Configuring your sourceCompatibility, targetCompatibility and kotlinOptions.jvmTarget all at once

Recently I learnt a trick that you can set sourceCompatibility, targetCompatibility and kotlinOptions.jvmTarget all at once:

Step 1: In your root project’s build.gradle.kts , add the following script:

val jvmVersion: Provider<String> = providers.gradleProperty("kotlin.jvm.target")

configure(subprojects) {
    // Apply compileOptions to subprojects
    plugins.withType<com.android.build.gradle.BasePlugin>().configureEach {
        extensions.findByType<com.android.build.gradle.BaseExtension>()?.apply {
            jvmVersion.map { JavaVersion.toVersion(it) }.orNull?.let {
                compileOptions {
                    sourceCompatibility = it
                    targetCompatibility = it
                }

            }
        }
    }

    // Apply kotlinOptions.jvmTarget to subprojects
    tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile>().configureEach {
        kotlinOptions {
            if (jvmVersion.isPresent) jvmTarget = jvmVersion.get()
        }
    }
}

Step 2: In your gradle.properties , add the following line:

kotlin.jvm.target=17

Step 3: Now you can remove all sourceCompatibility, targetCompatibility and kotlinOptions.jvmTarget from your subprojects.

Done, now you can enjoy single source of truth for your subprojects!