gitweb: Finish restoring "blob" links in git_difftree_body
[gitweb.git] / gitweb / gitweb.perl
index 10e803a97fa411ad014fbe476e55ec83d2e9f6b6..ce185d9037e3e53bca3dd2ce0d960e6e2eb5a4a0 100755 (executable)
 
 # name of your site or organization to appear in page titles
 # replace this with something more descriptive for clearer bookmarks
-our $site_name = "++GITWEB_SITENAME++" || $ENV{'SERVER_NAME'} || "Untitled";
+our $site_name = "++GITWEB_SITENAME++"
+                 || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
 
+# filename of html text to include at top of each page
+our $site_header = "++GITWEB_SITE_HEADER++";
 # html text to include at home page
 our $home_text = "++GITWEB_HOMETEXT++";
-
-# URI of default stylesheet
-our $stylesheet = "++GITWEB_CSS++";
-# URI of GIT logo
+# filename of html text to include at bottom of each page
+our $site_footer = "++GITWEB_SITE_FOOTER++";
+
+# URI of stylesheets
+our @stylesheets = ("++GITWEB_CSS++");
+# URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
+our $stylesheet = undef;
+# URI of GIT logo (72x27 size)
 our $logo = "++GITWEB_LOGO++";
 # URI of GIT favicon, assumed to be image/png type
 our $favicon = "++GITWEB_FAVICON++";
 
+# URI and label (title) of GIT logo link
+#our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
+#our $logo_label = "git documentation";
+our $logo_url = "http://git.or.cz/";
+our $logo_label = "git homepage";
+
 # source of projects list
 our $projects_list = "++GITWEB_LIST++";
 
@@ -63,7 +76,7 @@
 
 # list of git base URLs used for URL to where fetch project from,
 # i.e. full URL is "$git_base_url/$project"
-our @git_base_url_list = ("++GITWEB_BASE_URL++");
+our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 
 # default blob_plain mimetype and default charset for text/plain blob
 our $default_blob_plain_mimetype = 'text/plain';
        #
        # use gitweb_check_feature(<feature>) to check if <feature> is enabled
 
+       # Enable the 'blame' blob view, showing the last commit that modified
+       # each line in the file. This can be very CPU-intensive.
+
+       # To enable system wide have in $GITWEB_CONFIG
+       # $feature{'blame'}{'default'} = [1];
+       # To have project specific config enable override in $GITWEB_CONFIG
+       # $feature{'blame'}{'override'} = 1;
+       # and in project config gitweb.blame = 0|1;
        'blame' => {
                'sub' => \&feature_blame,
                'override' => 0,
                'default' => [0]},
 
+       # Enable the 'snapshot' link, providing a compressed tarball of any
+       # tree. This can potentially generate high traffic if you have large
+       # project.
+
+       # To disable system wide have in $GITWEB_CONFIG
+       # $feature{'snapshot'}{'default'} = [undef];
+       # To have project specific config enable override in $GITWEB_CONFIG
+       # $feature{'blame'}{'override'} = 1;
+       # and in project config gitweb.snapshot = none|gzip|bzip2;
        'snapshot' => {
                'sub' => \&feature_snapshot,
                'override' => 0,
                #         => [content-encoding, suffix, program]
                'default' => ['x-gzip', 'gz', 'gzip']},
 
+       # Enable the pickaxe search, which will list the commits that modified
+       # a given string in a file. This can be practical and quite faster
+       # alternative to 'blame', but still potentially CPU-intensive.
+
+       # To enable system wide have in $GITWEB_CONFIG
+       # $feature{'pickaxe'}{'default'} = [1];
+       # To have project specific config enable override in $GITWEB_CONFIG
+       # $feature{'pickaxe'}{'override'} = 1;
+       # and in project config gitweb.pickaxe = 0|1;
        'pickaxe' => {
                'sub' => \&feature_pickaxe,
                'override' => 0,
                'default' => [1]},
 
+       # Make gitweb use an alternative format of the URLs which can be
+       # more readable and natural-looking: project name is embedded
+       # directly in the path and the query string contains other
+       # auxiliary information. All gitweb installations recognize
+       # URL in either format; this configures in which formats gitweb
+       # generates links.
+
+       # To enable system wide have in $GITWEB_CONFIG
+       # $feature{'pathinfo'}{'default'} = [1];
+       # Project specific override is not supported.
+
+       # Note that you will need to change the default location of CSS,
+       # favicon, logo and possibly other files to an absolute URL. Also,
+       # if gitweb.cgi serves as your indexfile, you will need to force
+       # $my_uri to contain the script name in your $GITWEB_CONFIG.
        'pathinfo' => {
                'override' => 0,
                'default' => [0]},
+
+       # Make gitweb consider projects in project root subdirectories
+       # to be forks of existing projects. Given project $projname.git,
+       # projects matching $projname/*.git will not be shown in the main
+       # projects list, instead a '+' mark will be added to $projname
+       # there and a 'forks' view will be enabled for the project, listing
+       # all the forks. This feature is supported only if project list
+       # is taken from a directory, not file.
+
+       # To enable system wide have in $GITWEB_CONFIG
+       # $feature{'forks'}{'default'} = [1];
+       # Project specific override is not supported.
+       'forks' => {
+               'override' => 0,
+               'default' => [0]},
 );
 
 sub gitweb_check_feature {
@@ -116,15 +185,13 @@ sub gitweb_check_feature {
                $feature{$name}{'override'},
                @{$feature{$name}{'default'}});
        if (!$override) { return @defaults; }
+       if (!defined $sub) {
+               warn "feature $name is not overrideable";
+               return @defaults;
+       }
        return $sub->(@defaults);
 }
 
-# To enable system wide have in $GITWEB_CONFIG
-# $feature{'blame'}{'default'} = [1];
-# To have project specific config enable override in $GITWEB_CONFIG
-# $feature{'blame'}{'override'} = 1;
-# and in project config gitweb.blame = 0|1;
-
 sub feature_blame {
        my ($val) = git_get_project_config('blame', '--bool');
 
@@ -137,12 +204,6 @@ sub feature_blame {
        return $_[0];
 }
 
-# To disable system wide have in $GITWEB_CONFIG
-# $feature{'snapshot'}{'default'} = [undef];
-# To have project specific config enable override in $GITWEB_CONFIG
-# $feature{'blame'}{'override'} = 1;
-# and in project config  gitweb.snapshot = none|gzip|bzip2
-
 sub feature_snapshot {
        my ($ctype, $suffix, $command) = @_;
 
@@ -166,12 +227,6 @@ sub gitweb_have_snapshot {
        return $have_snapshot;
 }
 
-# To enable system wide have in $GITWEB_CONFIG
-# $feature{'pickaxe'}{'default'} = [1];
-# To have project specific config enable override in $GITWEB_CONFIG
-# $feature{'pickaxe'}{'override'} = 1;
-# and in project config gitweb.pickaxe = 0|1;
-
 sub feature_pickaxe {
        my ($val) = git_get_project_config('pickaxe', '--bool');
 
@@ -184,6 +239,22 @@ sub feature_pickaxe {
        return ($_[0]);
 }
 
+# checking HEAD file with -e is fragile if the repository was
+# initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
+# and then pruned.
+sub check_head_link {
+       my ($dir) = @_;
+       my $headfile = "$dir/HEAD";
+       return ((-e $headfile) ||
+               (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
+}
+
+sub check_export_ok {
+       my ($dir) = @_;
+       return (check_head_link($dir) &&
+               (!$export_ok || -e "$dir/$export_ok"));
+}
+
 # rename detection options for git-diff and git-diff-tree
 # - default is '-M', with the cost proportional to
 #   (number of removed files) * (number of new files).
@@ -216,7 +287,7 @@ sub feature_pickaxe {
 if (defined $project) {
        if (!validate_pathname($project) ||
            !(-d "$projectroot/$project") ||
-           !(-e "$projectroot/$project/HEAD") ||
+           !check_head_link("$projectroot/$project") ||
            ($export_ok && !(-e "$projectroot/$project/$export_ok")) ||
            ($strict_export && !project_in_list($project))) {
                undef $project;
@@ -283,6 +354,13 @@ sub feature_pickaxe {
        $searchtext = quotemeta $searchtext;
 }
 
+our $searchtype = $cgi->param('st');
+if (defined $searchtype) {
+       if ($searchtype =~ m/[^a-z]/) {
+               die_error(undef, "Invalid searchtype parameter");
+       }
+}
+
 # now read PATH_INFO and use it as alternative to parameters
 sub evaluate_path_info {
        return if defined $project;
@@ -293,7 +371,7 @@ sub evaluate_path_info {
        # find which part of PATH_INFO is project
        $project = $path_info;
        $project =~ s,/+$,,;
-       while ($project && !-e "$projectroot/$project/HEAD") {
+       while ($project && !check_head_link("$projectroot/$project")) {
                $project =~ s,/*[^/]*$,,;
        }
        # validate project
@@ -342,11 +420,14 @@ sub evaluate_path_info {
        "commitdiff" => \&git_commitdiff,
        "commitdiff_plain" => \&git_commitdiff_plain,
        "commit" => \&git_commit,
+       "forks" => \&git_forks,
        "heads" => \&git_heads,
        "history" => \&git_history,
        "log" => \&git_log,
        "rss" => \&git_rss,
+       "atom" => \&git_atom,
        "search" => \&git_search,
+       "search_help" => \&git_search_help,
        "shortlog" => \&git_shortlog,
        "summary" => \&git_summary,
        "tag" => \&git_tag,
@@ -379,7 +460,11 @@ sub evaluate_path_info {
 
 sub href(%) {
        my %params = @_;
-       my $href = $my_uri;
+       # default is to use -absolute url() i.e. $my_uri
+       my $href = $params{-full} ? $my_url : $my_uri;
+
+       # XXX: Warning: If you touch this, check the search form for updating,
+       # too.
 
        my @mapping = (
                project => "p",
@@ -393,6 +478,7 @@ (%)
                page => "pg",
                order => "o",
                searchtext => "s",
+               searchtype => "st",
        );
        my %mapping = @mapping;
 
@@ -460,6 +546,12 @@ sub validate_refname {
        return $input;
 }
 
+# very thin wrapper for decode("utf8", $str, Encode::FB_DEFAULT);
+sub to_utf8 {
+       my $str = shift;
+       return decode("utf8", $str, Encode::FB_DEFAULT);
+}
+
 # quote unsafe chars, but keep the slash, even when it's not
 # correct, but quoted slashes look too horrible in bookmarks
 sub esc_param {
@@ -480,20 +572,87 @@ sub esc_url {
 }
 
 # replace invalid utf8 character with SUBSTITUTION sequence
-sub esc_html {
+sub esc_html ($;%) {
        my $str = shift;
-       $str = decode("utf8", $str, Encode::FB_DEFAULT);
+       my %opts = @_;
+
+       $str = to_utf8($str);
        $str = escapeHTML($str);
-       $str =~ s/\014/^L/g; # escape FORM FEED (FF) character (e.g. in COPYING file)
+       if ($opts{'-nbsp'}) {
+               $str =~ s/ /&nbsp;/g;
+       }
+       $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
+       return $str;
+}
+
+# Make control characterss "printable".
+sub quot_cec {
+       my $cntrl = shift;
+       my %es = ( # character escape codes, aka escape sequences
+                  "\t" => '\t',   # tab            (HT)
+                  "\n" => '\n',   # line feed      (LF)
+                  "\r" => '\r',   # carrige return (CR)
+                  "\f" => '\f',   # form feed      (FF)
+                  "\b" => '\b',   # backspace      (BS)
+                  "\a" => '\a',   # alarm (bell)   (BEL)
+                  "\e" => '\e',   # escape         (ESC)
+                  "\013" => '\v', # vertical tab   (VT)
+                  "\000" => '\0', # nul character  (NUL)
+                  );
+       my $chr = ( (exists $es{$cntrl})
+                   ? $es{$cntrl}
+                   : sprintf('\%03o', ord($cntrl)) );
+       return "<span class=\"cntrl\">$chr</span>";
+}
+
+# Alternatively use unicode control pictures codepoints.
+sub quot_upr {
+       my $cntrl = shift;
+       my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
+       return "<span class=\"cntrl\">$chr</span>";
+}
+
+# quote control characters and escape filename to HTML
+sub esc_path {
+       my $str = shift;
+
+       $str = esc_html($str);
+       $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
        return $str;
 }
 
