class KPM::Utils

def peek_tgz_file_names(tar_gz_archive)
  file_names = []
  Gem::Package::TarReader.new(Zlib::GzipReader.open(tar_gz_archive)) do |tar|
    tar.each do |entry|
      file_names.push entry.full_name if entry.file?
    end
  end
  file_names
end