51 lines
1.4 KiB
Python
51 lines
1.4 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.
|
|
"""
|
|
|
|
# /!\ 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:
|
|
@classmethod
|
|
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)
|