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47 lines
1.8 KiB
Python
47 lines
1.8 KiB
Python
#
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# All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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# its licensors.
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#
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# For complete copyright and license terms please see the LICENSE at the root of this
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# distribution (the "License"). All use of this software is governed by the License,
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# or, if provided, by the license below or the license accompanying this file. Do not
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# remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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#
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import fnmatch
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import os
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from typing import List
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DEFAULT_ALLOWEDLIST_FILE = os.path.join(os.path.dirname(__file__), 'pal_allowedlist.txt')
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"""The path to the default allowed-list file"""
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class PALAllowedlist:
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"""A utility class used for determining if PAL rules should apply to a particular file path. If a path matches the
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allowed-list, then PAL rules should not apply to that path."""
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def __init__(self, patterns: List[str]) -> None:
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"""Creates a new instance of :class:`PALAllowedlist` from a list of glob patterns
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:param patterns: a list of glob patterns
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"""
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self.patterns: List[str] = patterns
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def is_match(self, path: str) -> bool:
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"""Determines if a path matches the allowed-list
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:param path: the path to match
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:return: True if the path matches the allowed-list, and False otherwise
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"""
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for pattern in self.patterns:
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if fnmatch.fnmatch(path, pattern):
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return True
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return False
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def load() -> PALAllowedlist:
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"""Returns an instance of :class:`PALAllowedlist` created from the glob patterns in :const:`DEFAULT_ALLOWEDLIST_FILE`"""
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with open(DEFAULT_ALLOWEDLIST_FILE) as fh:
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return PALAllowedlist(fh.read().splitlines())
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