Hi Matthias, One of the problems of adding support for Scala 3 for the scala-streams submodule is that we would need to have another build run on CI (which is already extremely long). I guess we could restrict this only when having changes on the Stream module(s). If I remember it correctly, when I tried to port Kafka to Scala 3 (as a whole) the sentiment was that only 2 versions of Scala should be supported at a time. Kafka 4.0.0 will remove support for Scala 2.12. I'll wait for others to chime in. Maybe Ismael has some thoughts about it.
Best, On Sat, Feb 10, 2024 at 1:55 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 > -- [image: Aiven] <https://www.aiven.io> *Josep Prat* Open Source Engineering Director, *Aiven* josep.p...@aiven.io | +491715557497 aiven.io <https://www.aiven.io> | <https://www.facebook.com/aivencloud> <https://www.linkedin.com/company/aiven/> <https://twitter.com/aiven_io> *Aiven Deutschland GmbH* Alexanderufer 3-7, 10117 Berlin Geschäftsführer: Oskari Saarenmaa & Hannu Valtonen Amtsgericht Charlottenburg, HRB 209739 B
