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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. | |
""" | |
# /!\ This version compatibility check section must be Python 2 compatible. /!\ | |
import sys | |
# Copied from setup.py | |
PYTHON_REQUIRES = (3, 7) | |
def version_str(version): # type: ignore | |
return ".".join(str(v) for v in version) | |
if sys.version_info[:2] < PYTHON_REQUIRES: | |
raise SystemExit( | |
"This version of pip does not support python {} (requires >={}).".format( | |
version_str(sys.version_info[:2]), version_str(PYTHON_REQUIRES) | |
) | |
) | |
# From here on, we can use Python 3 features, but the syntax must remain | |
# Python 2 compatible. | |
import runpy # noqa: E402 | |
from importlib.machinery import PathFinder # noqa: E402 | |
from os.path import dirname # noqa: E402 | |
PIP_SOURCES_ROOT = dirname(dirname(__file__)) | |
class PipImportRedirectingFinder: | |
def find_spec(self, fullname, path=None, target=None): # type: ignore | |
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) | |