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Quelle _util.py Sprache: Python |
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from __future__ import annotations
import os import stat import sys from errno import EACCES, EISDIR from pathlib import Path def raise_on_not_writable_file(filename: str) -> None: """ Raise an exception if attempting to open the file for writing would fail. This is done so files that will never be writable can be separated from files that are writable bu locked. :param filename: file to check :raises OSError: as if the file was opened for writing. """ try: # use stat to do exists + can write to check without race condition file_stat = os.stat(filename) # noqa: PTH116 except OSError: return # swallow does not exist or other errors if file_stat.st_mtime != 0: # if os.stat returns but modification is zero that's an invalid os. if not (file_stat.st_mode & stat.S_IWUSR): raise PermissionError(EACCES, "Permission denied", filename) if stat.S_ISDIR(file_stat.st_mode): if sys.platform == "win32": # pragma: win32 cover # On Windows, this is PermissionError raise PermissionError(EACCES, "Permission denied", filename) else: # pragma: win32 no cover # noqa: RET506 # On linux / macOS, this is IsADirectoryError raise IsADirectoryError(EISDIR, "Is a directory", filename) def ensure_directory_exists(filename: Path | str) -> None: """ Ensure the directory containing the file exists (create it if necessary). :param filename: file. """ Path(filename).parent.mkdir(parents=True, exist_ok=True) __all__ = [ "ensure_directory_exists", "raise_on_not_writable_file", ] ¤ Dauer der Verarbeitung: 0.20 Sekunden (vorverarbeitet) ¤*© Formatika GbR, Deutschland |
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2026-03-28