from __future__ import annotations
import logging
import os
import platform
import sys
import tempfile
IMPLEMENTATION = platform.python_implementation()
IS_PYPY = IMPLEMENTATION == "PyPy"
IS_GRAALPY = IMPLEMENTATION == "GraalVM"
IS_CPYTHON = IMPLEMENTATION == "CPython"
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)
_CAN_SYMLINK = _FS_CASE_SENSITIVE = _CFG_DIR = _DATA_DIR = None
LOGGER = logging.getLogger(__name__)
def fs_is_case_sensitive():
global _FS_CASE_SENSITIVE # noqa: PLW0603
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())
LOGGER.debug("filesystem is %scase-sensitive", "" if _FS_CASE_SENSITIVE else "not ")
return _FS_CASE_SENSITIVE
def fs_supports_symlink():
global _CAN_SYMLINK # noqa: PLW0603
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, f"{tmp_file.name}-{'b'}")
try:
os.symlink(tmp_file.name, dest)
can = True
except (OSError, NotImplementedError):
pass
LOGGER.debug("symlink on filesystem does%s work", "" if can else " not")
else:
can = True
_CAN_SYMLINK = can
return _CAN_SYMLINK
def fs_path_id(path: str) -> str:
return path.casefold() if fs_is_case_sensitive() else path
__all__ = (
"IS_CPYTHON",
"IS_GRAALPY",
"IS_MAC_ARM64",
"IS_PYPY",
"IS_WIN",
"IS_ZIPAPP",
"ROOT",
"fs_is_case_sensitive",
"fs_path_id",
"fs_supports_symlink",
)
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