X-Git-Url: https://git.ladys.computer/Gitweb/blobdiff_plain/d20ce5dea8fd6d3fae28718c52f666f37a607187125b0a94d10d533310949fed..9c9d435689da11f7e28170a9499e203e9cce56bb61c0846b9adb4e62091435f4:/gitweb.perl

diff --git a/gitweb.perl b/gitweb.perl
index dbb25a9..b063714 100755
--- a/gitweb.perl
+++ b/gitweb.perl
@@ -749,6 +749,73 @@ sub git_get_references {
 	return \%refs;
 }
 
+sub git_get_following_references {
+	my $hash = shift || return undef;
+	my $type = shift;
+	my $base = shift || $hash_base || "HEAD";
+
+	my $refs = git_get_references($type);
+	open my $fd, "-|", $GIT, "rev-list", $base
+		or return undef;
+	my @commits = map { chomp; $_ } <$fd>;
+	close $fd
+		or return undef;
+
+	my @reflist;
+	my $lastref;
+
+	foreach my $commit (@commits) {
+		foreach my $ref (@{$refs->{$commit}}) {
+			$lastref = $ref;
+			push @reflist, $lastref;
+		}
+		if ($commit eq $hash) {
+			last;
+		}
+	}
+
+	return wantarray ? @reflist : $lastref;
+}
+
+sub git_get_preceding_references {
+	my $hash = shift || return undef;
+	my $type = shift;
+
+	my $refs = git_get_references($type);
+	open my $fd, "-|", $GIT, "rev-list", $hash
+		or return undef;
+	my @commits = map { chomp; $_ } <$fd>;
+	close $fd
+		or return undef;
+
+	my @reflist;
+
+	foreach my $commit (@commits) {
+		foreach my $ref (@{$refs->{$commit}}) {
+			return $ref unless wantarray;
+			push @reflist, $ref;
+		}
+	}
+
+	return @reflist;
+}
+
+sub git_get_rev_name_tags {
+	my $hash = shift || return undef;
+
+	open my $fd, "-|", $GIT, "name-rev", "--tags", $hash
+		or return;
+	my $name_rev = <$fd>;
+	close $fd;
+
+	if ($name_rev =~ m|^$hash tags/(.*)$|) {
+		return $1;
+	} else {
+		# catches also '$hash undefined' output
+		return undef;
+	}
+}
+
 ## ----------------------------------------------------------------------
 ## parse to hash functions
 
@@ -2773,10 +2840,7 @@ sub git_commitdiff {
 
 	} elsif ($format eq 'plain') {
 		my $refs = git_get_references("tags");
-		my @tagnames;
-		if (exists $refs->{$hash}) {
-			@tagnames = map { s|^tags/|| } $refs->{$hash};
-		}
+		my $tagname = git_get_rev_name_tags($hash);
 		my $filename = basename($project) . "-$hash.patch";
 
 		print $cgi->header(
@@ -2790,10 +2854,9 @@ From: $co{'author'}
 Date: $ad{'rfc2822'} ($ad{'tz_local'})
 Subject: $co{'title'}
 TEXT
-		foreach my $tag (@tagnames) {
-			print "X-Git-Tag: $tag\n";
-		}
+		print "X-Git-Tag: $tagname\n" if $tagname;
 		print "X-Git-Url: " . $cgi->self_url() . "\n\n";
+
 		foreach my $line (@{$co{'comment'}}) {
 			print "$line\n";
 		}