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- """Execute exactly this copy of pip, within a different environment.
- This file is named as it is, to ensure that this module can't be imported via
- an import statement.
- """
- import runpy
- import sys
- import types
- from importlib.machinery import ModuleSpec, PathFinder
- from os.path import dirname
- from typing import Optional, Sequence, Union
- PIP_SOURCES_ROOT = dirname(dirname(__file__))
- class PipImportRedirectingFinder:
- @classmethod
- def find_spec(
- self,
- fullname: str,
- path: Optional[Sequence[Union[bytes, str]]] = None,
- target: Optional[types.ModuleType] = None,
- ) -> Optional[ModuleSpec]:
- if fullname != "pip":
- return None
- spec = PathFinder.find_spec(fullname, [PIP_SOURCES_ROOT], target)
- assert spec, (PIP_SOURCES_ROOT, fullname)
- return spec
- sys.meta_path.insert(0, PipImportRedirectingFinder())
- assert __name__ == "__main__", "Cannot run __pip-runner__.py as a non-main module"
- runpy.run_module("pip", run_name="__main__", alter_sys=True)
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