Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.11/site-packages/airflow/_shared/logging/_noncaching.py: 46%

1# Licensed to the Apache Software Foundation (ASF) under one 

2# or more contributor license agreements. See the NOTICE file 

3# distributed with this work for additional information 

4# regarding copyright ownership. The ASF licenses this file 

5# to you under the Apache License, Version 2.0 (the 

6# "License"); you may not use this file except in compliance 

7# with the License. You may obtain a copy of the License at 

8# 

9# http://www.apache.org/licenses/LICENSE-2.0 

10# 

11# Unless required by applicable law or agreed to in writing, 

12# software distributed under the License is distributed on an 

13# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 

14# KIND, either express or implied. See the License for the 

15# specific language governing permissions and limitations 

16# under the License. 

17from __future__ import annotations 

18 

19import os 

20from typing import BinaryIO, TextIO, TypeVar 

21 

22__all__ = [ 

23 "make_file_io_non_caching", 

24] 

25 

26_IO = TypeVar("_IO", TextIO, BinaryIO) 

27 

28 

29def make_file_io_non_caching(io: _IO) -> _IO: 

30 try: 

31 fd = io.fileno() 

32 os.posix_fadvise(fd, 0, 0, os.POSIX_FADV_DONTNEED) 

33 except Exception: 

34 # in case either file descriptor cannot be retrieved or fadvise is not available 

35 # we should simply return the wrapper retrieved by FileHandler's open method 

36 # the advice to the kernel is just an advice and if we cannot give it, we won't 

37 pass 

38 return io