2278         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2279         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2280         if (-f $projects_list) {
2281                 open (my $fd , $projects_list);
2282                 while (my $line = <$fd>) {
2283                         chomp $line;
2284                         my ($pr, $ow) = split ' ', $line;
2285                         $pr = unescape($pr);
2286                         $ow = unescape($ow);
2287                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2288                 }
2289                 close $fd;
2290         }
2291 }
2292
2293 sub git_get_project_owner {
2294         my $project = shift;
2295         my $owner;
2296
2297         return undef unless $project;
2298         $git_dir = "$projectroot/$project";
2299
2300         if (!defined $gitweb_project_owner) {
2301                 git_get_project_list_from_file();
2302         }
2303
2304         if (exists $gitweb_project_owner->{$project}) {
2305                 $owner = $gitweb_project_owner->{$project};
2306         }
2307         if (!defined $owner){
2308                 $owner = git_get_project_config('owner');
2309         }
2310         if (!defined $owner) {
2311                 $owner = get_file_owner("$git_dir");
2312         }
2313
2314         return $owner;
2315 }
2316
2317 sub git_get_last_activity {
2318         my ($path) = @_;
2319         my $fd;
2320
2321         $git_dir = "$projectroot/$path";
2322         open($fd, "-|", git_cmd(), 'for-each-ref',
2323              '--format=%(committer)',
2324              '--sort=-committerdate',
2325              '--count=1',
2326              'refs/heads') or return;
2327         my $most_recent = <$fd>;
2328         close $fd or return;
2329         if (defined $most_recent &&
2330             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2331                 my $timestamp = $1;
2332                 my $age = time - $timestamp;
2333                 return ($age, age_string($age));
2334         }
2335         return (undef, undef);
2336 }
2337
2338 sub git_get_references {
2339         my $type = shift || "";
2340         my %refs;
2341         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2342         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2343         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2344                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2345                 or return;
2346
2347         while (my $line = <$fd>) {
2348                 chomp $line;
2349                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2350                         if (defined $refs{$1}) {
2351                                 push @{$refs{$1}}, $2;
2352                         } else {
2353                                 $refs{$1} = [ $2 ];
2354                         }
2355                 }
2356         }
2357         close $fd or return;
2358         return \%refs;
2359 }
2360
2361 sub git_get_rev_name_tags {
2362         my $hash = shift || return undef;
2363
2364         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2365                 or return;
2366         my $name_rev = <$fd>;
2367         close $fd;
2368
2369         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2370                 return $1;
2371         } else {
2372                 # catches also '$hash undefined' output
2373                 return undef;
2374         }
2375 }
2376
2377 ## ----------------------------------------------------------------------
2378 ## parse to hash functions
2379
2380 sub parse_date {
2381         my $epoch = shift;
2382         my $tz = shift || "-0000";
2383
2384         my %date;
2385         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2386         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2387         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2388         $date{'hour'} = $hour;
2389         $date{'minute'} = $min;
2390         $date{'mday'} = $mday;
2391         $date{'day'} = $days[$wday];
2392         $date{'month'} = $months[$mon];
2393         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2394                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2395         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2396                              $mday, $months[$mon], $hour ,$min;
2397         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2398                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2399
2400         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2401         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2402         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2403         $date{'hour_local'} = $hour;
2404         $date{'minute_local'} = $min;
2405         $date{'tz_local'} = $tz;
2406         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2407                                   1900+$year, $mon+1, $mday,
2408                                   $hour, $min, $sec, $tz);
2409         return %date;
2410 }
2411
2412 sub parse_tag {
2413         my $tag_id = shift;
2414         my %tag;
2415         my @comment;
2416
2417         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2418         $tag{'id'} = $tag_id;
2419         while (my $line = <$fd>) {
2420                 chomp $line;
2421                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2422                         $tag{'object'} = $1;
2423                 } elsif ($line =~ m/^type (.+)$/) {
2424                         $tag{'type'} = $1;
2425                 } elsif ($line =~ m/^tag (.+)$/) {
2426                         $tag{'name'} = $1;
2427                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2428                         $tag{'author'} = $1;
2429                         $tag{'epoch'} = $2;
2430                         $tag{'tz'} = $3;
2431                 } elsif ($line =~ m/--BEGIN/) {
2432                         push @comment, $line;
2433                         last;
2434                 } elsif ($line eq "") {
2435                         last;
2436                 }
2437         }
2438         push @comment, <$fd>;
2439         $tag{'comment'} = \@comment;
2440         close $fd or return;
2441         if (!defined $tag{'name'}) {
2442                 return
2443         };
2444         return %tag
2445 }
2446
2447 sub parse_commit_text {
2448         my ($commit_text, $withparents) = @_;
2449         my @commit_lines = split '\n', $commit_text;
2450         my %co;
2451
2452         pop @commit_lines; # Remove '\0'
2453
2454         if (! @commit_lines) {
2455                 return;
2456         }
2457
2458         my $header = shift @commit_lines;
2459         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2460                 return;
2461         }
2462         ($co{'id'}, my @parents) = split ' ', $header;
2463         while (my $line = shift @commit_lines) {
2464                 last if $line eq "\n";
2465                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2466                         $co{'tree'} = $1;
2467                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2468                         push @parents, $1;
2469                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2470                         $co{'author'} = $1;
2471                         $co{'author_epoch'} = $2;
2472                         $co{'author_tz'} = $3;
2473                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2474                                 $co{'author_name'}  = $1;
2475                                 $co{'author_email'} = $2;
2476                         } else {
2477                                 $co{'author_name'} = $co{'author'};
2478                         }
2479                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2480                         $co{'committer'} = $1;
2481                         $co{'committer_epoch'} = $2;
2482                         $co{'committer_tz'} = $3;
2483                         $co{'committer_name'} = $co{'committer'};
2484                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2485                                 $co{'committer_name'}  = $1;
2486                                 $co{'committer_email'} = $2;
2487                         } else {
2488                                 $co{'committer_name'} = $co{'committer'};
2489                         }
2490                 }
2491         }
2492         if (!defined $co{'tree'}) {
2493                 return;
2494         };
2495         $co{'parents'} = \@parents;
2496         $co{'parent'} = $parents[0];
2497
2498         foreach my $title (@commit_lines) {
2499                 $title =~ s/^    //;
2500                 if ($title ne "") {
2501                         $co{'title'} = chop_str($title, 80, 5);
2502                         # remove leading stuff of merges to make the interesting part visible
2503                         if (length($title) > 50) {
2504                                 $title =~ s/^Automatic //;
2505                                 $title =~ s/^merge (of|with) /Merge ... /i;
2506                                 if (length($title) > 50) {
2507                                         $title =~ s/(http|rsync):\/\///;
2508                                 }
2509                                 if (length($title) > 50) {
2510                                         $title =~ s/(master|www|rsync)\.//;
2511                                 }
2512                                 if (length($title) > 50) {
2513                                         $title =~ s/kernel.org:?//;
2514                                 }
2515                                 if (length($title) > 50) {
2516                                         $title =~ s/\/pub\/scm//;
2517                                 }
2518                         }
2519                         $co{'title_short'} = chop_str($title, 50, 5);
2520                         last;
2521                 }
2522         }
2523         if (! defined $co{'title'} || $co{'title'} eq "") {
2524                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2525         }
2526         # remove added spaces
2527         foreach my $line (@commit_lines) {
2528                 $line =~ s/^    //;
2529         }
2530         $co{'comment'} = \@commit_lines;
2531
2532         my $age = time - $co{'committer_epoch'};
2533         $co{'age'} = $age;
2534         $co{'age_string'} = age_string($age);
2535         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2536         if ($age > 60*60*24*7*2) {
2537                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2538                 $co{'age_string_age'} = $co{'age_string'};
2539         } else {
2540                 $co{'age_string_date'} = $co{'age_string'};
2541                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2542         }
2543         return %co;
2544 }
2545
2546 sub parse_commit {
2547         my ($commit_id) = @_;
2548         my %co;
2549
2550         local $/ = "\0";
2551
2552         open my $fd, "-|", git_cmd(), "rev-list",
2553                 "--parents",
2554                 "--header",
2555                 "--max-count=1",
2556                 $commit_id,
2557                 "--",
2558                 or die_error(500, "Open git-rev-list failed");
2559         %co = parse_commit_text(<$fd>, 1);
2560         close $fd;
2561
2562         return %co;
2563 }
2564
2565 sub parse_commits {
2566         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2567         my @cos;
2568
2569         $maxcount ||= 1;
2570         $skip ||= 0;
2571
2572         local $/ = "\0";
2573
2574         open my $fd, "-|", git_cmd(), "rev-list",
2575                 "--header",
2576                 @args,
2577                 ("--max-count=" . $maxcount),
2578                 ("--skip=" . $skip),
2579                 @extra_options,
2580                 $commit_id,
2581                 "--",
2582                 ($filename ? ($filename) : ())
2583                 or die_error(500, "Open git-rev-list failed");
2584         while (my $line = <$fd>) {
2585                 my %co = parse_commit_text($line);
2586                 push @cos, \%co;
2587         }
2588         close $fd;
2589
2590         return wantarray ? @cos : \@cos;
2591 }
2592
2593 # parse line of git-diff-tree "raw" output
2594 sub parse_difftree_raw_line {
2595         my $line = shift;
2596         my %res;
2597
2598         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2599         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2600         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2601                 $res{'from_mode'} = $1;
2602                 $res{'to_mode'} = $2;
2603                 $res{'from_id'} = $3;
2604                 $res{'to_id'} = $4;
2605                 $res{'status'} = $5;
2606                 $res{'similarity'} = $6;
2607                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2608                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2609                 } else {
2610                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2611                 }
2612         }
2613         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2614         # combined diff (for merge commit)
2615         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2616                 $res{'nparents'}  = length($1);
2617                 $res{'from_mode'} = [ split(' ', $2) ];
2618                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2619                 $res{'from_id'} = [ split(' ', $3) ];
2620                 $res{'to_id'} = pop @{$res{'from_id'}};
2621                 $res{'status'} = [ split('', $4) ];
2622                 $res{'to_file'} = unquote($5);
2623         }
2624         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2625         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2626                 $res{'commit'} = $1;
2627         }
2628
2629         return wantarray ? %res : \%res;
2630 }
2631
2632 # wrapper: return parsed line of git-diff-tree "raw" output
2633 # (the argument might be raw line, or parsed info)
2634 sub parsed_difftree_line {
2635         my $line_or_ref = shift;
2636
2637         if (ref($line_or_ref) eq "HASH") {
2638                 # pre-parsed (or generated by hand)
2639                 return $line_or_ref;
2640         } else {
2641                 return parse_difftree_raw_line($line_or_ref);
2642         }
2643 }
2644
2645 # parse line of git-ls-tree output
2646 sub parse_ls_tree_line ($;%) {
2647         my $line = shift;
2648         my %opts = @_;
2649         my %res;
2650
2651         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2652         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2653
2654         $res{'mode'} = $1;
2655         $res{'type'} = $2;
2656         $res{'hash'} = $3;
2657         if ($opts{'-z'}) {
2658                 $res{'name'} = $4;
2659         } else {
2660                 $res{'name'} = unquote($4);
2661         }
2662
2663         return wantarray ? %res : \%res;
2664 }
2665
2666 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2667 sub parse_from_to_diffinfo {
2668         my ($diffinfo, $from, $to, @parents) = @_;
2669
2670         if ($diffinfo->{'nparents'}) {
2671                 # combined diff
2672                 $from->{'file'} = [];
2673                 $from->{'href'} = [];
2674                 fill_from_file_info($diffinfo, @parents)
2675                         unless exists $diffinfo->{'from_file'};
2676                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2677                         $from->{'file'}[$i] =
2678                                 defined $diffinfo->{'from_file'}[$i] ?
2679                                         $diffinfo->{'from_file'}[$i] :
2680                                         $diffinfo->{'to_file'};
2681                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2682                                 $from->{'href'}[$i] = href(action=>"blob",
2683                                                            hash_base=>$parents[$i],
2684                                                            hash=>$diffinfo->{'from_id'}[$i],
2685                                                            file_name=>$from->{'file'}[$i]);
2686                         } else {
2687                                 $from->{'href'}[$i] = undef;
2688                         }
2689                 }
2690         } else {
2691                 # ordinary (not combined) diff
2692                 $from->{'file'} = $diffinfo->{'from_file'};
2693                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2694                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2695                                                hash=>$diffinfo->{'from_id'},
2696                                                file_name=>$from->{'file'});
2697                 } else {
2698                         delete $from->{'href'};
2699                 }
2700         }
2701
2702         $to->{'file'} = $diffinfo->{'to_file'};
2703         if (!is_deleted($diffinfo)) { # file exists in result
2704                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2705                                      hash=>$diffinfo->{'to_id'},
2706                                      file_name=>$to->{'file'});
2707         } else {
2708                 delete $to->{'href'};
2709         }
2710 }
2711
2712 ## ......................................................................
2713 ## parse to array of hashes functions
2714
2715 sub git_get_heads_list {
2716         my $limit = shift;
2717         my @headslist;
2718
2719         open my $fd, '-|', git_cmd(), 'for-each-ref',
2720                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2721                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2722                 'refs/heads'
2723                 or return;
2724         while (my $line = <$fd>) {
2725                 my %ref_item;
2726
2727                 chomp $line;
2728                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2729                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2730                 my ($committer, $epoch, $tz) =
2731                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2732                 $ref_item{'fullname'}  = $name;
2733                 $name =~ s!^refs/heads/!!;
2734
2735                 $ref_item{'name'}  = $name;
2736                 $ref_item{'id'}    = $hash;
2737                 $ref_item{'title'} = $title || '(no commit message)';
2738                 $ref_item{'epoch'} = $epoch;
2739                 if ($epoch) {
2740                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2741                 } else {
2742                         $ref_item{'age'} = "unknown";
2743                 }
2744
2745                 push @headslist, \%ref_item;
2746         }
2747         close $fd;
2748
2749         return wantarray ? @headslist : \@headslist;
2750 }
2751
2752 sub git_get_tags_list {
2753         my $limit = shift;
2754         my @tagslist;
2755
2756         open my $fd, '-|', git_cmd(), 'for-each-ref',
2757                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2758                 '--format=%(objectname) %(objecttype) %(refname) '.
2759                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2760                 'refs/tags'
2761                 or return;
2762         while (my $line = <$fd>) {
2763                 my %ref_item;
2764
2765                 chomp $line;
2766                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2767                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2768                 my ($creator, $epoch, $tz) =
2769                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2770                 $ref_item{'fullname'} = $name;
2771                 $name =~ s!^refs/tags/!!;
2772
2773                 $ref_item{'type'} = $type;
2774                 $ref_item{'id'} = $id;
2775                 $ref_item{'name'} = $name;
2776                 if ($type eq "tag") {
2777                         $ref_item{'subject'} = $title;
2778                         $ref_item{'reftype'} = $reftype;
2779                         $ref_item{'refid'}   = $refid;
2780                 } else {
2781                         $ref_item{'reftype'} = $type;
2782                         $ref_item{'refid'}   = $id;
2783                 }
2784
2785                 if ($type eq "tag" || $type eq "commit") {
2786                         $ref_item{'epoch'} = $epoch;
2787                         if ($epoch) {
2788                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2789                         } else {
2790                                 $ref_item{'age'} = "unknown";
2791                         }
2792                 }
2793
2794                 push @tagslist, \%ref_item;
2795         }
2796         close $fd;
2797
2798         return wantarray ? @tagslist : \@tagslist;
2799 }
2800
2801 ## ----------------------------------------------------------------------
2802 ## filesystem-related functions
2803
2804 sub get_file_owner {
2805         my $path = shift;
2806
2807         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2808         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2809         if (!defined $gcos) {
2810                 return undef;
2811         }
2812         my $owner = $gcos;
2813         $owner =~ s/[,;].*$//;
2814         return to_utf8($owner);
2815 }
2816
2817 # assume that file exists
2818 sub insert_file {
2819         my $filename = shift;
2820
2821         open my $fd, '<', $filename;
2822         return join '', map to_utf8($_), <$fd>;
2823 }
2824
2825 ## ......................................................................
