Add branch --set-upstream
[gitweb.git] / gitweb / gitweb.perl
index 43fa791de0691e7800e1471a6f0dfc81ce32a9dd..7e477af9567cff322d18fc9a1fbfe507732418dc 100755 (executable)
 use File::Basename qw(basename);
 binmode STDOUT, ':utf8';
 
+our $t0;
+if (eval { require Time::HiRes; 1; }) {
+       $t0 = [Time::HiRes::gettimeofday()];
+}
+our $number_of_git_cmds = 0;
+
 BEGIN {
        CGI->compile() if $ENV{'MOD_PERL'};
 }
@@ -90,11 +96,13 @@ BEGIN
 our $logo = "++GITWEB_LOGO++";
 # URI of GIT favicon, assumed to be image/png type
 our $favicon = "++GITWEB_FAVICON++";
+# URI of gitweb.js (JavaScript code for gitweb)
+our $javascript = "++GITWEB_JS++";
 
 # 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_url = "http://git-scm.com/";
 our $logo_label = "git homepage";
 
 # source of projects list
@@ -160,7 +168,8 @@ BEGIN
        #       'suffix' => filename suffix,
        #       'format' => --format for git-archive,
        #       'compressor' => [compressor command and arguments]
-       #                       (array reference, optional)}
+       #                       (array reference, optional)
+       #       'disabled' => boolean (optional)}
        #
        'tgz' => {
                'display' => 'tar.gz',
@@ -176,6 +185,14 @@ BEGIN
                'format' => 'tar',
                'compressor' => ['bzip2']},
 
+       'txz' => {
+               'display' => 'tar.xz',
+               'type' => 'application/x-xz',
+               'suffix' => '.tar.xz',
+               'format' => 'tar',
+               'compressor' => ['xz'],
+               'disabled' => 1},
+
        'zip' => {
                'display' => 'zip',
                'type' => 'application/x-zip',
@@ -188,6 +205,7 @@ BEGIN
 our %known_snapshot_format_aliases = (
        'gzip'  => 'tgz',
        'bzip2' => 'tbz2',
+       'xz'    => 'txz',
 
        # backward compatibility: legacy gitweb config support
        'x-gzip' => undef, 'gz' => undef,
@@ -195,6 +213,14 @@ BEGIN
        'x-zip' => undef, '' => undef,
 );
 
+# Pixel sizes for icons and avatars. If the default font sizes or lineheights
+# are changed, it may be appropriate to change these values too via
+# $GITWEB_CONFIG.
+our %avatar_size = (
+       'default' => 16,
+       'double'  => 32
+);
+
 # You define site-wide feature defaults here; override them with
 # $GITWEB_CONFIG as necessary.
 our %feature = (
@@ -279,6 +305,19 @@ BEGIN
                'override' => 0,
                'default' => [1]},
 
+       # Enable showing size of blobs in a 'tree' view, in a separate
+       # column, similar to what 'ls -l' does.  This cost a bit of IO.
+
+       # To disable system wide have in $GITWEB_CONFIG
+       # $feature{'show-sizes'}{'default'} = [0];
+       # To have project specific config enable override in $GITWEB_CONFIG
+       # $feature{'show-sizes'}{'override'} = 1;
+       # and in project config gitweb.showsizes = 0|1;
+       'show-sizes' => {
+               'sub' => sub { feature_bool('showsizes', @_) },
+               '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
@@ -365,6 +404,41 @@ BEGIN
                'sub' => \&feature_patches,
                'override' => 0,
                'default' => [16]},
+
+       # Avatar support. When this feature is enabled, views such as
+       # shortlog or commit will display an avatar associated with
+       # the email of the committer(s) and/or author(s).
+
+       # Currently available providers are gravatar and picon.
+       # If an unknown provider is specified, the feature is disabled.
+
+       # Gravatar depends on Digest::MD5.
+       # Picon currently relies on the indiana.edu database.
+
+       # To enable system wide have in $GITWEB_CONFIG
+       # $feature{'avatar'}{'default'} = ['<provider>'];
+       # where <provider> is either gravatar or picon.
+       # To have project specific config enable override in $GITWEB_CONFIG
+       # $feature{'avatar'}{'override'} = 1;
+       # and in project config gitweb.avatar = <provider>;
+       'avatar' => {
+               'sub' => \&feature_avatar,
+               'override' => 0,
+               'default' => ['']},
+
+       # Enable displaying how much time and how many git commands
+       # it took to generate and display page.  Disabled by default.
+       # Project specific override is not supported.
+       'timed' => {
+               'override' => 0,
+               'default' => [0]},
+
+       # Enable turning some links into links to actions which require
+       # JavaScript to run (like 'blame_incremental').  Not enabled by
+       # default.  Project specific override is currently not supported.
+       'javascript-actions' => {
+               'override' => 0,
+               'default' => [0]},
 );
 
 sub gitweb_get_feature {
@@ -433,6 +507,12 @@ sub feature_patches {
        return ($_[0]);
 }
 
+sub feature_avatar {
+       my @val = (git_get_project_config('avatar'));
+
+       return @val ? @val : @_;
+}
+
 # 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.
@@ -458,8 +538,9 @@ sub filter_snapshot_fmts {
        @fmts = map {
                exists $known_snapshot_format_aliases{$_} ?
                       $known_snapshot_format_aliases{$_} : $_} @fmts;
-       @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
-
+       @fmts = grep {
+               exists $known_snapshot_formats{$_} &&
+               !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 }
 
 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
@@ -472,6 +553,7 @@ sub filter_snapshot_fmts {
 
 # version of the core git binary
 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
+$number_of_git_cmds++;
 
 $projects_list ||= $projectroot;
 
@@ -509,12 +591,16 @@ sub filter_snapshot_fmts {
        snapshot_format => "sf",
        extra_options => "opt",
        search_use_regexp => "sr",
+       # this must be last entry (for manipulation from JavaScript)
+       javascript => "js"
 );
 our %cgi_param_mapping = @cgi_param_mapping;
 
 # we will also need to know the possible actions, for validation
 our %actions = (
        "blame" => \&git_blame,
+       "blame_incremental" => \&git_blame_incremental,
+       "blame_data" => \&git_blame_data,
        "blobdiff" => \&git_blobdiff,
        "blobdiff_plain" => \&git_blobdiff_plain,
        "blob" => \&git_blob,
@@ -688,11 +774,12 @@ sub evaluate_path_info {
                # extensions. Allowed extensions are both the defined suffix
                # (which includes the initial dot already) and the snapshot
                # format key itself, with a prepended dot
-               while (my ($fmt, %opt) = each %known_snapshot_formats) {
+               while (my ($fmt, $opt) = each %known_snapshot_formats) {
                        my $hash = $refname;
-                       my $sfx;
-                       $hash =~ s/(\Q$opt{'suffix'}\E|\Q.$fmt\E)$//;
-                       next unless $sfx = $1;
+                       unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
+                               next;
+                       }
+                       my $sfx = $1;
                        # a valid suffix was found, so set the snapshot format
                        # and reset the hash parameter
                        $input_params{'snapshot_format'} = $fmt;
@@ -813,6 +900,19 @@ sub evaluate_path_info {
 our @snapshot_fmts = gitweb_get_feature('snapshot');
 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 
+# check that the avatar feature is set to a known provider name,
+# and for each provider check if the dependencies are satisfied.
+# if the provider name is invalid or the dependencies are not met,
+# reset $git_avatar to the empty string.
+our ($git_avatar) = gitweb_get_feature('avatar');
+if ($git_avatar eq 'gravatar') {
+       $git_avatar = '' unless (eval { require Digest::MD5; 1; });
+} elsif ($git_avatar eq 'picon') {
+       # no dependencies
+} else {
+       $git_avatar = '';
+}
+
 # dispatch
 if (!defined $action) {
        if (defined $hash) {
@@ -828,7 +928,7 @@ sub evaluate_path_info {
 if (!defined($actions{$action})) {
        die_error(400, "Unknown action");
 }
-if ($action !~ m/^(opml|project_list|project_index)$/ &&
+if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
     !$project) {
        die_error(400, "Project needed");
 }
@@ -838,7 +938,7 @@ sub evaluate_path_info {
 ## ======================================================================
 ## action links
 
