docs: def set_default(name=None, index=None):
      """
      set the default configuration by name
  
      """
      default_was_set = False
      count = 1
  
      for configuration in _CONFIG.sections():
          if index != None:
              if count == index:
                  _CONFIG.set(configuration, 'default', True)
                  default_was_set = True
              else:
                  _CONFIG.remove_option(configuration, 'default')
  
          if name != None:
              if configuration == name:
                  _CONFIG.set(configuration, 'default', True)
                  default_was_set = True
              else:
                  _CONFIG.remove_option(configuration, 'default')
  
          count += 1
  
      if not default_was_set:
          raise JutException('Unable to find %s configuration' % name)
  
      with open(_CONFIG_FILEPATH, 'w') as configfile:
          _CONFIG.write(configfile)
  
      info('Configuration updated at %s' % _JUT_HOME)