 # git may return quoted and escaped filenames
 sub unquote {
        my $str = shift;
+
+       sub unq {
+               my $seq = shift;
+               my %es = ( # character escape codes, aka escape sequences
+                       't' => "\t",   # tab            (HT, TAB)
+                       'n' => "\n",   # newline        (NL)
+                       'r' => "\r",   # return         (CR)
+                       'f' => "\f",   # form feed      (FF)
+                       'b' => "\b",   # backspace      (BS)
+                       'a' => "\a",   # alarm (bell)   (BEL)
+                       'e' => "\e",   # escape         (ESC)
+                       'v' => "\013", # vertical tab   (VT)
+               );
+
+               if ($seq =~ m/^[0-7]{1,3}$/) {
+                       # octal char sequence
+                       return chr(oct($seq));
+               } elsif (exists $es{$seq}) {
+                       # C escape sequence, aka character escape code
+                       return $es{$seq}
+               }
+               # quoted ordinary character
+               return $seq;
+       }
+
        if ($str =~ m/^"(.*)"$/) {
+               # needs unquoting
                $str = $1;
-               $str =~ s/\\([0-7]{1,3})/chr(oct($1))/eg;
+               $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
        }
        return $str;
 }
@@ -627,16 +786,41 @@ sub file_type {
        }
 }
 
+# convert file mode in octal to file type description string
+sub file_type_long {
+       my $mode = shift;
+
+       if ($mode !~ m/^[0-7]+$/) {
+               return $mode;
+       } else {
+               $mode = oct $mode;
+       }
+
+       if (S_ISDIR($mode & S_IFMT)) {
+               return "directory";
+       } elsif (S_ISLNK($mode)) {
+               return "symlink";
+       } elsif (S_ISREG($mode)) {
+               if ($mode & S_IXUSR) {
+                       return "executable";
+               } else {
+                       return "file";
+               };
+       } else {
+               return "unknown";
+       }
+}
+
+
 ## ----------------------------------------------------------------------
 ## functions returning short HTML fragments, or transforming HTML fragments
 ## which don't beling to other sections
 
-# format line of commit message or tag comment
+# format line of commit message.
 sub format_log_line_html {
        my $line = shift;
 
-       $line = esc_html($line);
-       $line =~ s/ /&nbsp;/g;
+       $line = esc_html($line, -nbsp=>1);
        if ($line =~ m/([0-9a-fA-F]{40})/) {
                my $hash_text = $1;
                if (git_get_type($hash_text) eq "commit") {
@@ -684,7 +868,7 @@ sub format_subject_html {
 
        if (length($short) < length($long)) {
                return $cgi->a({-href => $href, -class => "list subject",
-                               -title => decode("utf8", $long, Encode::FB_DEFAULT)},
+                               -title => to_utf8($long)},
                       esc_html($short) . $extra);
        } else {
                return $cgi->a({-href => $href, -class => "list subject"},
@@ -692,8 +876,10 @@ sub format_subject_html {
        }
 }
 
+# format patch (diff) line (rather not to be used for diff headers)
 sub format_diff_line {
        my $line = shift;
+       my ($from, $to) = @_;
        my $char = substr($line, 0, 1);
        my $diff_class = "";
 
@@ -709,7 +895,26 @@ sub format_diff_line {
                $diff_class = " incomplete";
        }
        $line = untabify($line);
-       return "<div class=\"diff$diff_class\">" . esc_html($line) . "</div>\n";
+       if ($from && $to && $line =~ m/^\@{2} /) {
+               my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
+                       $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
+
+               $from_lines = 0 unless defined $from_lines;
+               $to_lines   = 0 unless defined $to_lines;
+
+               if ($from->{'href'}) {
+                       $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
+                                            -class=>"list"}, $from_text);
+               }
+               if ($to->{'href'}) {
+                       $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
+                                            -class=>"list"}, $to_text);
+               }
+               $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
+                       "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
+               return "<div class=\"diff$diff_class\">$line</div>\n";
+       }
+       return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
 }
 
 ## ----------------------------------------------------------------------
@@ -785,7 +990,7 @@ sub git_get_hash_by_path {
        close $fd or return undef;
 
        #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
-       $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/;
+       $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
        if (defined $type && $type ne $2) {
                # type doesn't match
                return undef;
@@ -817,13 +1022,21 @@ sub git_get_project_url_list {
 }
 
 sub git_get_projects_list {
+       my ($filter) = @_;
        my @list;
 
+       $filter ||= '';
+       $filter =~ s/\.git$//;
+
        if (-d $projects_list) {
                # search in directory
-               my $dir = $projects_list;
+               my $dir = $projects_list . ($filter ? "/$filter" : '');
+               # remove the trailing "/"
+               $dir =~ s!/+$!!;
                my $pfxlen = length("$dir");
 
+               my ($check_forks) = gitweb_check_feature('forks');
+
                File::Find::find({
                        follow_fast => 1, # follow symbolic links
                        dangling_symlinks => 0, # ignore dangling symlinks, silently
@@ -835,9 +1048,10 @@ sub git_get_projects_list {
 
                                my $subdir = substr($File::Find::name, $pfxlen + 1);
                                # we check related file in $projectroot
-                               if (-e "$projectroot/$subdir/HEAD" && (!$export_ok ||
-                                   -e "$projectroot/$subdir/$export_ok")) {
-                                       push @list, { path => $subdir };
+                               if ($check_forks and $subdir =~ m#/.#) {
+                                       $File::Find::prune = 1;
+                               } elsif (check_export_ok("$projectroot/$filter/$subdir")) {
+                                       push @list, { path => ($filter ? "$filter/" : '') . $subdir };
                                        $File::Find::prune = 1;
                                }
                        },
@@ -857,11 +1071,21 @@ sub git_get_projects_list {
                        if (!defined $path) {
                                next;
                        }
-                       if (-e "$projectroot/$path/HEAD" && (!$export_ok ||
-                           -e "$projectroot/$path/$export_ok")) {
+                       if ($filter ne '') {
+                               # looking for forks;
+                               my $pfx = substr($path, 0, length($filter));
+                               if ($pfx ne $filter) {
+                                       next;
+                               }
+                               my $sfx = substr($path, length($filter));
+                               if ($sfx !~ /^\/.*\.git$/) {
+                                       next;
+                               }
+                       }
+                       if (check_export_ok("$projectroot/$path")) {
                                my $pr = {
                                        path => $path,
-                                       owner => decode("utf8", $owner, Encode::FB_DEFAULT),
+                                       owner => to_utf8($owner),
                                };
                                push @list, $pr
                        }
@@ -890,7 +1114,7 @@ sub git_get_project_owner {
                        $pr = unescape($pr);
                        $ow = unescape($ow);
                        if ($pr eq $project) {
-                               $owner = decode("utf8", $ow, Encode::FB_DEFAULT);
+                               $owner = to_utf8($ow);
                                last;
                        }
                }
@@ -903,6 +1127,24 @@ sub git_get_project_owner {
        return $owner;
 }
 
+sub git_get_last_activity {
+       my ($path) = @_;
+       my $fd;
+
+       $git_dir = "$projectroot/$path";
+       open($fd, "-|", git_cmd(), 'for-each-ref',
+            '--format=%(refname) %(committer)',
+            '--sort=-committerdate',
+            'refs/heads') or return;
+       my $most_recent = <$fd>;
+       close $fd or return;
+       if ($most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
+               my $timestamp = $1;
+               my $age = time - $timestamp;
+               return ($age, age_string($age));
+       }
+}
+
 sub git_get_references {
        my $type = shift || "";
        my %refs;
@@ -957,10 +1199,12 @@ sub parse_date {
        $date{'mday'} = $mday;
        $date{'day'} = $days[$wday];
        $date{'month'} = $months[$mon];
-       $date{'rfc2822'} = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
-                          $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
+       $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
+                            $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
        $date{'mday-time'} = sprintf "%d %s %02d:%02d",
                             $mday, $months[$mon], $hour ,$min;
+       $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
+                            1900+$year, $mon, $mday, $hour ,$min, $sec;
 
        $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
        my $local = $epoch + ((int $1 + ($2/60)) * 3600);
@@ -968,6 +1212,9 @@ sub parse_date {
        $date{'hour_local'} = $hour;
        $date{'minute_local'} = $min;
        $date{'tz_local'} = $tz;
+       $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
+                                 1900+$year, $mon+1, $mday,
+                                 $hour, $min, $sec, $tz);
        return %date;
 }
 
@@ -1016,12 +1263,13 @@ sub parse_commit {
        if (defined $commit_text) {
                @commit_lines = @$commit_text;
        } else {
-               $/ = "\0";
-               open my $fd, "-|", git_cmd(), "rev-list", "--header", "--parents", "--max-count=1", $commit_id
+               local $/ = "\0";
+               open my $fd, "-|", git_cmd(), "rev-list",
+                       "--header", "--parents", "--max-count=1",
+                       $commit_id, "--"
                        or return;
                @commit_lines = split '\n', <$fd>;
                close $fd or return;
-               $/ = "\n";
                pop @commit_lines;
        }
        my $header = shift @commit_lines;
@@ -1081,6 +1329,9 @@ sub parse_commit {
                        last;
                }
        }
+       if ($co{'title'} eq "") {
+               $co{'title'} = $co{'title_short'} = '(no commit message)';
+       }
        # remove added spaces
        foreach my $line (@commit_lines) {
                $line =~ s/^    //;
@@ -1179,7 +1430,7 @@ ($;%)
        my %res;
 
        #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
-       $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/;
+       $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
 
        $res{'mode'} = $1;
        $res{'type'} = $2;
@@ -1196,47 +1447,88 @@ ($;%)
 ## ......................................................................
 ## parse to array of hashes functions
 
-sub git_get_refs_list {
-       my $type = shift || "";
-       my %refs;
-       my @reflist;
+sub git_get_heads_list {
+       my $limit = shift;
+       my @headslist;
 
-       my @refs;
-       open my $fd, "-|", $GIT, "peek-remote", "$projectroot/$project/"
+       open my $fd, '-|', git_cmd(), 'for-each-ref',
+               ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
+               '--format=%(objectname) %(refname) %(subject)%00%(committer)',
+               'refs/heads'
                or return;
        while (my $line = <$fd>) {
-               chomp $line;
-               if ($line =~ m/^([0-9a-fA-F]{40})\trefs\/($type\/?([^\^]+))(\^\{\})?$/) {
-                       if (defined $refs{$1}) {
-                               push @{$refs{$1}}, $2;
-                       } else {
-                               $refs{$1} = [ $2 ];
-                       }
+               my %ref_item;
 
-                       if (! $4) { # unpeeled, direct reference
-                               push @refs, { hash => $1, name => $3 }; # without type
-                       } elsif ($3 eq $refs[-1]{'name'}) {
-                               # most likely a tag is followed by its peeled
-                               # (deref) one, and when that happens we know the
-                               # previous one was of type 'tag'.
-                               $refs[-1]{'type'} = "tag";
-                       }
+               chomp $line;
+               my ($refinfo, $committerinfo) = split(/\0/, $line);
+               my ($hash, $name, $title) = split(' ', $refinfo, 3);
+               my ($committer, $epoch, $tz) =
+                       ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
+               $name =~ s!^refs/heads/!!;
+
+               $ref_item{'name'}  = $name;
+               $ref_item{'id'}    = $hash;
+               $ref_item{'title'} = $title || '(no commit message)';
+               $ref_item{'epoch'} = $epoch;
+               if ($epoch) {
+                       $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
+               } else {
+                       $ref_item{'age'} = "unknown";
                }
+
+               push @headslist, \%ref_item;
        }
        close $fd;
 
-       foreach my $ref (@refs) {
-               my $ref_file = $ref->{'name'};
-               my $ref_id   = $ref->{'hash'};
+       return wantarray ? @headslist : \@headslist;
+}
+
+sub git_get_tags_list {
+       my $limit = shift;
+       my @tagslist;
+
+       open my $fd, '-|', git_cmd(), 'for-each-ref',
+               ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
+               '--format=%(objectname) %(objecttype) %(refname) '.
+               '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
+               'refs/tags'
+               or return;
+       while (my $line = <$fd>) {
+               my %ref_item;
 