-sub href (%) {
+sub href {
        my %params = @_;
        # default is to use -absolute url() i.e. $my_uri
        my $href = $params{-full} ? $my_url : $my_uri;
@@ -891,10 +991,13 @@ (%)
                        if (defined $params{'hash_parent_base'}) {
                                $href .= esc_url($params{'hash_parent_base'});
                                # skip the file_parent if it's the same as the file_name
-                               delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
-                               if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
-                                       $href .= ":/".esc_url($params{'file_parent'});
-                                       delete $params{'file_parent'};
+                               if (defined $params{'file_parent'}) {
+                                       if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
+                                               delete $params{'file_parent'};
+                                       } elsif ($params{'file_parent'} !~ /\.\./) {
+                                               $href .= ":/".esc_url($params{'file_parent'});
+                                               delete $params{'file_parent'};
+                                       }
                                }
                                $href .= "..";
                                delete $params{'hash_parent'};
@@ -1020,8 +1123,7 @@ sub to_utf8 {
 # correct, but quoted slashes look too horrible in bookmarks
 sub esc_param {
        my $str = shift;
-       $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
-       $str =~ s/\+/%2B/g;
+       $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
        $str =~ s/ /\+/g;
        return $str;
 }
@@ -1036,7 +1138,7 @@ sub esc_url {
 }
 
 # replace invalid utf8 character with SUBSTITUTION sequence
-sub esc_html ($;%) {
+sub esc_html {
        my $str = shift;
        my %opts = @_;
 
@@ -1235,7 +1337,7 @@ sub chop_and_escape_str {
        if ($chopped eq $str) {
                return esc_html($chopped);
        } else {
-               $str =~ s/([[:cntrl:]])/?/g;
+               $str =~ s/[[:cntrl:]]/?/g;
                return $cgi->span({-title=>$str}, esc_html($chopped));
        }
 }
@@ -1296,7 +1398,7 @@ sub age_string {
 };
 
 # submodule/subproject, a commit object reference
-sub S_ISGITLINK($) {
+sub S_ISGITLINK {
        my $mode = shift;
 
        return (($mode & S_IFMT) == S_IFGITLINK)
@@ -1458,15 +1560,117 @@ sub format_subject_html {
        $extra = '' unless defined($extra);
 
        if (length($short) < length($long)) {
+               $long =~ s/[[:cntrl:]]/?/g;
                return $cgi->a({-href => $href, -class => "list subject",
                                -title => to_utf8($long)},
-                      esc_html($short) . $extra);
+                      esc_html($short)) . $extra;
        } else {
                return $cgi->a({-href => $href, -class => "list subject"},
-                      esc_html($long)  . $extra);
+                      esc_html($long)) . $extra;
+       }
+}
+
+# Rather than recomputing the url for an email multiple times, we cache it
+# after the first hit. This gives a visible benefit in views where the avatar
+# for the same email is used repeatedly (e.g. shortlog).
+# The cache is shared by all avatar engines (currently gravatar only), which
+# are free to use it as preferred. Since only one avatar engine is used for any
+# given page, there's no risk for cache conflicts.
+our %avatar_cache = ();
+
+# Compute the picon url for a given email, by using the picon search service over at
+# http://www.cs.indiana.edu/picons/search.html
+sub picon_url {
+       my $email = lc shift;
+       if (!$avatar_cache{$email}) {
+               my ($user, $domain) = split('@', $email);
+               $avatar_cache{$email} =
+                       "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
+                       "$domain/$user/" .
+                       "users+domains+unknown/up/single";
+       }
+       return $avatar_cache{$email};
+}
+
+# Compute the gravatar url for a given email, if it's not in the cache already.
+# Gravatar stores only the part of the URL before the size, since that's the
+# one computationally more expensive. This also allows reuse of the cache for
+# different sizes (for this particular engine).
+sub gravatar_url {
+       my $email = lc shift;
+       my $size = shift;
+       $avatar_cache{$email} ||=
+               "http://www.gravatar.com/avatar/" .
+                       Digest::MD5::md5_hex($email) . "?s=";
+       return $avatar_cache{$email} . $size;
+}
+
+# Insert an avatar for the given $email at the given $size if the feature
+# is enabled.
+sub git_get_avatar {
+       my ($email, %opts) = @_;
+       my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
+       my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
+       $opts{-size} ||= 'default';
+       my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
+       my $url = "";
+       if ($git_avatar eq 'gravatar') {
+               $url = gravatar_url($email, $size);
+       } elsif ($git_avatar eq 'picon') {
+               $url = picon_url($email);
+       }
+       # Other providers can be added by extending the if chain, defining $url
+       # as needed. If no variant puts something in $url, we assume avatars
+       # are completely disabled/unavailable.
+       if ($url) {
+               return $pre_white .
+                      "<img width=\"$size\" " .
+                           "class=\"avatar\" " .
+                           "src=\"$url\" " .
+                           "alt=\"\" " .
+                      "/>" . $post_white;
+       } else {
+               return "";
        }
 }
 
+sub format_search_author {
+       my ($author, $searchtype, $displaytext) = @_;
+       my $have_search = gitweb_check_feature('search');
+
+       if ($have_search) {
+               my $performed = "";
+               if ($searchtype eq 'author') {
+                       $performed = "authored";
+               } elsif ($searchtype eq 'committer') {
+                       $performed = "committed";
+               }
+
+               return $cgi->a({-href => href(action=>"search", hash=>$hash,
+                               searchtext=>$author,
+                               searchtype=>$searchtype), class=>"list",
+                               title=>"Search for commits $performed by $author"},
+                               $displaytext);
+
+       } else {
+               return $displaytext;
+       }
+}
+
+# format the author name of the given commit with the given tag
+# the author name is chopped and escaped according to the other
+# optional parameters (see chop_str).
+sub format_author_html {
+       my $tag = shift;
+       my $co = shift;
+       my $author = chop_and_escape_str($co->{'author_name'}, @_);
+       return "<$tag class=\"author\">" .
+              format_search_author($co->{'author_name'}, "author",
+                      git_get_avatar($co->{'author_email'}, -pad_after => 1) .
+                      $author) .
+              "</$tag>";
+}
+
 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
 sub format_git_diff_header_line {
        my $line = shift;
@@ -1829,6 +2033,7 @@ sub get_feed_info {
 
 # returns path to the core git executable and the --git-dir parameter as list
 sub git_cmd {
+       $number_of_git_cmds++;
        return $GIT, '--git-dir='.$git_dir;
 }
 
