Introduce benevolent version comparator

[msrb]

No description provided.

[msrb]

[test]

[msrb]

Ideally, this should land in https://github.com/fabric8-analytics/fabric8-analytics-version-comparator in future. If it's useful.

[tisnik]

Is not it supported by https://pypi.org/project/semantic_version/ library?

[msrb]

Hmm, I am not familiar with the library. So maybe (?) But we are interested in a very special way of comparing versions here.

    Examples:
        BenevolentVersion('1.0.0') == BenevolentVersion('1')  # True
        BenevolentVersion('5.0.RELEASE') == BenevolentVersion('5.0.0')  # True

So we don't want to know whether beta version is greater than alpha. This comparator ignores such release strings and considers the versions equal.

[msrb]

And the reason for such "benevolent" comparator is the weirdness of NVD, where versions don't always reflect the reality.

[tisnik]

I see. Yes in case the SemVer is not followed, let's use Benevolent Class :) IMHO it is a really good candidate for a regular package and for module in our famous fabric8-analytics-comparator.

[tisnik]

ah I forgot - LGTM of course ;)