-               my $type = $ref->{'type'} || git_get_type($ref_id) || next;
-               my %ref_item = parse_ref($ref_file, $ref_id, $type);
+               chomp $line;
+               my ($refinfo, $creatorinfo) = split(/\0/, $line);
+               my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
+               my ($creator, $epoch, $tz) =
+                       ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
+               $name =~ s!^refs/tags/!!;
+
+               $ref_item{'type'} = $type;
+               $ref_item{'id'} = $id;
+               $ref_item{'name'} = $name;
+               if ($type eq "tag") {
+                       $ref_item{'subject'} = $title;
+                       $ref_item{'reftype'} = $reftype;
+                       $ref_item{'refid'}   = $refid;
+               } else {
+                       $ref_item{'reftype'} = $type;
+                       $ref_item{'refid'}   = $id;
+               }
+
+               if ($type eq "tag" || $type eq "commit") {
+                       $ref_item{'epoch'} = $epoch;
+                       if ($epoch) {
+                               $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
+                       } else {
+                               $ref_item{'age'} = "unknown";
+                       }
+               }
 
-               push @reflist, \%ref_item;
+               push @tagslist, \%ref_item;
        }
-       # sort refs by age
-       @reflist = sort {$b->{'epoch'} <=> $a->{'epoch'}} @reflist;
-       return (\@reflist, \%refs);
+       close $fd;
+
+       return wantarray ? @tagslist : \@tagslist;
 }
 
 ## ----------------------------------------------------------------------
@@ -1252,7 +1544,7 @@ sub get_file_owner {
        }
        my $owner = $gcos;
        $owner =~ s/[,;].*$//;
-       return decode("utf8", $owner, Encode::FB_DEFAULT);
+       return to_utf8($owner);
 }
 
 ## ......................................................................
@@ -1333,13 +1625,13 @@ sub git_header_html {
        my $status = shift || "200 OK";
        my $expires = shift;
 
-       my $title = "$site_name git";
+       my $title = "$site_name";
        if (defined $project) {
                $title .= " - $project";
                if (defined $action) {
                        $title .= "/$action";
                        if (defined $file_name) {
-                               $title .= " - " . esc_html($file_name);
+                               $title .= " - " . esc_path($file_name);
                                if ($action eq "tree" && $file_name !~ m|/$|) {
                                        $title .= "/";
                                }
@@ -1371,17 +1663,29 @@ sub git_header_html {
 <meta name="generator" content="gitweb/$version git/$git_version"/>
 <meta name="robots" content="index, nofollow"/>
 <title>$title</title>
-<link rel="stylesheet" type="text/css" href="$stylesheet"/>
 EOF
+# print out each stylesheet that exist
+       if (defined $stylesheet) {
+#provides backwards capability for those people who define style sheet in a config file
+               print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
+       } else {
+               foreach my $stylesheet (@stylesheets) {
+                       next unless $stylesheet;
+                       print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
+               }
+       }
        if (defined $project) {
-               printf('<link rel="alternate" title="%s log" '.
-                      'href="%s" type="application/rss+xml"/>'."\n",
+               printf('<link rel="alternate" title="%s log RSS feed" '.
+                      'href="%s" type="application/rss+xml" />'."\n",
                       esc_param($project), href(action=>"rss"));
+               printf('<link rel="alternate" title="%s log Atom feed" '.
+                      'href="%s" type="application/atom+xml" />'."\n",
+                      esc_param($project), href(action=>"atom"));
        } else {
                printf('<link rel="alternate" title="%s projects list" '.
                       'href="%s" type="text/plain; charset=utf-8"/>'."\n",
                       $site_name, href(project=>undef, action=>"project_index"));
-               printf('<link rel="alternate" title="%s projects logs" '.
+               printf('<link rel="alternate" title="%s projects feeds" '.
                       'href="%s" type="text/x-opml"/>'."\n",
                       $site_name, href(project=>undef, action=>"opml"));
        }
@@ -1390,11 +1694,18 @@ sub git_header_html {
        }
 
        print "</head>\n" .
-             "<body>\n" .
-             "<div class=\"page_header\">\n" .
-             "<a href=\"http://www.kernel.org/pub/software/scm/git/docs/\" title=\"git documentation\">" .
-             "<img src=\"$logo\" width=\"72\" height=\"27\" alt=\"git\" style=\"float:right; border-width:0px;\"/>" .
-             "</a>\n";
+             "<body>\n";
+
+       if (-f $site_header) {
+               open (my $fd, $site_header);
+               print <$fd>;
+               close $fd;
+       }
+
+       print "<div class=\"page_header\">\n" .
+             $cgi->a({-href => esc_url($logo_url),
+                      -title => $logo_label},
+                     qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
        print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
        if (defined $project) {
                print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
@@ -1415,11 +1726,16 @@ sub git_header_html {
                }
                $cgi->param("a", "search");
                $cgi->param("h", $search_hash);
+               $cgi->param("p", $project);
                print $cgi->startform(-method => "get", -action => $my_uri) .
                      "<div class=\"search\">\n" .
                      $cgi->hidden(-name => "p") . "\n" .
                      $cgi->hidden(-name => "a") . "\n" .
                      $cgi->hidden(-name => "h") . "\n" .
+                     $cgi->popup_menu(-name => 'st', -default => 'commit',
+                                      -values => ['commit', 'author', 'committer', 'pickaxe']) .
+                     $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
+                     " search:\n",
                      $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
                      "</div>" .
                      $cgi->end_form() . "\n";
@@ -1435,15 +1751,24 @@ sub git_footer_html {
                        print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
                }
                print $cgi->a({-href => href(action=>"rss"),
-                             -class => "rss_logo"}, "RSS") . "\n";
+                             -class => "rss_logo"}, "RSS") . " ";
+               print $cgi->a({-href => href(action=>"atom"),
+                             -class => "rss_logo"}, "Atom") . "\n";
        } else {
                print $cgi->a({-href => href(project=>undef, action=>"opml"),
                              -class => "rss_logo"}, "OPML") . " ";
                print $cgi->a({-href => href(project=>undef, action=>"project_index"),
                              -class => "rss_logo"}, "TXT") . "\n";
        }
-       print "</div>\n" .
-             "</body>\n" .
+       print "</div>\n" ;
+
+       if (-f $site_footer) {
+               open (my $fd, $site_footer);
+               print <$fd>;
+               close $fd;
+       }
+
+       print "</body>\n" .
              "</html>";
 }
 
@@ -1568,37 +1893,37 @@ sub git_print_page_path {
        my $type = shift;
        my $hb = shift;
 
-       if (!defined $name) {
-               print "<div class=\"page_path\">/</div>\n";
-       } else {
+
+       print "<div class=\"page_path\">";
+       print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
+                     -title => 'tree root'}, "[$project]");
+       print " / ";
+       if (defined $name) {
                my @dirname = split '/', $name;
                my $basename = pop @dirname;
                my $fullname = '';
 
-               print "<div class=\"page_path\">";
-               print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
-                             -title => 'tree root'}, "[$project]");
-               print " / ";
                foreach my $dir (@dirname) {
                        $fullname .= ($fullname ? '/' : '') . $dir;
                        print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
                                                     hash_base=>$hb),
-                                     -title => $fullname}, esc_html($dir));
+                                     -title => esc_html($fullname)}, esc_path($dir));
                        print " / ";
                }
                if (defined $type && $type eq 'blob') {
                        print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
                                                     hash_base=>$hb),
-                                     -title => $name}, esc_html($basename));
+                                     -title => esc_html($name)}, esc_path($basename));
                } elsif (defined $type && $type eq 'tree') {
                        print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
                                                     hash_base=>$hb),
-                                     -title => $name}, esc_html($basename));
+                                     -title => esc_html($name)}, esc_path($basename));
+                       print " / ";
                } else {
-                       print esc_html($basename);
+                       print esc_path($basename);
                }
-               print "<br/></div>\n";
        }
+       print "<br/></div>\n";
 }
 
 # sub git_print_log (\@;%) {
@@ -1651,15 +1976,6 @@ ($;%)
        }
 }
 
-sub git_print_simplified_log {
-       my $log = shift;
-       my $remove_title = shift;
-
-       git_print_log($log,
-               -final_empty_line=> 1,
-               -remove_title => $remove_title);
-}
-
 # print tree entry (row of git_tree), but without encompassing <tr> element
 sub git_print_tree_entry {
        my ($t, $basedir, $hash_base, $have_blame) = @_;
@@ -1675,37 +1991,43 @@ sub git_print_tree_entry {
        if ($t->{'type'} eq "blob") {
                print "<td class=\"list\">" .
                        $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
-                                              file_name=>"$basedir$t->{'name'}", %base_key),
-                                -class => "list"}, esc_html($t->{'name'})) . "</td>\n";
+                                              file_name=>"$basedir$t->{'name'}", %base_key),
+                               -class => "list"}, esc_path($t->{'name'})) . "</td>\n";
                print "<td class=\"link\">";
+               print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
+                                            file_name=>"$basedir$t->{'name'}", %base_key)},
+                             "blob");
                if ($have_blame) {
-                       print $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
-                                                    file_name=>"$basedir$t->{'name'}", %base_key)},
-                                     "blame");
+                       print " | " .
+                             $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
+                                                          file_name=>"$basedir$t->{'name'}", %base_key)},
+                                           "blame");
                }
                if (defined $hash_base) {
-                       if ($have_blame) {
-                               print " | ";
-                       }
-                       print $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
+                       print " | " .
+                             $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
                                                     hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
                                      "history");
                }
                print " | " .
                        $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
-                                              file_name=>"$basedir$t->{'name'}")},
-                               "raw");
+                                              file_name=>"$basedir$t->{'name'}")},
+                               "raw");
                print "</td>\n";
 
        } elsif ($t->{'type'} eq "tree") {
                print "<td class=\"list\">";
                print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
                                             file_name=>"$basedir$t->{'name'}", %base_key)},
-                             esc_html($t->{'name'}));
+                             esc_path($t->{'name'}));
                print "</td>\n";
                print "<td class=\"link\">";
+               print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
+                                            file_name=>"$basedir$t->{'name'}", %base_key)},
+                             "tree");
                if (defined $hash_base) {
-                       print $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
+                       print " | " .
+                             $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
                                                     file_name=>"$basedir$t->{'name'}")},
                                      "history");
                }
@@ -1718,7 +2040,7 @@ sub git_print_tree_entry {
 
 sub git_difftree_body {
        my ($difftree, $hash, $parent) = @_;
-
+       my ($have_blame) = gitweb_check_feature('blame');
        print "<div class=\"list_head\">\n";
        if ($#{$difftree} > 10) {
                print(($#{$difftree} + 1) . " files changed:\n");
@@ -1762,7 +2084,7 @@ sub git_difftree_body {
                        print "<td>";
                        print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
                                                     hash_base=>$hash, file_name=>$diff{'file'}),
-                                      -class => "list"}, esc_html($diff{'file'}));
+                                     -class => "list"}, esc_path($diff{'file'}));
                        print "</td>\n";
                        print "<td>$mode_chng</td>\n";
                        print "<td class=\"link\">";
@@ -1770,7 +2092,11 @@ sub git_difftree_body {
                                # link to patch
                                $patchno++;
                                print $cgi->a({-href => "#patch$patchno"}, "patch");
+                               print " | ";
                        }
+                       print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
+                                                    hash_base=>$hash, file_name=>$diff{'file'})},
+                                     "blob") . " | ";
                        print "</td>\n";
 
