79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
# 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.
|
|
|
|
"""Thread safe fnmatch re-implementation.
|
|
|
|
Standard library fnmatch in Python versions <= 2.7.9 has thread safe
|
|
issue, this module is created for such case. see:
|
|
https://bugs.python.org/issue23191
|
|
|
|
.. versionadded:: 3.3
|
|
"""
|
|
|
|
from __future__ import absolute_import
|
|
|
|
import fnmatch as standard_fnmatch
|
|
import os
|
|
import posixpath
|
|
import re
|
|
import sys
|
|
|
|
|
|
if sys.version_info > (2, 7, 9):
|
|
fnmatch = standard_fnmatch.fnmatch
|
|
fnmatchcase = standard_fnmatch.fnmatchcase
|
|
filter = standard_fnmatch.filter
|
|
translate = standard_fnmatch.translate
|
|
else:
|
|
_MATCH_CACHE = {}
|
|
_MATCH_CACHE_MAX = 100
|
|
|
|
translate = standard_fnmatch.translate
|
|
|
|
def _get_cached_pattern(pattern):
|
|
cached_pattern = _MATCH_CACHE.get(pattern)
|
|
if cached_pattern is None:
|
|
translated_pattern = translate(pattern)
|
|
cached_pattern = re.compile(translated_pattern)
|
|
if len(_MATCH_CACHE) >= _MATCH_CACHE_MAX:
|
|
_MATCH_CACHE.clear()
|
|
_MATCH_CACHE[pattern] = cached_pattern
|
|
return cached_pattern
|
|
|
|
def fnmatchcase(filename, pattern):
|
|
cached_pattern = _get_cached_pattern(pattern)
|
|
return cached_pattern.match(filename) is not None
|
|
|
|
def fnmatch(filename, pattern):
|
|
filename = os.path.normcase(filename)
|
|
pattern = os.path.normcase(pattern)
|
|
return fnmatchcase(filename, pattern)
|
|
|
|
def filter(filenames, pattern):
|
|
filtered_filenames = []
|
|
|
|
pattern = os.path.normcase(pattern)
|
|
cached_pattern = _get_cached_pattern(pattern)
|
|
|
|
if os.path is posixpath:
|
|
# normcase on posix is NOP. Optimize it away from the loop.
|
|
for filename in filenames:
|
|
if cached_pattern.match(filename):
|
|
filtered_filenames.append(filename)
|
|
else:
|
|
for filename in filenames:
|
|
norm_name = os.path.normcase(filename)
|
|
if cached_pattern.match(norm_name):
|
|
filtered_filenames.append(filename)
|
|
|
|
return filtered_filenames
|