Mercurial > repos > shellac > guppy_basecaller

comparison env/lib/python3.7/site-packages/virtualenv/info.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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-1:000000000000 0:26e78fe6e8c4
1 from __future__ import absolute_import, unicode_literals
2
3 import logging
4 import os
5 import platform
6 import sys
7 import tempfile
8
9 IMPLEMENTATION = platform.python_implementation()
10 IS_PYPY = IMPLEMENTATION == "PyPy"
11 IS_CPYTHON = IMPLEMENTATION == "CPython"
12 PY3 = sys.version_info[0] == 3
13 PY2 = sys.version_info[0] == 2
14 IS_WIN = sys.platform == "win32"
15 ROOT = os.path.realpath(os.path.join(os.path.abspath(__file__), os.path.pardir, os.path.pardir))
16 IS_ZIPAPP = os.path.isfile(ROOT)
17 WIN_CPYTHON_2 = IS_CPYTHON and IS_WIN and PY2
18
19 _CAN_SYMLINK = _FS_CASE_SENSITIVE = _CFG_DIR = _DATA_DIR = None
20
21
22 def fs_is_case_sensitive():
23 global _FS_CASE_SENSITIVE
24
25 if _FS_CASE_SENSITIVE is None:
26 with tempfile.NamedTemporaryFile(prefix="TmP") as tmp_file:
27 _FS_CASE_SENSITIVE = not os.path.exists(tmp_file.name.lower())
28 logging.debug("filesystem is %scase-sensitive", "" if _FS_CASE_SENSITIVE else "not ")
29 return _FS_CASE_SENSITIVE
30
31
32 def fs_supports_symlink():
33 global _CAN_SYMLINK
34
35 if _CAN_SYMLINK is None:
36 can = False
37 if hasattr(os, "symlink"):
38 if IS_WIN:
39 with tempfile.NamedTemporaryFile(prefix="TmP") as tmp_file:
40 temp_dir = os.path.dirname(tmp_file.name)
41 dest = os.path.join(temp_dir, "{}-{}".format(tmp_file.name, "b"))
42 try:
43 os.symlink(tmp_file.name, dest)
44 can = True
45 except (OSError, NotImplementedError):
46 pass
47 logging.debug("symlink on filesystem does%s work", "" if can else " not")
48 else:
49 can = True
50 _CAN_SYMLINK = can
51 return _CAN_SYMLINK
52
53
54 __all__ = (
55 "IS_PYPY",
56 "IS_CPYTHON",
57 "PY3",
58 "PY2",
59 "IS_WIN",
60 "fs_is_case_sensitive",
61 "fs_supports_symlink",
62 "ROOT",
63 "IS_ZIPAPP",
64 "WIN_CPYTHON_2",
65 )