import errno
import xattr
_cached_attributes: dict[tuple, bytes | None] = {}
def getxattr(path: str, attr_name: str) -> bytes | None:
key = (path, attr_name)
if key not in _cached_attributes:
try:
response = xattr.getxattr(path, attr_name)
except OSError as e:
# ENODATA (Linux) or ENOATTR (macOS) means attribute hasn't been set
if e.errno == errno.ENODATA or (hasattr(errno, 'ENOATTR') and e.errno == errno.ENOATTR):
response = None
else:
raise
_cached_attributes[key] = response
return _cached_attributes[key]
def setxattr(path: str, attr_name: str, attr_value: bytes) -> None:
_cached_attributes.pop((path, attr_name), None)
xattr.setxattr(path, attr_name, attr_value)