class Gem::Package::TarWriter

def add_symlink(name, target, mode)
  check_closed
  name, prefix = split_name name
  header = Gem::Package::TarHeader.new(name: name, mode: mode,
                                       size: 0, typeflag: "2",
                                       linkname: target,
                                       prefix: prefix,
                                       mtime: Gem.source_date_epoch).to_s
  @io.write header
  self
end