Rakefile

require 'erb'

desc 'Scaffold out a module'
task :module, %i[name] do |_task, args|
  template = ERB.new <<~END, trim_mode: '-'
    module <%= args[:name] %>
    <%- args.extras.each do |extra| %>
      def <%= extra %>
        :ok
      end
    <%- end %>
    end
  END

  puts template.result binding
end

# rake "module[Cxl, wombat, foo]"