@@ -1838,21 +2043,32 @@ sub git_cmd {
 # Try to avoid using this function wherever possible.
 sub quote_command {
        return join(' ',
-                   map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
+               map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
 }
 
 # get HEAD ref of given project as hash
 sub git_get_head_hash {
-       my $project = shift;
+       return git_get_full_hash(shift, 'HEAD');
+}
+
+sub git_get_full_hash {
+       return git_get_hash(@_);
+}
+
+sub git_get_short_hash {
+       return git_get_hash(@_, '--short=7');
+}
+
+sub git_get_hash {
+       my ($project, $hash, @options) = @_;
        my $o_git_dir = $git_dir;
        my $retval = undef;
        $git_dir = "$projectroot/$project";
-       if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
-               my $head = <$fd>;
+       if (open my $fd, '-|', git_cmd(), 'rev-parse',
+           '--verify', '-q', @options, $hash) {
+               $retval = <$fd>;
+               chomp $retval if defined $retval;
                close $fd;
-               if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
-                       $retval = $1;
-               }
        }
        if (defined $o_git_dir) {
                $git_dir = $o_git_dir;
@@ -2050,7 +2266,7 @@ sub git_get_project_description {
        my $path = shift;
 
        $git_dir = "$projectroot/$path";
-       open my $fd, "$git_dir/description"
+       open my $fd, '<', "$git_dir/description"
                or return git_get_project_config('description');
        my $descr = <$fd>;
        close $fd;
@@ -2065,18 +2281,17 @@ sub git_get_project_ctags {
        my $ctags = {};
 
        $git_dir = "$projectroot/$path";
-       unless (opendir D, "$git_dir/ctags") {
-               return $ctags;
-       }
-       foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
-               open CT, $_ or next;
-               my $val = <CT>;
+       opendir my $dh, "$git_dir/ctags"
+               or return $ctags;
+       foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
+               open my $ct, '<', $_ or next;
+               my $val = <$ct>;
                chomp $val;
-               close CT;
+               close $ct;
                my $ctag = $_; $ctag =~ s#.*/##;
                $ctags->{$ctag} = $val;
        }
-       closedir D;
+       closedir $dh;
        $ctags;
 }
 
@@ -2129,7 +2344,7 @@ sub git_get_project_url_list {
        my $path = shift;
 
        $git_dir = "$projectroot/$path";
-       open my $fd, "$git_dir/cloneurl"
+       open my $fd, '<', "$git_dir/cloneurl"
                or return wantarray ?
                @{ config_to_multi(git_get_project_config('url')) } :
                   config_to_multi(git_get_project_config('url'));
@@ -2187,7 +2402,7 @@ sub git_get_projects_list {
                # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
                # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
                my %paths;
-               open my ($fd), $projects_list or return;
+               open my $fd, '<', $projects_list or return;
        PROJECT:
                while (my $line = <$fd>) {
                        chomp $line;
@@ -2250,7 +2465,7 @@ sub git_get_project_list_from_file {
        # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
        # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
        if (-f $projects_list) {
-               open (my $fd , $projects_list);
+               open(my $fd, '<', $projects_list);
                while (my $line = <$fd>) {
                        chomp $line;
                        my ($pr, $ow) = split ' ', $line;
@@ -2398,8 +2613,14 @@ sub parse_tag {
                        $tag{'name'} = $1;
                } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
                        $tag{'author'} = $1;
-                       $tag{'epoch'} = $2;
-                       $tag{'tz'} = $3;
+                       $tag{'author_epoch'} = $2;
+                       $tag{'author_tz'} = $3;
+                       if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
+                               $tag{'author_name'}  = $1;
+                               $tag{'author_email'} = $2;
+                       } else {
+                               $tag{'author_name'} = $tag{'author'};
+                       }
                } elsif ($line =~ m/--BEGIN/) {
                        push @comment, $line;
                        last;
@@ -2439,7 +2660,7 @@ sub parse_commit_text {
                } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
                        push @parents, $1;
                } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
-                       $co{'author'} = $1;
+                       $co{'author'} = to_utf8($1);
                        $co{'author_epoch'} = $2;
                        $co{'author_tz'} = $3;
                        if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
@@ -2449,10 +2670,9 @@ sub parse_commit_text {
                                $co{'author_name'} = $co{'author'};
                        }
                } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
-                       $co{'committer'} = $1;
+                       $co{'committer'} = to_utf8($1);
                        $co{'committer_epoch'} = $2;
                        $co{'committer_tz'} = $3;
-                       $co{'committer_name'} = $co{'committer'};
                        if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
                                $co{'committer_name'}  = $1;
                                $co{'committer_email'} = $2;
@@ -2615,21 +2835,36 @@ sub parsed_difftree_line {
 }
 
 # parse line of git-ls-tree output
-sub parse_ls_tree_line ($;%) {
+sub parse_ls_tree_line {
        my $line = shift;
        my %opts = @_;
        my %res;
 
-       #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
-       $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
+       if ($opts{'-l'}) {
+               #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
+               $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
 
-       $res{'mode'} = $1;
-       $res{'type'} = $2;
-       $res{'hash'} = $3;
-       if ($opts{'-z'}) {
-               $res{'name'} = $4;
+               $res{'mode'} = $1;
+               $res{'type'} = $2;
+               $res{'hash'} = $3;
+               $res{'size'} = $4;
+               if ($opts{'-z'}) {
+                       $res{'name'} = $5;
+               } else {
+                       $res{'name'} = unquote($5);
+               }
        } else {
-               $res{'name'} = unquote($4);
+               #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
+               $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
+
+               $res{'mode'} = $1;
+               $res{'type'} = $2;
+               $res{'hash'} = $3;
+               if ($opts{'-z'}) {
+                       $res{'name'} = $4;
+               } else {
+                       $res{'name'} = unquote($4);
+               }
        }
 
        return wantarray ? %res : \%res;
@@ -2804,18 +3039,18 @@ sub mimetype_guess_file {
        -r $mimemap or return undef;
 
        my %mimemap;
-       open(MIME, $mimemap) or return undef;
-       while (<MIME>) {
+       open(my $mh, '<', $mimemap) or return undef;
+       while (<$mh>) {
                next if m/^#/; # skip comments
-               my ($mime, $exts) = split(/\t+/);
+               my ($mimetype, $exts) = split(/\t+/);
                if (defined $exts) {
                        my @exts = split(/\s+/, $exts);
                        foreach my $ext (@exts) {
-                               $mimemap{$ext} = $mime;
+                               $mimemap{$ext} = $mimetype;
                        }
                }
        }
-       close(MIME);
+       close($mh);
 
        $filename =~ /\.([^.]*)$/;
        return $mimemap{$1};
@@ -3074,10 +3309,36 @@ sub git_footer_html {
        }
        print "</div>\n"; # class="page_footer"
 
+       if (defined $t0 && gitweb_check_feature('timed')) {
+               print "<div id=\"generating_info\">\n";
+               print 'This page took '.
+                     '<span id="generating_time" class="time_span">'.
+                     Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
+                     ' seconds </span>'.
+                     ' and '.
+                     '<span id="generating_cmd">'.
+                     $number_of_git_cmds.
+                     '</span> git commands '.
+                     " to generate.\n";
+               print "</div>\n"; # class="page_footer"
+       }
+
        if (-f $site_footer) {
                insert_file($site_footer);
        }
 
