developwithpassion/expansions

module Expansions
  module CLIInterface
    extend self

    def get_expansion_file_name(args)
      return args.count > 0 ? args[0] : "ExpansionFile"
    end

    def ensure_expansion_file_provided(file)
      unless File.exist?(file)
        print <<-prompt
dwp_expand aborted!
No Expansionfile found (looking for: ExpansionFile)
        prompt
        exit
      end
    end

    def run(*args)
      file_to_run = get_expansion_file_name(args)
      ensure_expansion_file_provided file_to_run
      Startup.run
      load file_to_run
      Expansion.instance.run
    end
  end
end