As added info on top of what Josep said, in the Scala space most OS software supports Scala 2.12/Scala 2.13 and Scala 3 but with Scala 2.12 specifically the Scala OS community itself wants to eventually have people to stop supporting it (it's in maintenance mode) so it makes sense to tie this into Kafka 4.0.x which will drop Scala 2.12 support.
We should also take care and make sure the Scala 3 version is pinned to 3.3.x since it's part of the LTS[1] series, in other words we should be careful that people won't bump the Scala version to 3.4.x. 1: https://www.scala-lang.org/blog/2022/08/17/long-term-compatibility-plans.html On Sat, Feb 10, 2024 at 11:54 AM Matthias Berndt < matthias.ber...@ttmzero.com> wrote: > Hey there, > > I'd like to discuss a Scala 3 release of the Kafka-Streams-Scala library. > As you might have seen already, I have recently created a ticket > https://issues.apache.org/jira/browse/KAFKA-16237 > and a PR > https://github.com/apache/kafka/pull/15338 > to move this forward. The changes required to make Kafka-Streams-Scala > compile with Scala 3 are trivial; the trickier part is the build system and > the release process > I have made some changes to the build system (feel free to comment on the > above PR about that) that make it possible to test Kafka-Streams-Scala and > build the jar. What remains to be done is the CI and release process. There > is a `release.py` file in the Kafka repository's root directory, which > assumes that all artifacts are available for all supported Scala versions. > This is no longer the case with my changes because while porting > Kafka-Streams-Scala to Scala 3 is trivial, porting Kafka to Scala 3 is less > so, and shouldn't hold back a Scala 3 release of Kafka-Streams-Scala. I > would appreciate some guidance as to what the release process should look > like in the future. > > Oh and I've made a PR to remove a syntax error from release.py. > https://github.com/apache/kafka/pull/15350 > > All the best, > Matthias > -- Matthew de Detrich *Aiven Deutschland GmbH* Immanuelkirchstraße 26, 10405 Berlin Alexanderufer 3-7, 10117 Berlin Amtsgericht Charlottenburg, HRB 209739 B Geschäftsführer: Oskari Saarenmaa & Hannu Valtonen *m:* +491603708037 *w:* aiven.io *e:* matthew.dedetr...@aiven.io