+       print qq!<script type="text/javascript" src="$javascript"></script>\n!;
+       if ($action eq 'blame_incremental') {
+               print qq!<script type="text/javascript">\n!.
+                     qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
+                     qq!           "!. href() .qq!");\n!.
+                     qq!</script>\n!;
+       } elsif (gitweb_check_feature('javascript-actions')) {
+               print qq!<script type="text/javascript">\n!.
+                     qq!window.onload = fixLinks;\n!.
+                     qq!</script>\n!;
+       }
+
        print "</body>\n" .
              "</html>";
 }
@@ -3167,22 +3428,18 @@ sub git_print_page_nav {
 }
 
 sub format_paging_nav {
-       my ($action, $hash, $head, $page, $has_next_link) = @_;
+       my ($action, $page, $has_next_link) = @_;
        my $paging_nav;
 
 
-       if ($hash ne $head || $page) {
-               $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
-       } else {
-               $paging_nav .= "HEAD";
-       }
-
        if ($page > 0) {
-               $paging_nav .= " &sdot; " .
+               $paging_nav .=
+                       $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
+                       " &sdot; " .
                        $cgi->a({-href => href(-replay=>1, page=>$page-1),
                                 -accesskey => "p", -title => "Alt-p"}, "prev");
        } else {
-               $paging_nav .= " &sdot; prev";
+               $paging_nav .= "first &sdot; prev";
        }
 
        if ($has_next_link) {
@@ -3213,22 +3470,59 @@ sub git_print_header_div {
              "\n</div>\n";
 }
 
-#sub git_print_authorship (\%) {
+sub print_local_time {
+       my %date = @_;
+       if ($date{'hour_local'} < 6) {
+               printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
+                       $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
+       } else {
+               printf(" (%02d:%02d %s)",
+                       $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
+       }
+}
+
+# Outputs the author name and date in long form
 sub git_print_authorship {
        my $co = shift;
+       my %opts = @_;
+       my $tag = $opts{-tag} || 'div';
+       my $author = $co->{'author_name'};
 
        my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
-       print "<div class=\"author_date\">" .
-             esc_html($co->{'author_name'}) .
+       print "<$tag class=\"author_date\">" .
+             format_search_author($author, "author", esc_html($author)) .
              " [$ad{'rfc2822'}";
-       if ($ad{'hour_local'} < 6) {
-               printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
-                      $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
-       } else {
-               printf(" (%02d:%02d %s)",
-                      $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
+       print_local_time(%ad) if ($opts{-localtime});
+       print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
+                 . "</$tag>\n";
+}
+
+# Outputs table rows containing the full author or committer information,
+# in the format expected for 'commit' view (& similia).
+# Parameters are a commit hash reference, followed by the list of people
+# to output information for. If the list is empty it defalts to both
+# author and committer.
+sub git_print_authorship_rows {
+       my $co = shift;
+       # too bad we can't use @people = @_ || ('author', 'committer')
+       my @people = @_;
+       @people = ('author', 'committer') unless @people;
+       foreach my $who (@people) {
+               my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
+               print "<tr><td>$who</td><td>" .
+                     format_search_author($co->{"${who}_name"}, $who,
+                              esc_html($co->{"${who}_name"})) . " " .
+                     format_search_author($co->{"${who}_email"}, $who,
+                              esc_html("<" . $co->{"${who}_email"} . ">")) .
+                     "</td><td rowspan=\"2\">" .
+                     git_get_avatar($co->{"${who}_email"}, -size => 'double') .
+                     "</td></tr>\n" .
+                     "<tr>" .
+                     "<td></td><td> $wd{'rfc2822'}";
+               print_local_time(%wd);
+               print "</td>" .
+                     "</tr>\n";
        }
-       print "]</div>\n";
 }
 
 sub git_print_page_path {
@@ -3269,8 +3563,7 @@ sub git_print_page_path {
        print "<br/></div>\n";
 }
 
-# sub git_print_log (\@;%) {
-sub git_print_log ($;%) {
+sub git_print_log {
        my $log = shift;
        my %opts = @_;
 
@@ -3328,7 +3621,7 @@ sub git_get_link_target {
        open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
                or return;
        {
-               local $/;
+               local $/ = undef;
                $link_target = <$fd>;
        }
        close $fd
@@ -3341,10 +3634,7 @@ sub git_get_link_target {
 # return target of link relative to top directory (top tree);
 # return undef if it is not possible (including absolute links).
 sub normalize_link_target {
-       my ($link_target, $basedir, $hash_base) = @_;
-
-       # we can normalize symlink target only if $hash_base is provided
-       return unless $hash_base;
+       my ($link_target, $basedir) = @_;
 
        # absolute symlinks (beginning with '/') cannot be normalized
        return if (substr($link_target, 0, 1) eq '/');
@@ -3392,6 +3682,9 @@ sub git_print_tree_entry {
        # and link is the action links of the entry.
 
        print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
+       if (exists $t->{'size'}) {
+               print "<td class=\"size\">$t->{'size'}</td>\n";
+       }
        if ($t->{'type'} eq "blob") {
                print "<td class=\"list\">" .
                        $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
@@ -3400,7 +3693,7 @@ sub git_print_tree_entry {
                if (S_ISLNK(oct $t->{'mode'})) {
                        my $link_target = git_get_link_target($t->{'hash'});
                        if ($link_target) {
-                               my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
+                               my $norm_target = normalize_link_target($link_target, $basedir);
                                if (defined $norm_target) {
                                        print " -> " .
                                              $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
@@ -3437,12 +3730,14 @@ sub git_print_tree_entry {
        } 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)},
+                                            file_name=>"$basedir$t->{'name'}",
+                                            %base_key)},
                              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)},
+                                            file_name=>"$basedir$t->{'name'}",
+                                            %base_key)},
                              "tree");
                if (defined $hash_base) {
                        print " | " .
@@ -3993,7 +4288,7 @@ sub fill_project_list_info {
                            ($pname !~ /\/$/) &&
                            (-d "$projectroot/$pname")) {
                                $pr->{'forks'} = "-d $projectroot/$pname";
-                       }       else {
+                       } else {
                                $pr->{'forks'} = 0;
                        }
                }
@@ -4127,6 +4422,46 @@ sub git_project_list_body {
        print "</table>\n";
 }
 
+sub git_log_body {
+       # uses global variable $project
+       my ($commitlist, $from, $to, $refs, $extra) = @_;
+
+       $from = 0 unless defined $from;
+       $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
+
+       for (my $i = 0; $i <= $to; $i++) {
+               my %co = %{$commitlist->[$i]};
+               next if !%co;
+               my $commit = $co{'id'};
+               my $ref = format_ref_marker($refs, $commit);
+               my %ad = parse_date($co{'author_epoch'});
+               git_print_header_div('commit',
+                              "<span class=\"age\">$co{'age_string'}</span>" .
+                              esc_html($co{'title'}) . $ref,
+                              $commit);
+               print "<div class=\"title_text\">\n" .
+                     "<div class=\"log_link\">\n" .
+                     $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
+                     " | " .
+                     $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
+                     " | " .
+                     $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
+                     "<br/>\n" .
+                     "</div>\n";
+                     git_print_authorship(\%co, -tag => 'span');
+                     print "<br/>\n</div>\n";
+
+               print "<div class=\"log_body\">\n";
+               git_print_log($co{'comment'}, -final_empty_line=> 1);
+               print "</div>\n";
+       }
+       if ($extra) {
+               print "<div class=\"page_nav\">\n";
+               print "$extra\n";
+               print "</div>\n";
+       }
+}
+
 sub git_shortlog_body {
        # uses global variable $project
        my ($commitlist, $from, $to, $refs, $extra) = @_;
@@ -4146,11 +4481,9 @@ sub git_shortlog_body {
                        print "<tr class=\"light\">\n";
                }
                $alternate ^= 1;
-               my $author = chop_and_escape_str($co{'author_name'}, 10);
                # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
-                     "<td><i>" . $author . "</i></td>\n" .
-                     "<td>";
+                     format_author_html('td', \%co, 10) . "<td>";
                print format_subject_html($co{'title'}, $co{'title_short'},
                                          href(action=>"commit", hash=>$commit), $ref);
                print "</td>\n" .
@@ -4175,7 +4508,8 @@ sub git_shortlog_body {
 
 sub git_history_body {
        # Warning: assumes constant type (blob or tree) during history
-       my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
+       my ($commitlist, $from, $to, $refs, $extra,
+           $file_name, $file_hash, $ftype) = @_;
 