                } elsif ($diff{'status'} eq "D") { # deleted
@@ -1778,7 +2104,7 @@ sub git_difftree_body {
                        print "<td>";
                        print $cgi->a({-href => href(action=>"blob", hash=>$diff{'from_id'},
                                                     hash_base=>$parent, file_name=>$diff{'file'}),
-                                      -class => "list"}, esc_html($diff{'file'}));
+                                      -class => "list"}, esc_path($diff{'file'}));
                        print "</td>\n";
                        print "<td>$mode_chng</td>\n";
                        print "<td class=\"link\">";
@@ -1788,12 +2114,17 @@ sub git_difftree_body {
                                print $cgi->a({-href => "#patch$patchno"}, "patch");
                                print " | ";
                        }
-                       print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
-                                                    file_name=>$diff{'file'})},
-                                     "blame") . " | ";
+                       print $cgi->a({-href => href(action=>"blob", hash=>$diff{'from_id'},
+                                                    hash_base=>$parent, file_name=>$diff{'file'})},
+                                     "blob") . " | ";
+                       if ($have_blame) {
+                               print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
+                                                            file_name=>$diff{'file'})},
+                                             "blame") . " | ";
+                       }
                        print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
-                                                    file_name=>$diff{'file'})},
-                                     "history");
+                                                    file_name=>$diff{'file'})},
+                                     "history");
                        print "</td>\n";
 
                } elsif ($diff{'status'} eq "M" || $diff{'status'} eq "T") { # modified, or type changed
@@ -1814,31 +2145,36 @@ sub git_difftree_body {
                        }
                        print "<td>";
                        print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
-                                                    hash_base=>$hash, file_name=>$diff{'file'}),
-                                      -class => "list"}, esc_html($diff{'file'}));
+                                                    hash_base=>$hash, file_name=>$diff{'file'}),
+                                     -class => "list"}, esc_path($diff{'file'}));
                        print "</td>\n";
                        print "<td>$mode_chnge</td>\n";
                        print "<td class=\"link\">";
-                       if ($diff{'to_id'} ne $diff{'from_id'}) { # modified
-                               if ($action eq 'commitdiff') {
-                                       # link to patch
-                                       $patchno++;
-                                       print $cgi->a({-href => "#patch$patchno"}, "patch");
-                               } else {
-                                       print $cgi->a({-href => href(action=>"blobdiff",
-                                                                    hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
-                                                                    hash_base=>$hash, hash_parent_base=>$parent,
-                                                                    file_name=>$diff{'file'})},
-                                                     "diff");
-                               }
-                               print " | ";
+                       if ($action eq 'commitdiff') {
+                               # link to patch
+                               $patchno++;
+                               print $cgi->a({-href => "#patch$patchno"}, "patch") .
+                                     " | ";
+                       } elsif ($diff{'to_id'} ne $diff{'from_id'}) {
+                               # "commit" view and modified file (not onlu mode changed)
+                               print $cgi->a({-href => href(action=>"blobdiff",
+                                                            hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
+                                                            hash_base=>$hash, hash_parent_base=>$parent,
+                                                            file_name=>$diff{'file'})},
+                                             "diff") .
+                                     " | ";
+                       }
+                       print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
+                                                    hash_base=>$hash, file_name=>$diff{'file'})},
+                                      "blob") . " | ";
+                       if ($have_blame) {
+                               print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
+                                                            file_name=>$diff{'file'})},
+                                             "blame") . " | ";
                        }
-                       print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
-                                                    file_name=>$diff{'file'})},
-                                     "blame") . " | ";
                        print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
-                                                    file_name=>$diff{'file'})},
-                                     "history");
+                                                    file_name=>$diff{'file'})},
+                                     "history");
                        print "</td>\n";
 
                } elsif ($diff{'status'} eq "R" || $diff{'status'} eq "C") { # renamed or copied
@@ -1852,33 +2188,38 @@ sub git_difftree_body {
                        print "<td>" .
                              $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
                                                     hash=>$diff{'to_id'}, file_name=>$diff{'to_file'}),
-                                     -class => "list"}, esc_html($diff{'to_file'})) . "</td>\n" .
+                                     -class => "list"}, esc_path($diff{'to_file'})) . "</td>\n" .
                              "<td><span class=\"file_status $nstatus\">[$nstatus from " .
                              $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
                                                     hash=>$diff{'from_id'}, file_name=>$diff{'from_file'}),
-                                     -class => "list"}, esc_html($diff{'from_file'})) .
+                                     -class => "list"}, esc_path($diff{'from_file'})) .
                              " with " . (int $diff{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
                              "<td class=\"link\">";
-                       if ($diff{'to_id'} ne $diff{'from_id'}) {
-                               if ($action eq 'commitdiff') {
-                                       # link to patch
-                                       $patchno++;
-                                       print $cgi->a({-href => "#patch$patchno"}, "patch");
-                               } else {
-                                       print $cgi->a({-href => href(action=>"blobdiff",
-                                                                    hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
-                                                                    hash_base=>$hash, hash_parent_base=>$parent,
-                                                                    file_name=>$diff{'to_file'}, file_parent=>$diff{'from_file'})},
-                                                     "diff");
-                               }
-                               print " | ";
+                       if ($action eq 'commitdiff') {
+                               # link to patch
+                               $patchno++;
+                               print $cgi->a({-href => "#patch$patchno"}, "patch") .
+                                     " | ";
+                       } elsif ($diff{'to_id'} ne $diff{'from_id'}) {
+                               # "commit" view and modified file (not only pure rename or copy)
+                               print $cgi->a({-href => href(action=>"blobdiff",
+                                                            hash=>$diff{'to_id'}, hash_parent=>$diff{'from_id'},
+                                                            hash_base=>$hash, hash_parent_base=>$parent,
+                                                            file_name=>$diff{'to_file'}, file_parent=>$diff{'from_file'})},
+                                             "diff") .
+                                     " | ";
                        }
-                       print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
-                                                    file_name=>$diff{'from_file'})},
-                                     "blame") . " | ";
-                       print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
-                                                    file_name=>$diff{'from_file'})},
-                                     "history");
+                       print $cgi->a({-href => href(action=>"blob", hash=>$diff{'to_id'},
+                                                    hash_base=>$parent, file_name=>$diff{'to_file'})},
+                                     "blob") . " | ";
+                       if ($have_blame) {
+                               print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
+                                                            file_name=>$diff{'to_file'})},
+                                             "blame") . " | ";
+                       }
+                       print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
+                                                   file_name=>$diff{'to_file'})},
+                                     "history");
                        print "</td>\n";
 
                } # we should not encounter Unmerged (U) or Unknown (X) status
@@ -1891,127 +2232,313 @@ sub git_patchset_body {
        my ($fd, $difftree, $hash, $hash_parent) = @_;
 
        my $patch_idx = 0;
-       my $in_header = 0;
-       my $patch_found = 0;
+       my $patch_line;
        my $diffinfo;
+       my (%from, %to);
+       my ($from_id, $to_id);
 
        print "<div class=\"patchset\">\n";
 
-       LINE:
-       while (my $patch_line = <$fd>) {
+       # skip to first patch
+       while ($patch_line = <$fd>) {
                chomp $patch_line;
 
-               if ($patch_line =~ m/^diff /) { # "git diff" header
-                       # beginning of patch (in patchset)
-                       if ($patch_found) {
-                               # close previous patch
-                               print "</div>\n"; # class="patch"
-                       } else {
-                               # first patch in patchset
-                               $patch_found = 1;
+               last if ($patch_line =~ m/^diff /);
+       }
+
+ PATCH:
+       while ($patch_line) {
+               my @diff_header;
+
+               # git diff header
+               #assert($patch_line =~ m/^diff /) if DEBUG;
+               #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
+               push @diff_header, $patch_line;
+
+               # extended diff header
+       EXTENDED_HEADER:
+               while ($patch_line = <$fd>) {
+                       chomp $patch_line;
+
+                       last EXTENDED_HEADER if ($patch_line =~ m/^--- /);
+
+                       if ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/) {
+                               $from_id = $1;
+                               $to_id   = $2;
                        }
-                       print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
 
+                       push @diff_header, $patch_line;
+               }
+               #last PATCH unless $patch_line;
+               my $last_patch_line = $patch_line;
+
+               # check if current patch belong to current raw line
+               # and parse raw git-diff line if needed
+               if (defined $diffinfo &&
+                   $diffinfo->{'from_id'} eq $from_id &&
+                   $diffinfo->{'to_id'}   eq $to_id) {
+                       # this is split patch
+                       print "<div class=\"patch cont\">\n";
+               } else {
+                       # advance raw git-diff output if needed
+                       $patch_idx++ if defined $diffinfo;
+
+                       # read and prepare patch information
                        if (ref($difftree->[$patch_idx]) eq "HASH") {
+                               # pre-parsed (or generated by hand)
                                $diffinfo = $difftree->[$patch_idx];
                        } else {
                                $diffinfo = parse_difftree_raw_line($difftree->[$patch_idx]);
                        }
-                       $patch_idx++;
-
-                       # for now, no extended header, hence we skip empty patches
-                       # companion to  next LINE if $in_header;
-                       if ($diffinfo->{'from_id'} eq $diffinfo->{'to_id'}) { # no change
-                               $in_header = 1;
-                               next LINE;
+                       $from{'file'} = $diffinfo->{'from_file'} || $diffinfo->{'file'};
+                       $to{'file'}   = $diffinfo->{'to_file'}   || $diffinfo->{'file'};
+                       if ($diffinfo->{'status'} ne "A") { # not new (added) file
+                               $from{'href'} = href(action=>"blob", hash_base=>$hash_parent,
+                                                    hash=>$diffinfo->{'from_id'},
+                                                    file_name=>$from{'file'});
                        }
-
-                       if ($diffinfo->{'status'} eq "A") { # added
-                               print "<div class=\"diff_info\">" . file_type($diffinfo->{'to_mode'}) . ":" .
-                                     $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
-                                                            hash=>$diffinfo->{'to_id'}, file_name=>$diffinfo->{'file'})},
-                                             $diffinfo->{'to_id'}) . "(new)" .
-                                     "</div>\n"; # class="diff_info"
-
-                       } elsif ($diffinfo->{'status'} eq "D") { # deleted
-                               print "<div class=\"diff_info\">" . file_type($diffinfo->{'from_mode'}) . ":" .
-                                     $cgi->a({-href => href(action=>"blob", hash_base=>$hash_parent,
-                                                            hash=>$diffinfo->{'from_id'}, file_name=>$diffinfo->{'file'})},
-                                             $diffinfo->{'from_id'}) . "(deleted)" .
-                                     "</div>\n"; # class="diff_info"
-
-                       } elsif ($diffinfo->{'status'} eq "R" || # renamed
-                                $diffinfo->{'status'} eq "C" || # copied
-                                $diffinfo->{'status'} eq "2") { # with two filenames (from git_blobdiff)
-                               print "<div class=\"diff_info\">" .
-                                     file_type($diffinfo->{'from_mode'}) . ":" .
-                                     $cgi->a({-href => href(action=>"blob", hash_base=>$hash_parent,
-                                                            hash=>$diffinfo->{'from_id'}, file_name=>$diffinfo->{'from_file'})},
-                                             $diffinfo->{'from_id'}) .
-                                     " -> " .
-                                     file_type($diffinfo->{'to_mode'}) . ":" .
-                                     $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
-                                                            hash=>$diffinfo->{'to_id'}, file_name=>$diffinfo->{'to_file'})},
-                                             $diffinfo->{'to_id'});
-                               print "</div>\n"; # class="diff_info"
-
-                       } else { # modified, mode changed, ...
-                               print "<div class=\"diff_info\">" .
-                                     file_type($diffinfo->{'from_mode'}) . ":" .
-                                     $cgi->a({-href => href(action=>"blob", hash_base=>$hash_parent,
-                                                            hash=>$diffinfo->{'from_id'}, file_name=>$diffinfo->{'file'})},
-                                             $diffinfo->{'from_id'}) .
-                                     " -> " .
-                                     file_type($diffinfo->{'to_mode'}) . ":" .
-                                     $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
-                                                            hash=>$diffinfo->{'to_id'}, file_name=>$diffinfo->{'file'})},
-                                             $diffinfo->{'to_id'});
-                               print "</div>\n"; # class="diff_info"
+                       if ($diffinfo->{'status'} ne "D") { # not deleted file
+                               $to{'href'} = href(action=>"blob", hash_base=>$hash,
+                                                  hash=>$diffinfo->{'to_id'},
+                                                  file_name=>$to{'file'});
                        }
+                       # this is first patch for raw difftree line with $patch_idx index
+                       # we index @$difftree array from 0, but number patches from 1
+                       print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
+               }
 
