def get_value(key)
      value = execute_command("config #{@location} --null --get #{key}")
      raise 'failure running command' if $?.exitstatus != 0
      value.slice!(0, value.length-1)
    end
def get_value(key)
      value = execute_command("config #{@location} --null --get #{key}")
      raise 'failure running command' if $?.exitstatus != 0
      value.slice!(0, value.length-1)
    end
-------------------------------------------------------------------------
 @param [Object] repo
 @param [Object] location
 @return [Object]
 -------------------------------------------------------------------------
 @param [Object] key