Re: Decide on official Isar release cycle

["'Jan Kiszka' via isar-users" <isar-users@googlegroups.com>]

On 16.12.25 13:27, Baurzhan Ismagulov wrote:
> On 2025-12-16 12:36, 'Jan Kiszka' via isar-users wrote:
>>> We could think about starting with two releases per year, gaining experience
>>> (esp. regarding larger code changes) and seeing which effort it requires.
>>
>> That's the absolute minimum, but will likely not change a lot
>> downstream, at least as long as we find too many issues via the
>> downstream layers, thus potentially to late for a release.
> 
> Ok, let me understand.
> 
> cip-core wants quarterly Isar releases -- good to know.
> What is the cycle?
> 
> Do I understand correctly, if Isar would do quarterly releases, cip-core would
> use Isar tags?

At least, we would try to align then. There can always be reasons to
slightly deviate in concrete case, but so far I was preferring a newer
Isar revision with local, upstream-pending hot-fixes over older Isar
revisions. That is because I know downstream will do own integration
decisions, and the more freedom isar-cip-core can provide by being
compatible with more recent Isar versions, the better.

Not too infrequently, we are also developing Isar features to cater
developments in isar-cip-core, and it is much nicer to consume them via
upstream rather than out-of-tree patches in our layer.

> Then it would go downstream, Isar issues would be found and fixed (which
> suggests extending Isar testsuite).
> Is your point that the next Isar release a quarter later would be soon enough
> for the downstreams?
> 
> In any case, we could still try 1.1 in 2026-Q3 and then revisit this topic.
> 

2 release per year would be an improvement, and we can try this if you
consider it a reasonable balance between stabilization effort on the one
side and community value on the other.

Jan

-- 
Siemens AG, Foundational Technologies
Linux Expert Center

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