2826 ## mimetype related functions
2827
2828 sub mimetype_guess_file {
2829         my $filename = shift;
2830         my $mimemap = shift;
2831         -r $mimemap or return undef;
2832
2833         my %mimemap;
2834         open(MIME, $mimemap) or return undef;
2835         while (<MIME>) {
2836                 next if m/^#/; # skip comments
2837                 my ($mime, $exts) = split(/\t+/);
2838                 if (defined $exts) {
2839                         my @exts = split(/\s+/, $exts);
2840                         foreach my $ext (@exts) {
2841                                 $mimemap{$ext} = $mime;
2842                         }
2843                 }
2844         }
2845         close(MIME);
2846
2847         $filename =~ /\.([^.]*)$/;
2848         return $mimemap{$1};
2849 }
2850
2851 sub mimetype_guess {
2852         my $filename = shift;
2853         my $mime;
2854         $filename =~ /\./ or return undef;
2855
2856         if ($mimetypes_file) {
2857                 my $file = $mimetypes_file;
2858                 if ($file !~ m!^/!) { # if it is relative path
2859                         # it is relative to project
2860                         $file = "$projectroot/$project/$file";
2861                 }
2862                 $mime = mimetype_guess_file($filename, $file);
2863         }
2864         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2865         return $mime;
2866 }
2867
2868 sub blob_mimetype {
2869         my $fd = shift;
2870         my $filename = shift;
2871
2872         if ($filename) {
2873                 my $mime = mimetype_guess($filename);
2874                 $mime and return $mime;
2875         }
2876
2877         # just in case
2878         return $default_blob_plain_mimetype unless $fd;
2879
2880         if (-T $fd) {
2881                 return 'text/plain';
2882         } elsif (! $filename) {
2883                 return 'application/octet-stream';
2884         } elsif ($filename =~ m/\.png$/i) {
2885                 return 'image/png';
2886         } elsif ($filename =~ m/\.gif$/i) {
2887                 return 'image/gif';
2888         } elsif ($filename =~ m/\.jpe?g$/i) {
2889                 return 'image/jpeg';
2890         } else {
2891                 return 'application/octet-stream';
2892         }
2893 }
2894
2895 sub blob_contenttype {
2896         my ($fd, $file_name, $type) = @_;
2897
2898         $type ||= blob_mimetype($fd, $file_name);
2899         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2900                 $type .= "; charset=$default_text_plain_charset";
2901         }
2902
2903         return $type;
2904 }
2905
2906 ## ======================================================================
2907 ## functions printing HTML: header, footer, error page
2908
2909 sub git_header_html {
2910         # XXX These aren't used, how odd.
2911         my $status = shift || "200 OK";
2912         my $expires = shift;
2913
2914         my $title = "$site_name";
2915         if (defined $project) {
2916                 $title .= " - " . to_utf8($project);
2917                 if (defined $action) {
2918                         $title .= "/$action";
2919                         if (defined $file_name) {
2920                                 $title .= " - " . esc_path($file_name);
2921                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2922                                         $title .= "/";
2923                                 }
2924                         }
2925                 }
2926         }
2927
2928         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2929
2930         $c->stash->{version} = $version;
2931         $c->stash->{git_version} = $git_version;
2932         $c->stash->{mod_perl_version} = $mod_perl_version;
2933         $c->stash->{title} = $title;
2934
2935         # the stylesheet, favicon etc urls won't work correctly with path_info
2936         # unless we set the appropriate base URL
2937         $c->stash->{baseurl} = $ENV{PATH_INFO}
2938                                                  ? q[<base href="].esc_url($base_url).q[" />]
2939                                                  : '';
2940
2941         # print out each stylesheet that exist, providing backwards capability
2942         # for those people who defined $stylesheet in a config file
2943         my $ssfmt = q[<link rel="stylesheet" type="text/css" href="%s"/>];
2944         $c->stash->{stylesheets} = [defined $stylesheet
2945                 ? sprintf($ssfmt, $stylesheet)
2946                 : map(sprintf($ssfmt, $_), grep $_, @stylesheets)
2947         ];
2948
2949         $c->stash->{project} = defined $project;
2950         if (defined $project) {
2951                 my %href_params = get_feed_info();
2952                 if (!exists $href_params{'-title'}) {
2953                         $href_params{'-title'} = 'log';
2954                 }
2955
2956                 foreach my $format qw(RSS Atom) {
2957                         my $type = lc($format);
2958                         my %link_attr = (
2959                                 '-rel' => 'alternate',
2960                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2961                                 '-type' => "application/$type+xml"
2962                         );
2963
2964                         $href_params{'action'} = $type;
2965                         $link_attr{'-href'} = href(%href_params);
2966                         $c->stash->{lc $format.'_link'} = "<link ".
2967                               "rel=\"$link_attr{'-rel'}\" ".
2968                               "title=\"$link_attr{'-title'}\" ".
2969                               "href=\"$link_attr{'-href'}\" ".
2970                               "type=\"$link_attr{'-type'}\" ".
2971                               "/>\n";
2972
2973                         $href_params{'extra_options'} = '--no-merges';
2974                         $link_attr{'-href'} = href(%href_params);
2975                         $link_attr{'-title'} .= ' (no merges)';
2976                         $c->stash->{lc $format.'_link_no_merges'} = "<link ".
2977                               "rel=\"$link_attr{'-rel'}\" ".
2978                               "title=\"$link_attr{'-title'}\" ".
2979                               "href=\"$link_attr{'-href'}\" ".
2980                               "type=\"$link_attr{'-type'}\" ".
2981                               "/>\n";
2982                 }
2983
2984         } else {
2985                 $c->stash->{projects_list} = sprintf('<link rel="alternate" title="%s projects list" '.
2986                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2987                        $site_name, href(project=>undef, action=>"project_index"));
2988                 $c->stash->{projects_feed} = sprintf('<link rel="alternate" title="%s projects feeds" '.
2989                        'href="%s" type="text/x-opml" />'."\n",
2990                        $site_name, href(project=>undef, action=>"opml"));
2991         }
2992
2993         $c->stash->{favicon} = defined $favicon
2994                 ? qq(<link rel="shortcut icon" href="$favicon" type="image/png" />)
2995                 : '';
2996
2997         # </head><body>
2998
2999         $c->stash->{site_header} = -f $site_header
3000                 ? insert_file($site_header)
3001                 : '';
3002
3003         $c->stash->{logo}
3004                 = $cgi->a({-href => esc_url($logo_url),
3005                                    -title => $logo_label},
3006                                    qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3007         $c->stash->{home_link} =  $cgi->a({-href => esc_url($home_link)}, $home_link_str);
3008
3009         if(defined $project) {
3010                 $c->stash->{summary} = $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3011                 $c->stash->{action}  = $action;
3012         }
3013
3014         my $have_search = $c->stash->{have_search} = gitweb_check_feature('search');
3015         if (defined $project && $have_search) {
3016                 if (!defined $searchtext) {
3017                         $searchtext = "";
3018                 }
3019                 my $search_hash;
3020                 if (defined $hash_base) {
3021                         $search_hash = $hash_base;
3022                 } elsif (defined $hash) {
3023                         $search_hash = $hash;
3024                 } else {
3025                         $search_hash = "HEAD";
3026                 }
3027                 my $action = $my_uri;
3028                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3029                 if ($use_pathinfo) {
3030                         $action .= "/".esc_url($project);
3031                 }
3032                 # This could be done better, but meh.
3033                 $c->stash->{search_form} = $cgi->startform(-method => "get", -action => $action) .
3034                       (!$use_pathinfo &&
3035                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3036                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3037                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3038                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3039                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3040                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3041                       " search:\n".
3042                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3043                       "<span title=\"Extended regular expression\">" .
3044                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3045                                      -checked => $search_use_regexp) .
3046                       "</span>" .
3047                       $cgi->end_form() . "\n";
3048         }
3049 }
3050
3051 sub git_footer_html {
3052         my $feed_class = 'rss_logo';
3053
3054         if (defined $project) {
3055                 my $descr = git_get_project_description($project);
3056                 $c->stash->{project_description} = defined $descr
3057                         ? esc_html($descr)
3058                         : '';
3059
3060                 my %href_params = get_feed_info();
3061                 if (!%href_params) {
3062                         $feed_class .= ' generic';
3063                 }
3064                 $href_params{'-title'} ||= 'log';
3065
3066                 foreach my $format qw(RSS Atom) {
3067                         $href_params{'action'} = lc($format);
3068                         $c->stash->{lc $format.'_feed'} = $cgi->a({-href => href(%href_params),
3069                                       -title => "$href_params{'-title'} $format feed",
3070                                       -class => $feed_class}, $format);
3071                 }
3072
3073         } else {
3074                 $c->stash->{opml_feed} = $cgi->a({-href => href(project=>undef, action=>"opml"),
3075                               -class => $feed_class}, "OPML");
3076                 $c->stash->{index_feed} = $cgi->a({-href => href(project=>undef, action=>"project_index"),
3077                               -class => $feed_class}, "TXT");
3078         }
3079
3080         $c->stash->{site_footer} = -f $site_footer
3081                 ? insert_file($site_footer)
3082                 : '';
3083 }
3084
3085 # die_error(<http_status_code>, <error_message>)
3086 # Example: die_error(404, 'Hash not found')
3087 # By convention, use the following status codes (as defined in RFC 2616):
3088 # 400: Invalid or missing CGI parameters, or
3089 #      requested object exists but has wrong type.
3090 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3091 #      this server or project.
3092 # 404: Requested object/revision/project doesn't exist.
3093 # 500: The server isn't configured properly, or
3094 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3095 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3096 sub die_error {
3097         my $status = shift || 500;
3098         my $error = shift || "Internal server error";
3099
3100         my %http_responses = (400 => '400 Bad Request',
3101                               403 => '403 Forbidden',
3102                               404 => '404 Not Found',
3103                               500 => '500 Internal Server Error');
3104         $c->response->status($http_responses{$status});
3105
3106         $c->stash->{content} = <<EOF;
3107         <div class="page_body">
3108         <br /><br />
3109         $status - $error
3110         <br />
3111         </div>
3112 EOF
3113         die bless {};
3114 }
3115
3116 ## ----------------------------------------------------------------------
3117 ## functions printing or outputting HTML: navigation
3118
3119 sub git_print_page_nav {
3120         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3121         $extra = '' if !defined $extra; # pager or formats
3122
3123         my @navs = qw(summary shortlog log commit commitdiff tree);
3124         if ($suppress) {
3125                 @navs = grep { $_ ne $suppress } @navs;
3126         }
3127
3128         my %arg = map { $_ => {action=>$_} } @navs;
3129         if (defined $head) {
3130                 for (qw(commit commitdiff)) {
3131                         $arg{$_}{'hash'} = $head;
3132                 }
3133                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3134                         for (qw(shortlog log)) {
3135                                 $arg{$_}{'hash'} = $head;
3136                         }
3137                 }
3138         }
3139
3140         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3141         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3142
3143         my @actions = gitweb_get_feature('actions');
3144         my %repl = (
3145                 '%' => '%',
3146                 'n' => $project,         # project name
3147                 'f' => $git_dir,         # project path within filesystem
3148                 'h' => $treehead || '',  # current hash ('h' parameter)
3149                 'b' => $treebase || '',  # hash base ('hb' parameter)
3150         );
3151         while (@actions) {
3152                 my ($label, $link, $pos) = splice(@actions,0,3);
3153                 # insert
3154                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3155                 # munch munch
3156                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3157                 $arg{$label}{'_href'} = $link;
3158         }
3159
3160         $c->stash->{page_nav} = 1;
3161         $c->stash->{nav_links} =
3162                 (join " | ",
3163                  map { $_ eq $current ?
3164                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3165                  } @navs);
3166         $c->stash->{extra} = $extra;
3167 }
3168
3169 sub format_paging_nav {
3170         my ($action, $hash, $head, $page, $has_next_link) = @_;
3171         my $paging_nav;
3172
3173
3174         if ($hash ne $head || $page) {
3175                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3176         } else {
3177                 $paging_nav .= "HEAD";
3178         }
3179
3180         if ($page > 0) {
3181                 $paging_nav .= " &sdot; " .
3182                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3183                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3184         } else {
3185                 $paging_nav .= " &sdot; prev";
3186         }
3187
3188         if ($has_next_link) {
3189                 $paging_nav .= " &sdot; " .
3190                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3191                                  -accesskey => "n", -title => "Alt-n"}, "next");
3192         } else {
3193                 $paging_nav .= " &sdot; next";
3194         }
3195
3196         return $paging_nav;
3197 }
3198
3199 ## ......................................................................
3200 ## functions printing or outputting HTML: div
3201
3202 sub git_print_header_div {
3203         my ($action, $title, $hash, $hash_base) = @_;
3204         my %args = ();
3205
3206         $args{'action'} = $action;
3207         $args{'hash'} = $hash if $hash;
3208         $args{'hash_base'} = $hash_base if $hash_base;
3209
3210     print q[<div class="header">],
3211               $cgi->a({-href => href(%args), -class => "title"},
3212               $title ? $title : $action),
3213                   q[</div>];
3214 }
3215
3216 sub git_print_authorship {
3217         my $co = shift;
3218
3219         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3220         print "<div class=\"author_date\">" .
3221               esc_html($co->{'author_name'}) .
3222               " [$ad{'rfc2822'}";
3223         if ($ad{'hour_local'} < 6) {
3224                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3225                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3226         } else {
3227                 printf(" (%02d:%02d %s)",
3228                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3229         }
3230         print "]</div>\n";
3231 }
3232
3233 sub git_print_page_path {
3234         my $name = shift;
3235         my $type = shift;
3236         my $hb = shift;
3237
3238
3239         print "<div class=\"page_path\">";
3240         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3241                       -title => 'tree root'}, to_utf8("[$project]"));
3242         print " / ";
3243         if (defined $name) {
3244                 my @dirname = split '/', $name;
3245                 my $basename = pop @dirname;
3246                 my $fullname = '';
3247
3248                 foreach my $dir (@dirname) {
3249                         $fullname .= ($fullname ? '/' : '') . $dir;
3250                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3251                                                      hash_base=>$hb),
3252                                       -title => $fullname}, esc_path($dir));
3253                         print " / ";
3254                 }
3255                 if (defined $type && $type eq 'blob') {
3256                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3257                                                      hash_base=>$hb),
3258                                       -title => $name}, esc_path($basename));
3259                 } elsif (defined $type && $type eq 'tree') {
3260                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3261                                                      hash_base=>$hb),
3262                                       -title => $name}, esc_path($basename));
3263                         print " / ";
3264                 } else {
3265                         print esc_path($basename);
3266                 }
3267         }
3268         print "<br/></div>\n";
3269 }
3270
3271 # sub git_print_log (\@;%) {
3272 sub git_print_log ($;%) {
3273         my $log = shift;
3274         my %opts = @_;
3275
3276         if ($opts{'-remove_title'}) {
3277                 # remove title, i.e. first line of log
3278                 shift @$log;
3279         }
3280         # remove leading empty lines
3281         while (defined $log->[0] && $log->[0] eq "") {
3282                 shift @$log;
3283         }
3284
3285         # print log
3286         my $signoff = 0;
3287         my $empty = 0;
3288         foreach my $line (@$log) {
3289                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3290                         $signoff = 1;
3291                         $empty = 0;
3292                         if (! $opts{'-remove_signoff'}) {
3293                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3294                                 next;
3295                         } else {
3296                                 # remove signoff lines
3297                                 next;
3298                         }
3299                 } else {
3300                         $signoff = 0;
3301                 }
3302
3303                 # print only one empty line
3304                 # do not print empty line after signoff
3305                 if ($line eq "") {
3306                         next if ($empty || $signoff);
3307                         $empty = 1;
3308                 } else {
3309                         $empty = 0;
3310                 }
3311
3312                 print format_log_line_html($line) . "<br/>\n";
3313         }
3314
3315         if ($opts{'-final_empty_line'}) {
3316                 # end with single empty line
3317                 print "<br/>\n" unless $empty;
3318         }
3319 }
3320
3321 # return link target (what link points to)
3322 sub git_get_link_target {
3323         my $hash = shift;
3324         my $link_target;
3325
3326         # read link
3327         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3328                 or return;
3329         {
3330                 local $/;
3331                 $link_target = <$fd>;
3332         }
3333         close $fd
3334                 or return;
3335
3336         return $link_target;
3337 }
3338
3339 # given link target, and the directory (basedir) the link is in,
3340 # return target of link relative to top directory (top tree);
3341 # return undef if it is not possible (including absolute links).
