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# Copyright (c) 2020-2024 Open Text.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import print_function, division, absolute_import, annotations
import errno
import os
def ensure_dir_exists(filepath: str) -> None:
"""Ensure that a directory exists
If it doesn't exist, try to create it and protect against a race condition
if another process is doing the same.
"""
directory = os.path.dirname(filepath)
if directory != '' and not os.path.exists(directory):
try:
os.makedirs(directory)
except OSError as e:
if e.errno != errno.EEXIST:
raise
def check_file_readable(filename: str) -> None:
"""Ensure this is a readable file"""
if not os.path.exists(filename):
raise OSError('{} does not exist'.format(filename))
elif not os.path.isfile(filename):
raise OSError('{} is not a file'.format(filename))
elif not os.access(filename, os.R_OK):
raise OSError('{} is not readable'.format(filename))
def check_file_writable(filename: str) -> None:
"""Ensure this is a writable file. If the file doesn't exist,
ensure its directory is writable.
"""
if os.path.exists(filename):
if not os.path.isfile(filename):
raise OSError('{} is not a file'.format(filename))
if not os.access(filename, os.W_OK):
raise OSError('{} is not writable'.format(filename))
# If target does not exist, check permission on parent dir
ensure_dir_exists(filename)
pdir = os.path.dirname(filename)
if not pdir:
pdir = '.'
if not os.path.isdir(pdir):
raise OSError('{} is not a directory'.format(pdir))
if not os.access(pdir, os.W_OK):
raise OSError('Directory {} is not writable'.format(pdir))
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