gistfile.txt

def check_redis_version
  conn = Hiredis::Connection.new
  conn.connect('localhost', 6379)
  conn.write ['info']

  result = conn.read.split(/\r\n/).select {|l|
    not (l =~ /^#/ or l == '')
  }

  k,v = result[0].split(/:/)

  if k != 'redis_version'
    raise 'cannot determine redis version' 
  end

  major, minor, revision = v.split(/\./)

  if major != '2' || minor != '6'
    raise 'Redis server must be at least 2.6'
  end
end

check_redis_version