class Rails::Secrets

def writing(contents)
  tmp_file = "#{File.basename(path)}.#{Process.pid}"
  tmp_path = File.join(Dir.tmpdir, tmp_file)
  IO.binwrite(tmp_path, contents)
  yield tmp_path
  updated_contents = IO.binread(tmp_path)
  write(updated_contents) if updated_contents != contents
ensure
  FileUtils.rm(tmp_path) if File.exist?(tmp_path)
end