36 lines
1 KiB
Python
36 lines
1 KiB
Python
"""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)
|