I enabled the new 1.5 experimental features as outlined below using the "compileKotlin" block with l...

# announcements

[Andrew]

I enabled the new 1.5 experimental features as outlined below using the "compileKotlin" block with language/api verison as 1.5. This works except I get errors on an additional test sourceSet "Task :compileLongTestKotlin FAILED" "Class 'xx' is compiled by a pre-release version of Kotlin and cannot be loaded by this version of the compiler. I had the same issue with my test folder so added "compileTestKotlin" block with the 1.5 options which worked. Adding the same for my additional sourceset results in "Could not find method compileLongTestKotlin()"

https://blog.jetbrains.com/kotlin/2021/02/new-language-features-preview-in-kotlin-1-4-30/#sealed-interfaces

[Marc Knaup]

How do you set language version 1.5 exactly?
All source sets and projects that depends on 1.5 code also need to have language version 1.5 set.

[Andrew]

Just with this in build.gradle

compileKotlin {
kotlinOptions {
languageVersion = "1.5"
apiVersion = "1.5"
}
}

And then unit tests didn't work until I added

compileTestKotlin {
kotlinOptions {
languageVersion = "1.5"
apiVersion = "1.5"
}
}

But now I have a 3rd sourceSet (another type of test) which I can't get to work. This is all the same project/module

[Vampire]

Can you share an MCVE that reproduces your problem? Then it is much easier to maybe see your problem.

[ilya.gorbunov]

You can use the following construction to set kotlinOptions for all Kotlin compilations in the project:

tasks.withType(org.jetbrains.kotlin.gradle.dsl.KotlinCompile::class) {
    kotlinOptions { ... }
}

[Andrew]

Is that the kts syntax? I'm not using gradle kts but got it to work with a modified version of that

[ilya.gorbunov]

Yes. In Groovy scripts, you can use the same, just without the ::class part.

[Animesh Sahu]

You can tasks.withType<KotlinCompile> { ... } as well o.O, it'll evaluate configuration block for all the tasks with given type.