-                       #print "<div class=\"diff extended_header\">\n";
-                       $in_header = 1;
-                       next LINE;
-               } # start of patch in patchset
-
+               # print "git diff" header
+               $patch_line = shift @diff_header;
+               $patch_line =~ s!^(diff (.*?) )"?a/.*$!$1!;
+               if ($from{'href'}) {
+                       $patch_line .= $cgi->a({-href => $from{'href'}, -class => "path"},
+                                              'a/' . esc_path($from{'file'}));
+               } else { # file was added
+                       $patch_line .= 'a/' . esc_path($from{'file'});
+               }
+               $patch_line .= ' ';
+               if ($to{'href'}) {
+                       $patch_line .= $cgi->a({-href => $to{'href'}, -class => "path"},
+                                              'b/' . esc_path($to{'file'}));
+               } else { # file was deleted
+                       $patch_line .= 'b/' . esc_path($to{'file'});
+               }
+               print "<div class=\"diff header\">$patch_line</div>\n";
+
+               # print extended diff header
+               print "<div class=\"diff extended_header\">\n" if (@diff_header > 0);
+       EXTENDED_HEADER:
+               foreach $patch_line (@diff_header) {
+                       # match <path>
+                       if ($patch_line =~ s!^((copy|rename) from ).*$!$1! && $from{'href'}) {
+                               $patch_line .= $cgi->a({-href=>$from{'href'}, -class=>"path"},
+                                                       esc_path($from{'file'}));
+                       }
+                       if ($patch_line =~ s!^((copy|rename) to ).*$!$1! && $to{'href'}) {
+                               $patch_line = $cgi->a({-href=>$to{'href'}, -class=>"path"},
+                                                     esc_path($to{'file'}));
+                       }
+                       # match <mode>
+                       if ($patch_line =~ m/\s(\d{6})$/) {
+                               $patch_line .= '<span class="info"> (' .
+                                              file_type_long($1) .
+                                              ')</span>';
+                       }
+                       # match <hash>
+                       if ($patch_line =~ m/^index/) {
+                               my ($from_link, $to_link);
+                               if ($from{'href'}) {
+                                       $from_link = $cgi->a({-href=>$from{'href'}, -class=>"hash"},
+                                                            substr($diffinfo->{'from_id'},0,7));
+                               } else {
+                                       $from_link = '0' x 7;
+                               }
+                               if ($to{'href'}) {
+                                       $to_link = $cgi->a({-href=>$to{'href'}, -class=>"hash"},
+                                                          substr($diffinfo->{'to_id'},0,7));
+                               } else {
+                                       $to_link = '0' x 7;
+                               }
+                               #affirm {
+                               #       my ($from_hash, $to_hash) =
+                               #               ($patch_line =~ m/^index ([0-9a-fA-F]{40})..([0-9a-fA-F]{40})/);
+                               #       my ($from_id, $to_id) =
+                               #               ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
+                               #       ($from_hash eq $from_id) && ($to_hash eq $to_id);
+                               #} if DEBUG;
+                               my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
+                               $patch_line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
+                       }
+                       print $patch_line . "<br/>\n";
+               }
+               print "</div>\n"  if (@diff_header > 0); # class="diff extended_header"
+
+               # from-file/to-file diff header
+               $patch_line = $last_patch_line;
+               #assert($patch_line =~ m/^---/) if DEBUG;
+               if ($from{'href'}) {
+                       $patch_line = '--- a/' .
+                                     $cgi->a({-href=>$from{'href'}, -class=>"path"},
+                                             esc_path($from{'file'}));
+               }
+               print "<div class=\"diff from_file\">$patch_line</div>\n";
 
-               if ($in_header && $patch_line =~ m/^---/) {
-                       #print "</div>\n"; # class="diff extended_header"
-                       $in_header = 0;
+               $patch_line = <$fd>;
+               #last PATCH unless $patch_line;
+               chomp $patch_line;
 
-                       my $file = $diffinfo->{'from_file'};
-                       $file  ||= $diffinfo->{'file'};
-                       $file = $cgi->a({-href => href(action=>"blob", hash_base=>$hash_parent,
-                                                      hash=>$diffinfo->{'from_id'}, file_name=>$file),
-                                       -class => "list"}, esc_html($file));
-                       $patch_line =~ s|a/.*$|a/$file|g;
-                       print "<div class=\"diff from_file\">$patch_line</div>\n";
+               #assert($patch_line =~ m/^+++/) if DEBUG;
+               if ($to{'href'}) {
+                       $patch_line = '+++ b/' .
+                                     $cgi->a({-href=>$to{'href'}, -class=>"path"},
+                                             esc_path($to{'file'}));
+               }
+               print "<div class=\"diff to_file\">$patch_line</div>\n";
 
-                       $patch_line = <$fd>;
+               # the patch itself
+       LINE:
+               while ($patch_line = <$fd>) {
                        chomp $patch_line;
 
-                       #$patch_line =~ m/^+++/;
-                       $file    = $diffinfo->{'to_file'};
-                       $file  ||= $diffinfo->{'file'};
-                       $file = $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
-                                                      hash=>$diffinfo->{'to_id'}, file_name=>$file),
-                                       -class => "list"}, esc_html($file));
-                       $patch_line =~ s|b/.*|b/$file|g;
-                       print "<div class=\"diff to_file\">$patch_line</div>\n";
+                       next PATCH if ($patch_line =~ m/^diff /);
 
-                       next LINE;
+                       print format_diff_line($patch_line, \%from, \%to);
                }
-               next LINE if $in_header;
 
-               print format_diff_line($patch_line);
+       } continue {
+               print "</div>\n"; # class="patch"
        }
-       print "</div>\n" if $patch_found; # class="patch"
 
        print "</div>\n"; # class="patchset"
 }
 
 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 
+sub git_project_list_body {
+       my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
+
+       my ($check_forks) = gitweb_check_feature('forks');
+
+       my @projects;
+       foreach my $pr (@$projlist) {
+               my (@aa) = git_get_last_activity($pr->{'path'});
+               unless (@aa) {
+                       next;
+               }
+               ($pr->{'age'}, $pr->{'age_string'}) = @aa;
+               if (!defined $pr->{'descr'}) {
+                       my $descr = git_get_project_description($pr->{'path'}) || "";
+                       $pr->{'descr'} = chop_str($descr, 25, 5);
+               }
+               if (!defined $pr->{'owner'}) {
+                       $pr->{'owner'} = get_file_owner("$projectroot/$pr->{'path'}") || "";
+               }
+               if ($check_forks) {
+                       my $pname = $pr->{'path'};
+                       if (($pname =~ s/\.git$//) &&
+                           ($pname !~ /\/$/) &&
+                           (-d "$projectroot/$pname")) {
+                               $pr->{'forks'} = "-d $projectroot/$pname";
+                       }
+                       else {
+                               $pr->{'forks'} = 0;
+                       }
+               }
+               push @projects, $pr;
+       }
+
+       $order ||= "project";
+       $from = 0 unless defined $from;
+       $to = $#projects if (!defined $to || $#projects < $to);
+
+       print "<table class=\"project_list\">\n";
+       unless ($no_header) {
+               print "<tr>\n";
+               if ($check_forks) {
+                       print "<th></th>\n";
+               }
+               if ($order eq "project") {
+                       @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
+                       print "<th>Project</th>\n";
+               } else {
+                       print "<th>" .
+                             $cgi->a({-href => href(project=>undef, order=>'project'),
+                                      -class => "header"}, "Project") .
+                             "</th>\n";
+               }
+               if ($order eq "descr") {
+                       @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
+                       print "<th>Description</th>\n";
+               } else {
+                       print "<th>" .
+                             $cgi->a({-href => href(project=>undef, order=>'descr'),
+                                      -class => "header"}, "Description") .
+                             "</th>\n";
+               }
+               if ($order eq "owner") {
+                       @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
+                       print "<th>Owner</th>\n";
+               } else {
+                       print "<th>" .
+                             $cgi->a({-href => href(project=>undef, order=>'owner'),
+                                      -class => "header"}, "Owner") .
+                             "</th>\n";
+               }
+               if ($order eq "age") {
+                       @projects = sort {$a->{'age'} <=> $b->{'age'}} @projects;
+                       print "<th>Last Change</th>\n";
+               } else {
+                       print "<th>" .
+                             $cgi->a({-href => href(project=>undef, order=>'age'),
+                                      -class => "header"}, "Last Change") .
+                             "</th>\n";
+               }
+               print "<th></th>\n" .
+                     "</tr>\n";
+       }
+       my $alternate = 1;
+       for (my $i = $from; $i <= $to; $i++) {
+               my $pr = $projects[$i];
+               if ($alternate) {
+                       print "<tr class=\"dark\">\n";
+               } else {
+                       print "<tr class=\"light\">\n";
+               }
+               $alternate ^= 1;
+               if ($check_forks) {
+                       print "<td>";
+                       if ($pr->{'forks'}) {
+                               print "<!-- $pr->{'forks'} -->\n";
+                               print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
+                       }
+                       print "</td>\n";
+               }
+               print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
+                                       -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
+                     "<td>" . esc_html($pr->{'descr'}) . "</td>\n" .
+                     "<td><i>" . chop_str($pr->{'owner'}, 15) . "</i></td>\n";
+               print "<td class=\"". age_class($pr->{'age'}) . "\">" .
+                     $pr->{'age_string'} . "</td>\n" .
+                     "<td class=\"link\">" .
+                     $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
+                     $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
+                     $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
+                     $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
+                     ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
+                     "</td>\n" .
+                     "</tr>\n";
+       }
+       if (defined $extra) {
+               print "<tr>\n";
+               if ($check_forks) {
+                       print "<td></td>\n";
+               }
+               print "<td colspan=\"5\">$extra</td>\n" .
+                     "</tr>\n";
+       }
+       print "</table>\n";
+}
+
 sub git_shortlog_body {
        # uses global variable $project
        my ($revlist, $from, $to, $refs, $extra) = @_;
@@ -2040,9 +2567,12 @@ sub git_shortlog_body {
                                          href(action=>"commit", hash=>$commit), $ref);
                print "</td>\n" .
                      "<td class=\"link\">" .
+                     $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
-                     $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") . " | " .
-                     $cgi->a({-href => href(action=>"snapshot", hash=>$commit)}, "snapshot");
+                     $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
+               if (gitweb_have_snapshot()) {
+                       print " | " . $cgi->a({-href => href(action=>"snapshot", hash=>$commit)}, "snapshot");
+               }
                print "</td>\n" .
                      "</tr>\n";
        }
@@ -2129,8 +2659,7 @@ sub git_tags_body {
        for (my $i = $from; $i <= $to; $i++) {
                my $entry = $taglist->[$i];
                my %tag = %$entry;
-               my $comment_lines = $tag{'comment'};
-               my $comment = shift @$comment_lines;
+               my $comment = $tag{'subject'};
                my $comment_short;
                if (defined $comment) {
                        $comment_short = chop_str($comment, 30, 5);
@@ -2163,7 +2692,7 @@ sub git_tags_body {
                      $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
                if ($tag{'reftype'} eq "commit") {
                        print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") .
-                             " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'refid'})}, "log");
+                             " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log");
                } elsif ($tag{'reftype'} eq "blob") {
                        print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
                }
@@ -2188,23 +2717,23 @@ sub git_heads_body {
        my $alternate = 1;
        for (my $i = $from; $i <= $to; $i++) {
                my $entry = $headlist->[$i];
-               my %tag = %$entry;
-               my $curr = $tag{'id'} eq $head;
+               my %ref = %$entry;
+               my $curr = $ref{'id'} eq $head;
                if ($alternate) {
                        print "<tr class=\"dark\">\n";
                } else {
                        print "<tr class=\"light\">\n";
                }
                $alternate ^= 1;
-               print "<td><i>$tag{'age'}</i></td>\n" .
-                     ($tag{'id'} eq $head ? "<td class=\"current_head\">" : "<td>") .
-                     $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'}),
-                              -class => "list name"},esc_html($tag{'name'})) .
+               print "<td><i>$ref{'age'}</i></td>\n" .
+                     ($curr ? "<td class=\"current_head\">" : "<td>") .
+                     $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'}),
+                              -class => "list name"},esc_html($ref{'name'})) .
                      "</td>\n" .
                      "<td class=\"link\">" .
-                     $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'name'})}, "shortlog") . " | " .
-                     $cgi->a({-href => href(action=>"log", hash=>$tag{'name'})}, "log") . " | " .
-                     $cgi->a({-href => href(action=>"tree", hash=>$tag{'name'}, hash_base=>$tag{'name'})}, "tree") .
+                     $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'name'})}, "shortlog") . " | " .
+                     $cgi->a({-href => href(action=>"log", hash=>$ref{'name'})}, "log") . " | " .
+                     $cgi->a({-href => href(action=>"tree", hash=>$ref{'name'}, hash_base=>$ref{'name'})}, "tree") .
                      "</td>\n" .
                      "</tr>";
        }
@@ -2227,30 +2756,9 @@ sub git_project_list {
        }
 