        $from = 0 unless defined $from;
        $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
@@ -4197,11 +4531,9 @@ sub git_history_body {
                        print "<tr class=\"light\">\n";
                }
                $alternate ^= 1;
-       # shortlog uses      chop_str($co{'author_name'}, 10)
-               my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
-                     "<td><i>" . $author . "</i></td>\n" .
-                     "<td>";
+       # shortlog:   format_author_html('td', \%co, 10)
+                     format_author_html('td', \%co, 15, 3) . "<td>";
                # originally git_history used chop_str($co{'title'}, 50)
                print format_subject_html($co{'title'}, $co{'title_short'},
                                          href(action=>"commit", hash=>$commit), $ref);
@@ -4211,7 +4543,7 @@ sub git_history_body {
                      $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
 
                if ($ftype eq 'blob') {
-                       my $blob_current = git_get_hash_by_path($hash_base, $file_name);
+                       my $blob_current = $file_hash;
                        my $blob_parent  = git_get_hash_by_path($commit, $file_name);
                        if (defined $blob_current && defined $blob_parent &&
                                        $blob_current ne $blob_parent) {
@@ -4354,9 +4686,8 @@ sub git_search_grep_body {
                        print "<tr class=\"light\">\n";
                }
                $alternate ^= 1;
-               my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
                print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
-                     "<td><i>" . $author . "</i></td>\n" .
+                     format_author_html('td', \%co, 15, 5) .
                      "<td>" .
                      $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
                               -class => "list subject"},
@@ -4590,11 +4921,7 @@ sub git_tag {
                                              $tag{'type'}) . "</td>\n" .
              "</tr>\n";
        if (defined($tag{'author'})) {
-               my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
-               print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
-               print "<tr><td></td><td>" . $ad{'rfc2822'} .
-                       sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
-                       "</td></tr>\n";
+               git_print_authorship_rows(\%tag, 'author');
        }
        print "</table>\n\n" .
              "</div>\n";
@@ -4608,7 +4935,13 @@ sub git_tag {
        git_footer_html();
 }
 
-sub git_blame {
+sub git_blame_common {
+       my $format = shift || 'porcelain';
+       if ($format eq 'porcelain' && $cgi->param('js')) {
+               $format = 'incremental';
+               $action = 'blame_incremental'; # for page title etc
+       }
+
        # permissions
        gitweb_check_feature('blame')
                or die_error(403, "Blame view not allowed");
@@ -4630,107 +4963,220 @@ sub git_blame {
                }
        }
 
-       # run git-blame --porcelain
-       open my $fd, "-|", git_cmd(), "blame", '-p',
-               $hash_base, '--', $file_name
-               or die_error(500, "Open git-blame failed");
+       my $fd;
+       if ($format eq 'incremental') {
+               # get file contents (as base)
+               open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
+                       or die_error(500, "Open git-cat-file failed");
+       } elsif ($format eq 'data') {
+               # run git-blame --incremental
+               open $fd, "-|", git_cmd(), "blame", "--incremental",
+                       $hash_base, "--", $file_name
+                       or die_error(500, "Open git-blame --incremental failed");
+       } else {
+               # run git-blame --porcelain
+               open $fd, "-|", git_cmd(), "blame", '-p',
+                       $hash_base, '--', $file_name
+                       or die_error(500, "Open git-blame --porcelain failed");
+       }
+
+       # incremental blame data returns early
+       if ($format eq 'data') {
+               print $cgi->header(
+                       -type=>"text/plain", -charset => "utf-8",
+                       -status=> "200 OK");
+               local $| = 1; # output autoflush
+               print while <$fd>;
+               close $fd
+                       or print "ERROR $!\n";
+
+               print 'END';
+               if (defined $t0 && gitweb_check_feature('timed')) {
+                       print ' '.
+                             Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
+                             ' '.$number_of_git_cmds;
+               }
+               print "\n";
+
+               return;
+       }
 
        # page header
        git_header_html();
        my $formats_nav =
                $cgi->a({-href => href(action=>"blob", -replay=>1)},
                        "blob") .
+               " | ";
+       if ($format eq 'incremental') {
+               $formats_nav .=
+                       $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
+                               "blame") . " (non-incremental)";
+       } else {
+               $formats_nav .=
+                       $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
+                               "blame") . " (incremental)";
+       }
+       $formats_nav .=
                " | " .
                $cgi->a({-href => href(action=>"history", -replay=>1)},
                        "history") .
                " | " .
-               $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
+               $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
                        "HEAD");
        git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
        git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
        git_print_page_path($file_name, $ftype, $hash_base);
 
        # page body
-       my @rev_color = qw(light2 dark2);
+       if ($format eq 'incremental') {
+               print "<noscript>\n<div class=\"error\"><center><b>\n".
+                     "This page requires JavaScript to run.\n Use ".
+                     $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
+                             'this page').
+                     " instead.\n".
+                     "</b></center></div>\n</noscript>\n";
+
+               print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
+       }
+
+       print qq!<div class="page_body">\n!;
+       print qq!<div id="progress_info">... / ...</div>\n!
+               if ($format eq 'incremental');
+       print qq!<table id="blame_table" class="blame" width="100%">\n!.
+             #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
+             qq!<thead>\n!.
+             qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
+             qq!</thead>\n!.
+             qq!<tbody>\n!;
+
+       my @rev_color = qw(light dark);
        my $num_colors = scalar(@rev_color);
        my $current_color = 0;
-       my %metainfo = ();
 
