KSP compatibility with Kotlin/Native and Kotlin/JS about ksp HOT 12 OPEN

we will need to wait for a release of kotlin, then we can update on KSP side.

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Yes. We'll release KSP 1.6.0-RC-1.0.0 later today.

btw, there is a KSP 1.6.0-M1-1.0.0 available if you consider Kotlin 1.6.0-M1.

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Out of curiosity, what is needed to support the native and js platforms?

from ksp.

Currently, the compiler extension point only exists on JVM platform.

from ksp.

Hi. What's the state of JS IR support?

from ksp.

Seems like this has experimental support as of 1.5.20? https://github.com/google/ksp/releases/tag/1.5.20-1.0.0-beta03 Haven't tried it yet, will hopefully be chasing this down myself today

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@dhcoder That release had js support, but only for legacy, not IR. There were changes needed to the compiler for that JetBrains/kotlin#4264. As those are merged now, not sure if we need to wait for a new release of kotlin, or an update in ksp, or both?

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from ksp.

I saw that 1.6.0 is RC now and was curious -- will that contain the hooks necessary to allow KSP to support JS IR?

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When using the kotlin("js") plugin, including the id("com.google.devtools.ksp") plugin (of version 1.7.10-1.0.6) leads to the exception:

java.lang.IllegalStateException: You already registered Kotlin/JS target with another compiler: legacy

It's thrown on the following lines:

kotlin {
    js(IR) {
        binaries.executable()
        browser {}
    }
}

The only way to get rid from this exception (or at least the one could find 🙂) - is to switch to the LEGACY compiler in the lines above.

The issue can be easily fixed by migrating to the kotlin("multiplatform") plugin instead. It seems to be super minor thing, but anyway, it's a little bit strange to use Kotlin Multiplatform when your project is Kotlin/JS-only.

Can add full build.gradle.kts files if needed.

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@andrew-k-21-12 Seems like a bug, can you create an issue for this?

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@neetopia Sure, here it is - #1056. Will remove my reproduce repo when the issue will be closed.

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