define_method with predefined keyword arguments

I want to define a method that takes keyword arguments. I would like it to raise when keyword arguments are not provided, and I can code this myself - but ideally I would like to let Ruby do that for me. Also I would like to be able to inspect the freshly defined method using Method#parameters. If I use a shorthand double-splat (like **kwargs) the actual structure I expect is not visible to parameters.

I can of course do this:

define_method(:foo) do | foo:, bar: |
  # ...
end

which achieves the desired result:

method(:foo).parameters
# => [[:keyreq, :foo], [:keyreq, :bar]]

but I cannot pass those arguments programmatically, they have to be literally placed in the code. Is there a way I could bypass this?

via Chebli Mohamed