-       print <<HTML;
-<div class="page_body">
-<table class="blame">
-<tr><th>Commit</th><th>Line</th><th>Data</th></tr>
-HTML
- LINE:
-       while (my $line = <$fd>) {
-               chomp $line;
-               # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
-               # no <lines in group> for subsequent lines in group of lines
-               my ($full_rev, $orig_lineno, $lineno, $group_size) =
-                  ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
-               if (!exists $metainfo{$full_rev}) {
-                       $metainfo{$full_rev} = {};
-               }
-               my $meta = $metainfo{$full_rev};
-               my $data;
-               while ($data = <$fd>) {
-                       chomp $data;
-                       last if ($data =~ s/^\t//); # contents of line
-                       if ($data =~ /^(\S+) (.*)$/) {
-                               $meta->{$1} = $2;
-                       }
-               }
-               my $short_rev = substr($full_rev, 0, 8);
-               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 + 1) % $num_colors;
-               }
-               print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\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=>$file_name)},
-                                     esc_html($short_rev));
-                       print "</td>\n";
+       if ($format eq 'incremental') {
+               my $color_class = $rev_color[$current_color];
+
+               #contents of a file
+               my $linenr = 0;
+       LINE:
+               while (my $line = <$fd>) {
+                       chomp $line;
+                       $linenr++;
+
+                       print qq!<tr id="l$linenr" class="$color_class">!.
+                             qq!<td class="sha1"><a href=""> </a></td>!.
+                             qq!<td class="linenr">!.
+                             qq!<a class="linenr" href="">$linenr</a></td>!;
+                       print qq!<td class="pre">! . esc_html($line) . "</td>\n";
+                       print qq!</tr>\n!;
                }
-               my $parent_commit;
-               if (!exists $meta->{'parent'}) {
-                       open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
-                               or die_error(500, "Open git-rev-parse failed");
-                       $parent_commit = <$dd>;
-                       close $dd;
-                       chomp($parent_commit);
-                       $meta->{'parent'} = $parent_commit;
-               } else {
-                       $parent_commit = $meta->{'parent'};
-               }
-               my $blamed = href(action => 'blame',
-                                 file_name => $meta->{'filename'},
-                                 hash_base => $parent_commit);
-               print "<td class=\"linenr\">";
-               print $cgi->a({ -href => "$blamed#l$orig_lineno",
-                               -class => "linenr" },
-                             esc_html($lineno));
-               print "</td>";
-               print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
-               print "</tr>\n";
+
+       } else { # porcelain, i.e. ordinary blame
+               my %metainfo = (); # saves information about commits
+
+               # blame data
+       LINE:
+               while (my $line = <$fd>) {
+                       chomp $line;
+                       # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
+                       # no <lines in group> for subsequent lines in group of lines
+                       my ($full_rev, $orig_lineno, $lineno, $group_size) =
+                          ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
+                       if (!exists $metainfo{$full_rev}) {
+                               $metainfo{$full_rev} = { 'nprevious' => 0 };
+                       }
+                       my $meta = $metainfo{$full_rev};
+                       my $data;
+                       while ($data = <$fd>) {
+                               chomp $data;
+                               last if ($data =~ s/^\t//); # contents of line
+                               if ($data =~ /^(\S+)(?: (.*))?$/) {
+                                       $meta->{$1} = $2 unless exists $meta->{$1};
+                               }
+                               if ($data =~ /^previous /) {
+                                       $meta->{'nprevious'}++;
+                               }
+                       }
+                       my $short_rev = substr($full_rev, 0, 8);
+                       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 + 1) % $num_colors;
+                       }
+                       my $tr_class = $rev_color[$current_color];
+                       $tr_class .= ' boundary' if (exists $meta->{'boundary'});
+                       $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
+                       $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
+                       print "<tr id=\"l$lineno\" class=\"$tr_class\">\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=>$file_name)},
+                                             esc_html($short_rev));
+                               if ($group_size >= 2) {
+                                       my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
+                                       if (@author_initials) {
+                                               print "<br />" .
+                                                     esc_html(join('', @author_initials));
+                                               #           or join('.', ...)
+                                       }
+                               }
+                               print "</td>\n";
+                       }
+                       # 'previous' <sha1 of parent commit> <filename at commit>
+                       if (exists $meta->{'previous'} &&
+                           $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
+                               $meta->{'parent'} = $1;
+                               $meta->{'file_parent'} = unquote($2);
+                       }
+                       my $linenr_commit =
+                               exists($meta->{'parent'}) ?
+                               $meta->{'parent'} : $full_rev;
+                       my $linenr_filename =
+                               exists($meta->{'file_parent'}) ?
+                               $meta->{'file_parent'} : unquote($meta->{'filename'});
+                       my $blamed = href(action => 'blame',
+                                         file_name => $linenr_filename,
+                                         hash_base => $linenr_commit);
+                       print "<td class=\"linenr\">";
+                       print $cgi->a({ -href => "$blamed#l$orig_lineno",
+                                       -class => "linenr" },
+                                     esc_html($lineno));
+                       print "</td>";
+                       print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
+                       print "</tr>\n";
+               } # end while
+
        }
-       print "</table>\n";
-       print "</div>";
+
+       # footer
+       print "</tbody>\n".
+             "</table>\n"; # class="blame"
+       print "</div>\n";   # class="blame_body"
        close $fd
                or print "Reading blob failed\n";
 
-       # page footer
        git_footer_html();
 }
 
+sub git_blame {
+       git_blame_common();
+}
+
+sub git_blame_incremental {
+       git_blame_common('incremental');
+}
+
+sub git_blame_data {
+       git_blame_common('data');
+}
+
 sub git_tags {
        my $head = git_get_head_hash($project);
        git_header_html();
@@ -4803,11 +5249,10 @@ sub git_blob_plain {
                -content_disposition =>
                        ($sandbox ? 'attachment' : 'inline')
                        . '; filename="' . $save_as . '"');
-       undef $/;
+       local $/ = undef;
        binmode STDOUT, ':raw';
        print <$fd>;
        binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
-       $/ = "\n";
        close $fd;
 }
 
@@ -4887,7 +5332,8 @@ sub git_blob {
                        chomp $line;
                        $nr++;
                        $line = untabify($line);
-                       printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
+                       printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
+                               . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
                               $nr, $nr, $nr, esc_html($line, -nbsp=>1);
                }
        }
@@ -4909,18 +5355,25 @@ sub git_tree {
                }
        }
        die_error(404, "No such tree") unless defined($hash);
-       $/ = "\0";
-       open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
-               or die_error(500, "Open git-ls-tree failed");
-       my @entries = map { chomp; $_ } <$fd>;
-       close $fd or die_error(404, "Reading tree failed");
-       $/ = "\n";
+
+       my $show_sizes = gitweb_check_feature('show-sizes');
+       my $have_blame = gitweb_check_feature('blame');
+
+       my @entries = ();
+       {
+               local $/ = "\0";
+               open my $fd, "-|", git_cmd(), "ls-tree", '-z',
+                       ($show_sizes ? '-l' : ()), @extra_options, $hash
+                       or die_error(500, "Open git-ls-tree failed");
+               @entries = map { chomp; $_ } <$fd>;
+               close $fd
+                       or die_error(404, "Reading tree failed");
+       }
 
        my $refs = git_get_references();
        my $ref = format_ref_marker($refs, $hash_base);
        git_header_html();
        my $basedir = '';
-       my $have_blame = gitweb_check_feature('blame');
        if (defined $hash_base && (my %co = parse_commit($hash_base))) {
                my @views_nav = ();
                if (defined $file_name) {
@@ -4936,7 +5389,8 @@ sub git_tree {
                        # FIXME: Should be available when we have no hash base as well.
                        push @views_nav, $snapshot_links;
                }
-               git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
+               git_print_page_nav('tree','', $hash_base, undef, undef,
+                                  join(' | ', @views_nav));
                git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
        } else {
                undef $hash_base;
@@ -4969,8 +5423,10 @@ sub git_tree {
                undef $up unless $up;
                # based on git_print_tree_entry
                print '<td class="mode">' . mode_str('040000') . "</td>\n";
+               print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
                print '<td class="list">';
-               print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
+               print $cgi->a({-href => href(action=>"tree",
+                                            hash_base=>$hash_base,
                                             file_name=>$up)},
                              "..");
                print "</td>\n";
@@ -4979,7 +5435,7 @@ sub git_tree {
                print "</tr>\n";
        }
        foreach my $line (@entries) {
-               my %t = parse_ls_tree_line($line, -z => 1);
+               my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
 
                if ($alternate) {
                        print "<tr class=\"dark\">\n";
@@ -4997,6 +5453,43 @@ sub git_tree {
        git_footer_html();
 }
 
