| import abc |
| |
| from pip._vendor.six import add_metaclass |
| |
| |
| @add_metaclass(abc.ABCMeta) |
| class AbstractDistribution(object): |
| """A base class for handling installable artifacts. |
| |
| The requirements for anything installable are as follows: |
| |
| - we must be able to determine the requirement name |
| (or we can't correctly handle the non-upgrade case). |
| |
| - for packages with setup requirements, we must also be able |
| to determine their requirements without installing additional |
| packages (for the same reason as run-time dependencies) |
| |
| - we must be able to create a Distribution object exposing the |
| above metadata. |
| """ |
| |
| def __init__(self, req): |
| super(AbstractDistribution, self).__init__() |
| self.req = req |
| |
| @abc.abstractmethod |
| def get_pkg_resources_distribution(self): |
| raise NotImplementedError() |
| |
| @abc.abstractmethod |
| def prepare_distribution_metadata(self, finder, build_isolation): |
| raise NotImplementedError() |
