ruby – 如何生成OptionParser需要参数

下面的代码可以工作,但是当我想要为必需的参数构建必需参数到本机的OptionParser sytax时,我手动提取使用fetch所需参数的参数错误：

# ocra script.rb -- --type=value
options = {}
OptionParser.new do |opts|
  opts.banner = "Usage: example.rb [options]"

  opts.on("--type [TYPE]",String,[:gl,:time],"Select Exception file type (gl,time)") do |t|
    options["type"] = t
  end

  opts.on("--company [TYPE]",[:jaxon,:doric],"Select Company (jaxon,doric)") do |t|
    options["company"] = t
  end

end.parse!

opts = {}
opts['type'] = options.fetch('type') do
  raise ArgumentError,"no 'type' option specified  as a parameter (gl or time)"
end

opts['company'] = options.fetch('company') do
  raise ArgumentError,"no 'company' option specified  as a parameter (doric or jaxon)"
end