+sub snapshot_name {
+       my ($project, $hash) = @_;
+
+       # path/to/project.git  -> project
+       # path/to/project/.git -> project
+       my $name = to_utf8($project);
+       $name =~ s,([^/])/*\.git$,$1,;
+       $name = basename($name);
+       # sanitize name
+       $name =~ s/[[:cntrl:]]/?/g;
+
+       my $ver = $hash;
+       if ($hash =~ /^[0-9a-fA-F]+$/) {
+               # shorten SHA-1 hash
+               my $full_hash = git_get_full_hash($project, $hash);
+               if ($full_hash =~ /^$hash/ && length($hash) > 7) {
+                       $ver = git_get_short_hash($project, $hash);
+               }
+       } elsif ($hash =~ m!^refs/tags/(.*)$!) {
+               # tags don't need shortened SHA-1 hash
+               $ver = $1;
+       } else {
+               # branches and other need shortened SHA-1 hash
+               if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
+                       $ver = $1;
+               }
+               $ver .= '-' . git_get_short_hash($project, $hash);
+       }
+       # in case of hierarchical branch names
+       $ver =~ s!/!.!g;
+
+       # name = project-version_string
+       $name = "$name-$ver";
+
+       return wantarray ? ($name, $name) : $name;
+}
+
 sub git_snapshot {
        my $format = $input_params{'snapshot_format'};
        if (!@snapshot_fmts) {
@@ -5008,32 +5501,33 @@ sub git_snapshot {
                die_error(400, "Invalid snapshot format parameter");
        } elsif (!exists($known_snapshot_formats{$format})) {
                die_error(400, "Unknown snapshot format");
+       } elsif ($known_snapshot_formats{$format}{'disabled'}) {
+               die_error(403, "Snapshot format not allowed");
        } elsif (!grep($_ eq $format, @snapshot_fmts)) {
                die_error(403, "Unsupported snapshot format");
        }
 
-       if (!defined $hash) {
-               $hash = git_get_head_hash($project);
+       my $type = git_get_type("$hash^{}");
+       if (!$type) {
+               die_error(404, 'Object does not exist');
+       }  elsif ($type eq 'blob') {
+               die_error(400, 'Object is not a tree-ish');
        }
 
-       my $name = $project;
-       $name =~ s,([^/])/*\.git$,$1,;
-       $name = basename($name);
-       my $filename = to_utf8($name);
-       $name =~ s/\047/\047\\\047\047/g;
-       my $cmd;
-       $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
-       $cmd = quote_command(
+       my ($name, $prefix) = snapshot_name($project, $hash);
+       my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
+       my $cmd = quote_command(
                git_cmd(), 'archive',
                "--format=$known_snapshot_formats{$format}{'format'}",
-               "--prefix=$name/", $hash);
+               "--prefix=$prefix/", $hash);
        if (exists $known_snapshot_formats{$format}{'compressor'}) {
                $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
        }
 
+       $filename =~ s/(["\\])/\\$1/g;
        print $cgi->header(
                -type => $known_snapshot_formats{$format}{'type'},
-               -content_disposition => 'inline; filename="' . "$filename" . '"',
+               -content_disposition => 'inline; filename="' . $filename . '"',
                -status => '200 OK');
 
        open my $fd, "-|", $cmd
@@ -5044,22 +5538,57 @@ sub git_snapshot {
        close $fd;
 }
 
-sub git_log {
+sub git_log_generic {
+       my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
+
        my $head = git_get_head_hash($project);
-       if (!defined $hash) {
-               $hash = $head;
+       if (!defined $base) {
+               $base = $head;
        }
        if (!defined $page) {
                $page = 0;
        }
        my $refs = git_get_references();
 
-       my @commitlist = parse_commits($hash, 101, (100 * $page));
+       my $commit_hash = $base;
+       if (defined $parent) {
+               $commit_hash = "$parent..$base";
+       }
+       my @commitlist =
+               parse_commits($commit_hash, 101, (100 * $page),
+                             defined $file_name ? ($file_name, "--full-history") : ());
 
-       my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
+       my $ftype;
+       if (!defined $file_hash && defined $file_name) {
+               # some commits could have deleted file in question,
+               # and not have it in tree, but one of them has to have it
+               for (my $i = 0; $i < @commitlist; $i++) {
+                       $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
+                       last if defined $file_hash;
+               }
+       }
+       if (defined $file_hash) {
+               $ftype = git_get_type($file_hash);
+       }
+       if (defined $file_name && !defined $ftype) {
+               die_error(500, "Unknown type of object");
+       }
+       my %co;
+       if (defined $file_name) {
+               %co = parse_commit($base)
+                       or die_error(404, "Unknown commit object");
+       }
 
-       my ($patch_max) = gitweb_get_feature('patches');
-       if ($patch_max) {
+
+       my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
+       my $next_link = '';
+       if ($#commitlist >= 100) {
+               $next_link =
+                       $cgi->a({-href => href(-replay=>1, page=>$page+1),
+                                -accesskey => "n", -title => "Alt-n"}, "next");
+       }
+       my $patch_max = gitweb_get_feature('patches');
+       if ($patch_max && !defined $file_name) {
                if ($patch_max < 0 || @commitlist <= $patch_max) {
                        $paging_nav .= " &sdot; " .
                                $cgi->a({-href => href(action=>"patches", -replay=>1)},
@@ -5068,56 +5597,30 @@ sub git_log {
        }
 
        git_header_html();
-       git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
-
-       if (!@commitlist) {
-               my %co = parse_commit($hash);
-
-               git_print_header_div('summary', $project);
-               print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
+       git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
+       if (defined $file_name) {
+               git_print_header_div('commit', esc_html($co{'title'}), $base);
+       } else {
+               git_print_header_div('summary', $project)
        }
-       my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
-       for (my $i = 0; $i <= $to; $i++) {
-               my %co = %{$commitlist[$i]};
-               next if !%co;
-               my $commit = $co{'id'};
-               my $ref = format_ref_marker($refs, $commit);
-               my %ad = parse_date($co{'author_epoch'});
-               git_print_header_div('commit',
-                              "<span class=\"age\">$co{'age_string'}</span>" .
-                              esc_html($co{'title'}) . $ref,
-                              $commit);
-               print "<div class=\"title_text\">\n" .
-                     "<div class=\"log_link\">\n" .
-                     $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
-                     " | " .
-                     $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
-                     " | " .
-                     $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
-                     "<br/>\n" .
-                     "</div>\n" .
-                     "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
-                     "</div>\n";
+       git_print_page_path($file_name, $ftype, $hash_base)
+               if (defined $file_name);
+
+       $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
+                    $file_name, $file_hash, $ftype);
 
-               print "<div class=\"log_body\">\n";
-               git_print_log($co{'comment'}, -final_empty_line=> 1);
-               print "</div>\n";
-       }
-       if ($#commitlist >= 100) {
-               print "<div class=\"page_nav\">\n";
-               print $cgi->a({-href => href(-replay=>1, page=>$page+1),
-                              -accesskey => "n", -title => "Alt-n"}, "next");
-               print "</div>\n";
-       }
        git_footer_html();
 }
 
