scala case class Config(name: String = "", version: Int = 0) scala val parser = new scopt.OptionParser[Config]("myProgram") { head("myProgram", "1.0") opt[String]('n', "name").required().action((x, c) => c.copy(name = x)).text("name is a required string property") opt[Int]('v', "version").required().action((x, c) => c.copy(version = x)).text("version is a required integer property") } scala parser.parse(args, Config()) match { case Some(config) => println(s"Name: ${config.name}") println(s"Version: ${config.version}") case None => println("Failed to parse command line arguments.") }