I am working on my KMM backend server and I got this error: ```The 'java' plugin has been applied, b...

# multiplatform

[James Black]

I am working on my KMM backend server and I got this error:

The 'java' plugin has been applied, but it is not compatible with the Android plugins.

In my shared build.gradle I have this. If I just use jvm() instead no issues, except it goes to androidMain not jvmMain.

kotlin {
    android()
    jvm {
        withJava()
    }

I have a sinking feeling it won't be resolved any time soon based on this issue:
https://youtrack.jetbrains.com/issue/KT-30878

Is the best bet to just have web and server have one KMM project and android/iOS and everything else have the other, or should servers just not be in the KMM project currently?

[ephemient]

kotlin { android() jvm() } works as long as you avoid `kotlin.jvm.withJava()`; do you need it?

[James Black]

I would prefer to have the server code get info from jvmMain but I am stuck with it pulling from androidMain. I just minimize what it needs from shared.

[ephemient]

I'm not sure what you're doing exactly, but I would not use the same MPP project for multiple binaries. common code in MPP, then separate project for Android, JVM, and web applications.

[James Black]

Yes. My server project connects to androidMain. Each common project has its own Platform class so I can tell. I have iOS and Android also separate but all connect to a shared project. It is my backend server that has a problem.

[ephemient]

if your backend is pulling in the wrong configuration without withJava(), it sounds like a dependency issue that is better resolved there rather than using withJava() here as a workaround

[ephemient]

is that the only reason you need it or is there something else? yeah, there probably is not any road to making android and jvm.withJava() work together

[James Black]

You can look at https://github.com/jblack975/MyOutfitPicker and see how it is set up.

When I start up the server I get this output.

Wrong shared subproject.

Due to this:

try {
    val s = println(Platform().platform)
} catch(e:Throwable) { println("Wrong shared subproject.")}

It tries to execute this line:

actual val platform: String = "Android ${android.os.Build.VERSION.SDK_INT}"

[ephemient]

what kotlin version are you using? it's not in the repo

[ephemient]

I see your server is using kotlin-platform-jvm; this is deprecated and should not be used

[ephemient]

if I set kotlinVersion=1.6.10 and remove that plugin, the server looks like it picks up the right variant

[James Black]

When I try and have it as this, and have the commented out line in the jvmMain project, then API_KEY is "88888", so without the plugin it still doesn't work.

val apiKey = "88888"//BuildKonfig.api_key

val weatherClientApiKey = BuildKonfig.weather_client_api_key
actual class Platform actual constructor() {
    actual val platform: String = "Android "

}

So regardless, with or without the plugin it still goes to shared/androidMain, not jvmMain, with Kotlin 1.6.10 or 1.6.20.
Thanks for trying though. Guessing it will just be broken for the foreseeable future.