595799cb641c6514eccd4b6908cfaf4426c5a389,src/python/pants/engine/exp/configuration.py,Configuration,create,#Configuration#,161

Before Change

      return configuration_type(**attributes)
    elif self.merges:
      attributes = self._extract_inheritable_attributes(self.merges)
      for k, v in self._asdict().items():
        if k not in self._SPECIAL_FIELDS:
          if isinstance(v, MutableMapping):
            mapping = attributes.get(k) or {}
            mapping.update(v)
            attributes[k] = mapping
          elif isinstance(v, MutableSequence):
            sequence = attributes.get(k) or []
            sequence.extend(v)
            attributes[k] = sequence
          elif v is not None:
            attributes[k] = v
      configuration_type = type(self)
      return configuration_type(**attributes)
    else:
      return self

After Change

    if self.extends:
      for k, v in self._extract_inheritable_attributes(self.extends).items():
        attributes.setdefault(k, v)

    if self.merges:
      def merge(attrs):
        for k, v in attrs.items():

Instances