51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
"""Execute exactly this copy of pip, within a different environment.
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This file is named as it is, to ensure that this module can't be imported via
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an import statement.
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"""
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# /!\ This version compatibility check section must be Python 2 compatible. /!\
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import sys
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# Copied from pyproject.toml
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PYTHON_REQUIRES = (3, 8)
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def version_str(version): # type: ignore
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return ".".join(str(v) for v in version)
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if sys.version_info[:2] < PYTHON_REQUIRES:
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raise SystemExit(
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"This version of pip does not support python {} (requires >={}).".format(
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version_str(sys.version_info[:2]), version_str(PYTHON_REQUIRES)
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)
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)
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# From here on, we can use Python 3 features, but the syntax must remain
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# Python 2 compatible.
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import runpy # noqa: E402
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from importlib.machinery import PathFinder # noqa: E402
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from os.path import dirname # noqa: E402
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PIP_SOURCES_ROOT = dirname(dirname(__file__))
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class PipImportRedirectingFinder:
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@classmethod
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def find_spec(self, fullname, path=None, target=None): # type: ignore
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if fullname != "pip":
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return None
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spec = PathFinder.find_spec(fullname, [PIP_SOURCES_ROOT], target)
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assert spec, (PIP_SOURCES_ROOT, fullname)
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return spec
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sys.meta_path.insert(0, PipImportRedirectingFinder())
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assert __name__ == "__main__", "Cannot run __pip-runner__.py as a non-main module"
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runpy.run_module("pip", run_name="__main__", alter_sys=True)
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