3342 sub normalize_link_target {
3343         my ($link_target, $basedir, $hash_base) = @_;
3344
3345         # we can normalize symlink target only if $hash_base is provided
3346         return unless $hash_base;
3347
3348         # absolute symlinks (beginning with '/') cannot be normalized
3349         return if (substr($link_target, 0, 1) eq '/');
3350
3351         # normalize link target to path from top (root) tree (dir)
3352         my $path;
3353         if ($basedir) {
3354                 $path = $basedir . '/' . $link_target;
3355         } else {
3356                 # we are in top (root) tree (dir)
3357                 $path = $link_target;
3358         }
3359
3360         # remove //, /./, and /../
3361         my @path_parts;
3362         foreach my $part (split('/', $path)) {
3363                 # discard '.' and ''
3364                 next if (!$part || $part eq '.');
3365                 # handle '..'
3366                 if ($part eq '..') {
3367                         if (@path_parts) {
3368                                 pop @path_parts;
3369                         } else {
3370                                 # link leads outside repository (outside top dir)
3371                                 return;
3372                         }
3373                 } else {
3374                         push @path_parts, $part;
3375                 }
3376         }
3377         $path = join('/', @path_parts);
3378
3379         return $path;
3380 }
3381
3382 # print tree entry (row of git_tree), but without encompassing <tr> element
3383 sub git_print_tree_entry {
3384         my ($t, $basedir, $hash_base, $have_blame) = @_;
3385
3386         my %base_key = ();
3387         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3388
3389         # The format of a table row is: mode list link.  Where mode is
3390         # the mode of the entry, list is the name of the entry, an href,
3391         # and link is the action links of the entry.
3392
3393         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3394         if ($t->{'type'} eq "blob") {
3395                 print "<td class=\"list\">" .
3396                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3397                                                file_name=>"$basedir$t->{'name'}", %base_key),
3398                                 -class => "list"}, esc_path($t->{'name'}));
3399                 if (S_ISLNK(oct $t->{'mode'})) {
3400                         my $link_target = git_get_link_target($t->{'hash'});
3401                         if ($link_target) {
3402                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3403                                 if (defined $norm_target) {
3404                                         print " -> " .
3405                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3406                                                                      file_name=>$norm_target),
3407                                                        -title => $norm_target}, esc_path($link_target));
3408                                 } else {
3409                                         print " -> " . esc_path($link_target);
3410                                 }
3411                         }
3412                 }
3413                 print "</td>\n";
3414                 print "<td class=\"link\">";
3415                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3416                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3417                               "blob");
3418                 if ($have_blame) {
3419                         print " | " .
3420                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3421                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3422                                       "blame");
3423                 }
3424                 if (defined $hash_base) {
3425                         print " | " .
3426                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3427                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3428                                       "history");
3429                 }
3430                 print " | " .
3431                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3432                                                file_name=>"$basedir$t->{'name'}")},
3433                                 "raw");
3434                 print "</td>\n";
3435
3436         } elsif ($t->{'type'} eq "tree") {
3437                 print "<td class=\"list\">";
3438                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3439                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3440                               esc_path($t->{'name'}));
3441                 print "</td>\n";
3442                 print "<td class=\"link\">";
3443                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3444                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3445                               "tree");
3446                 if (defined $hash_base) {
3447                         print " | " .
3448                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3449                                                      file_name=>"$basedir$t->{'name'}")},
3450                                       "history");
3451                 }
3452                 print "</td>\n";
3453         } else {
3454                 # unknown object: we can only present history for it
3455                 # (this includes 'commit' object, i.e. submodule support)
3456                 print "<td class=\"list\">" .
3457                       esc_path($t->{'name'}) .
3458                       "</td>\n";
3459                 print "<td class=\"link\">";
3460                 if (defined $hash_base) {
3461                         print $cgi->a({-href => href(action=>"history",
3462                                                      hash_base=>$hash_base,
3463                                                      file_name=>"$basedir$t->{'name'}")},
3464                                       "history");
3465                 }
3466                 print "</td>\n";
3467         }
3468 }
3469
3470 ## ......................................................................
3471 ## functions printing large fragments of HTML
3472
3473 # get pre-image filenames for merge (combined) diff
3474 sub fill_from_file_info {
3475         my ($diff, @parents) = @_;
3476
3477         $diff->{'from_file'} = [ ];
3478         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3479         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3480                 if ($diff->{'status'}[$i] eq 'R' ||
3481                     $diff->{'status'}[$i] eq 'C') {
3482                         $diff->{'from_file'}[$i] =
3483                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3484                 }
3485         }
3486
3487         return $diff;
3488 }
3489
3490 # is current raw difftree line of file deletion
3491 sub is_deleted {
3492         my $diffinfo = shift;
3493
3494         return $diffinfo->{'to_id'} eq ('0' x 40);
3495 }
3496
3497 # does patch correspond to [previous] difftree raw line
3498 # $diffinfo  - hashref of parsed raw diff format
3499 # $patchinfo - hashref of parsed patch diff format
3500 #              (the same keys as in $diffinfo)
3501 sub is_patch_split {
3502         my ($diffinfo, $patchinfo) = @_;
3503
3504         return defined $diffinfo && defined $patchinfo
3505                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3506 }
3507
3508
3509 sub git_difftree_body {
3510         my ($difftree, $hash, @parents) = @_;
3511         my ($parent) = $parents[0];
3512         my $have_blame = gitweb_check_feature('blame');
3513         print "<div class=\"list_head\">\n";
3514         if ($#{$difftree} > 10) {
3515                 print(($#{$difftree} + 1) . " files changed:\n");
3516         }
3517         print "</div>\n";
3518
3519         print "<table class=\"" .
3520               (@parents > 1 ? "combined " : "") .
3521               "diff_tree\">\n";
3522
3523         # header only for combined diff in 'commitdiff' view
3524         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3525         if ($has_header) {
3526                 # table header
3527                 print "<thead><tr>\n" .
3528                        "<th></th><th></th>\n"; # filename, patchN link
3529                 for (my $i = 0; $i < @parents; $i++) {
3530                         my $par = $parents[$i];
3531                         print "<th>" .
3532                               $cgi->a({-href => href(action=>"commitdiff",
3533                                                      hash=>$hash, hash_parent=>$par),
3534                                        -title => 'commitdiff to parent number ' .
3535                                                   ($i+1) . ': ' . substr($par,0,7)},
3536                                       $i+1) .
3537                               "&nbsp;</th>\n";
3538                 }
3539                 print "</tr></thead>\n<tbody>\n";
3540         }
3541
3542         my $alternate = 1;
3543         my $patchno = 0;
3544         foreach my $line (@{$difftree}) {
3545                 my $diff = parsed_difftree_line($line);
3546
3547                 if ($alternate) {
3548                         print "<tr class=\"dark\">\n";
3549                 } else {
3550                         print "<tr class=\"light\">\n";
3551                 }
3552                 $alternate ^= 1;
3553
3554                 if (exists $diff->{'nparents'}) { # combined diff
3555
3556                         fill_from_file_info($diff, @parents)
3557                                 unless exists $diff->{'from_file'};
3558
3559                         if (!is_deleted($diff)) {
3560                                 # file exists in the result (child) commit
3561                                 print "<td>" .
3562                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3563                                                              file_name=>$diff->{'to_file'},
3564                                                              hash_base=>$hash),
3565                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3566                                       "</td>\n";
3567                         } else {
3568                                 print "<td>" .
3569                                       esc_path($diff->{'to_file'}) .
3570                                       "</td>\n";
3571                         }
3572
3573                         if ($action eq 'commitdiff') {
3574                                 # link to patch
3575                                 $patchno++;
3576                                 print "<td class=\"link\">" .
3577                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3578                                       " | " .
3579                                       "</td>\n";
3580                         }
3581
3582                         my $has_history = 0;
3583                         my $not_deleted = 0;
3584                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3585                                 my $hash_parent = $parents[$i];
3586                                 my $from_hash = $diff->{'from_id'}[$i];
3587                                 my $from_path = $diff->{'from_file'}[$i];
3588                                 my $status = $diff->{'status'}[$i];
3589
3590                                 $has_history ||= ($status ne 'A');
3591                                 $not_deleted ||= ($status ne 'D');
3592
3593                                 if ($status eq 'A') {
3594                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3595                                 } elsif ($status eq 'D') {
3596                                         print "<td class=\"link\">" .
3597                                               $cgi->a({-href => href(action=>"blob",
3598                                                                      hash_base=>$hash,
3599                                                                      hash=>$from_hash,
3600                                                                      file_name=>$from_path)},
3601                                                       "blob" . ($i+1)) .
3602                                               " | </td>\n";
3603                                 } else {
3604                                         if ($diff->{'to_id'} eq $from_hash) {
3605                                                 print "<td class=\"link nochange\">";
3606                                         } else {
3607                                                 print "<td class=\"link\">";
3608                                         }
3609                                         print $cgi->a({-href => href(action=>"blobdiff",
3610                                                                      hash=>$diff->{'to_id'},
3611                                                                      hash_parent=>$from_hash,
3612                                                                      hash_base=>$hash,
3613                                                                      hash_parent_base=>$hash_parent,
3614                                                                      file_name=>$diff->{'to_file'},
3615                                                                      file_parent=>$from_path)},
3616                                                       "diff" . ($i+1)) .
3617                                               " | </td>\n";
3618                                 }
3619                         }
3620
3621                         print "<td class=\"link\">";
3622                         if ($not_deleted) {
3623                                 print $cgi->a({-href => href(action=>"blob",
3624                                                              hash=>$diff->{'to_id'},
3625                                                              file_name=>$diff->{'to_file'},
3626                                                              hash_base=>$hash)},
3627                                               "blob");
3628                                 print " | " if ($has_history);
3629                         }
3630                         if ($has_history) {
3631                                 print $cgi->a({-href => href(action=>"history",
3632                                                              file_name=>$diff->{'to_file'},
3633                                                              hash_base=>$hash)},
3634                                               "history");
3635                         }
3636                         print "</td>\n";
3637
3638                         print "</tr>\n";
3639                         next; # instead of 'else' clause, to avoid extra indent
3640                 }
3641                 # else ordinary diff
3642
3643                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3644                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3645                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3646                         $to_mode_oct = oct $diff->{'to_mode'};
3647                         if (S_ISREG($to_mode_oct)) { # only for regular file
3648                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3649                         }
3650                         $to_file_type = file_type($diff->{'to_mode'});
3651                 }
3652                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3653                         $from_mode_oct = oct $diff->{'from_mode'};
3654                         if (S_ISREG($to_mode_oct)) { # only for regular file
3655                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3656                         }
3657                         $from_file_type = file_type($diff->{'from_mode'});
3658                 }
3659
3660                 if ($diff->{'status'} eq "A") { # created
3661                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3662                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3663                         $mode_chng   .= "]</span>";
3664                         print "<td>";
3665                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3666                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3667                                       -class => "list"}, esc_path($diff->{'file'}));
3668                         print "</td>\n";
3669                         print "<td>$mode_chng</td>\n";
3670                         print "<td class=\"link\">";
3671                         if ($action eq 'commitdiff') {
3672                                 # link to patch
3673                                 $patchno++;
3674                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3675                                 print " | ";
3676                         }
3677                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3678                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3679                                       "blob");
3680                         print "</td>\n";
3681
3682                 } elsif ($diff->{'status'} eq "D") { # deleted
3683                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3684                         print "<td>";
3685                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3686                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3687                                        -class => "list"}, esc_path($diff->{'file'}));
3688                         print "</td>\n";
3689                         print "<td>$mode_chng</td>\n";
3690                         print "<td class=\"link\">";
3691                         if ($action eq 'commitdiff') {
3692                                 # link to patch
3693                                 $patchno++;
3694                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3695                                 print " | ";
3696                         }
3697                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3698                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3699                                       "blob") . " | ";
3700                         if ($have_blame) {
3701                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3702                                                              file_name=>$diff->{'file'})},
3703                                               "blame") . " | ";
3704                         }
3705                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3706                                                      file_name=>$diff->{'file'})},
3707                                       "history");
3708                         print "</td>\n";
3709
3710                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3711                         my $mode_chnge = "";
3712                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3713                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3714                                 if ($from_file_type ne $to_file_type) {
3715                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3716                                 }
3717                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3718                                         if ($from_mode_str && $to_mode_str) {
3719                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3720                                         } elsif ($to_mode_str) {
3721                                                 $mode_chnge .= " mode: $to_mode_str";
3722                                         }
3723                                 }
3724                                 $mode_chnge .= "]</span>\n";
3725                         }
3726                         print "<td>";
3727                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3728                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3729                                       -class => "list"}, esc_path($diff->{'file'}));
3730                         print "</td>\n";
3731                         print "<td>$mode_chnge</td>\n";
3732                         print "<td class=\"link\">";
3733                         if ($action eq 'commitdiff') {
3734                                 # link to patch
3735                                 $patchno++;
3736                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3737                                       " | ";
3738                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3739                                 # "commit" view and modified file (not onlu mode changed)
3740                                 print $cgi->a({-href => href(action=>"blobdiff",
3741                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3742                                                              hash_base=>$hash, hash_parent_base=>$parent,
3743                                                              file_name=>$diff->{'file'})},
3744                                               "diff") .
3745                                       " | ";
3746                         }
3747                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3748                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3749                                        "blob") . " | ";
3750                         if ($have_blame) {
3751                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3752                                                              file_name=>$diff->{'file'})},
3753                                               "blame") . " | ";
3754                         }
3755                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3756                                                      file_name=>$diff->{'file'})},
3757                                       "history");
3758                         print "</td>\n";
3759
3760                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3761                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3762                         my $nstatus = $status_name{$diff->{'status'}};
3763                         my $mode_chng = "";
3764                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3765                                 # mode also for directories, so we cannot use $to_mode_str
3766                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3767                         }
3768                         print "<td>" .
3769                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3770                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3771                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3772                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3773                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3774                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3775                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3776                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3777                               "<td class=\"link\">";
3778                         if ($action eq 'commitdiff') {
3779                                 # link to patch
3780                                 $patchno++;
3781                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3782                                       " | ";
3783                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3784                                 # "commit" view and modified file (not only pure rename or copy)
3785                                 print $cgi->a({-href => href(action=>"blobdiff",
3786                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3787                                                              hash_base=>$hash, hash_parent_base=>$parent,
3788                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3789                                               "diff") .
