Why is latest beta-6 using Kotlin 2.0.0-RC1? about apollo-kotlin HOT 3 CLOSED

Hi 👋 The general idea is:

• stable Apollo versions (3.8 right now) are conservative when it comes to Kotlin versions and will always use latest stable (or even older one if there's no reason to upgrade)
• alphas/beta use latest KGP but target stable apiVersion/languageVersion.
  • On JVM projects, there should be no issue using apollo:4.0.0-beta.6 with Kotlin 1.9.x.
  • It's a bit less clear on Native/JS because there's no languageVersion support for native (related Youtrack)

What we've seen so far is that KMP projects usually need to track the Kotlin version pretty closely because that part of the ecosystem is moving quite fast. If it's slowing down we'll consider being more conservative for alphas/betas as well but being able to use latest build tools while targetting older binaries seems pretty important for the ecosystem overall. I wouldn't give up on this without trying it a bit more. If you have specific issues, please share them so we can make sure the ecosystem evolves smoothly.

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@damianpetla for the record, I asked the question of languageVersion support for non-JVM at KotlinConf and looks like it's not coming any time soon.

One argument is that K/N users need to update their KGP version frequently to track Xcode releases so supporting older versions is not very high on the todo list.

As for us, I think we'll continue doing the following:

• update KGP as soon as possible and set languageVersion = n - 1
• gives ~1 year of upgrade time for JVM
• non-JVM users will have to update KGP in their build before they can update to the latest Apollo version. They can obviously keep using the older versions of Apollo.

f you see any compatibility issue on the JVM, please raise them and we'll investigate.

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