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"""Convenience layer on top of stdlib's shutil and os"""

import os
import stat
from typing import Callable, TypeVar

from .compat import py311

from distutils import log

try:
    from os import chmod  # pyright: ignore[reportAssignmentType]
    # Losing type-safety w/ pyright, but that's ok
except ImportError:  # pragma: no cover
    # Jython compatibility
    def chmod(*args: object, **kwargs: object) -> None:  # type: ignore[misc] # Mypy reuses the imported definition anyway
        pass


_T = TypeVar("_T")


def attempt_chmod_verbose(path, mode):
    log.debug("changing mode of %s to %o", path, mode)
    try:
        chmod(path, mode)
    except OSError as e:  # pragma: no cover
        log.debug("chmod failed: %s", e)


# Must match shutil._OnExcCallback
def _auto_chmod(
    func: Callable[..., _T], arg: str, exc: BaseException
) -> _T:  # pragma: no cover
    """shutils onexc callback to automatically call chmod for certain functions."""
    # Only retry for scenarios known to have an issue
    if func in [os.unlink, os.remove] and os.name == 'nt':
        attempt_chmod_verbose(arg, stat.S_IWRITE)
        return func(arg)
    raise exc


def rmtree(path, ignore_errors=False, onexc=_auto_chmod):
    """
    Similar to ``shutil.rmtree`` but automatically executes ``chmod``
    for well know Windows failure scenarios.
    """
    return py311.shutil_rmtree(path, ignore_errors, onexc)


def rmdir(path, **opts):
    if os.path.isdir(path):
        rmtree(path, **opts)


def current_umask():
    tmp = os.umask(0o022)
    os.umask(tmp)
    return tmp