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Diffstat (limited to 'tools/mcuboot/imgtool/version.py')
-rw-r--r-- | tools/mcuboot/imgtool/version.py | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/tools/mcuboot/imgtool/version.py b/tools/mcuboot/imgtool/version.py new file mode 100644 index 00000000..030b012c --- /dev/null +++ b/tools/mcuboot/imgtool/version.py @@ -0,0 +1,53 @@ +# Copyright 2017 Linaro Limited +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +""" +Semi Semantic Versioning + +Implements a subset of semantic versioning that is supportable by the image +header. +""" + +from collections import namedtuple +import re + +SemiSemVersion = namedtuple('SemiSemVersion', ['major', 'minor', 'revision', + 'build']) + +version_re = re.compile( + r"""^([1-9]\d*|0)(\.([1-9]\d*|0)(\.([1-9]\d*|0)(\+([1-9]\d*|0))?)?)?$""") + + +def decode_version(text): + """Decode the version string, which should be of the form maj.min.rev+build + """ + m = version_re.match(text) + if m: + result = SemiSemVersion( + int(m.group(1)) if m.group(1) else 0, + int(m.group(3)) if m.group(3) else 0, + int(m.group(5)) if m.group(5) else 0, + int(m.group(7)) if m.group(7) else 0) + return result + else: + msg = "Invalid version number, should be maj.min.rev+build with later " + msg += "parts optional" + raise ValueError(msg) + + +if __name__ == '__main__': + print(decode_version("1.2")) + print(decode_version("1.0")) + print(decode_version("0.0.2+75")) + print(decode_version("0.0.0+00")) |