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providers.py
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61 lines (47 loc) · 1.61 KB
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from abc import ABCMeta, abstractmethod
from collections import UserDict
from importlib.metadata import entry_points
from typing import Any
from codemodder.logging import logger
class BaseProvider(metaclass=ABCMeta):
name: str
_resource: Any | None
def __init__(self, name):
self.name = name
self._resource = self.load()
@abstractmethod
def load(self) -> Any | None:
pass
@property
def is_available(self) -> bool:
return self.resource is not None
@property
def resource(self) -> Any:
if self._resource is None:
logger.debug("Resource for provider %s is not available", self.name)
return self._resource
class ProviderRegistry(UserDict):
def add_provider(self, name: str, provider: BaseProvider):
self[name] = provider
def get_provider(self, name: str) -> BaseProvider | None:
return self.get(name)
def load_providers() -> ProviderRegistry:
registry = ProviderRegistry()
logger.debug("loading registered providers")
for entry_point in entry_points().select(group="codemod_providers"):
logger.debug(
'- loading provider "%s" from "%s"',
entry_point.name,
entry_point.module,
)
try:
provider = entry_point.load()
except Exception:
logger.exception(
'Failed to load provider "%s" from "%s": %s',
entry_point.name,
entry_point.module,
)
continue
registry.add_provider(entry_point.name, provider(entry_point.name))
return registry