3790                                       " | ";
3791                         }
3792                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3793                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3794                                       "blob") . " | ";
3795                         if ($have_blame) {
3796                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3797                                                              file_name=>$diff->{'to_file'})},
3798                                               "blame") . " | ";
3799                         }
3800                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3801                                                     file_name=>$diff->{'to_file'})},
3802                                       "history");
3803                         print "</td>\n";
3804
3805                 } # we should not encounter Unmerged (U) or Unknown (X) status
3806                 print "</tr>\n";
3807         }
3808         print "</tbody>" if $has_header;
3809         print "</table>\n";
3810 }
3811
3812 sub git_patchset_body {
3813         my ($fd, $difftree, $hash, @hash_parents) = @_;
3814         my ($hash_parent) = $hash_parents[0];
3815
3816         my $is_combined = (@hash_parents > 1);
3817         my $patch_idx = 0;
3818         my $patch_number = 0;
3819         my $patch_line;
3820         my $diffinfo;
3821         my $to_name;
3822         my (%from, %to);
3823
3824         print "<div class=\"patchset\">\n";
3825
3826         # skip to first patch
3827         while ($patch_line = <$fd>) {
3828                 chomp $patch_line;
3829
3830                 last if ($patch_line =~ m/^diff /);
3831         }
3832
3833  PATCH:
3834         while ($patch_line) {
3835
3836                 # parse "git diff" header line
3837                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3838                         # $1 is from_name, which we do not use
3839                         $to_name = unquote($2);
3840                         $to_name =~ s!^b/!!;
3841                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3842                         # $1 is 'cc' or 'combined', which we do not use
3843                         $to_name = unquote($2);
3844                 } else {
3845                         $to_name = undef;
3846                 }
3847
3848                 # check if current patch belong to current raw line
3849                 # and parse raw git-diff line if needed
3850                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3851                         # this is continuation of a split patch
3852                         print "<div class=\"patch cont\">\n";
3853                 } else {
3854                         # advance raw git-diff output if needed
3855                         $patch_idx++ if defined $diffinfo;
3856
3857                         # read and prepare patch information
3858                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3859
3860                         # compact combined diff output can have some patches skipped
3861                         # find which patch (using pathname of result) we are at now;
3862                         if ($is_combined) {
3863                                 while ($to_name ne $diffinfo->{'to_file'}) {
3864                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3865                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3866                                               "</div>\n";  # class="patch"
3867
3868                                         $patch_idx++;
3869                                         $patch_number++;
3870
3871                                         last if $patch_idx > $#$difftree;
3872                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3873                                 }
3874                         }
3875
3876                         # modifies %from, %to hashes
3877                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3878
3879                         # this is first patch for raw difftree line with $patch_idx index
3880                         # we index @$difftree array from 0, but number patches from 1
3881                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3882                 }
3883
3884                 # git diff header
3885                 #assert($patch_line =~ m/^diff /) if DEBUG;
3886                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3887                 $patch_number++;
3888                 # print "git diff" header
3889                 print format_git_diff_header_line($patch_line, $diffinfo,
3890                                                   \%from, \%to);
3891
3892                 # print extended diff header
3893                 print "<div class=\"diff extended_header\">\n";
3894         EXTENDED_HEADER:
3895                 while ($patch_line = <$fd>) {
3896                         chomp $patch_line;
3897
3898                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3899
3900                         print format_extended_diff_header_line($patch_line, $diffinfo,
3901                                                                \%from, \%to);
3902                 }
3903                 print "</div>\n"; # class="diff extended_header"
3904
3905                 # from-file/to-file diff header
3906                 if (! $patch_line) {
3907                         print "</div>\n"; # class="patch"
3908                         last PATCH;
3909                 }
3910                 next PATCH if ($patch_line =~ m/^diff /);
3911                 #assert($patch_line =~ m/^---/) if DEBUG;
3912
3913                 my $last_patch_line = $patch_line;
3914                 $patch_line = <$fd>;
3915                 chomp $patch_line;
3916                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3917
3918                 print format_diff_from_to_header($last_patch_line, $patch_line,
3919                                                  $diffinfo, \%from, \%to,
3920                                                  @hash_parents);
3921
3922                 # the patch itself
3923         LINE:
3924                 while ($patch_line = <$fd>) {
3925                         chomp $patch_line;
3926
3927                         next PATCH if ($patch_line =~ m/^diff /);
3928
3929                         print format_diff_line($patch_line, \%from, \%to);
3930                 }
3931
3932         } continue {
3933                 print "</div>\n"; # class="patch"
3934         }
3935
3936         # for compact combined (--cc) format, with chunk and patch simpliciaction
3937         # patchset might be empty, but there might be unprocessed raw lines
3938         for (++$patch_idx if $patch_number > 0;
3939              $patch_idx < @$difftree;
3940              ++$patch_idx) {
3941                 # read and prepare patch information
3942                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3943
3944                 # generate anchor for "patch" links in difftree / whatchanged part
3945                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3946                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3947                       "</div>\n";  # class="patch"
3948
3949                 $patch_number++;
3950         }
3951
3952         if ($patch_number == 0) {
3953                 if (@hash_parents > 1) {
3954                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3955                 } else {
3956                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3957                 }
3958         }
3959
3960         print "</div>\n"; # class="patchset"
3961 }
3962
3963 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3964
3965 # fills project list info (age, description, owner, forks) for each
3966 # project in the list, removing invalid projects from returned list
3967 # NOTE: modifies $projlist, but does not remove entries from it
3968 sub fill_project_list_info {
3969         my ($projlist, $check_forks) = @_;
3970         my @projects;
3971
3972         my $show_ctags = gitweb_check_feature('ctags');
3973  PROJECT:
3974         foreach my $pr (@$projlist) {
3975                 my (@activity) = git_get_last_activity($pr->{'path'});
3976                 unless (@activity) {
3977                         next PROJECT;
3978                 }
3979                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3980                 if (!defined $pr->{'descr'}) {
3981                         my $descr = git_get_project_description($pr->{'path'}) || "";
3982                         $descr = to_utf8($descr);
3983                         $pr->{'descr_long'} = $descr;
3984                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3985                 }
3986                 if (!defined $pr->{'owner'}) {
3987                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3988                 }
3989                 if ($check_forks) {
3990                         my $pname = $pr->{'path'};
3991                         if (($pname =~ s/\.git$//) &&
3992                             ($pname !~ /\/$/) &&
3993                             (-d "$projectroot/$pname")) {
3994                                 $pr->{'forks'} = "-d $projectroot/$pname";
3995                         }       else {
3996                                 $pr->{'forks'} = 0;
3997                         }
3998                 }
3999                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4000                 push @projects, $pr;
4001         }
4002
4003         return @projects;
4004 }
4005
4006 # print 'sort by' <th> element, generating 'sort by $name' replay link
4007 # if that order is not selected
4008 sub print_sort_th {
4009         my ($name, $order, $header) = @_;
4010         $header ||= ucfirst($name);
4011
4012         if ($order eq $name) {
4013                 print "<th>$header</th>\n";
4014         } else {
4015                 print "<th>" .
4016                       $cgi->a({-href => href(-replay=>1, order=>$name),
4017                                -class => "header"}, $header) .
4018                       "</th>\n";
4019         }
4020 }
4021
4022 sub git_project_list_body {
4023         # actually uses global variable $project
4024         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4025
4026         my $check_forks = gitweb_check_feature('forks');
4027         my @projects = fill_project_list_info($projlist, $check_forks);
4028
4029         $order ||= $default_projects_order;
4030         $from = 0 unless defined $from;
4031         $to = $#projects if (!defined $to || $#projects < $to);
4032
4033         my %order_info = (
4034                 project => { key => 'path', type => 'str' },
4035                 descr => { key => 'descr_long', type => 'str' },
4036                 owner => { key => 'owner', type => 'str' },
4037                 age => { key => 'age', type => 'num' }
4038         );
4039         my $oi = $order_info{$order};
4040         if ($oi->{'type'} eq 'str') {
4041                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4042         } else {
4043                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4044         }
4045
4046         my $show_ctags = gitweb_check_feature('ctags');
4047         if ($show_ctags) {
4048                 my %ctags;
4049                 foreach my $p (@projects) {
4050                         foreach my $ct (keys %{$p->{'ctags'}}) {
4051                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4052                         }
4053                 }
4054                 my $cloud = git_populate_project_tagcloud(\%ctags);
4055                 print git_show_project_tagcloud($cloud, 64);
4056         }
4057
4058         print "<table class=\"project_list\">\n";
4059         unless ($no_header) {
4060                 print "<tr>\n";
4061                 if ($check_forks) {
4062                         print "<th></th>\n";
4063                 }
4064                 print_sort_th('project', $order, 'Project');
4065                 print_sort_th('descr', $order, 'Description');
4066                 print_sort_th('owner', $order, 'Owner');
4067                 print_sort_th('age', $order, 'Last Change');
4068                 print "<th></th>\n" . # for links
4069                       "</tr>\n";
4070         }
4071         my $alternate = 1;
4072         my $tagfilter = $c->req->param('by_tag');
4073         for (my $i = $from; $i <= $to; $i++) {
4074                 my $pr = $projects[$i];
4075
4076                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4077                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4078                         and not $pr->{'descr_long'} =~ /$searchtext/;
4079                 # Weed out forks or non-matching entries of search
4080                 if ($check_forks) {
4081                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4082                         $forkbase="^$forkbase" if $forkbase;
4083                         next if not $searchtext and not $tagfilter and $show_ctags
4084                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4085                 }
4086
4087                 if ($alternate) {
4088                         print "<tr class=\"dark\">\n";
4089                 } else {
4090                         print "<tr class=\"light\">\n";
4091                 }
4092                 $alternate ^= 1;
4093                 if ($check_forks) {
4094                         print "<td>";
4095                         if ($pr->{'forks'}) {
4096                                 print "<!-- $pr->{'forks'} -->\n";
4097                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4098                         }
4099                         print "</td>\n";
4100                 }
4101                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4102                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4103                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4104                                         -class => "list", -title => $pr->{'descr_long'}},
4105                                         esc_html($pr->{'descr'})) . "</td>\n" .
4106                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4107                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4108                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4109                       "<td class=\"link\">" .
4110                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4111                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4112                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4113                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4114                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4115                       "</td>\n" .
4116                       "</tr>\n";
4117         }
4118         if (defined $extra) {
4119                 print "<tr>\n";
4120                 if ($check_forks) {
4121                         print "<td></td>\n";
4122                 }
4123                 print "<td colspan=\"5\">$extra</td>\n" .
4124                       "</tr>\n";
4125         }
4126         print "</table>\n";
4127 }
4128
4129 sub git_shortlog_body {
4130         # uses global variable $project
4131         my ($commitlist, $from, $to, $refs, $extra) = @_;
4132
4133         $from = 0 unless defined $from;
4134         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4135
4136         print "<table class=\"shortlog\">\n";
4137         my $alternate = 1;
4138         for (my $i = $from; $i <= $to; $i++) {
4139                 my %co = %{$commitlist->[$i]};
4140                 my $commit = $co{'id'};
4141                 my $ref = format_ref_marker($refs, $commit);
4142                 if ($alternate) {
4143                         print "<tr class=\"dark\">\n";
4144                 } else {
4145                         print "<tr class=\"light\">\n";
4146                 }
4147                 $alternate ^= 1;
4148                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4149                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4150                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4151                       "<td><i>" . $author . "</i></td>\n" .
4152                       "<td>";
4153                 print format_subject_html($co{'title'}, $co{'title_short'},
4154                                           href(action=>"commit", hash=>$commit), $ref);
4155                 print "</td>\n" .
4156                       "<td class=\"link\">" .
4157                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4158                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4159                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4160                 my $snapshot_links = format_snapshot_links($commit);
4161                 if (defined $snapshot_links) {
4162                         print " | " . $snapshot_links;
4163                 }
4164                 print "</td>\n" .
4165                       "</tr>\n";
4166         }
4167         if (defined $extra) {
4168                 print "<tr>\n" .
4169                       "<td colspan=\"4\">$extra</td>\n" .
4170                       "</tr>\n";
4171         }
4172         print "</table>\n";
4173 }
4174
4175 sub git_history_body {
4176         # Warning: assumes constant type (blob or tree) during history
4177         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4178
4179         $from = 0 unless defined $from;
4180         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4181
4182         print "<table class=\"history\">\n";
4183         my $alternate = 1;
4184         for (my $i = $from; $i <= $to; $i++) {
4185                 my %co = %{$commitlist->[$i]};
4186                 if (!%co) {
4187                         next;
4188                 }
4189                 my $commit = $co{'id'};
4190
4191                 my $ref = format_ref_marker($refs, $commit);
4192
4193                 if ($alternate) {
4194                         print "<tr class=\"dark\">\n";
4195                 } else {
4196                         print "<tr class=\"light\">\n";
4197                 }
4198                 $alternate ^= 1;
4199         # shortlog uses      chop_str($co{'author_name'}, 10)
4200                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4201                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4202                       "<td><i>" . $author . "</i></td>\n" .
4203                       "<td>";
4204                 # originally git_history used chop_str($co{'title'}, 50)
4205                 print format_subject_html($co{'title'}, $co{'title_short'},
4206                                           href(action=>"commit", hash=>$commit), $ref);
4207                 print "</td>\n" .
4208                       "<td class=\"link\">" .
4209                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4210                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4211
4212                 if ($ftype eq 'blob') {
4213                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4214                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4215                         if (defined $blob_current && defined $blob_parent &&
4216                                         $blob_current ne $blob_parent) {
4217                                 print " | " .
4218                                         $cgi->a({-href => href(action=>"blobdiff",
4219                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4220                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4221                                                                file_name=>$file_name)},
4222                                                 "diff to current");
4223                         }
4224                 }
4225                 print "</td>\n" .
4226                       "</tr>\n";
4227         }
4228         if (defined $extra) {
4229                 print "<tr>\n" .
4230                       "<td colspan=\"4\">$extra</td>\n" .
4231                       "</tr>\n";
4232         }
4233         print "</table>\n";
4234 }
4235
4236 sub git_tags_body {
4237         # uses global variable $project
4238         my ($taglist, $from, $to, $extra) = @_;
4239         $from = 0 unless defined $from;
4240         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4241
4242         print "<table class=\"tags\">\n";
4243         my $alternate = 1;
4244         for (my $i = $from; $i <= $to; $i++) {
4245                 my $entry = $taglist->[$i];
4246                 my %tag = %$entry;
4247                 my $comment = $tag{'subject'};
4248                 my $comment_short;
4249                 if (defined $comment) {
4250                         $comment_short = chop_str($comment, 30, 5);
4251                 }
4252                 if ($alternate) {
4253                         print "<tr class=\"dark\">\n";
4254                 } else {
4255                         print "<tr class=\"light\">\n";
4256                 }
4257                 $alternate ^= 1;
4258                 if (defined $tag{'age'}) {
4259                         print "<td><i>$tag{'age'}</i></td>\n";
4260                 } else {
4261                         print "<td></td>\n";
4262                 }
4263                 print "<td>" .
4264                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4265                                -class => "list name"}, esc_html($tag{'name'})) .
4266                       "</td>\n" .
4267                       "<td>";
4268                 if (defined $comment) {
4269                         print format_subject_html($comment, $comment_short,
4270                                                   href(action=>"tag", hash=>$tag{'id'}));
4271                 }
4272                 print "</td>\n" .
4273                       "<td class=\"selflink\">";
4274                 if ($tag{'type'} eq "tag") {
4275                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4276                 } else {
4277                         print "&nbsp;";
4278                 }
4279                 print "</td>\n" .
