Hi guys :wave: I am writting a KMP library and I would want to have an API that is defined in the jv...

# multiplatform

[Rafael Costa]

Hi guys 👋
I am writting a KMP library and I would want to have an API that is defined in the jvm source set, to also be available on android target. Such that android only apps can import the library and use this API.
How can I achieve this? Do I have to replicate the code?
I've tried to use androidMain.dependsOn(jvmMain) but my sample android app still cannot resolve this symbol related to this API defined on jvm source set 🤔

[Spoudel347]

You can not share jvmMain source-set between normal jvm(aka desktop) and android. You can create your own source-set and share between jvm desktop and desktop. I might have an example somewhere.

[Spoudel347]

Here is an example in kamel image
https://github.com/Kamel-Media/Kamel/blob/main/kamel-core/build.gradle.kts

[Spoudel347]

It has commonJvmMain which is shared between android and jvm desktop.

[Rafael Costa]

Ok great. Thank you so much 🙏

[MR3Y]

Just set an intermediate source set that is a parent of android & jvm
https://kotlinlang.slack.com/archives/C3PQML5NU/p1716396739878969?thread_ts=1716396279.518939&cid=C3PQML5NU

[Rafael Costa]

Oh that looks nice.

[Rafael Costa]

Any way to do that without using applyDefaultHierarchyTemplate?

[Rafael Costa]

I don't know what that default hierarchy implies, I was assuming that for a library it would be better to manually define all dependencies

[MR3Y]

why would you not want to use applyDefaultHierarchyTemplate ?

[Rafael Costa]

Like I said, I assumed this was mainly to facilitate dependsOn calls for applications. For libraries, having complete control makes sense in my mind. But I don't know if in practice, there's actually any harm in it 🤔

[MR3Y]

If you want to visualize & have a look at how your hierarchy looks like, you can utilize https://github.com/terrakok/kmp-hierarchy plugin.

[MR3Y]

and if you want to read more about applyDefaultHierarchyTemplate take a look at the doc https://kotlinlang.org/docs/multiplatform-hierarchy.html#additional-configuration

[Rafael Costa]

I see. thank you! 🙂

[MR3Y]

it does create only the sourcesets that you have explicitly declared them. So it won't create any unnecessary source sets

[Rafael Costa]

Looks good yea. Maybe I can use it then. 🙌