scalaから外部プロセスを起動して結果をリストとして受け取る

exec.scala

def exec(command:String) = {
	import java.lang._
	import java.io._

	def getResult(command:String):Option[BufferedReader] = {
		try {
			val is = Runtime.getRuntime().exec(command).getInputStream()
			Some(new BufferedReader(new InputStreamReader(is)))
		} catch {
			case _ => None
		}
	}

	def read(br:BufferedReader):List[String] = br.readLine match {
		case null => {
		  br.close()
		  Nil
		}
		case s => s :: read(br)
	}

	getResult(command) match {
		case Some(br) => read(br)
		case _ => Nil
	}
}