        my @list = git_get_projects_list();
-       my @projects;
        if (!@list) {
                die_error(undef, "No projects found");
        }
-       foreach my $pr (@list) {
-               my $head = git_get_head_hash($pr->{'path'});
-               if (!defined $head) {
-                       next;
-               }
-               $git_dir = "$projectroot/$pr->{'path'}";
-               my %co = parse_commit($head);
-               if (!%co) {
-                       next;
-               }
-               $pr->{'commit'} = \%co;
-               if (!defined $pr->{'descr'}) {
-                       my $descr = git_get_project_description($pr->{'path'}) || "";
-                       $pr->{'descr'} = chop_str($descr, 25, 5);
-               }
-               if (!defined $pr->{'owner'}) {
-                       $pr->{'owner'} = get_file_owner("$projectroot/$pr->{'path'}") || "";
-               }
-               push @projects, $pr;
-       }
 
        git_header_html();
        if (-f $home_text) {
@@ -2260,75 +2768,30 @@ sub git_project_list {
                close $fd;
                print "</div>\n";
        }
-       print "<table class=\"project_list\">\n" .
-             "<tr>\n";
-       $order ||= "project";
-       if ($order eq "project") {
-               @projects = sort {$a->{'path'} cmp $b->{'path'}} @projects;
-               print "<th>Project</th>\n";
-       } else {
-               print "<th>" .
-                     $cgi->a({-href => href(project=>undef, order=>'project'),
-                              -class => "header"}, "Project") .
-                     "</th>\n";
-       }
-       if ($order eq "descr") {
-               @projects = sort {$a->{'descr'} cmp $b->{'descr'}} @projects;
-               print "<th>Description</th>\n";
-       } else {
-               print "<th>" .
-                     $cgi->a({-href => href(project=>undef, order=>'descr'),
-                              -class => "header"}, "Description") .
-                     "</th>\n";
-       }
-       if ($order eq "owner") {
-               @projects = sort {$a->{'owner'} cmp $b->{'owner'}} @projects;
-               print "<th>Owner</th>\n";
-       } else {
-               print "<th>" .
-                     $cgi->a({-href => href(project=>undef, order=>'owner'),
-                              -class => "header"}, "Owner") .
-                     "</th>\n";
-       }
-       if ($order eq "age") {
-               @projects = sort {$a->{'commit'}{'age'} <=> $b->{'commit'}{'age'}} @projects;
-               print "<th>Last Change</th>\n";
-       } else {
-               print "<th>" .
-                     $cgi->a({-href => href(project=>undef, order=>'age'),
-                              -class => "header"}, "Last Change") .
-                     "</th>\n";
+       git_project_list_body(\@list, $order);
+       git_footer_html();
+}
+
+sub git_forks {
+       my $order = $cgi->param('o');
+       if (defined $order && $order !~ m/project|descr|owner|age/) {
+               die_error(undef, "Unknown order parameter");
        }
-       print "<th></th>\n" .
-             "</tr>\n";
-       my $alternate = 1;
-       foreach my $pr (@projects) {
-               if ($alternate) {
-                       print "<tr class=\"dark\">\n";
-               } else {
-                       print "<tr class=\"light\">\n";
-               }
-               $alternate ^= 1;
-               print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
-                                       -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
-                     "<td>" . esc_html($pr->{'descr'}) . "</td>\n" .
-                     "<td><i>" . chop_str($pr->{'owner'}, 15) . "</i></td>\n";
-               print "<td class=\"". age_class($pr->{'commit'}{'age'}) . "\">" .
-                     $pr->{'commit'}{'age_string'} . "</td>\n" .
-                     "<td class=\"link\">" .
-                     $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
-                     $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
-                     $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
-                     $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
-                     "</td>\n" .
-                     "</tr>\n";
+
+       my @list = git_get_projects_list($project);
+       if (!@list) {
+               die_error(undef, "No forks found");
        }
-       print "</table>\n";
+
+       git_header_html();
+       git_print_page_nav('','');
+       git_print_header_div('summary', "$project forks");
+       git_project_list_body(\@list, $order);
        git_footer_html();
 }
 
 sub git_project_index {
-       my @projects = git_get_projects_list();
+       my @projects = git_get_projects_list($project);
 
        print $cgi->header(
                -type => 'text/plain',
@@ -2359,17 +2822,14 @@ sub git_summary {
 
        my $owner = git_get_project_owner($project);
 
-       my ($reflist, $refs) = git_get_refs_list();
+       my $refs = git_get_references();
+       my @taglist  = git_get_tags_list(15);
+       my @headlist = git_get_heads_list(15);
+       my @forklist;
+       my ($check_forks) = gitweb_check_feature('forks');
 
-       my @taglist;
-       my @headlist;
-       foreach my $ref (@$reflist) {
-               if ($ref->{'name'} =~ s!^heads/!!) {
-                       push @headlist, $ref;
-               } else {
-                       $ref->{'name'} =~ s!^tags/!!;
-                       push @taglist, $ref;
-               }
+       if ($check_forks) {
+               @forklist = git_get_projects_list($project);
        }
 
        git_header_html();
@@ -2392,8 +2852,16 @@ sub git_summary {
        }
        print "</table>\n";
 
+       if (-s "$projectroot/$project/README.html") {
+               if (open my $fd, "$projectroot/$project/README.html") {
+                       print "<div class=\"title\">readme</div>\n";
+                       print $_ while (<$fd>);
+                       close $fd;
+               }
+       }
+
        open my $fd, "-|", git_cmd(), "rev-list", "--max-count=17",
-               git_get_head_hash($project)
+               git_get_head_hash($project), "--"
                or die_error(undef, "Open git-rev-list failed");
        my @revlist = map { chomp; $_ } <$fd>;
        close $fd;
@@ -2413,6 +2881,13 @@ sub git_summary {
                               $cgi->a({-href => href(action=>"heads")}, "..."));
        }
 
+       if (@forklist) {
+               git_print_header_div('forks');
+               git_project_list_body(\@forklist, undef, 0, 15,
+                                     $cgi->a({-href => href(action=>"forks")}, "..."),
+                                     'noheader');
+       }
+
        git_footer_html();
 }
 
@@ -2443,6 +2918,7 @@ sub git_tag {
        print "<div class=\"page_body\">";
        my $comment = $tag{'comment'};
        foreach my $line (@$comment) {
+               chomp($line);
                print esc_html($line) . "<br/>\n";
        }
        print "</div>\n";
@@ -2470,7 +2946,8 @@ sub git_blame2 {
        if ($ftype !~ "blob") {
                die_error("400 Bad Request", "Object is not a blob");
        }
-       open ($fd, "-|", git_cmd(), "blame", '-l', '--', $file_name, $hash_base)
+       open ($fd, "-|", git_cmd(), "blame", '-p', '--',
+             $file_name, $hash_base)
                or die_error(undef, "Open git-blame failed");
        git_header_html();
        my $formats_nav =
@@ -2494,25 +2971,53 @@ sub git_blame2 {
 <table class="blame">
 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
 HTML
-       while (<$fd>) {
-               /^([0-9a-fA-F]{40}).*?(\d+)\)\s{1}(\s*.*)/;
-               my $full_rev = $1;
+       my %metainfo = ();
+       while (1) {
+               $_ = <$fd>;
+               last unless defined $_;
+               my ($full_rev, $orig_lineno, $lineno, $group_size) =
+                   /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/;
+               if (!exists $metainfo{$full_rev}) {
+                       $metainfo{$full_rev} = {};
+               }
+               my $meta = $metainfo{$full_rev};
+               while (<$fd>) {
+                       last if (s/^\t//);
+                       if (/^(\S+) (.*)$/) {
+                               $meta->{$1} = $2;
+                       }
+               }
+               my $data = $_;
+               chomp($data);
                my $rev = substr($full_rev, 0, 8);
-               my $lineno = $2;
-               my $data = $3;
-
-               if (!defined $last_rev) {
-                       $last_rev = $full_rev;
-               } elsif ($last_rev ne $full_rev) {
-                       $last_rev = $full_rev;
+               my $author = $meta->{'author'};
+               my %date = parse_date($meta->{'author-time'},
+                                     $meta->{'author-tz'});
+               my $date = $date{'iso-tz'};
+               if ($group_size) {
                        $current_color = ++$current_color % $num_colors;
                }
                print "<tr class=\"$rev_color[$current_color]\">\n";
-               print "<td class=\"sha1\">" .
-                       $cgi->a({-href => href(action=>"commit", hash=>$full_rev, file_name=>$file_name)},
-                               esc_html($rev)) . "</td>\n";
-               print "<td class=\"linenr\"><a id=\"l$lineno\" href=\"#l$lineno\" class=\"linenr\">" .
-                     esc_html($lineno) . "</a></td>\n";
+               if ($group_size) {
+                       print "<td class=\"sha1\"";
+                       print " title=\"". esc_html($author) . ", $date\"";
+                       print " rowspan=\"$group_size\"" if ($group_size > 1);
+                       print ">";
+                       print $cgi->a({-href => href(action=>"commit",
+                                                    hash=>$full_rev,
+                                                    file_name=>$file_name)},
+                                     esc_html($rev));
+                       print "</td>\n";
+               }
+               my $blamed = href(action => 'blame',
+                                 file_name => $meta->{'filename'},
+                                 hash_base => $full_rev);
+               print "<td class=\"linenr\">";
+               print $cgi->a({ -href => "$blamed#l$orig_lineno",
+                               -id => "l$lineno",
+                               -class => "linenr" },
+                             esc_html($lineno));
+               print "</td>";
                print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
                print "</tr>\n";
        }
@@ -2626,9 +3131,9 @@ sub git_tags {
        git_print_page_nav('','', $head,undef,$head);
        git_print_header_div('summary', $project);
 
-       my ($taglist) = git_get_refs_list("tags");
-       if (@$taglist) {
-               git_tags_body($taglist);
+       my @tagslist = git_get_tags_list();
+       if (@tagslist) {
+               git_tags_body(\@tagslist);
        }
        git_footer_html();
 }
@@ -2639,9 +3144,9 @@ sub git_heads {
        git_print_page_nav('','', $head,undef,$head);
        git_print_header_div('summary', $project);
 
-       my ($headlist) = git_get_refs_list("heads");
-       if (@$headlist) {
-               git_heads_body($headlist, $head);
+       my @headslist = git_get_heads_list();
+       if (@headslist) {
+               git_heads_body(\@headslist, $head);
        }
        git_footer_html();
 }
@@ -2754,7 +3259,7 @@ sub git_blob {
                $nr++;
                $line = untabify($line);
                printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
-                      $nr, $nr, $nr, esc_html($line);
+                      $nr, $nr, $nr, esc_html($line, -nbsp=>1);
        }
        close $fd
                or print "Reading blob failed.\n";
@@ -2785,7 +3290,7 @@ sub git_tree {
        my $refs = git_get_references();
        my $ref = format_ref_marker($refs, $hash_base);
        git_header_html();
-       my $base = "";
+       my $basedir = '';
        my ($have_blame) = gitweb_check_feature('blame');
        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
                my @views_nav = ();
@@ -2802,7 +3307,7 @@ sub git_tree {
                        # FIXME: Should be available when we have no hash base as well.
                        push @views_nav,
                                $cgi->a({-href => href(action=>"snapshot", hash=>$hash)},
-                                       "snapshot");
+                                       "snapshot");
                }
                git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
@@ -2813,12 +3318,39 @@ sub git_tree {
                print "<div class=\"title\">$hash</div>\n";
        }
        if (defined $file_name) {
-               $base = esc_html("$file_name/");
+               $basedir = $file_name;
+               if ($basedir ne '' && substr($basedir, -1) ne '/') {
+                       $basedir .= '/';
+               }
        }
        git_print_page_path($file_name, 'tree', $hash_base);
        print "<div class=\"page_body\">\n";
        print "<table cellspacing=\"0\">\n";
        my $alternate = 1;
+       # '..' (top directory) link if possible
+       if (defined $hash_base &&
+           defined $file_name && $file_name =~ m![^/]+$!) {
+               if ($alternate) {
+                       print "<tr class=\"dark\">\n";
+               } else {
+                       print "<tr class=\"light\">\n";
+               }
+               $alternate ^= 1;
+
+               my $up = $file_name;
+               $up =~ s!/?[^/]+$!!;
+               undef $up unless $up;
+               # based on git_print_tree_entry
+               print '<td class="mode">' . mode_str('040000') . "</td>\n";
+               print '<td class="list">';
+               print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
+                                            file_name=>$up)},
+                             "..");
+               print "</td>\n";
+               print "<td class=\"link\"></td>\n";
+
+               print "</tr>\n";
+       }
        foreach my $line (@entries) {
                my %t = parse_ls_tree_line($line, -z => 1);
 
