| David Brown | 23f91ad | 2017-05-16 11:38:17 -0600 | [diff] [blame^] | 1 | """ |
| 2 | Semi Semantic Versioning |
| 3 | |
| 4 | Implements a subset of semantic versioning that is supportable by the image header. |
| 5 | """ |
| 6 | |
| 7 | from collections import namedtuple |
| 8 | import re |
| 9 | |
| 10 | SemiSemVersion = namedtuple('SemiSemVersion', ['major', 'minor', 'revision', 'build']) |
| 11 | |
| 12 | version_re = re.compile(r"""^([1-9]\d*)(\.([1-9]\d*)(\.([1-9]\d*)(\+([a-z1-9-][a-z0-9-]*))?)?)?$""") |
| 13 | def decode_version(text): |
| 14 | """Decode the version string, which should be of the form maj.min.rev+build""" |
| 15 | # print("decode:", text) |
| 16 | m = version_re.match(text) |
| 17 | if m: |
| 18 | result = SemiSemVersion( |
| 19 | int(m.group(1)) if m.group(1) else 0, |
| 20 | int(m.group(3)) if m.group(3) else 0, |
| 21 | int(m.group(5)) if m.group(5) else 0, |
| 22 | int(m.group(7)) if m.group(7) else 0) |
| 23 | return result |
| 24 | else: |
| 25 | msg = "Invalid version number, should be maj.min.rev+build with later parts optional" |
| 26 | raise argparse.ArgumentTypeError(msg) |
| 27 | |