+sub git_log {
+       git_log_generic('log', \&git_log_body,
+                       $hash, $hash_parent);
+}
+
 sub git_commit {
        $hash ||= $hash_base || "HEAD";
        my %co = parse_commit($hash)
            or die_error(404, "Unknown commit object");
-       my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
-       my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
 
        my $parent  = $co{'parent'};
        my $parents = $co{'parents'}; # listref
@@ -5146,7 +5649,7 @@ sub git_commit {
                        } @$parents ) .
                        ')';
        }
-       if (gitweb_check_feature('patches')) {
+       if (gitweb_check_feature('patches') && @$parents <= 1) {
                $formats_nav .= " | " .
                        $cgi->a({-href => href(action=>"patch", -replay=>1)},
                                "patch");
@@ -5184,22 +5687,7 @@ sub git_commit {
        }
        print "<div class=\"title_text\">\n" .
              "<table class=\"object_header\">\n";
-       print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
-             "<tr>" .
-             "<td></td><td> $ad{'rfc2822'}";
-       if ($ad{'hour_local'} < 6) {
-               printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
-                      $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
-       } else {
-               printf(" (%02d:%02d %s)",
-                      $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
-       }
-       print "</td>" .
-             "</tr>\n";
-       print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
-       print "<tr><td></td><td> $cd{'rfc2822'}" .
-             sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
-             "</td></tr>\n";
+       git_print_authorship_rows(\%co);
        print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
        print "<tr>" .
              "<td>tree</td>" .
@@ -5449,7 +5937,7 @@ sub git_commitdiff {
                $formats_nav =
                        $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
                                "raw");
-               if ($patch_max) {
+               if ($patch_max && @{$co{'parents'}} <= 1) {
                        $formats_nav .= " | " .
                                $cgi->a({-href => href(action=>"patch", -replay=>1)},
                                        "patch");
@@ -5580,7 +6068,11 @@ sub git_commitdiff {
                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, $hash);
-               git_print_authorship(\%co);
+               print "<div class=\"title_text\">\n" .
+                     "<table class=\"object_header\">\n";
+               git_print_authorship_rows(\%co);
+               print "</table>".
+                     "</div>\n";
                print "<div class=\"page_body\">\n";
                if (@{$co{'comment'}} > 1) {
                        print "<div class=\"log\">\n";
@@ -5653,7 +6145,7 @@ sub git_commitdiff_plain {
 
 # format-patch-style patches
 sub git_patch {
-       git_commitdiff(-format => 'patch', -single=> 1);
+       git_commitdiff(-format => 'patch', -single => 1);
 }
 
 sub git_patches {
@@ -5661,70 +6153,9 @@ sub git_patches {
 }
 
 sub git_history {
-       if (!defined $hash_base) {
-               $hash_base = git_get_head_hash($project);
-       }
-       if (!defined $page) {
-               $page = 0;
-       }
-       my $ftype;
-       my %co = parse_commit($hash_base)
-           or die_error(404, "Unknown commit object");
-
-       my $refs = git_get_references();
-       my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
-
-       my @commitlist = parse_commits($hash_base, 101, (100 * $page),
-                                      $file_name, "--full-history")
-           or die_error(404, "No such file or directory on given branch");
-
-       if (!defined $hash && defined $file_name) {
-               # some commits could have deleted file in question,
-               # and not have it in tree, but one of them has to have it
-               for (my $i = 0; $i <= @commitlist; $i++) {
-                       $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
-                       last if defined $hash;
-               }
-       }
-       if (defined $hash) {
-               $ftype = git_get_type($hash);
-       }
-       if (!defined $ftype) {
-               die_error(500, "Unknown type of object");
-       }
-
-       my $paging_nav = '';
-       if ($page > 0) {
-               $paging_nav .=
-                       $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
-                                              file_name=>$file_name)},
-                               "first");
-               $paging_nav .= " &sdot; " .
-                       $cgi->a({-href => href(-replay=>1, page=>$page-1),
-                                -accesskey => "p", -title => "Alt-p"}, "prev");
-       } else {
-               $paging_nav .= "first";
-               $paging_nav .= " &sdot; prev";
-       }
-       my $next_link = '';
-       if ($#commitlist >= 100) {
-               $next_link =
-                       $cgi->a({-href => href(-replay=>1, page=>$page+1),
-                                -accesskey => "n", -title => "Alt-n"}, "next");
-               $paging_nav .= " &sdot; $next_link";
-       } else {
-               $paging_nav .= " &sdot; next";
-       }
-
-       git_header_html();
-       git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
-       git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
-       git_print_page_path($file_name, $ftype, $hash_base);
-
-       git_history_body(\@commitlist, 0, 99,
-                        $refs, $hash_base, $ftype, $next_link);
-
-       git_footer_html();
+       git_log_generic('history', \&git_history_body,
+                       $hash_base, $hash_parent_base,
+                       $file_name, $hash);
 }
 
 sub git_search {
@@ -5809,7 +6240,7 @@ sub git_search {
 
                print "<table class=\"pickaxe search\">\n";
                my $alternate = 1;
-               $/ = "\n";
+               local $/ = "\n";
                open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
                        '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
                        ($search_use_regexp ? '--pickaxe-regex' : ());
@@ -5879,7 +6310,7 @@ sub git_search {
                print "<table class=\"grep_search\">\n";
                my $alternate = 1;
                my $matches = 0;
-               $/ = "\n";
+               local $/ = "\n";
                open my $fd, "-|", git_cmd(), 'grep', '-n',
                        $search_use_regexp ? ('-E', '-i') : '-F',
                        $searchtext, $co{'tree'};
@@ -5988,44 +6419,8 @@ sub git_search_help {
 }
 
 sub git_shortlog {
-       my $head = git_get_head_hash($project);
-       if (!defined $hash) {
-               $hash = $head;
-       }
-       if (!defined $page) {
-               $page = 0;
-       }
-       my $refs = git_get_references();
-
-       my $commit_hash = $hash;
-       if (defined $hash_parent) {
-               $commit_hash = "$hash_parent..$hash";
-       }
-       my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
-
-       my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
-       my $next_link = '';
-       if ($#commitlist >= 100) {
-               $next_link =
-                       $cgi->a({-href => href(-replay=>1, page=>$page+1),
-                                -accesskey => "n", -title => "Alt-n"}, "next");
-       }
-       my $patch_max = gitweb_check_feature('patches');
-       if ($patch_max) {
-               if ($patch_max < 0 || @commitlist <= $patch_max) {
-                       $paging_nav .= " &sdot; " .
-                               $cgi->a({-href => href(action=>"patches", -replay=>1)},
-                                       "patches");
-               }
-       }
-
-       git_header_html();
-       git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
-       git_print_header_div('summary', $project);
-
-       git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
-
-       git_footer_html();
+       git_log_generic('shortlog', \&git_shortlog_body,
+                       $hash, $hash_parent);
 }
 
 ## ......................................................................
@@ -6282,7 +6677,7 @@ sub git_feed {
        # end of feed
        if ($format eq 'rss') {
                print "</channel>\n</rss>\n";
-       }       elsif ($format eq 'atom') {
+       } elsif ($format eq 'atom') {
                print "</feed>\n";
        }
 }