4280                       "<td class=\"link\">" . " | " .
4281                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4282                 if ($tag{'reftype'} eq "commit") {
4283                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4284                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4285                 } elsif ($tag{'reftype'} eq "blob") {
4286                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4287                 }
4288                 print "</td>\n" .
4289                       "</tr>";
4290         }
4291         if (defined $extra) {
4292                 print "<tr>\n" .
4293                       "<td colspan=\"5\">$extra</td>\n" .
4294                       "</tr>\n";
4295         }
4296         print "</table>\n";
4297 }
4298
4299 sub git_heads_body {
4300         # uses global variable $project
4301         my ($headlist, $head, $from, $to, $extra) = @_;
4302         $from = 0 unless defined $from;
4303         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4304
4305         print "<table class=\"heads\">\n";
4306         my $alternate = 1;
4307         for (my $i = $from; $i <= $to; $i++) {
4308                 my $entry = $headlist->[$i];
4309                 my %ref = %$entry;
4310                 my $curr = $ref{'id'} eq $head;
4311                 if ($alternate) {
4312                         print "<tr class=\"dark\">\n";
4313                 } else {
4314                         print "<tr class=\"light\">\n";
4315                 }
4316                 $alternate ^= 1;
4317                 print "<td><i>$ref{'age'}</i></td>\n" .
4318                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4319                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4320                                -class => "list name"},esc_html($ref{'name'})) .
4321                       "</td>\n" .
4322                       "<td class=\"link\">" .
4323                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4324                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4325                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4326                       "</td>\n" .
4327                       "</tr>";
4328         }
4329         if (defined $extra) {
4330                 print "<tr>\n" .
4331                       "<td colspan=\"3\">$extra</td>\n" .
4332                       "</tr>\n";
4333         }
4334         print "</table>\n";
4335 }
4336
4337 sub git_search_grep_body {
4338         my ($commitlist, $from, $to, $extra) = @_;
4339         $from = 0 unless defined $from;
4340         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4341
4342         print "<table class=\"commit_search\">\n";
4343         my $alternate = 1;
4344         for (my $i = $from; $i <= $to; $i++) {
4345                 my %co = %{$commitlist->[$i]};
4346                 if (!%co) {
4347                         next;
4348                 }
4349                 my $commit = $co{'id'};
4350                 if ($alternate) {
4351                         print "<tr class=\"dark\">\n";
4352                 } else {
4353                         print "<tr class=\"light\">\n";
4354                 }
4355                 $alternate ^= 1;
4356                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4357                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4358                       "<td><i>" . $author . "</i></td>\n" .
4359                       "<td>" .
4360                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4361                                -class => "list subject"},
4362                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4363                 my $comment = $co{'comment'};
4364                 foreach my $line (@$comment) {
4365                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4366                                 my ($lead, $match, $trail) = ($1, $2, $3);
4367                                 $match = chop_str($match, 70, 5, 'center');
4368                                 my $contextlen = int((80 - length($match))/2);
4369                                 $contextlen = 30 if ($contextlen > 30);
4370                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4371                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4372
4373                                 $lead  = esc_html($lead);
4374                                 $match = esc_html($match);
4375                                 $trail = esc_html($trail);
4376
4377                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4378                         }
4379                 }
4380                 print "</td>\n" .
4381                       "<td class=\"link\">" .
4382                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4383                       " | " .
4384                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4385                       " | " .
4386                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4387                 print "</td>\n" .
4388                       "</tr>\n";
4389         }
4390         if (defined $extra) {
4391                 print "<tr>\n" .
4392                       "<td colspan=\"3\">$extra</td>\n" .
4393                       "</tr>\n";
4394         }
4395         print "</table>\n";
4396 }
4397
4398 ## ======================================================================
4399 ## ======================================================================
4400 ## actions
4401
4402 sub git_project_list {
4403         my $order = $input_params{'order'};
4404         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4405                 die_error(400, "Unknown order parameter");
4406         }
4407
4408         my @list = git_get_projects_list();
4409         if (!@list) {
4410                 die_error(404, "No projects found");
4411         }
4412
4413         if (-f $home_text) {
4414                 print "<div class=\"index_include\">\n";
4415                 print insert_file($home_text);
4416                 print "</div>\n";
4417         }
4418         print $cgi->startform(-method => "get") .
4419               "<p class=\"projsearch\">Search:\n" .
4420               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4421               "</p>" .
4422               $cgi->end_form() . "\n";
4423         git_project_list_body(\@list, $order);
4424 }
4425
4426 sub git_forks {
4427         my $order = $input_params{'order'};
4428         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4429                 die_error(400, "Unknown order parameter");
4430         }
4431
4432         my @list = git_get_projects_list($project);
4433         if (!@list) {
4434                 die_error(404, "No forks found");
4435         }
4436
4437         git_print_page_nav('','');
4438         git_print_header_div('summary', "$project forks");
4439         git_project_list_body(\@list, $order);
4440 }
4441
4442 sub git_project_index {
4443         my @projects = git_get_projects_list($project);
4444
4445         print $cgi->header(
4446                 -type => 'text/plain',
4447                 -charset => 'utf-8',
4448                 -content_disposition => 'inline; filename="index.aux"');
4449
4450         foreach my $pr (@projects) {
4451                 if (!exists $pr->{'owner'}) {
4452                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4453                 }
4454
4455                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4456                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4457                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4458                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4459                 $path  =~ s/ /\+/g;
4460                 $owner =~ s/ /\+/g;
4461
4462                 print "$path $owner\n";
4463         }
4464 }
4465
4466 sub git_summary {
4467         my $descr = git_get_project_description($project) || "none";
4468         my %co = parse_commit("HEAD");
4469         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4470         my $head = $co{'id'};
4471
4472         my $owner = git_get_project_owner($project);
4473
4474         my $refs = git_get_references();
4475         # These get_*_list functions return one more to allow us to see if
4476         # there are more ...
4477         my @taglist  = git_get_tags_list(16);
4478         my @headlist = git_get_heads_list(16);
4479         my @forklist;
4480         my $check_forks = gitweb_check_feature('forks');
4481
4482         if ($check_forks) {
4483                 @forklist = git_get_projects_list($project);
4484         }
4485
4486         git_print_page_nav('summary','', $head);
4487
4488         print "<div class=\"title\">&nbsp;</div>\n";
4489         print "<table class=\"projects_list\">\n" .
4490               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4491               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4492         if (defined $cd{'rfc2822'}) {
4493                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4494         }
4495
4496         # use per project git URL list in $projectroot/$project/cloneurl
4497         # or make project git URL from git base URL and project name
4498         my $url_tag = "URL";
4499         my @url_list = git_get_project_url_list($project);
4500         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4501         foreach my $git_url (@url_list) {
4502                 next unless $git_url;
4503                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4504                 $url_tag = "";
4505         }
4506
4507         # Tag cloud
4508         my $show_ctags = gitweb_check_feature('ctags');
4509         if ($show_ctags) {
4510                 my $ctags = git_get_project_ctags($project);
4511                 my $cloud = git_populate_project_tagcloud($ctags);
4512                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4513                 print "</td>\n<td>" unless %$ctags;
4514                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4515                 print "</td>\n<td>" if %$ctags;
4516                 print git_show_project_tagcloud($cloud, 48);
4517                 print "</td></tr>";
4518         }
4519
4520         print "</table>\n";
4521
4522         # If XSS prevention is on, we don't include README.html.
4523         # TODO: Allow a readme in some safe format.
4524         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4525                 print "<div class=\"title\">readme</div>\n" .
4526                       "<div class=\"readme\">\n";
4527                 print insert_file("$projectroot/$project/README.html");
4528                 print "\n</div>\n"; # class="readme"
4529         }
4530
4531         # we need to request one more than 16 (0..15) to check if
4532         # those 16 are all
4533         my @commitlist = $head ? parse_commits($head, 17) : ();
4534         if (@commitlist) {
4535                 git_print_header_div('shortlog');
4536                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4537                                   $#commitlist <=  15 ? undef :
4538                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4539         }
4540
4541         if (@taglist) {
4542                 git_print_header_div('tags');
4543                 git_tags_body(\@taglist, 0, 15,
4544                               $#taglist <=  15 ? undef :
4545                               $cgi->a({-href => href(action=>"tags")}, "..."));
4546         }
4547
4548         if (@headlist) {
4549                 git_print_header_div('heads');
4550                 git_heads_body(\@headlist, $head, 0, 15,
4551                                $#headlist <= 15 ? undef :
4552                                $cgi->a({-href => href(action=>"heads")}, "..."));
4553         }
4554
4555         if (@forklist) {
4556                 git_print_header_div('forks');
4557                 git_project_list_body(\@forklist, 'age', 0, 15,
4558                                       $#forklist <= 15 ? undef :
4559                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4560                                       'no_header');
4561         }
4562
4563 }
4564
4565 sub git_tag {
4566         my $head = git_get_head_hash($project);
4567         git_print_page_nav('','', $head,undef,$head);
4568         my %tag = parse_tag($hash);
4569
4570         if (! %tag) {
4571                 die_error(404, "Unknown tag object");
4572         }
4573
4574         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4575         print "<div class=\"title_text\">\n" .
4576               "<table class=\"object_header\">\n" .
4577               "<tr>\n" .
4578               "<td>object</td>\n" .
4579               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4580                                $tag{'object'}) . "</td>\n" .
4581               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4582                                               $tag{'type'}) . "</td>\n" .
4583               "</tr>\n";
4584         if (defined($tag{'author'})) {
4585                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4586                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4587                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4588                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4589                         "</td></tr>\n";
4590         }
4591         print "</table>\n\n" .
4592               "</div>\n";
4593         print "<div class=\"page_body\">";
4594         my $comment = $tag{'comment'};
4595         foreach my $line (@$comment) {
4596                 chomp $line;
4597                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4598         }
4599         print "</div>\n";
4600 }
4601
4602 sub git_blame {
4603         # permissions
4604         gitweb_check_feature('blame')
4605                 or die_error(403, "Blame view not allowed");
4606
4607         # error checking
4608         die_error(400, "No file name given") unless $file_name;
4609         $hash_base ||= git_get_head_hash($project);
4610         die_error(404, "Couldn't find base commit") unless $hash_base;
4611         my %co = parse_commit($hash_base)
4612                 or die_error(404, "Commit not found");
4613         my $ftype = "blob";
4614         if (!defined $hash) {
4615                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4616                         or die_error(404, "Error looking up file");
4617         } else {
4618                 $ftype = git_get_type($hash);
4619                 if ($ftype !~ "blob") {
4620                         die_error(400, "Object is not a blob - $hash");
4621                 }
4622         }
4623
4624         # run git-blame --porcelain
4625         open my $fd, "-|", git_cmd(), "blame", '-p',
4626                 $hash_base, '--', $file_name
4627                 or die_error(500, "Open git-blame failed");
4628
4629         # page header
4630         my $formats_nav =
4631                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4632                         "blob") .
4633                 " | " .
4634                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4635                         "history") .
4636                 " | " .
4637                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4638                         "HEAD");
4639         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4640         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4641         git_print_page_path($file_name, $ftype, $hash_base);
4642
4643         # page body
4644         my @rev_color = qw(light2 dark2);
4645         my $num_colors = scalar(@rev_color);
4646         my $current_color = 0;
4647         my %metainfo = ();
4648
4649         print <<HTML;
4650 <div class="page_body">
4651 <table class="blame">
4652 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4653 HTML
4654  LINE:
4655         while (my $line = <$fd>) {
4656                 chomp $line;
4657                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4658                 # no <lines in group> for subsequent lines in group of lines
4659                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4660                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4661                 if (!exists $metainfo{$full_rev}) {
4662                         $metainfo{$full_rev} = {};
4663                 }
4664                 my $meta = $metainfo{$full_rev};
4665                 my $data;
4666                 while ($data = <$fd>) {
4667                         chomp $data;
4668                         last if ($data =~ s/^\t//); # contents of line
4669                         if ($data =~ /^(\S+) (.*)$/) {
4670                                 $meta->{$1} = $2;
4671                         }
4672                 }
4673                 my $short_rev = substr($full_rev, 0, 8);
4674                 my $author = $meta->{'author'};
4675                 my %date =
4676                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4677                 my $date = $date{'iso-tz'};
4678                 if ($group_size) {
4679                         $current_color = ($current_color + 1) % $num_colors;
4680                 }
4681                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4682                 if ($group_size) {
4683                         print "<td class=\"sha1\"";
4684                         print " title=\"". esc_html($author) . ", $date\"";
4685                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4686                         print ">";
4687                         print $cgi->a({-href => href(action=>"commit",
4688                                                      hash=>$full_rev,
4689                                                      file_name=>$file_name)},
4690                                       esc_html($short_rev));
4691                         print "</td>\n";
4692                 }
4693                 my $parent_commit;
4694                 if (!exists $meta->{'parent'}) {
4695                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4696                                 or die_error(500, "Open git-rev-parse failed");
4697                         $parent_commit = <$dd>;
4698                         close $dd;
4699                         chomp($parent_commit);
4700                         $meta->{'parent'} = $parent_commit;
4701                 } else {
4702                         $parent_commit = $meta->{'parent'};
4703                 }
4704                 my $blamed = href(action => 'blame',
4705                                   file_name => $meta->{'filename'},
4706                                   hash_base => $parent_commit);
4707                 print "<td class=\"linenr\">";
4708                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4709                                 -class => "linenr" },
4710                               esc_html($lineno));
4711                 print "</td>";
4712                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4713                 print "</tr>\n";
4714         }
4715         print "</table>\n";
4716         print "</div>";
4717         close $fd
4718                 or print "Reading blob failed\n";
4719
4720         # page footer
4721 }
4722
4723 sub git_tags {
4724         my $head = git_get_head_hash($project);
4725         git_print_page_nav('','', $head,undef,$head);
4726         git_print_header_div('summary', $project);
4727
4728         my @tagslist = git_get_tags_list();
4729         if (@tagslist) {
4730                 git_tags_body(\@tagslist);
4731         }
4732 }
4733
4734 sub git_heads {
4735         my $head = git_get_head_hash($project);
4736         git_print_page_nav('','', $head,undef,$head);
4737         git_print_header_div('summary', $project);
4738
4739         my @headslist = git_get_heads_list();
4740         if (@headslist) {
4741                 git_heads_body(\@headslist, $head);
4742         }
4743 }
4744
4745 sub git_blob_plain {
4746         my $type = shift;
4747         my $expires;
4748
4749         if (!defined $hash) {
4750                 if (defined $file_name) {
4751                         my $base = $hash_base || git_get_head_hash($project);
4752                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4753                                 or die_error(404, "Cannot find file");
4754                 } else {
4755                         die_error(400, "No file name defined");
4756                 }
4757         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4758                 # blobs defined by non-textual hash id's can be cached
4759                 $expires = "+1d";
4760         }
4761
4762         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4763                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4764
4765         # content-type (can include charset)
4766         $type = blob_contenttype($fd, $file_name, $type);
4767
4768         # "save as" filename, even when no $file_name is given
4769         my $save_as = "$hash";
4770         if (defined $file_name) {
4771                 $save_as = $file_name;
4772         } elsif ($type =~ m/^text\//) {
4773                 $save_as .= '.txt';
4774         }
4775
4776         # With XSS prevention on, blobs of all types except a few known safe
4777         # ones are served with "Content-Disposition: attachment" to make sure
4778         # they don't run in our security domain.  For certain image types,
4779         # blob view writes an <img> tag referring to blob_plain view, and we
4780         # want to be sure not to break that by serving the image as an
4781         # attachment (though Firefox 3 doesn't seem to care).
