58 lines
2.2 KiB
Python
58 lines
2.2 KiB
Python
from __future__ import print_function
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"""Utilities to find the site and prefix information of a Python executable, which may be Python 2.
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This file MUST remain compatible with Python 2. Since we cannot make any assumptions about the
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Python being executed, this module should not use *any* dependencies outside of the standard
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library found in Python 2. This file is run each mypy run, so it should be kept as fast as
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possible.
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"""
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import os
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import sys
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import sysconfig
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MYPY = False
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if MYPY:
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from typing import List
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if __name__ == '__main__':
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# HACK: We don't want to pick up mypy.types as the top-level types
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# module. This could happen if this file is run as a script.
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# This workaround fixes it.
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old_sys_path = sys.path
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sys.path = sys.path[1:]
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import types # noqa
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sys.path = old_sys_path
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def getsearchdirs():
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# type: () -> List[str]
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# Do not include things from the standard library
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# because those should come from typeshed.
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stdlib_zip = os.path.join(
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sys.base_exec_prefix,
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getattr(sys, "platlibdir", "lib"),
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"python{}{}.zip".format(sys.version_info.major, sys.version_info.minor)
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)
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stdlib = sysconfig.get_path("stdlib")
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stdlib_ext = os.path.join(stdlib, "lib-dynload")
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excludes = set([stdlib_zip, stdlib, stdlib_ext])
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# Drop the first entry of sys.path
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# - If pyinfo.py is executed as a script (in a subprocess), this is the directory
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# containing pyinfo.py
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# - Otherwise, if mypy launched via console script, this is the directory of the script
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# - Otherwise, if mypy launched via python -m mypy, this is the current directory
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# In all cases, this is safe to drop
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# Note that mypy adds the cwd to SearchPaths.python_path, so we still find things on the
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# cwd consistently (the return value here sets SearchPaths.package_path)
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abs_sys_path = (os.path.abspath(p) for p in sys.path[1:])
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return [p for p in abs_sys_path if p not in excludes]
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if __name__ == '__main__':
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if sys.argv[-1] == 'getsearchdirs':
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print(repr(getsearchdirs()))
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else:
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print("ERROR: incorrect argument to pyinfo.py.", file=sys.stderr)
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sys.exit(1)
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