28 lines
955 B
Python
28 lines
955 B
Python
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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 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', 'build'])
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version_re = re.compile(r"""^([1-9]\d*)(\.([1-9]\d*)(\.([1-9]\d*)(\+([a-z1-9-][a-z0-9-]*))?)?)?$""")
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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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# print("decode:", text)
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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 parts optional"
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raise argparse.ArgumentTypeError(msg)
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