> Am 30.11.2020 um 22:51 schrieb Matt Sicker <[email protected]>:
> 
> I think Jesse has articulated my own feelings fairly well here. I will
> note that OSGi has some useful tooling [1] and semantics related to
> semantic versioning, generic Java plugins/modules/components, and some
> other well-explored areas related to compatibility which our own
> plugin ClassLoader only scratches the surface of.
> 
> [1]: https://bnd.bndtools.org/commands/baseline.html
> https://bnd.bndtools.org/commands/diff.html
> 

I’m using https://revapi.org/l <https://revapi.org/l> in my plugins to detect 
incompatible API changes before a release. It seems to work quite similar and 
has support for Jenkins JPI files now. The included maven plugin warns me if I 
try to remove a method that actually might be used by a depending plugin. 

> On Mon, Nov 30, 2020 at 3:45 PM Jesse Glick <[email protected]> wrote:
>> 
>> I do not think switching to a 3.x version number accomplishes much of
>> anything (even if we had done so several weeks ago, when the big
>> changes were landing). I would much rather see Jenkins switch to
>> either a date-based scheme, or just some opaque incrementing number
>> like we have but without the meaningless `2.` prefix. Jenkins releases
>> break compatibility for someone, somehow, all the time; a number tells
>> you nothing about whether _you_ will be affected. We need to publish
>> clear, concise upgrade guides; encourage users to make backups or use
>> a config-as-code workflow; and of course try as hard as we can to not
>> break compatibility to begin with! In the case of JEP-227 & JEP-228
>> there have already been extensive plugin fixes released and few users
>> should actually be affected. Tables-to-divs has apparently caused more
>> regressions, but these should all be fixable long before the LTS.
>> 
>> In theory SemVer could be useful for libraries. In practice it seems
>> like a false promise to me. It is your tests which will tell you if an
>> upgrade is compatible, not some upstream maintainer’s fantasy.
>> Dependabot actually _keeps score_ and tells you whether a given update
>> broke CI for other people, which seems like far more valuable
>> information.
>> 
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> 
> 
> 
> -- 
> Matt Sicker
> Senior Software Engineer, CloudBees
> 
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