4782         my $sandbox = $prevent_xss &&
4783                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4784
4785         print $cgi->header(
4786                 -type => $type,
4787                 -expires => $expires,
4788                 -content_disposition =>
4789                         ($sandbox ? 'attachment' : 'inline')
4790                         . '; filename="' . $save_as . '"');
4791         undef $/;
4792         binmode STDOUT, ':raw';
4793         print <$fd>;
4794         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4795         $/ = "\n";
4796         close $fd;
4797 }
4798
4799 sub git_blob {
4800         my $expires;
4801
4802         if (!defined $hash) {
4803                 if (defined $file_name) {
4804                         my $base = $hash_base || git_get_head_hash($project);
4805                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4806                                 or die_error(404, "Cannot find file");
4807                 } else {
4808                         die_error(400, "No file name defined");
4809                 }
4810         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4811                 # blobs defined by non-textual hash id's can be cached
4812                 $expires = "+1d";
4813         }
4814
4815         my $have_blame = gitweb_check_feature('blame');
4816         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4817                 or die_error(500, "Couldn't cat $file_name, $hash");
4818         my $mimetype = blob_mimetype($fd, $file_name);
4819         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4820                 close $fd;
4821                 return git_blob_plain($mimetype);
4822         }
4823         # we can have blame only for text/* mimetype
4824         $have_blame &&= ($mimetype =~ m!^text/!);
4825
4826         my $formats_nav = '';
4827         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4828                 if (defined $file_name) {
4829                         if ($have_blame) {
4830                                 $formats_nav .=
4831                                         $cgi->a({-href => href(action=>"blame", hash => $hash, -replay=>1)},
4832                                                 "blame") .
4833                                         " | ";
4834                         }
4835                         $formats_nav .=
4836                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4837                                         "history") .
4838                                 " | " .
4839                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4840                                         "raw") .
4841                                 " | " .
4842                                 $cgi->a({-href => href(action=>"blob",
4843                                                        hash_base=>"HEAD", file_name=>$file_name)},
4844                                         "HEAD");
4845                 } else {
4846                         $formats_nav .=
4847                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4848                                         "raw");
4849                 }
4850                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4851                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4852         } else {
4853                 print "<div class=\"page_nav\">\n" .
4854                       "<br/><br/></div>\n" .
4855                       "<div class=\"title\">$hash</div>\n";
4856         }
4857         git_print_page_path($file_name, "blob", $hash_base);
4858         print "<div class=\"page_body\">\n";
4859         if ($mimetype =~ m!^image/!) {
4860                 print qq!<img type="$mimetype"!;
4861                 if ($file_name) {
4862                         print qq! alt="$file_name" title="$file_name"!;
4863                 }
4864                 print qq! src="! .
4865                       href(action=>"blob_plain", hash=>$hash,
4866                            hash_base=>$hash_base, file_name=>$file_name) .
4867                       qq!" />\n!;
4868         } else {
4869                 my $nr;
4870                 while (my $line = <$fd>) {
4871                         chomp $line;
4872                         $nr++;
4873                         $line = untabify($line);
4874                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4875                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4876                 }
4877         }
4878         close $fd
4879                 or print "Reading blob failed.\n";
4880         print "</div>";
4881 }
4882
4883 sub git_tree {
4884         if (!defined $hash_base) {
4885                 $hash_base = "HEAD";
4886         }
4887         if (!defined $hash) {
4888                 if (defined $file_name) {
4889                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4890                 } else {
4891                         $hash = $hash_base;
4892                 }
4893         }
4894         die_error(404, "No such tree") unless defined($hash);
4895         $/ = "\0";
4896         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4897                 or die_error(500, "Open git-ls-tree failed");
4898         my @entries = map { chomp; $_ } <$fd>;
4899         close $fd or die_error(404, "Reading tree failed");
4900         $/ = "\n";
4901
4902         my $refs = git_get_references();
4903         my $ref = format_ref_marker($refs, $hash_base);
4904         my $basedir = '';
4905         my $have_blame = gitweb_check_feature('blame');
4906         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4907                 my @views_nav = ();
4908                 if (defined $file_name) {
4909                         push @views_nav,
4910                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4911                                         "history"),
4912                                 $cgi->a({-href => href(action=>"tree",
4913                                                        hash_base=>"HEAD", file_name=>$file_name)},
4914                                         "HEAD"),
4915                 }
4916                 my $snapshot_links = format_snapshot_links($hash);
4917                 if (defined $snapshot_links) {
4918                         # FIXME: Should be available when we have no hash base as well.
4919                         push @views_nav, $snapshot_links;
4920                 }
4921                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4922                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4923         } else {
4924                 undef $hash_base;
4925                 print "<div class=\"page_nav\">\n";
4926                 print "<br/><br/></div>\n";
4927                 print "<div class=\"title\">$hash</div>\n";
4928         }
4929         if (defined $file_name) {
4930                 $basedir = $file_name;
4931                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4932                         $basedir .= '/';
4933                 }
4934                 git_print_page_path($file_name, 'tree', $hash_base);
4935         }
4936         print "<div class=\"page_body\">\n";
4937         print "<table class=\"tree\">\n";
4938         my $alternate = 1;
4939         # '..' (top directory) link if possible
4940         if (defined $hash_base &&
4941             defined $file_name && $file_name =~ m![^/]+$!) {
4942                 if ($alternate) {
4943                         print "<tr class=\"dark\">\n";
4944                 } else {
4945                         print "<tr class=\"light\">\n";
4946                 }
4947                 $alternate ^= 1;
4948
4949                 my $up = $file_name;
4950                 $up =~ s!/?[^/]+$!!;
4951                 undef $up unless $up;
4952                 # based on git_print_tree_entry
4953                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4954                 print '<td class="list">';
4955                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4956                                              file_name=>$up)},
4957                               "..");
4958                 print "</td>\n";
4959                 print "<td class=\"link\"></td>\n";
4960
4961                 print "</tr>\n";
4962         }
4963         foreach my $line (@entries) {
4964                 my %t = parse_ls_tree_line($line, -z => 1);
4965
4966                 if ($alternate) {
4967                         print "<tr class=\"dark\">\n";
4968                 } else {
4969                         print "<tr class=\"light\">\n";
4970                 }
4971                 $alternate ^= 1;
4972
4973                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4974
4975                 print "</tr>\n";
4976         }
4977         print "</table>\n" .
4978               "</div>";
4979 }
4980
4981 sub git_snapshot {
4982         my $format = $input_params{'snapshot_format'};
4983         if (!@snapshot_fmts) {
4984                 die_error(403, "Snapshots not allowed");
4985         }
4986         # default to first supported snapshot format
4987         $format ||= $snapshot_fmts[0];
4988         if ($format !~ m/^[a-z0-9]+$/) {
4989                 die_error(400, "Invalid snapshot format parameter");
4990         } elsif (!exists($known_snapshot_formats{$format})) {
4991                 die_error(400, "Unknown snapshot format");
4992         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
4993                 die_error(403, "Unsupported snapshot format");
4994         }
4995
4996         if (!defined $hash) {
4997                 $hash = git_get_head_hash($project);
4998         }
4999
5000         my $name = $project;
5001         $name =~ s,([^/])/*\.git$,$1,;
5002         $name = basename($name);
5003         my $filename = to_utf8($name);
5004         $name =~ s/\047/\047\\\047\047/g;
5005         my $cmd;
5006         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5007         $cmd = quote_command(
5008                 git_cmd(), 'archive',
5009                 "--format=$known_snapshot_formats{$format}{'format'}",
5010                 "--prefix=$name/", $hash);
5011         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5012                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5013         }
5014
5015         print $cgi->header(
5016                 -type => $known_snapshot_formats{$format}{'type'},
5017                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5018                 -status => '200 OK');
5019
5020         open my $fd, "-|", $cmd
5021                 or die_error(500, "Execute git-archive failed");
5022         binmode STDOUT, ':raw';
5023         print <$fd>;
5024         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5025         close $fd;
5026 }
5027
5028 sub git_log {
5029         my $head = git_get_head_hash($project);
5030         if (!defined $hash) {
5031                 $hash = $head;
5032         }
5033         if (!defined $page) {
5034                 $page = 0;
5035         }
5036         my $refs = git_get_references();
5037
5038         my @commitlist = parse_commits($hash, 101, (100 * $page));
5039
5040         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5041
5042         my ($patch_max) = gitweb_get_feature('patches');
5043         if ($patch_max) {
5044                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5045                         $paging_nav .= " &sdot; " .
5046                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5047                                         "patches");
5048                 }
5049         }
5050
5051         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5052
5053         if (!@commitlist) {
5054                 my %co = parse_commit($hash);
5055
5056                 git_print_header_div('summary', $project);
5057                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5058         }
5059         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5060         for (my $i = 0; $i <= $to; $i++) {
5061                 my %co = %{$commitlist[$i]};
5062                 next if !%co;
5063                 my $commit = $co{'id'};
5064                 my $ref = format_ref_marker($refs, $commit);
5065                 my %ad = parse_date($co{'author_epoch'});
5066                 git_print_header_div('commit',
5067                                "<span class=\"age\">$co{'age_string'}</span>" .
5068                                esc_html($co{'title'}) . $ref,
5069                                $commit);
5070                 print "<div class=\"title_text\">\n" .
5071                       "<div class=\"log_link\">\n" .
5072                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5073                       " | " .
5074                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5075                       " | " .
5076                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5077                       "<br/>\n" .
5078                       "</div>\n" .
5079                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5080                       "</div>\n";
5081
5082                 print "<div class=\"log_body\">\n";
5083                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5084                 print "</div>\n";
5085         }
5086         if ($#commitlist >= 100) {
5087                 print "<div class=\"page_nav\">\n";
5088                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5089                                -accesskey => "n", -title => "Alt-n"}, "next");
5090                 print "</div>\n";
5091         }
5092 }
5093
5094 sub git_commit {
5095         $hash ||= $hash_base || "HEAD";
5096         my %co = parse_commit($hash)
5097             or die_error(404, "Unknown commit object");
5098         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5099         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5100
5101         my $parent  = $co{'parent'};
5102         my $parents = $co{'parents'}; # listref
5103
5104         # we need to prepare $formats_nav before any parameter munging
5105         my $formats_nav;
5106         if (!defined $parent) {
5107                 # --root commitdiff
5108                 $formats_nav .= '(initial)';
5109         } elsif (@$parents == 1) {
5110                 # single parent commit
5111                 $formats_nav .=
5112                         '(parent: ' .
5113                         $cgi->a({-href => href(action=>"commit",
5114                                                hash=>$parent)},
5115                                 esc_html(substr($parent, 0, 7))) .
5116                         ')';
5117         } else {
5118                 # merge commit
5119                 $formats_nav .=
5120                         '(merge: ' .
5121                         join(' ', map {
5122                                 $cgi->a({-href => href(action=>"commit",
5123                                                        hash=>$_)},
5124                                         esc_html(substr($_, 0, 7)));
5125                         } @$parents ) .
5126                         ')';
5127         }
5128         if (gitweb_check_feature('patches')) {
5129                 $formats_nav .= " | " .
5130                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5131                                 "patch");
5132         }
5133
5134         if (!defined $parent) {
5135                 $parent = "--root";
5136         }
5137         my @difftree;
5138         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5139                 @diff_opts,
5140                 (@$parents <= 1 ? $parent : '-c'),
5141                 $hash, "--"
5142                 or die_error(500, "Open git-diff-tree failed");
5143         @difftree = map { chomp; $_ } <$fd>;
5144         close $fd or die_error(404, "Reading git-diff-tree failed");
5145
5146         # non-textual hash id's can be cached
5147         my $expires;
5148         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5149                 $expires = "+1d";
5150         }
5151         my $refs = git_get_references();
5152         my $ref = format_ref_marker($refs, $co{'id'});
5153
5154         git_print_page_nav('commit', '',
5155                            $hash, $co{'tree'}, $hash,
5156                            $formats_nav);
5157
5158         if (defined $co{'parent'}) {
5159                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5160         } else {
5161                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5162         }
5163         print "<div class=\"title_text\">\n" .
5164               "<table class=\"object_header\">\n";
5165         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5166               "<tr>" .
5167               "<td></td><td> $ad{'rfc2822'}";
5168         if ($ad{'hour_local'} < 6) {
5169                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5170                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5171         } else {
5172                 printf(" (%02d:%02d %s)",
5173                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5174         }
5175         print "</td>" .
5176               "</tr>\n";
5177         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5178         print "<tr><td></td><td> $cd{'rfc2822'}" .
5179               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5180               "</td></tr>\n";
5181         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5182         print "<tr>" .
5183               "<td>tree</td>" .
5184               "<td class=\"sha1\">" .
5185               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5186                        class => "list"}, $co{'tree'}) .
5187               "</td>" .
5188               "<td class=\"link\">" .
5189               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5190                       "tree");
5191         my $snapshot_links = format_snapshot_links($hash);
5192         if (defined $snapshot_links) {
5193                 print " | " . $snapshot_links;
5194         }
5195         print "</td>" .
5196               "</tr>\n";
5197
5198         foreach my $par (@$parents) {
5199                 print "<tr>" .
5200                       "<td>parent</td>" .
5201                       "<td class=\"sha1\">" .
5202                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5203                                class => "list"}, $par) .
5204                       "</td>" .
5205                       "<td class=\"link\">" .
5206                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5207                       " | " .
5208                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5209                       "</td>" .
5210                       "</tr>\n";
5211         }
5212         print "</table>".
5213               "</div>\n";
5214
5215         print "<div class=\"page_body\">\n";
5216         git_print_log($co{'comment'});
5217         print "</div>\n";
5218
5219         git_difftree_body(\@difftree, $hash, @$parents);
5220
5221 }
5222
5223 sub git_object {
5224         # object is defined by:
5225         # - hash or hash_base alone
5226         # - hash_base and file_name
5227         my $type;
5228
5229         # - hash or hash_base alone
5230         if ($hash || ($hash_base && !defined $file_name)) {
5231                 my $object_id = $hash || $hash_base;
5232
5233                 open my $fd, "-|", quote_command(
5234                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5235                         or die_error(404, "Object does not exist");
5236                 $type = <$fd>;
5237                 chomp $type;
5238                 close $fd
5239                         or die_error(404, "Object does not exist");
5240
5241         # - hash_base and file_name
5242         } elsif ($hash_base && defined $file_name) {
5243                 $file_name =~ s,/+$,,;
5244
5245                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5246                         or die_error(404, "Base object does not exist");
5247
5248                 # here errors should not hapen
5249                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5250                         or die_error(500, "Open git-ls-tree failed");
5251                 my $line = <$fd>;
5252                 close $fd;
5253
5254                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5255                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5256                         die_error(404, "File or directory for given base does not exist");
5257                 }
5258                 $type = $2;
5259                 $hash = $3;
5260         } else {
5261                 die_error(400, "Not enough information to find object");
5262         }
5263
5264         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5265                                           hash=>$hash, hash_base=>$hash_base,
5266                                           file_name=>$file_name),
5267                              -status => '302 Found');
5268 }
5269
5270 sub git_blobdiff {
5271         my $format = shift || 'html';
5272
5273         my $fd;
5274         my @difftree;
5275         my %diffinfo;
5276         my $expires;
5277
5278         # preparing $fd and %diffinfo for git_patchset_body
5279         # new style URI
5280         if (defined $hash_base && defined $hash_parent_base) {
5281                 if (defined $file_name) {
5282                         # read raw output
5283                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5284                                 $hash_parent_base, $hash_base,
5285                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5286                                 or die_error(500, "Open git-diff-tree failed");
5287                         @difftree = map { chomp; $_ } <$fd>;
5288                         close $fd
5289                                 or die_error(404, "Reading git-diff-tree failed");
5290                         @difftree
5291                                 or die_error(404, "Blob diff not found");
5292
5293                 } elsif (defined $hash &&
5294                          $hash =~ /[0-9a-fA-F]{40}/) {
5295                         # try to find filename from $hash
5296
5297                         # read filtered raw output
5298                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5299                                 $hash_parent_base, $hash_base, "--"
5300                                 or die_error(500, "Open git-diff-tree failed");
5301                         @difftree =
5302                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5303                                 # $hash == to_id
5304                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5305                                 map { chomp; $_ } <$fd>;
5306                         close $fd
5307                                 or die_error(404, "Reading git-diff-tree failed");
5308                         @difftree
5309                                 or die_error(404, "Blob diff not found");
5310
5311                 } else {
5312                         die_error(400, "Missing one of the blob diff parameters");
5313                 }
5314
5315                 if (@difftree > 1) {
5316                         die_error(400, "Ambiguous blob diff specification");
5317                 }
5318
5319                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5320                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5321                 $file_name   ||= $diffinfo{'to_file'};
5322
5323                 $hash_parent ||= $diffinfo{'from_id'};
5324                 $hash        ||= $diffinfo{'to_id'};
5325
5326                 # non-textual hash id's can be cached
5327                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5328                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5329                         $expires = '+1d';
5330                 }
5331
5332                 # open patch output
5333                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5334                         '-p', ($format eq 'html' ? "--full-index" : ()),
5335                         $hash_parent_base, $hash_base,
5336                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5337                         or die_error(500, "Open git-diff-tree failed");
5338         }
5339
5340         # old/legacy style URI -- not generated anymore since 1.4.3.
