return r
						default:
							return '_'
						}
					}, file)
				}
				err := data.files(func(name string, data []byte) {
					fn := fmt.Sprintf("%s-%s.data", file, name)
					if c.Bool("combine") {
						if name == "null" {
							name = v0
						}

						f := filemap[file][name]
						if f != "" {
							fn = f + ".data"
							err = os.MkdirAll(filepath.Dir(fn), os.ModePerm)