54 lines
1.7 KiB
Python
54 lines
1.7 KiB
Python
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# Copyright 2017 Linaro Limited
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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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Semi Semantic Versioning
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Implements a subset of semantic versioning that is supportable by the image
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header.
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"""
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from collections import namedtuple
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import re
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SemiSemVersion = namedtuple('SemiSemVersion', ['major', 'minor', 'revision',
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'build'])
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version_re = re.compile(
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r"""^([1-9]\d*|0)(\.([1-9]\d*|0)(\.([1-9]\d*|0)(\+([1-9]\d*|0))?)?)?$""")
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def decode_version(text):
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"""Decode the version string, which should be of the form maj.min.rev+build
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"""
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m = version_re.match(text)
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if m:
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result = SemiSemVersion(
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int(m.group(1)) if m.group(1) else 0,
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int(m.group(3)) if m.group(3) else 0,
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int(m.group(5)) if m.group(5) else 0,
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int(m.group(7)) if m.group(7) else 0)
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return result
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else:
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msg = "Invalid version number, should be maj.min.rev+build with later "
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msg += "parts optional"
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raise ValueError(msg)
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if __name__ == '__main__':
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print(decode_version("1.2"))
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print(decode_version("1.0"))
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print(decode_version("0.0.2+75"))
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print(decode_version("0.0.0+00"))
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