def exit_status
      effective_sources.each do |source|
        next if @ignore.include?(source)

        process_source(source)
        break if @fail_fast && !@success
      end

      @success ? EXIT_SUCCESS : EXIT_FAILURE
    end
def exit_status
      effective_sources.each do |source|
        next if @ignore.include?(source)

        process_source(source)
        break if @fail_fast && !@success
      end

      @success ? EXIT_SUCCESS : EXIT_FAILURE
    end
Return exit status

 @return [Fixnum]

 @api private