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"""
A platform independent file lock that supports the with-statement.

.. autodata:: filelock.__version__
   :no-value:

"""
from __future__ import annotations

import sys
import warnings

from ._api import AcquireReturnProxy, BaseFileLock
from ._error import Timeout
from ._soft import SoftFileLock
from ._unix import UnixFileLock, has_fcntl
from ._windows import WindowsFileLock
from .version import version

#: version of the project as a string
__version__: str = version


if sys.platform == "win32":  # pragma: win32 cover
    _FileLock: type[BaseFileLock] = WindowsFileLock
else:  # pragma: win32 no cover
    if has_fcntl:
        _FileLock: type[BaseFileLock] = UnixFileLock
    else:
        _FileLock = SoftFileLock
        if warnings is not None:
            warnings.warn("only soft file lock is available")

#: Alias for the lock, which should be used for the current platform. On Windows, this is an alias for
# :class:`WindowsFileLock`, on Unix for :class:`UnixFileLock` and otherwise for :class:`SoftFileLock`.
FileLock: type[BaseFileLock] = _FileLock


__all__ = [
    "__version__",
    "FileLock",
    "SoftFileLock",
    "Timeout",
    "UnixFileLock",
    "WindowsFileLock",
    "BaseFileLock",
    "AcquireReturnProxy",
]