Ask required command-line input in Rails-Generator/Thor

Question

I am building a generator in Ruby-on-Rails and was wondering if it's possible to ask for a required argument with Thor . Or if there's a decent workaround. Right now I'm just raising an exception:

@foo = ask('[Required] Enter Foo:')
raise 'Required argument missing' unless (@foo).present?

Answer 1

A workaround could be:

loop do
  @foo = ask('[Required] Enter Foo:')
  break if @foo.present?
end