57 lines
2.0 KiB
Python
57 lines
2.0 KiB
Python
# encoding: utf-8
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# This file is part of requirements-parser library.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License 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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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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# SPDX-License-Identifier: Apache-2.0
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import re
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from typing import Dict, List, Optional, Tuple, cast
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# Copied from pip
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# https://github.com/pypa/pip/blob/281eb61b09d87765d7c2b92f6982b3fe76ccb0af/pip/index.py#L947
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HASH_ALGORITHMS = set(['sha1', 'sha224', 'sha384', 'sha256', 'sha512', 'md5'])
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extras_require_search = re.compile(r'(?P<name>.+)\[(?P<extras>[^\]]+)\]')
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def parse_fragment(fragment_string: str) -> Dict[str, str]:
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"""Takes a fragment string nd returns a dict of the components"""
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fragment_string = fragment_string.lstrip('#')
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try:
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return dict(cast(Tuple[str, str], tuple(key_value_string.split('='))) for key_value_string in
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fragment_string.split('&'))
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except ValueError:
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raise ValueError(f'Invalid fragment string {fragment_string}')
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def get_hash_info(d: Dict[str, str]) -> Tuple[Optional[str], Optional[str]]:
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"""Returns the first matching hashlib name and value from a dict"""
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for key in d.keys():
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if key.lower() in HASH_ALGORITHMS:
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return key, d[key]
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return None, None
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def parse_extras_require(egg: Optional[str]) -> Tuple[Optional[str], List[str]]:
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if egg is not None:
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match = extras_require_search.search(egg)
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if match is not None:
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name = match.group('name')
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extras = match.group('extras')
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return name, [extra.strip() for extra in extras.split(',')]
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return egg, []
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