class Yardstick::CLI

def self.display_exit(message)
  puts message.to_str
  exit
end

def self.option_parser(_options)
  opts = OptionParser.new
  opts.on_tail('-v', '--version', 'print version information and exit') { display_exit("#{opts.program_name} #{Yardstick::VERSION}") }
  opts.on_tail('-h', '--help',    'display this help and exit')         { display_exit(opts.to_s) }
  opts
end

def self.parse_config(args)
  args << '--help' if args.empty?
  options = {}
  option_parser(options).parse!(args)
  Config.new(options.merge(:path => args))
rescue OptionParser::InvalidOption => error
  display_exit(error.message)
end

def self.run(*args)
  measurements = Yardstick.measure(parse_config(args))
  measurements.puts
  measurements
end