5341         if (!%diffinfo) {
5342                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5343         }
5344
5345         # header
5346         if ($format eq 'html') {
5347                 my $formats_nav =
5348                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5349                                 "raw");
5350                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5351                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5352                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5353                 } else {
5354                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5355                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5356                 }
5357                 if (defined $file_name) {
5358                         git_print_page_path($file_name, "blob", $hash_base);
5359                 } else {
5360                         print "<div class=\"page_path\"></div>\n";
5361                 }
5362
5363         } elsif ($format eq 'plain') {
5364                 print $cgi->header(
5365                         -type => 'text/plain',
5366                         -charset => 'utf-8',
5367                         -expires => $expires,
5368                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5369
5370                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5371
5372         } else {
5373                 die_error(400, "Unknown blobdiff format");
5374         }
5375
5376         # patch
5377         if ($format eq 'html') {
5378                 print "<div class=\"page_body\">\n";
5379
5380                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5381                 close $fd;
5382
5383                 print "</div>\n"; # class="page_body"
5384
5385         } else {
5386                 while (my $line = <$fd>) {
5387                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5388                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5389
5390                         print $line;
5391
5392                         last if $line =~ m!^\+\+\+!;
5393                 }
5394                 local $/ = undef;
5395                 print <$fd>;
5396                 close $fd;
5397         }
5398 }
5399
5400 sub git_blobdiff_plain {
5401         git_blobdiff('plain');
5402 }
5403
5404 sub git_commitdiff {
5405         my %params = @_;
5406         my $format = $params{-format} || 'html';
5407
5408         my ($patch_max) = gitweb_get_feature('patches');
5409         if ($format eq 'patch') {
5410                 die_error(403, "Patch view not allowed") unless $patch_max;
5411         }
5412
5413         $hash ||= $hash_base || "HEAD";
5414         my %co = parse_commit($hash)
5415             or die_error(404, "Unknown commit object");
5416
5417         # choose format for commitdiff for merge
5418         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5419                 $hash_parent = '--cc';
5420         }
5421         # we need to prepare $formats_nav before almost any parameter munging
5422         my $formats_nav;
5423         if ($format eq 'html') {
5424                 $formats_nav =
5425                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5426                                 "raw");
5427                 if ($patch_max) {
5428                         $formats_nav .= " | " .
5429                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5430                                         "patch");
5431                 }
5432
5433                 if (defined $hash_parent &&
5434                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5435                         # commitdiff with two commits given
5436                         my $hash_parent_short = $hash_parent;
5437                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5438                                 $hash_parent_short = substr($hash_parent, 0, 7);
5439                         }
5440                         $formats_nav .=
5441                                 ' (from';
5442                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5443                                 if ($co{'parents'}[$i] eq $hash_parent) {
5444                                         $formats_nav .= ' parent ' . ($i+1);
5445                                         last;
5446                                 }
5447                         }
5448                         $formats_nav .= ': ' .
5449                                 $cgi->a({-href => href(action=>"commitdiff",
5450                                                        hash=>$hash_parent)},
5451                                         esc_html($hash_parent_short)) .
5452                                 ')';
5453                 } elsif (!$co{'parent'}) {
5454                         # --root commitdiff
5455                         $formats_nav .= ' (initial)';
5456                 } elsif (scalar @{$co{'parents'}} == 1) {
5457                         # single parent commit
5458                         $formats_nav .=
5459                                 ' (parent: ' .
5460                                 $cgi->a({-href => href(action=>"commitdiff",
5461                                                        hash=>$co{'parent'})},
5462                                         esc_html(substr($co{'parent'}, 0, 7))) .
5463                                 ')';
5464                 } else {
5465                         # merge commit
5466                         if ($hash_parent eq '--cc') {
5467                                 $formats_nav .= ' | ' .
5468                                         $cgi->a({-href => href(action=>"commitdiff",
5469                                                                hash=>$hash, hash_parent=>'-c')},
5470                                                 'combined');
5471                         } else { # $hash_parent eq '-c'
5472                                 $formats_nav .= ' | ' .
5473                                         $cgi->a({-href => href(action=>"commitdiff",
5474                                                                hash=>$hash, hash_parent=>'--cc')},
5475                                                 'compact');
5476                         }
5477                         $formats_nav .=
5478                                 ' (merge: ' .
5479                                 join(' ', map {
5480                                         $cgi->a({-href => href(action=>"commitdiff",
5481                                                                hash=>$_)},
5482                                                 esc_html(substr($_, 0, 7)));
5483                                 } @{$co{'parents'}} ) .
5484                                 ')';
5485                 }
5486         }
5487
5488         my $hash_parent_param = $hash_parent;
5489         if (!defined $hash_parent_param) {
5490                 # --cc for multiple parents, --root for parentless
5491                 $hash_parent_param =
5492                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5493         }
5494
5495         # read commitdiff
5496         my $fd;
5497         my @difftree;
5498         if ($format eq 'html') {
5499                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5500                         "--no-commit-id", "--patch-with-raw", "--full-index",
5501                         $hash_parent_param, $hash, "--"
5502                         or die_error(500, "Open git-diff-tree failed");
5503
5504                 while (my $line = <$fd>) {
5505                         chomp $line;
5506                         # empty line ends raw part of diff-tree output
5507                         last unless $line;
5508                         push @difftree, scalar parse_difftree_raw_line($line);
5509                 }
5510
5511         } elsif ($format eq 'plain') {
5512                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5513                         '-p', $hash_parent_param, $hash, "--"
5514                         or die_error(500, "Open git-diff-tree failed");
5515         } elsif ($format eq 'patch') {
5516                 # For commit ranges, we limit the output to the number of
5517                 # patches specified in the 'patches' feature.
5518                 # For single commits, we limit the output to a single patch,
5519                 # diverging from the git-format-patch default.
5520                 my @commit_spec = ();
5521                 if ($hash_parent) {
5522                         if ($patch_max > 0) {
5523                                 push @commit_spec, "-$patch_max";
5524                         }
5525                         push @commit_spec, '-n', "$hash_parent..$hash";
5526                 } else {
5527                         if ($params{-single}) {
5528                                 push @commit_spec, '-1';
5529                         } else {
5530                                 if ($patch_max > 0) {
5531                                         push @commit_spec, "-$patch_max";
5532                                 }
5533                                 push @commit_spec, "-n";
5534                         }
5535                         push @commit_spec, '--root', $hash;
5536                 }
5537                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5538                         '--stdout', @commit_spec
5539                         or die_error(500, "Open git-format-patch failed");
5540         } else {
5541                 die_error(400, "Unknown commitdiff format");
5542         }
5543
5544         # non-textual hash id's can be cached
5545         my $expires;
5546         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5547                 $expires = "+1d";
5548         }
5549
5550         # write commit message
5551         if ($format eq 'html') {
5552                 my $refs = git_get_references();
5553                 my $ref = format_ref_marker($refs, $co{'id'});
5554
5555                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5556                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5557                 git_print_authorship(\%co);
5558                 print "<div class=\"page_body\">\n";
5559                 if (@{$co{'comment'}} > 1) {
5560                         print "<div class=\"log\">\n";
5561                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5562                         print "</div>\n"; # class="log"
5563                 }
5564
5565         } elsif ($format eq 'plain') {
5566                 my $refs = git_get_references("tags");
5567                 my $tagname = git_get_rev_name_tags($hash);
5568                 my $filename = basename($project) . "-$hash.patch";
5569
5570                 print $cgi->header(
5571                         -type => 'text/plain',
5572                         -charset => 'utf-8',
5573                         -expires => $expires,
5574                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5575                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5576                 print "From: " . to_utf8($co{'author'}) . "\n";
5577                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5578                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5579
5580                 print "X-Git-Tag: $tagname\n" if $tagname;
5581                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5582
5583                 foreach my $line (@{$co{'comment'}}) {
5584                         print to_utf8($line) . "\n";
5585                 }
5586                 print "---\n\n";
5587         } elsif ($format eq 'patch') {
5588                 my $filename = basename($project) . "-$hash.patch";
5589
5590                 print $cgi->header(
5591                         -type => 'text/plain',
5592                         -charset => 'utf-8',
5593                         -expires => $expires,
5594                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5595         }
5596
5597         # write patch
5598         if ($format eq 'html') {
5599                 my $use_parents = !defined $hash_parent ||
5600                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5601                 git_difftree_body(\@difftree, $hash,
5602                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5603                 print "<br/>\n";
5604
5605                 git_patchset_body($fd, \@difftree, $hash,
5606                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5607                 close $fd;
5608                 print "</div>\n"; # class="page_body"
5609
5610         } elsif ($format eq 'plain') {
5611                 local $/ = undef;
5612                 print <$fd>;
5613                 close $fd
5614                         or print "Reading git-diff-tree failed\n";
5615         } elsif ($format eq 'patch') {
5616                 local $/ = undef;
5617                 print <$fd>;
5618                 close $fd
5619                         or print "Reading git-format-patch failed\n";
5620         }
5621 }
5622
5623 sub git_commitdiff_plain {
5624         git_commitdiff(-format => 'plain');
5625 }
5626
5627 # format-patch-style patches
5628 sub git_patch {
5629         git_commitdiff(-format => 'patch', -single=> 1);
5630 }
5631
5632 sub git_patches {
5633         git_commitdiff(-format => 'patch');
5634 }
5635
5636 sub git_history {
5637         if (!defined $hash_base) {
5638                 $hash_base = git_get_head_hash($project);
5639         }
5640         if (!defined $page) {
5641                 $page = 0;
5642         }
5643         my $ftype;
5644         my %co = parse_commit($hash_base)
5645             or die_error(404, "Unknown commit object");
5646
5647         my $refs = git_get_references();
5648         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5649
5650         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5651                                        $file_name, "--full-history")
5652             or die_error(404, "No such file or directory on given branch");
5653
5654         if (!defined $hash && defined $file_name) {
5655                 # some commits could have deleted file in question,
5656                 # and not have it in tree, but one of them has to have it
5657                 for (my $i = 0; $i <= @commitlist; $i++) {
5658                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5659                         last if defined $hash;
5660                 }
5661         }
5662         if (defined $hash) {
5663                 $ftype = git_get_type($hash);
5664         }
5665         if (!defined $ftype) {
5666                 die_error(500, "Unknown type of object");
5667         }
5668
5669         my $paging_nav = '';
5670         if ($page > 0) {
5671                 $paging_nav .=
5672                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5673                                                file_name=>$file_name)},
5674                                 "first");
5675                 $paging_nav .= " &sdot; " .
5676                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5677                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5678         } else {
5679                 $paging_nav .= "first";
5680                 $paging_nav .= " &sdot; prev";
5681         }
5682         my $next_link = '';
5683         if ($#commitlist >= 100) {
5684                 $next_link =
5685                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5686                                  -accesskey => "n", -title => "Alt-n"}, "next");
5687                 $paging_nav .= " &sdot; $next_link";
5688         } else {
5689                 $paging_nav .= " &sdot; next";
5690         }
5691
5692         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5693         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5694         git_print_page_path($file_name, $ftype, $hash_base);
5695
5696         git_history_body(\@commitlist, 0, 99,
5697                          $refs, $hash_base, $ftype, $next_link);
5698
5699 }
5700
5701 sub git_search {
5702         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5703         if (!defined $searchtext) {
5704                 die_error(400, "Text field is empty");
5705         }
5706         if (!defined $hash) {
5707                 $hash = git_get_head_hash($project);
5708         }
5709         my %co = parse_commit($hash);
5710         if (!%co) {
5711                 die_error(404, "Unknown commit object");
5712         }
5713         if (!defined $page) {
5714                 $page = 0;
5715         }
5716
5717         $searchtype ||= 'commit';
5718         if ($searchtype eq 'pickaxe') {
5719                 # pickaxe may take all resources of your box and run for several minutes
5720                 # with every query - so decide by yourself how public you make this feature
5721                 gitweb_check_feature('pickaxe')
5722                     or die_error(403, "Pickaxe is disabled");
5723         }
5724         if ($searchtype eq 'grep') {
5725                 gitweb_check_feature('grep')
5726                     or die_error(403, "Grep is disabled");
5727         }
5728
5729
5730         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5731                 my $greptype;
5732                 if ($searchtype eq 'commit') {
5733                         $greptype = "--grep=";
5734                 } elsif ($searchtype eq 'author') {
5735                         $greptype = "--author=";
5736                 } elsif ($searchtype eq 'committer') {
5737                         $greptype = "--committer=";
5738                 }
5739                 $greptype .= $searchtext;
5740                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5741                                                $greptype, '--regexp-ignore-case',
5742                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5743
5744                 my $paging_nav = '';
5745                 if ($page > 0) {
5746                         $paging_nav .=
5747                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5748                                                        searchtext=>$searchtext,
5749                                                        searchtype=>$searchtype)},
5750                                         "first");
5751                         $paging_nav .= " &sdot; " .
5752                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5753                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5754                 } else {
5755                         $paging_nav .= "first";
5756                         $paging_nav .= " &sdot; prev";
5757                 }
5758                 my $next_link = '';
5759                 if ($#commitlist >= 100) {
5760                         $next_link =
5761                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5762                                          -accesskey => "n", -title => "Alt-n"}, "next");
5763                         $paging_nav .= " &sdot; $next_link";
5764                 } else {
5765                         $paging_nav .= " &sdot; next";
5766                 }
5767
5768                 if ($#commitlist >= 100) {
5769                 }
5770
5771                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5772                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5773                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5774         }
5775
5776         if ($searchtype eq 'pickaxe') {
5777                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5778                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5779
5780                 print "<table class=\"pickaxe search\">\n";
5781                 my $alternate = 1;
5782                 $/ = "\n";
5783                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5784                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5785                         ($search_use_regexp ? '--pickaxe-regex' : ());
5786                 undef %co;
5787                 my @files;
5788                 while (my $line = <$fd>) {
5789                         chomp $line;
5790                         next unless $line;
5791
5792                         my %set = parse_difftree_raw_line($line);
5793                         if (defined $set{'commit'}) {
5794                                 # finish previous commit
5795                                 if (%co) {
5796                                         print "</td>\n" .
