Viewing file:  info.py (1.95 KB) -rw-r--r--
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from __future__ import absolute_import, unicode_literals
import logging
import os
import platform
import sys
import tempfile
IMPLEMENTATION = platform.python_implementation()
IS_PYPY = IMPLEMENTATION == "PyPy"
IS_CPYTHON = IMPLEMENTATION == "CPython"
PY3 = sys.version_info[0] == 3
PY2 = sys.version_info[0] == 2
IS_WIN = sys.platform == "win32"
IS_MAC_ARM64 = sys.platform == "darwin" and platform.machine() == "arm64"
ROOT = os.path.realpath(os.path.join(os.path.abspath(__file__), os.path.pardir, os.path.pardir))
IS_ZIPAPP = os.path.isfile(ROOT)
WIN_CPYTHON_2 = IS_CPYTHON and IS_WIN and PY2
_CAN_SYMLINK = _FS_CASE_SENSITIVE = _CFG_DIR = _DATA_DIR = None
def fs_is_case_sensitive():
global _FS_CASE_SENSITIVE
if _FS_CASE_SENSITIVE is None:
with tempfile.NamedTemporaryFile(prefix="TmP") as tmp_file:
_FS_CASE_SENSITIVE = not os.path.exists(tmp_file.name.lower())
logging.debug("filesystem is %scase-sensitive", "" if _FS_CASE_SENSITIVE else "not ")
return _FS_CASE_SENSITIVE
def fs_supports_symlink():
global _CAN_SYMLINK
if _CAN_SYMLINK is None:
can = False
if hasattr(os, "symlink"):
if IS_WIN:
with tempfile.NamedTemporaryFile(prefix="TmP") as tmp_file:
temp_dir = os.path.dirname(tmp_file.name)
dest = os.path.join(temp_dir, "{}-{}".format(tmp_file.name, "b"))
try:
os.symlink(tmp_file.name, dest)
can = True
except (OSError, NotImplementedError):
pass
logging.debug("symlink on filesystem does%s work", "" if can else " not")
else:
can = True
_CAN_SYMLINK = can
return _CAN_SYMLINK
__all__ = (
"IS_PYPY",
"IS_CPYTHON",
"PY3",
"PY2",
"IS_WIN",
"fs_is_case_sensitive",
"fs_supports_symlink",
"ROOT",
"IS_ZIPAPP",
"WIN_CPYTHON_2",
)
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