Курсовой проект Web-Сайт / venv / Lib / site-packages / pip / _internal / utils / compat

"""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() -> 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: 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")