5797                                               "<td class=\"link\">" .
5798                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5799                                               " | " .
5800                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5801                                         print "</td>\n" .
5802                                               "</tr>\n";
5803                                 }
5804
5805                                 if ($alternate) {
5806                                         print "<tr class=\"dark\">\n";
5807                                 } else {
5808                                         print "<tr class=\"light\">\n";
5809                                 }
5810                                 $alternate ^= 1;
5811                                 %co = parse_commit($set{'commit'});
5812                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5813                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5814                                       "<td><i>$author</i></td>\n" .
5815                                       "<td>" .
5816                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5817                                               -class => "list subject"},
5818                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5819                         } elsif (defined $set{'to_id'}) {
5820                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5821
5822                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5823                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5824                                               -class => "list"},
5825                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5826                                       "<br/>\n";
5827                         }
5828                 }
5829                 close $fd;
5830
5831                 # finish last commit (warning: repetition!)
5832                 if (%co) {
5833                         print "</td>\n" .
5834                               "<td class=\"link\">" .
5835                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5836                               " | " .
5837                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5838                         print "</td>\n" .
5839                               "</tr>\n";
5840                 }
5841
5842                 print "</table>\n";
5843         }
5844
5845         if ($searchtype eq 'grep') {
5846                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5847                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5848
5849                 print "<table class=\"grep_search\">\n";
5850                 my $alternate = 1;
5851                 my $matches = 0;
5852                 $/ = "\n";
5853                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5854                         $search_use_regexp ? ('-E', '-i') : '-F',
5855                         $searchtext, $co{'tree'};
5856                 my $lastfile = '';
5857                 while (my $line = <$fd>) {
5858                         chomp $line;
5859                         my ($file, $lno, $ltext, $binary);
5860                         last if ($matches++ > 1000);
5861                         if ($line =~ /^Binary file (.+) matches$/) {
5862                                 $file = $1;
5863                                 $binary = 1;
5864                         } else {
5865                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5866                         }
5867                         if ($file ne $lastfile) {
5868                                 $lastfile and print "</td></tr>\n";
5869                                 if ($alternate++) {
5870                                         print "<tr class=\"dark\">\n";
5871                                 } else {
5872                                         print "<tr class=\"light\">\n";
5873                                 }
5874                                 print "<td class=\"list\">".
5875                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5876                                                                file_name=>"$file"),
5877                                                 -class => "list"}, esc_path($file));
5878                                 print "</td><td>\n";
5879                                 $lastfile = $file;
5880                         }
5881                         if ($binary) {
5882                                 print "<div class=\"binary\">Binary file</div>\n";
5883                         } else {
5884                                 $ltext = untabify($ltext);
5885                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5886                                         $ltext = esc_html($1, -nbsp=>1);
5887                                         $ltext .= '<span class="match">';
5888                                         $ltext .= esc_html($2, -nbsp=>1);
5889                                         $ltext .= '</span>';
5890                                         $ltext .= esc_html($3, -nbsp=>1);
5891                                 } else {
5892                                         $ltext = esc_html($ltext, -nbsp=>1);
5893                                 }
5894                                 print "<div class=\"pre\">" .
5895                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5896                                                                file_name=>"$file").'#l'.$lno,
5897                                                 -class => "linenr"}, sprintf('%4i', $lno))
5898                                         . ' ' .  $ltext . "</div>\n";
5899                         }
5900                 }
5901                 if ($lastfile) {
5902                         print "</td></tr>\n";
5903                         if ($matches > 1000) {
5904                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5905                         }
5906                 } else {
5907                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5908                 }
5909                 close $fd;
5910
5911                 print "</table>\n";
5912         }
5913 }
5914
5915 sub git_search_help {
5916         git_print_page_nav('','', $hash,$hash,$hash);
5917         print <<EOT;
5918 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5919 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5920 the pattern entered is recognized as the POSIX extended
5921 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5922 insensitive).</p>
5923 <dl>
5924 <dt><b>commit</b></dt>
5925 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5926 EOT
5927         my $have_grep = gitweb_check_feature('grep');
5928         if ($have_grep) {
5929                 print <<EOT;
5930 <dt><b>grep</b></dt>
5931 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5932     a different one) are searched for the given pattern. On large trees, this search can take
5933 a while and put some strain on the server, so please use it with some consideration. Note that
5934 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5935 case-sensitive.</dd>
5936 EOT
5937         }
5938         print <<EOT;
5939 <dt><b>author</b></dt>
5940 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5941 <dt><b>committer</b></dt>
5942 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5943 EOT
5944         my $have_pickaxe = gitweb_check_feature('pickaxe');
5945         if ($have_pickaxe) {
5946                 print <<EOT;
5947 <dt><b>pickaxe</b></dt>
5948 <dd>All commits that caused the string to appear or disappear from any file (changes that
5949 added, removed or "modified" the string) will be listed. This search can take a while and
5950 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5951 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5952 EOT
5953         }
5954         print "</dl>\n";
5955 }
5956
5957 sub git_shortlog {
5958         my $head = git_get_head_hash($project);
5959         if (!defined $hash) {
5960                 $hash = $head;
5961         }
5962         if (!defined $page) {
5963                 $page = 0;
5964         }
5965         my $refs = git_get_references();
5966
5967         my $commit_hash = $hash;
5968         if (defined $hash_parent) {
5969                 $commit_hash = "$hash_parent..$hash";
5970         }
5971         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5972
5973         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5974         my $next_link = '';
5975         if ($#commitlist >= 100) {
5976                 $next_link =
5977                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5978                                  -accesskey => "n", -title => "Alt-n"}, "next");
5979         }
5980         my $patch_max = gitweb_check_feature('patches');
5981         if ($patch_max) {
5982                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5983                         $paging_nav .= " &sdot; " .
5984                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5985                                         "patches");
5986                 }
5987         }
5988
5989         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5990         git_print_header_div('summary', $project);
5991
5992         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5993
5994 }
5995
5996 ## ......................................................................
5997 ## feeds (RSS, Atom; OPML)
5998
5999 # XXX This does header stuff which may not play nice with Catalyst, so likely
6000 # broken in some/many ways.
6001 sub git_feed {
6002         my $format = shift || 'atom';
6003         my $have_blame = gitweb_check_feature('blame');
6004
6005         # Atom: http://www.atomenabled.org/developers/syndication/
6006         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6007         if ($format ne 'rss' && $format ne 'atom') {
6008                 die_error(400, "Unknown web feed format");
6009         }
6010
6011         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6012         my $head = $hash || 'HEAD';
6013         my @commitlist = parse_commits($head, 150, 0, $file_name);
6014
6015         my %latest_commit;
6016         my %latest_date;
6017         my $content_type = "application/$format+xml";
6018         if (defined $cgi->http('HTTP_ACCEPT') &&
6019                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6020                 # browser (feed reader) prefers text/xml
6021                 $content_type = 'text/xml';
6022         }
6023         if (defined($commitlist[0])) {
6024                 %latest_commit = %{$commitlist[0]};
6025                 my $latest_epoch = $latest_commit{'committer_epoch'};
6026                 %latest_date   = parse_date($latest_epoch);
6027                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6028                 if (defined $if_modified) {
6029                         my $since;
6030                         if (eval { require HTTP::Date; 1; }) {
6031                                 $since = HTTP::Date::str2time($if_modified);
6032                         } elsif (eval { require Time::ParseDate; 1; }) {
6033                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6034                         }
6035                         if (defined $since && $latest_epoch <= $since) {
6036                                 print $cgi->header(
6037                                         -type => $content_type,
6038                                         -charset => 'utf-8',
6039                                         -last_modified => $latest_date{'rfc2822'},
6040                                         -status => '304 Not Modified');
6041                                 return;
6042                         }
6043                 }
6044                 print $cgi->header(
6045                         -type => $content_type,
6046                         -charset => 'utf-8',
6047                         -last_modified => $latest_date{'rfc2822'});
6048         } else {
6049                 print $cgi->header(
6050                         -type => $content_type,
6051                         -charset => 'utf-8');
6052         }
6053
6054         # Optimization: skip generating the body if client asks only
6055         # for Last-Modified date.
6056         return if ($cgi->request_method() eq 'HEAD');
6057
6058         # header variables
6059         my $title = "$site_name - $project/$action";
6060         my $feed_type = 'log';
6061         if (defined $hash) {
6062                 $title .= " - '$hash'";
6063                 $feed_type = 'branch log';
6064                 if (defined $file_name) {
6065                         $title .= " :: $file_name";
6066                         $feed_type = 'history';
6067                 }
6068         } elsif (defined $file_name) {
6069                 $title .= " - $file_name";
6070                 $feed_type = 'history';
6071         }
6072         $title .= " $feed_type";
6073         my $descr = git_get_project_description($project);
6074         if (defined $descr) {
6075                 $descr = esc_html($descr);
6076         } else {
6077                 $descr = "$project " .
6078                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6079                          " feed";
6080         }
6081         my $owner = git_get_project_owner($project);
6082         $owner = esc_html($owner);
6083
6084         #header
6085         my $alt_url;
6086         if (defined $file_name) {
6087                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6088         } elsif (defined $hash) {
6089                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6090         } else {
6091                 $alt_url = href(-full=>1, action=>"summary");
6092         }
6093         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6094         if ($format eq 'rss') {
6095                 print <<XML;
6096 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6097 <channel>
6098 XML
6099                 print "<title>$title</title>\n" .
6100                       "<link>$alt_url</link>\n" .
6101                       "<description>$descr</description>\n" .
6102                       "<language>en</language>\n" .
6103                       # project owner is responsible for 'editorial' content
6104                       "<managingEditor>$owner</managingEditor>\n";
6105                 if (defined $logo || defined $favicon) {
6106                         # prefer the logo to the favicon, since RSS
6107                         # doesn't allow both
6108                         my $img = esc_url($logo || $favicon);
6109                         print "<image>\n" .
6110                               "<url>$img</url>\n" .
6111                               "<title>$title</title>\n" .
6112                               "<link>$alt_url</link>\n" .
6113                               "</image>\n";
6114                 }
6115                 if (%latest_date) {
6116                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6117                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6118                 }
6119                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6120         } elsif ($format eq 'atom') {
6121                 print <<XML;
6122 <feed xmlns="http://www.w3.org/2005/Atom">
6123 XML
6124                 print "<title>$title</title>\n" .
6125                       "<subtitle>$descr</subtitle>\n" .
6126                       '<link rel="alternate" type="text/html" href="' .
6127                       $alt_url . '" />' . "\n" .
6128                       '<link rel="self" type="' . $content_type . '" href="' .
6129                       $cgi->self_url() . '" />' . "\n" .
6130                       "<id>" . href(-full=>1) . "</id>\n" .
6131                       # use project owner for feed author
6132                       "<author><name>$owner</name></author>\n";
6133                 if (defined $favicon) {
6134                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6135                 }
6136                 if (defined $logo_url) {
6137                         # not twice as wide as tall: 72 x 27 pixels
6138                         print "<logo>" . esc_url($logo) . "</logo>\n";
6139                 }
6140                 if (! %latest_date) {
6141                         # dummy date to keep the feed valid until commits trickle in:
6142                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6143                 } else {
6144                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6145                 }
6146                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6147         }
6148
6149         # contents
6150         for (my $i = 0; $i <= $#commitlist; $i++) {
6151                 my %co = %{$commitlist[$i]};
6152                 my $commit = $co{'id'};
6153                 # we read 150, we always show 30 and the ones more recent than 48 hours
6154                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6155                         last;
6156                 }
6157                 my %cd = parse_date($co{'author_epoch'});
6158
6159                 # get list of changed files
6160                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6161                         $co{'parent'} || "--root",
6162                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6163                         or next;
6164                 my @difftree = map { chomp; $_ } <$fd>;
6165                 close $fd
6166                         or next;
6167
6168                 # print element (entry, item)
6169                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6170                 if ($format eq 'rss') {
6171                         print "<item>\n" .
6172                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6173                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6174                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6175                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6176                               "<link>$co_url</link>\n" .
6177                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6178                               "<content:encoded>" .
6179                               "<![CDATA[\n";
6180                 } elsif ($format eq 'atom') {
6181                         print "<entry>\n" .
6182                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6183                               "<updated>$cd{'iso-8601'}</updated>\n" .
6184                               "<author>\n" .
6185                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6186                         if ($co{'author_email'}) {
6187                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6188                         }
6189                         print "</author>\n" .
6190                               # use committer for contributor
6191                               "<contributor>\n" .
6192                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6193                         if ($co{'committer_email'}) {
6194                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6195                         }
6196                         print "</contributor>\n" .
6197                               "<published>$cd{'iso-8601'}</published>\n" .
6198                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6199                               "<id>$co_url</id>\n" .
6200                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6201                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6202                 }
6203                 my $comment = $co{'comment'};
6204                 print "<pre>\n";
6205                 foreach my $line (@$comment) {
6206                         $line = esc_html($line);
6207                         print "$line\n";
6208                 }
6209                 print "</pre><ul>\n";
6210                 foreach my $difftree_line (@difftree) {
6211                         my %difftree = parse_difftree_raw_line($difftree_line);
6212                         next if !$difftree{'from_id'};
6213
6214                         my $file = $difftree{'file'} || $difftree{'to_file'};
6215
6216                         print "<li>" .
6217                               "[" .
6218                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6219                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6220                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6221                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6222                                       -title => "diff"}, 'D');
6223                         if ($have_blame) {
6224                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6225                                                              file_name=>$file, hash_base=>$commit),
6226                                               -title => "blame"}, 'B');
6227                         }
6228                         # if this is not a feed of a file history
6229                         if (!defined $file_name || $file_name ne $file) {
6230                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6231                                                              file_name=>$file, hash=>$commit),
6232                                               -title => "history"}, 'H');
6233                         }
6234                         $file = esc_path($file);
6235                         print "] ".
6236                               "$file</li>\n";
6237                 }
6238                 if ($format eq 'rss') {
6239                         print "</ul>]]>\n" .
6240                               "</content:encoded>\n" .
6241                               "</item>\n";
6242                 } elsif ($format eq 'atom') {
6243                         print "</ul>\n</div>\n" .
6244                               "</content>\n" .
6245                               "</entry>\n";
6246                 }
6247         }
6248
6249         # end of feed
6250         if ($format eq 'rss') {
6251                 print "</channel>\n</rss>\n";
6252         }       elsif ($format eq 'atom') {
6253                 print "</feed>\n";
6254         }
6255 }
6256
6257 sub git_rss {
6258         git_feed('rss');
6259 }
6260
6261 sub git_atom {
6262         git_feed('atom');
6263 }
6264
6265 sub git_opml {
6266         my @list = git_get_projects_list();
6267
6268         print $cgi->header(
6269                 -type => 'text/xml',
6270                 -charset => 'utf-8',
6271                 -content_disposition => 'inline; filename="opml.xml"');
6272
6273         print <<XML;
6274 <?xml version="1.0" encoding="utf-8"?>
6275 <opml version="1.0">
6276 <head>
6277   <title>$site_name OPML Export</title>
6278 </head>
6279 <body>
6280 <outline text="git RSS feeds">
6281 XML
6282
6283         foreach my $pr (@list) {
6284                 my %proj = %$pr;
6285                 my $head = git_get_head_hash($proj{'path'});
6286                 if (!defined $head) {
6287                         next;
6288                 }
6289                 $git_dir = "$projectroot/$proj{'path'}";
6290                 my %co = parse_commit($head);
6291                 if (!%co) {
6292                         next;
6293                 }
6294
6295                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6296                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6297                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6298                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6299         }
6300         print <<XML;
6301 </outline>
6302 </body>
6303 </opml>
6304 XML
6305 }
6306
6307 1;