Issue with Android Build `org.jetbrains.kotlin.plugin.compose` dependency

[MarcStdt]

My team is about to implement the new version of this package.
It works well on ios, but sadly the android build is not successful.

We get the following error:

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/mschottstadt/Development/frontend/smava-mobile-app/node_modules/@fintecsystems/xs2a-react-native/android/build.gradle' line: 21

* What went wrong:
Plugin [id: 'org.jetbrains.kotlin.plugin.compose', version: '1.9.25'] was not found in any of the following sources:

- Gradle Core Plugins (plugin is not in 'org.gradle' namespace)
- Included Builds (None of the included builds contain this plugin)
- Plugin Repositories (could not resolve plugin artifact 'org.jetbrains.kotlin.plugin.compose:org.jetbrains.kotlin.plugin.compose.gradle.plugin:1.9.25')
  Searched in the following repositories:
    Gradle Central Plugin Repository

* Try:
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> Get more help at https://help.gradle.org.

BUILD FAILED in 15s
23 actionable tasks: 5 executed, 18 up-to-date

I am not sure whats wrong there. It works with the old version.

[maik-mursall]

Hi @MarcStdt 👋🏻,
that is weird, because the value of the version should be "2.0.21" and not "1.9.25".

Can you make sure, that you didn't override the following Gradle-Property in your repository?:
Xs2aReactNative_kotlinVersion.

And using your path as an example, can you verify that the value specified in /Users/mschottstadt/Development/frontend/smava-mobile-app/node_modules/@fintecsystems/xs2a-react-native/android/gradle.properties is equal to "2.0.21"? :)

[MarcStdt]

Hi @maik-mursall,
sorry for the late response. I was able to find the root cause of this issue.
I am not that familiar with the internal of react-native toolchain, but it looks like the grade.properties from this package do not dictate, wich kotlin version gets used (at least it looks like so to me).
After an upgrade to react native 0.79, the error went away.
This is also the version, where Kotlin got updated:
https://github.com/facebook/react-native/blob/9c5fc7958183963f1bed54fc4c1a68983bf178f3/packages/react-native/gradle/libs.versions.toml#L27

I think this issue is. Resolved now, where we are planning our update to 0.79 anyways :)

[maik-mursall]

I just had time to dig a bit deeper and found out that React-Native actually overrides the version.

Reason is this function being used to retrieve such values:

ext.getExtOrDefault = {name ->
  return rootProject.ext.has(name) ? rootProject.ext.get(name) : project.properties['Xs2aReactNative_' + name]
}

In this case, if the host app (yours in this case) or at any other point above this SDK in the dependency hierachy defines the "kotlinVersion" property, that's then the value being used. "Xs2aReactNative_kotlinVersion" in this case acts as a default value...

So I guess React-Native <0.78 sets this property to "1.9.25" and that's why the build is failing, because the Compose Plugin is only available for Kotlin v2.X.X.

I'm not sure if I like this approach from the RN-Team, because the compileSdk, etc., will be overridden by the Host-App as well, which is not good in my opinion...

This functionality is part of the library-template, so I'll just change it to always use our values, unless you have a different opinion on this @MarcStdt.
In any case it will take some time for me to build this, because of the A11y Migration of the iOS & Android SDK.