Hey guys, quick question from someone who used KMM last time two years ago. In a multi-module projec...

# multiplatform

[Davide Giuseppe Farella]

Hey guys, quick question from someone who used KMM last time two years ago.
In a multi-module project, is it better to have a separate app module per client or a single multi-platform module? ( Note that for now I’ll focus on Android only )
I created an app module Jvm+Android, but I’ve seen a very old problem on Android Studio, which is the “Unresolved reference” for components from multiplatform modules. It compiles, but it’s impossible to work in this way.
Any drawback in having an app module that is KMM+Android only?

[Big Chungus]

Recommended practice is to have kmp lib modules consumed by standalone app modules per target

[Big Chungus]

That way you can move more freely with your app setup without being coupled to other targets

[Davide Giuseppe Farella]

Thanks. Sorry I realized I explained it poorly. What you mentioned is my plan, but question is: should the Android app module be:
1. Standard JVM + Android
2. Kotlin Multiplatform ( with Android only )

[Davide Giuseppe Farella]

Because the first one seems to cause issues in Android Studio with “unresolved reference”

[Big Chungus]

Option one. i.e. app modules do not use kmp plugin (except for ios world where there are no other alternatives)

[Big Chungus]

Does your kmp lib module declare jvm, android or both targets?

[Big Chungus]

Also how are you applying it to the app module?

[Davide Giuseppe Farella]

jvm only,

[Big Chungus]

If your project is oss i could have a proper look for issues

[Davide Giuseppe Farella]

Ok, let me push my most recent changes

[Davide Giuseppe Farella]

https://github.com/4face-studi0/CineScout/tree/feat/android-client

[Davide Giuseppe Farella]

Kotlin plugin: https://github.com/4face-studi0/CineScout/tree/feat/android-client/plugins/kotlin/src/main/kotlin

Android plugin: https://github.com/4face-studi0/CineScout/tree/feat/android-client/plugins/android/src/main/kotlin

[Big Chungus]

Wait, the project is not a mpp project

[Big Chungus]

It's a jvm-only project with gradle and kotlin plugins

[Big Chungus]

What am I missing?

[Davide Giuseppe Farella]

look in cinescout dir 😄

[Big Chungus]

Could you pinpoint me to some module where you;re observing issues with current setup?

[Davide Giuseppe Farella]

For example android/app, in the file AppModule.kt , CineScoutModule is not resolved

[Davide Giuseppe Farella]

The project builds correctly tho

[Big Chungus]

Ah, might be a case of IDEA not supporting KMP composite builds yet.

[Big Chungus]

They work in some cases, but in the others you need to publish your KMP stuff to mavenLocal() or similar before being able to resolve it

[Davide Giuseppe Farella]

That’s terrible 😄

[Big Chungus]

Not ideal, but not that bad too. Just an extra intermediate gradle publishToMavenLocal step

[Davide Giuseppe Farella]

How do you suggest to integrate it? Is there any article or doc about it?

[Big Chungus]

Not aware of any docs for it. Still waiting for IJ to finish indexing your project and then I'll see what can be tweaked to make it work semi-conveniently

[Davide Giuseppe Farella]

Ok, thank you so much

[Big Chungus]

No worries. I use these pesky issues as an opportunity to teach myself stuff, makes learning interesting 😄

[Davide Giuseppe Farella]

I rather learn other stuff, than fixing build issues 😛

[Big Chungus]

Welp, got an easy fix for you

[Davide Giuseppe Farella]

😵

[Big Chungus]

No code changes needed, just bump tour intellij to 2022.2-RC 😄

[Big Chungus]

[Davide Giuseppe Farella]

I’m actually on Android Studio, can I build it from IntelliJ?

[Big Chungus]

You sure can

[Davide Giuseppe Farella]

Community Edition as well?

[Big Chungus]

But you'll need an IJ Ultimate which is not free...

[Davide Giuseppe Farella]

Yep, indeed 😛 I had the licence, but I found myself not using it for exactly 2 years 😄

[Big Chungus]

Otherwise you'll either have to wait for AS to catch up on the newer builds of IJ or fully decouple your gradle included builds and instead use mavenLocal() repository

[Davide Giuseppe Farella]

Oh wait, I’d need to publish only the composite builds, aka Gradle plugins to Maven local?

[Big Chungus]

Correct

[Davide Giuseppe Farella]

I understood I’d need to publish my whole kmp bundle of libs 😄

[Davide Giuseppe Farella]

Ok, so that’s acceptable

[Big Chungus]

then in your app modules you'd apply the plugins as normal (with version specified) and declare mavenLocal() as a top plugins repo

[Davide Giuseppe Farella]

Ok, sounds great!

[Big Chungus]

Give it a go and ping back here if you still get stuck. Remember, key point here is to simply avoid gradle included (composite) builds in your project

[Davide Giuseppe Farella]

Would that be required for every plugins or only the ones applied to my Android modules? (

[Davide Giuseppe Farella]

Ok, I guess you already answered me then 🙂

[Big Chungus]

Anything that you currently are applying via included build

[Davide Giuseppe Farella]

Ok, I’ll give it a go later or maybe in the week-end, as that’s my pet project and I’m supposed to work now 😛
I’ll ping you back! Thank you so much for now!

[Big Chungus]

No worries, good luck

[Davide Giuseppe Farella]

I gave it a try, but doesn’t seems like it got solved 😞

[Davide Giuseppe Farella]

I took a look on the net by the way, I seen the issues you mentioned, but only when the dependency is actually from a composite build, while my only composite build are the Gradle plugins: the app modules uses other modules inside cinescout directory, which are other modules of the same project

[Davide Giuseppe Farella]

Nvm, it actually works like a charm on IntelliJ CE. Why do I even use Android Studio? 🤣

[Big Chungus]

Wait what? Ij CE supports android development??

[Big Chungus]

I could've sworn you needed ultimate for that!

[Davide Giuseppe Farella]

Seems like it 🙂 i actually read on JetBrains website yesterday and they said so. 2022.1 it tells me I need at least IntelliJ 2021.something, on 2022.2 rc all smooth

[Davide Giuseppe Farella]

Impressively even the speed I built and run and Android app. I'd take 3x times with Android Studio

[Big Chungus]

Good to know!