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- """Stuff that differs in different Python versions and platform
- distributions."""
- import logging
- import os
- import sys
- __all__ = ["get_path_uid", "stdlib_pkgs", "WINDOWS"]
- logger = logging.getLogger(__name__)
- def has_tls():
- # type: () -> bool
- try:
- import _ssl # noqa: F401 # ignore unused
- return True
- except ImportError:
- pass
- from pip._vendor.urllib3.util import IS_PYOPENSSL
- return IS_PYOPENSSL
- def get_path_uid(path):
- # type: (str) -> int
- """
- Return path's uid.
- Does not follow symlinks:
- https://github.com/pypa/pip/pull/935#discussion_r5307003
- Placed this function in compat due to differences on AIX and
- Jython, that should eventually go away.
- :raises OSError: When path is a symlink or can't be read.
- """
- if hasattr(os, "O_NOFOLLOW"):
- fd = os.open(path, os.O_RDONLY | os.O_NOFOLLOW)
- file_uid = os.fstat(fd).st_uid
- os.close(fd)
- else: # AIX and Jython
- # WARNING: time of check vulnerability, but best we can do w/o NOFOLLOW
- if not os.path.islink(path):
- # older versions of Jython don't have `os.fstat`
- file_uid = os.stat(path).st_uid
- else:
- # raise OSError for parity with os.O_NOFOLLOW above
- raise OSError(f"{path} is a symlink; Will not return uid for symlinks")
- return file_uid
- # packages in the stdlib that may have installation metadata, but should not be
- # considered 'installed'. this theoretically could be determined based on
- # dist.location (py27:`sysconfig.get_paths()['stdlib']`,
- # py26:sysconfig.get_config_vars('LIBDEST')), but fear platform variation may
- # make this ineffective, so hard-coding
- stdlib_pkgs = {"python", "wsgiref", "argparse"}
- # windows detection, covers cpython and ironpython
- WINDOWS = sys.platform.startswith("win") or (sys.platform == "cli" and os.name == "nt")
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