Parsing Ruby options into Data

options.rb

require 'optparse'

module Kernel
  def OptionParser(&)
    fields = OptionParser.new(&).top.list.filter_map do |option|
      if option.is_a?(OptionParser::Switch)
        name = option.long&.first || option.short&.first
        name.delete_prefix('-').delete_prefix('-').to_sym
      end
    end

    Data.define(*fields) do
      define_singleton_method(:parse) do |argv = ARGV|
        into = fields.to_h { |field| [field, nil] }
        OptionParser.new(&).parse!(argv, into:)

        new(**into)
      end
    end
  end
end

Options = OptionParser do |parser|
  parser.on('-o', '--output FILE')
  parser.on('-p', '--port PORT', Integer)
  parser.on('-v', '--verbose')
end

# options = Options.parse(ARGV)
options = Options.parse(%w[-o blah.o -p 3000])
p options