@@ -2829,7 +3361,7 @@ sub git_tree {
                }
                $alternate ^= 1;
 
-               git_print_tree_entry(\%t, $base, $hash_base, $have_blame);
+               git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
 
                print "</tr>\n";
        }
@@ -2857,9 +3389,12 @@ sub git_snapshot {
                -content_disposition => 'inline; filename="' . "$filename" . '"',
                -status => '200 OK');
 
-       my $git_command = git_cmd_str();
-       open my $fd, "-|", "$git_command tar-tree $hash \'$project\' | $command" or
-               die_error(undef, "Execute git-tar-tree failed.");
+       my $git = git_cmd_str();
+       my $name = $project;
+       $name =~ s/\047/\047\\\047\047/g;
+       open my $fd, "-|",
+       "$git archive --format=tar --prefix=\'$name\'/ $hash | $command"
+               or die_error(undef, "Execute git-tar-tree failed.");
        binmode STDOUT, ':raw';
        print <$fd>;
        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
@@ -2878,7 +3413,7 @@ sub git_log {
        my $refs = git_get_references();
 
        my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
-       open my $fd, "-|", git_cmd(), "rev-list", $limit, $hash
+       open my $fd, "-|", git_cmd(), "rev-list", $limit, $hash, "--"
                or die_error(undef, "Open git-rev-list failed");
        my @revlist = map { chomp; $_ } <$fd>;
        close $fd;
@@ -2917,13 +3452,14 @@ sub git_log {
                      "</div>\n";
 
                print "<div class=\"log_body\">\n";
-               git_print_simplified_log($co{'comment'});
+               git_print_log($co{'comment'}, -final_empty_line=> 1);
                print "</div>\n";
        }
        git_footer_html();
 }
 
 sub git_commit {
+       $hash ||= $hash_base || "HEAD";
        my %co = parse_commit($hash);
        if (!%co) {
                die_error(undef, "Unknown commit object");
@@ -2935,7 +3471,8 @@ sub git_commit {
        if (!defined $parent) {
                $parent = "--root";
        }
-       open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts, $parent, $hash
+       open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
+               @diff_opts, $parent, $hash, "--"
                or die_error(undef, "Open git-diff-tree failed");
        my @difftree = map { chomp; $_ } <$fd>;
        close $fd or die_error(undef, "Reading git-diff-tree failed");
@@ -2956,13 +3493,8 @@ sub git_commit {
                        $cgi->a({-href => href(action=>"blame", hash_parent=>$parent, file_name=>$file_name)},
                                "blame");
        }
-       if (defined $co{'parent'}) {
-               push @views_nav,
-                       $cgi->a({-href => href(action=>"shortlog", hash=>$hash)}, "shortlog"),
-                       $cgi->a({-href => href(action=>"log", hash=>$hash)}, "log");
-       }
        git_header_html(undef, $expires);
-       git_print_page_nav('commit', defined $co{'parent'} ? '' : 'commitdiff',
+       git_print_page_nav('commit', '',
                           $hash, $co{'tree'}, $hash,
                           join (' | ', @views_nav));
 
@@ -3045,7 +3577,8 @@ sub git_blobdiff {
        if (defined $hash_base && defined $hash_parent_base) {
                if (defined $file_name) {
                        # read raw output
-                       open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts, $hash_parent_base, $hash_base,
+                       open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
+                               $hash_parent_base, $hash_base,
                                "--", $file_name
                                or die_error(undef, "Open git-diff-tree failed");
                        @difftree = map { chomp; $_ } <$fd>;
@@ -3059,7 +3592,8 @@ sub git_blobdiff {
                        # try to find filename from $hash
 
                        # read filtered raw output
-                       open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts, $hash_parent_base, $hash_base
+                       open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
+                               $hash_parent_base, $hash_base, "--"
                                or die_error(undef, "Open git-diff-tree failed");
                        @difftree =
                                # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
@@ -3129,7 +3663,8 @@ sub git_blobdiff {
                }
 
                # open patch output
-               open $fd, "-|", git_cmd(), "diff", '-p', @diff_opts, $hash_parent, $hash
+               open $fd, "-|", git_cmd(), "diff", '-p', @diff_opts,
+                       $hash_parent, $hash, "--"
                        or die_error(undef, "Open git-diff failed");
        } else  {
                die_error('404 Not Found', "Missing one of the blob diff parameters")
@@ -3183,8 +3718,8 @@ sub git_blobdiff {
 
        } else {
                while (my $line = <$fd>) {
-                       $line =~ s!a/($hash|$hash_parent)!'a/'.esc_html($diffinfo{'from_file'})!eg;
-                       $line =~ s!b/($hash|$hash_parent)!'b/'.esc_html($diffinfo{'to_file'})!eg;
+                       $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
+                       $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
 
                        print $line;
 
@@ -3202,10 +3737,56 @@ sub git_blobdiff_plain {
 
 sub git_commitdiff {
        my $format = shift || 'html';
+       $hash ||= $hash_base || "HEAD";
        my %co = parse_commit($hash);
        if (!%co) {
                die_error(undef, "Unknown commit object");
        }
+
+       # we need to prepare $formats_nav before any parameter munging
+       my $formats_nav;
+       if ($format eq 'html') {
+               $formats_nav =
+                       $cgi->a({-href => href(action=>"commitdiff_plain",
+                                              hash=>$hash, hash_parent=>$hash_parent)},
+                               "raw");
+
+               if (defined $hash_parent) {
+                       # commitdiff with two commits given
+                       my $hash_parent_short = $hash_parent;
+                       if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
+                               $hash_parent_short = substr($hash_parent, 0, 7);
+                       }
+                       $formats_nav .=
+                               ' (from: ' .
+                               $cgi->a({-href => href(action=>"commitdiff",
+                                                      hash=>$hash_parent)},
+                                       esc_html($hash_parent_short)) .
+                               ')';
+               } elsif (!$co{'parent'}) {
+                       # --root commitdiff
+                       $formats_nav .= ' (initial)';
+               } elsif (scalar @{$co{'parents'}} == 1) {
+                       # single parent commit
+                       $formats_nav .=
+                               ' (parent: ' .
+                               $cgi->a({-href => href(action=>"commitdiff",
+                                                      hash=>$co{'parent'})},
+                                       esc_html(substr($co{'parent'}, 0, 7))) .
+                               ')';
+               } else {
+                       # merge commit
+                       $formats_nav .=
+                               ' (merge: ' .
+                               join(' ', map {
+                                       $cgi->a({-href => href(action=>"commitdiff",
+                                                              hash=>$_)},
+                                               esc_html(substr($_, 0, 7)));
+                               } @{$co{'parents'}} ) .
+                               ')';
+               }
+       }
+
        if (!defined $hash_parent) {
                $hash_parent = $co{'parent'} || '--root';
        }
@@ -3215,10 +3796,12 @@ sub git_commitdiff {
        my @difftree;
        if ($format eq 'html') {
                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
-                       "--patch-with-raw", "--full-index", $hash_parent, $hash
+                       "--no-commit-id", "--patch-with-raw", "--full-index",
+                       $hash_parent, $hash, "--"
                        or die_error(undef, "Open git-diff-tree failed");
 
-               while (chomp(my $line = <$fd>)) {
+               while (my $line = <$fd>) {
+                       chomp $line;
                        # empty line ends raw part of diff-tree output
                        last unless $line;
                        push @difftree, $line;
@@ -3226,7 +3809,7 @@ sub git_commitdiff {
 
        } elsif ($format eq 'plain') {
                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
-                       '-p', $hash_parent, $hash
+                       '-p', $hash_parent, $hash, "--"
                        or die_error(undef, "Open git-diff-tree failed");
 
        } else {
@@ -3243,19 +3826,17 @@ sub git_commitdiff {
        if ($format eq 'html') {
                my $refs = git_get_references();
                my $ref = format_ref_marker($refs, $co{'id'});
-               my $formats_nav =
-                       $cgi->a({-href => href(action=>"commitdiff_plain",
-                                              hash=>$hash, hash_parent=>$hash_parent)},
-                               "raw");
 
                git_header_html(undef, $expires);
                git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
                git_print_authorship(\%co);
                print "<div class=\"page_body\">\n";
-               print "<div class=\"log\">\n";
-               git_print_simplified_log($co{'comment'}, 1); # skip title
-               print "</div>\n"; # class="log"
+               if (@{$co{'comment'}} > 1) {
+                       print "<div class=\"log\">\n";
+                       git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
+                       print "</div>\n"; # class="log"
+               }
 
        } elsif ($format eq 'plain') {
                my $refs = git_get_references("tags");
@@ -3387,18 +3968,8 @@ sub git_search {
                die_error(undef, "Unknown commit object");
        }
 
-       my $commit_search = 1;
-       my $author_search = 0;
-       my $committer_search = 0;
-       my $pickaxe_search = 0;
-       if ($searchtext =~ s/^author\\://i) {
-               $author_search = 1;
-       } elsif ($searchtext =~ s/^committer\\://i) {
-               $committer_search = 1;
-       } elsif ($searchtext =~ s/^pickaxe\\://i) {
-               $commit_search = 0;
-               $pickaxe_search = 1;
-
+       $searchtype ||= 'commit';
+       if ($searchtype eq 'pickaxe') {
                # pickaxe may take all resources of your box and run for several minutes
                # with every query - so decide by yourself how public you make this feature
                my ($have_pickaxe) = gitweb_check_feature('pickaxe');
@@ -3406,23 +3977,26 @@ sub git_search {
                        die_error('403 Permission denied', "Permission denied");
                }
        }
+
        git_header_html();
        git_print_page_nav('','', $hash,$co{'tree'},$hash);
        git_print_header_div('commit', esc_html($co{'title'}), $hash);
 
        print "<table cellspacing=\"0\">\n";
        my $alternate = 1;
-       if ($commit_search) {
+       if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
                $/ = "\0";
-               open my $fd, "-|", git_cmd(), "rev-list", "--header", "--parents", $hash or next;
+               open my $fd, "-|", git_cmd(), "rev-list",
+                       "--header", "--parents", $hash, "--"
+                       or next;
                while (my $commit_text = <$fd>) {
                        if (!grep m/$searchtext/i, $commit_text) {
                                next;
                        }
-                       if ($author_search && !grep m/\nauthor .*$searchtext/i, $commit_text) {
+                       if ($searchtype eq 'author' && !grep m/\nauthor .*$searchtext/i, $commit_text) {
                                next;
                        }
-                       if ($committer_search && !grep m/\ncommitter .*$searchtext/i, $commit_text) {
+                       if ($searchtype eq 'committer' && !grep m/\ncommitter .*$searchtext/i, $commit_text) {
                                next;
                        }
                        my @commit_lines = split "\n", $commit_text;
@@ -3464,7 +4038,7 @@ sub git_search {
                close $fd;
        }
 
