Can I ask KGP to set `kotlin-stdlib` version of my project to a specific version for the JVM but not...

# gradle

[mbonnin]

Can I ask KGP to set kotlin-stdlib version of my project to a specific version for the JVM but not for other targets?
I have used coreLibrariesVersion in the past but this has a lot of side effects, especially for targets like JS/Wasm that currently require their kotlin-stdlib to be aligned with the compiler version.

[tapchicoma]

in KMP project?

[mbonnin]

yep

[mbonnin]

I'd like something like jvmCoreLibrariesVersion or something like so

[mbonnin]

Or maybe just for stdlib jvmKotlinStdlibVersion

[mbonnin]

Context is https://github.com/GradleUp/compat-patrouille/pull/24

[tapchicoma]

though kotlin-stdlib-common will enforce newer stdlib version in JVM target

[tapchicoma]

so I would say - no, it is not possible

[mbonnin]

mmm, so if I explicitely do this:

coreLibrariesVersion = "2.0.0"

sourceSets.getByName("wasmJsMain")  {
  dependencies {
    implementation("org.jetbrains.kotlin:kotlin-stdlib:2.2.0")
  }
}

Then my JVM compile classpath will get 2.2.0 no matter what? Nevermind, that seems to work ok

[mbonnin]

That seems to work ok

[tapchicoma]

other way around by having lower version in coreLibrariesVersion may work. Though in general I would advice to not mix stdlib versions

[mbonnin]

other way around by having lower version in coreLibrariesVersion may work

This is what I'm doing (I think?)

[mbonnin]

coreLibrariesVersion is 2.0.0
I "upgrade" it explicitely to "2.2.0" in the dependencies for wasmJsMain

[mbonnin]

Though in general I would advice to not mix stdlib versions

It's an issue for compatibility because if I update everything to 2.2.0, I lose the JVM 2.0.0 consumers

[mbonnin]

Which is a pity considering the JVM supports both apiVersion and languageVersion

[tapchicoma]

State is following:
• KGP adds kotlin-stdlib* dependencies automatically
• If there is a dependency explicitly specified - KGP skips this logic
• kotlin-stdlib-common has a dependency on kotlin-stdlib
So if coreLibrariesVersion is lower than explicit added dependency - it works

[mbonnin]

Gotcha. Would you be open to a setting that sets the JVM kotlinStdlibVersion separately from coreLibrariesVersion?

[mbonnin]

Or maybe 2 settings for JVM vs non-JVM?
• jvmCoreLibrariesVersion
• nonJvmCoreLibrariesVersion
(I know that feels uhhhh... 😅 )

[mbonnin]

Because right now it feels a bit fragile. I'm duplicating some of the KGP logic and I'm not even sure there aren't other wasm/js libraries that need to be upgraded

[tapchicoma]

I doubt - it is a workaround for compatibility problem in Kotlin

[tapchicoma]

and better to solve compatibility problem

[mbonnin]

Yea but this might take a while I think?

[mbonnin]

Anyways, I'll go with that and we'll see where that takes us. Thanks for the insights!

[tapchicoma]

Adding DSL and supporting it also takes an effort 🙂

[mbonnin]

I hear you 💯 :)