Macbook
44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
"""Virtualenv-specific Discover base class for plugin-based Python discovery."""
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from __future__ import annotations
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import os
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from abc import ABC, abstractmethod
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from argparse import ArgumentParser
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from collections.abc import Mapping
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from python_discovery import PythonInfo
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from virtualenv.config.cli.parser import VirtualEnvOptions
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class Discover(ABC):
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@classmethod
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def add_parser_arguments(cls, parser: ArgumentParser) -> None:
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raise NotImplementedError
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def __init__(self, options: VirtualEnvOptions) -> None:
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self._has_run = False
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self._interpreter: PythonInfo | None = None
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self._env: Mapping[str, str] = options.env if options.env is not None else os.environ
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@abstractmethod
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def run(self) -> PythonInfo | None:
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raise NotImplementedError
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@property
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def interpreter(self) -> PythonInfo | None:
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"""The interpreter as returned by :meth:`run`, cached."""
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if self._has_run is False:
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self._interpreter = self.run()
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self._has_run = True
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return self._interpreter
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__all__ = [
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"Discover",
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]
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