-       if ($pickaxe_search) {
+       if ($searchtype eq 'pickaxe') {
                $/ = "\n";
                my $git_command = git_cmd_str();
                open my $fd, "-|", "$git_command rev-list $hash | " .
@@ -3504,7 +4078,7 @@ sub git_search {
                                                print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
                                                                             hash=>$set{'id'}, file_name=>$set{'file'}),
                                                              -class => "list"},
-                                                             "<span class=\"match\">" . esc_html($set{'file'}) . "</span>") .
+                                                             "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
                                                      "<br/>\n";
                                        }
                                        print "</td>\n" .
@@ -3524,6 +4098,31 @@ sub git_search {
        git_footer_html();
 }
 
+sub git_search_help {
+       git_header_html();
+       git_print_page_nav('','', $hash,$hash,$hash);
+       print <<EOT;
+<dl>
+<dt><b>commit</b></dt>
+<dd>The commit messages and authorship information will be scanned for the given string.</dd>
+<dt><b>author</b></dt>
+<dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given string.</dd>
+<dt><b>committer</b></dt>
+<dd>Name and e-mail of the committer and date of commit will be scanned for the given string.</dd>
+EOT
+       my ($have_pickaxe) = gitweb_check_feature('pickaxe');
+       if ($have_pickaxe) {
+               print <<EOT;
+<dt><b>pickaxe</b></dt>
+<dd>All commits that caused the string to appear or disappear from any file (changes that
+added, removed or "modified" the string) will be listed. This search can take a while and
+takes a lot of strain on the server, so please use it wisely.</dd>
+EOT
+       }
+       print "</dl>\n";
+       git_footer_html();
+}
+
 sub git_shortlog {
        my $head = git_get_head_hash($project);
        if (!defined $hash) {
@@ -3535,7 +4134,7 @@ sub git_shortlog {
        my $refs = git_get_references();
 
        my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
-       open my $fd, "-|", git_cmd(), "rev-list", $limit, $hash
+       open my $fd, "-|", git_cmd(), "rev-list", $limit, $hash, "--"
                or die_error(undef, "Open git-rev-list failed");
        my @revlist = map { chomp; $_ } <$fd>;
        close $fd;
@@ -3559,25 +4158,125 @@ sub git_shortlog {
 }
 
 ## ......................................................................
-## feeds (RSS, OPML)
+## feeds (RSS, Atom; OPML)
 
-sub git_rss {
-       # http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
-       open my $fd, "-|", git_cmd(), "rev-list", "--max-count=150", git_get_head_hash($project)
+sub git_feed {
+       my $format = shift || 'atom';
+       my ($have_blame) = gitweb_check_feature('blame');
+
+       # Atom: http://www.atomenabled.org/developers/syndication/
+       # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
+       if ($format ne 'rss' && $format ne 'atom') {
+               die_error(undef, "Unknown web feed format");
+       }
+
+       # log/feed of current (HEAD) branch, log of given branch, history of file/directory
+       my $head = $hash || 'HEAD';
+       open my $fd, "-|", git_cmd(), "rev-list", "--max-count=150",
+               $head, "--", (defined $file_name ? $file_name : ())
                or die_error(undef, "Open git-rev-list failed");
        my @revlist = map { chomp; $_ } <$fd>;
        close $fd or die_error(undef, "Reading git-rev-list failed");
-       print $cgi->header(-type => 'text/xml', -charset => 'utf-8');
-       print <<XML;
-<?xml version="1.0" encoding="utf-8"?>
+
+       my %latest_commit;
+       my %latest_date;
+       my $content_type = "application/$format+xml";
+       if (defined $cgi->http('HTTP_ACCEPT') &&
+                $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
+               # browser (feed reader) prefers text/xml
+               $content_type = 'text/xml';
+       }
+       if (defined($revlist[0])) {
+               %latest_commit = parse_commit($revlist[0]);
+               %latest_date   = parse_date($latest_commit{'committer_epoch'});
+               print $cgi->header(
+                       -type => $content_type,
+                       -charset => 'utf-8',
+                       -last_modified => $latest_date{'rfc2822'});
+       } else {
+               print $cgi->header(
+                       -type => $content_type,
+                       -charset => 'utf-8');
+       }
+
+       # Optimization: skip generating the body if client asks only
+       # for Last-Modified date.
+       return if ($cgi->request_method() eq 'HEAD');
+
+       # header variables
+       my $title = "$site_name - $project/$action";
+       my $feed_type = 'log';
+       if (defined $hash) {
+               $title .= " - '$hash'";
+               $feed_type = 'branch log';
+               if (defined $file_name) {
+                       $title .= " :: $file_name";
+                       $feed_type = 'history';
+               }
+       } elsif (defined $file_name) {
+               $title .= " - $file_name";
+               $feed_type = 'history';
+       }
+       $title .= " $feed_type";
+       my $descr = git_get_project_description($project);
+       if (defined $descr) {
+               $descr = esc_html($descr);
+       } else {
+               $descr = "$project " .
+                        ($format eq 'rss' ? 'RSS' : 'Atom') .
+                        " feed";
+       }
+       my $owner = git_get_project_owner($project);
+       $owner = esc_html($owner);
+
+       #header
+       my $alt_url;
+       if (defined $file_name) {
+               $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
+       } elsif (defined $hash) {
+               $alt_url = href(-full=>1, action=>"log", hash=>$hash);
+       } else {
+               $alt_url = href(-full=>1, action=>"summary");
+       }
+       print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
+       if ($format eq 'rss') {
+               print <<XML;
 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
 <channel>
-<title>$project $my_uri $my_url</title>
-<link>${\esc_html("$my_url?p=$project;a=summary")}</link>
-<description>$project log</description>
-<language>en</language>
 XML
+               print "<title>$title</title>\n" .
+                     "<link>$alt_url</link>\n" .
+                     "<description>$descr</description>\n" .
+                     "<language>en</language>\n";
+       } elsif ($format eq 'atom') {
+               print <<XML;
+<feed xmlns="http://www.w3.org/2005/Atom">
+XML
+               print "<title>$title</title>\n" .
+                     "<subtitle>$descr</subtitle>\n" .
+                     '<link rel="alternate" type="text/html" href="' .
+                     $alt_url . '" />' . "\n" .
+                     '<link rel="self" type="' . $content_type . '" href="' .
+                     $cgi->self_url() . '" />' . "\n" .
+                     "<id>" . href(-full=>1) . "</id>\n" .
+                     # use project owner for feed author
+                     "<author><name>$owner</name></author>\n";
+               if (defined $favicon) {
+                       print "<icon>" . esc_url($favicon) . "</icon>\n";
+               }
+               if (defined $logo_url) {
+                       # not twice as wide as tall: 72 x 27 pixels
+                       print "<logo>" . esc_url($logo_url) . "</logo>\n";
+               }
+               if (! %latest_date) {
+                       # dummy date to keep the feed valid until commits trickle in:
+                       print "<updated>1970-01-01T00:00:00Z</updated>\n";
+               } else {
+                       print "<updated>$latest_date{'iso-8601'}</updated>\n";
+               }
+       }
 
+       # contents
        for (my $i = 0; $i <= $#revlist; $i++) {
                my $commit = $revlist[$i];
                my %co = parse_commit($commit);
@@ -3586,42 +4285,100 @@ sub git_rss {
                        last;
                }
                my %cd = parse_date($co{'committer_epoch'});
+
+               # get list of changed files
                open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
-                       $co{'parent'}, $co{'id'}
+                       $co{'parent'}, $co{'id'}, "--", (defined $file_name ? $file_name : ())
                        or next;
                my @difftree = map { chomp; $_ } <$fd>;
                close $fd
                        or next;
-               print "<item>\n" .
-                     "<title>" .
-                     sprintf("%d %s %02d:%02d", $cd{'mday'}, $cd{'month'}, $cd{'hour'}, $cd{'minute'}) . " - " . esc_html($co{'title'}) .
-                     "</title>\n" .
-                     "<author>" . esc_html($co{'author'}) . "</author>\n" .
-                     "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
-                     "<guid isPermaLink=\"true\">" . esc_html("$my_url?p=$project;a=commit;h=$commit") . "</guid>\n" .
-                     "<link>" . esc_html("$my_url?p=$project;a=commit;h=$commit") . "</link>\n" .
-                     "<description>" . esc_html($co{'title'}) . "</description>\n" .
-                     "<content:encoded>" .
-                     "<![CDATA[\n";
+
+               # print element (entry, item)
+               my $co_url = href(-full=>1, action=>"commit", hash=>$commit);
+               if ($format eq 'rss') {
+                       print "<item>\n" .
+                             "<title>" . esc_html($co{'title'}) . "</title>\n" .
+                             "<author>" . esc_html($co{'author'}) . "</author>\n" .
+                             "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
+                             "<guid isPermaLink=\"true\">$co_url</guid>\n" .
+                             "<link>$co_url</link>\n" .
+                             "<description>" . esc_html($co{'title'}) . "</description>\n" .
+                             "<content:encoded>" .
+                             "<![CDATA[\n";
+               } elsif ($format eq 'atom') {
+                       print "<entry>\n" .
+                             "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
+                             "<updated>$cd{'iso-8601'}</updated>\n" .
+                             "<author><name>" . esc_html($co{'author_name'}) . "</name></author>\n" .
+                             # use committer for contributor
+                             "<contributor><name>" . esc_html($co{'committer_name'}) . "</name></contributor>\n" .
+                             "<published>$cd{'iso-8601'}</published>\n" .
+                             "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
+                             "<id>$co_url</id>\n" .
+                             "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
+                             "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
+               }
                my $comment = $co{'comment'};
+               print "<pre>\n";
                foreach my $line (@$comment) {
-                       $line = decode("utf8", $line, Encode::FB_DEFAULT);
-                       print "$line<br/>\n";
+                       $line = esc_html($line);
+                       print "$line\n";
                }
-               print "<br/>\n";
-               foreach my $line (@difftree) {
-                       if (!($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/)) {
-                               next;
+               print "</pre><ul>\n";
+               foreach my $difftree_line (@difftree) {
+                       my %difftree = parse_difftree_raw_line($difftree_line);
+                       next if !$difftree{'from_id'};
+
+                       my $file = $difftree{'file'} || $difftree{'to_file'};
+
+                       print "<li>" .
+                             "[" .
+                             $cgi->a({-href => href(-full=>1, action=>"blobdiff",
+                                                    hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
+                                                    hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
+                                                    file_name=>$file, file_parent=>$difftree{'from_file'}),
+                                     -title => "diff"}, 'D');
+                       if ($have_blame) {
+                               print $cgi->a({-href => href(-full=>1, action=>"blame",
+                                                            file_name=>$file, hash_base=>$commit),
+                                             -title => "blame"}, 'B');
                        }
-                       my $file = esc_html(unquote($7));
-                       $file = decode("utf8", $file, Encode::FB_DEFAULT);
-                       print "$file<br/>\n";
+                       # if this is not a feed of a file history
+                       if (!defined $file_name || $file_name ne $file) {
+                               print $cgi->a({-href => href(-full=>1, action=>"history",
+                                                            file_name=>$file, hash=>$commit),
+                                             -title => "history"}, 'H');
+                       }
+                       $file = esc_path($file);
+                       print "] ".
+                             "$file</li>\n";
+               }
+               if ($format eq 'rss') {
+                       print "</ul>]]>\n" .
+                             "</content:encoded>\n" .
+                             "</item>\n";
+               } elsif ($format eq 'atom') {
+                       print "</ul>\n</div>\n" .
+                             "</content>\n" .
+                             "</entry>\n";
                }
-               print "]]>\n" .
-                     "</content:encoded>\n" .
-                     "</item>\n";
        }
-       print "</channel></rss>";
+
+       # end of feed
+       if ($format eq 'rss') {
+               print "</channel>\n</rss>\n";
+       }       elsif ($format eq 'atom') {
+               print "</feed>\n";
+       }
+}
+
+sub git_rss {
+       git_feed('rss');
+}
+
+sub git_atom {
+       git_feed('atom');
 }
 
 sub git_opml {
@@ -3632,7 +4389,7 @@ sub git_opml {
 <?xml version="1.0" encoding="utf-8"?>
 <opml version="1.0">
 <head>
-  <title>$site_name Git OPML Export</title>
+  <title>$site_name OPML Export</title>
 </head>
 <body>
 <outline text="git RSS feeds">