43 lines
1.3 KiB
Python
43 lines
1.3 KiB
Python
# -*- coding: utf-8 -*- #
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# Copyright 2020 Google LLC. All Rights Reserved.
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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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"""Helpers for parsing common arguments."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import unicode_literals
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def ParseSortByArg(sort_by=None):
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"""Parses and creates the sort by object from parsed arguments.
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Args:
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sort_by: list of strings, passed in from the --sort-by flag.
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Returns:
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A parsed sort by string ending in asc or desc, conforming to
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https://aip.dev/132#ordering
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"""
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if not sort_by:
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return None
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fields = []
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for field in sort_by:
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if field.startswith('~'):
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field = field.lstrip('~') + ' desc'
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else:
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field += ' asc'
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fields.append(field)
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return ','.join(fields)
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