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annotate planemo/lib/python3.7/site-packages/virtualenv/info.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1 from __future__ import absolute_import, unicode_literals
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2
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3 import logging
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4 import os
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5 import platform
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6 import sys
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7 import tempfile
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8
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9 IMPLEMENTATION = platform.python_implementation()
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10 IS_PYPY = IMPLEMENTATION == "PyPy"
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11 IS_CPYTHON = IMPLEMENTATION == "CPython"
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12 PY3 = sys.version_info[0] == 3
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13 PY2 = sys.version_info[0] == 2
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14 IS_WIN = sys.platform == "win32"
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15 ROOT = os.path.realpath(os.path.join(os.path.abspath(__file__), os.path.pardir, os.path.pardir))
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16 IS_ZIPAPP = os.path.isfile(ROOT)
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17 WIN_CPYTHON_2 = IS_CPYTHON and IS_WIN and PY2
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18
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19 _CAN_SYMLINK = _FS_CASE_SENSITIVE = _CFG_DIR = _DATA_DIR = None
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21
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22 def fs_is_case_sensitive():
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23 global _FS_CASE_SENSITIVE
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24
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25 if _FS_CASE_SENSITIVE is None:
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26 with tempfile.NamedTemporaryFile(prefix="TmP") as tmp_file:
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27 _FS_CASE_SENSITIVE = not os.path.exists(tmp_file.name.lower())
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28 logging.debug("filesystem is %scase-sensitive", "" if _FS_CASE_SENSITIVE else "not ")
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29 return _FS_CASE_SENSITIVE
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31
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32 def fs_supports_symlink():
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33 global _CAN_SYMLINK
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34
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35 if _CAN_SYMLINK is None:
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36 can = False
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37 if hasattr(os, "symlink"):
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38 if IS_WIN:
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39 with tempfile.NamedTemporaryFile(prefix="TmP") as tmp_file:
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40 temp_dir = os.path.dirname(tmp_file.name)
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41 dest = os.path.join(temp_dir, "{}-{}".format(tmp_file.name, "b"))
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42 try:
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43 os.symlink(tmp_file.name, dest)
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44 can = True
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45 except (OSError, NotImplementedError):
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46 pass
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47 logging.debug("symlink on filesystem does%s work", "" if can else " not")
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48 else:
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49 can = True
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50 _CAN_SYMLINK = can
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51 return _CAN_SYMLINK
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52
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53
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54 __all__ = (
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55 "IS_PYPY",
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56 "IS_CPYTHON",
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57 "PY3",
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58 "PY2",
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59 "IS_WIN",
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60 "fs_is_case_sensitive",
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61 "fs_supports_symlink",
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62 "ROOT",
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63 "IS_ZIPAPP",
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64 "WIN_CPYTHON_2",
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65 )