Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/pip/_internal/utils/compat.py: 50%

1"""Stuff that differs in different Python versions and platform 

2distributions.""" 

3 

4import logging 

5import os 

6import sys 

7 

8__all__ = ["get_path_uid", "stdlib_pkgs", "WINDOWS"] 

9 

10 

11logger = logging.getLogger(__name__) 

12 

13 

14def has_tls() -> bool: 

15 try: 

16 import _ssl # noqa: F401 # ignore unused 

17 

18 return True 

19 except ImportError: 

20 pass 

21 

22 from pip._vendor.urllib3.util import IS_PYOPENSSL 

23 

24 return IS_PYOPENSSL 

25 

26 

27def get_path_uid(path: str) -> int: 

28 """ 

29 Return path's uid. 

30 

31 Does not follow symlinks: 

32 https://github.com/pypa/pip/pull/935#discussion_r5307003 

33 

34 Placed this function in compat due to differences on AIX and 

35 Jython, that should eventually go away. 

36 

37 :raises OSError: When path is a symlink or can't be read. 

38 """ 

39 if hasattr(os, "O_NOFOLLOW"): 

40 fd = os.open(path, os.O_RDONLY | os.O_NOFOLLOW) 

41 file_uid = os.fstat(fd).st_uid 

42 os.close(fd) 

43 else: # AIX and Jython 

44 # WARNING: time of check vulnerability, but best we can do w/o NOFOLLOW 

45 if not os.path.islink(path): 

46 # older versions of Jython don't have `os.fstat` 

47 file_uid = os.stat(path).st_uid 

48 else: 

49 # raise OSError for parity with os.O_NOFOLLOW above 

50 raise OSError(f"{path} is a symlink; Will not return uid for symlinks") 

51 return file_uid 

52 

53 

54# packages in the stdlib that may have installation metadata, but should not be 

55# considered 'installed'. this theoretically could be determined based on 

56# dist.location (py27:`sysconfig.get_paths()['stdlib']`, 

57# py26:sysconfig.get_config_vars('LIBDEST')), but fear platform variation may 

58# make this ineffective, so hard-coding 

59stdlib_pkgs = {"python", "wsgiref", "argparse"} 

60 

61 

62# windows detection, covers cpython and ironpython 

63WINDOWS = sys.platform.startswith("win") or (sys.platform == "cli" and os.name == "nt")