AGP 9.0.0 compability issues

[syslogic]

Describe the bug

Plugin cannot be applied, when removing the Kotlin Android plugin, as suggested:

Solution: Remove the org.jetbrains.kotlin.android plugin from this project's build file ...

Tasks executed

Any. It already fails when applying the plugin.

Expected behavior

Just build.

Additional context (if a crash, provide stack trace)

In short:

Caused by: org.gradle.api.UnknownDomainObjectException: Extension of type 'BaseAppModuleExtension' does not exist. Currently registered extension types: [ExtraPropertiesExtension, LibrariesForLibs, VersionCatalogsExtension, BasePluginExtension, SourceSetContainer, ReportingExtension, JavaToolchainService, JavaPluginExtension, KotlinAndroidProjectExtension, ApplicationExtension, ApplicationAndroidComponentsExtension, LintLifecycleExtension, KtlintExtension, PublishingExtensionImpl, PlayPublisherExtension]

Based upon this AGP issue before:

An exception occurred applying plugin request [id: 'org.jetbrains.kotlin.android', version: '2.2.21']
> Failed to apply plugin 'org.jetbrains.kotlin.android'.
   > Failed to apply plugin 'com.jetbrains.kotlin.android'
     The 'org.jetbrains.kotlin.android' plugin is no longer required for Kotlin support since AGP 9.0.
     Solution: Remove the 'org.jetbrains.kotlin.android' plugin from this project's build file: mobile\build.gradle.kts.
     See https://issuetracker.google.com/438678642 for more details.
      > java.lang.Throwable (no error message)

How To Reproduce

See "Tasks executed"

Versions

Plugin 4.0.0
Gradle 9.3.0
AGP 9.0.0

[syslogic]

This basically is option android.builtInKotlin=true set to value true by default. See Migrate to built-in Kotlin.

gradle-play-publisher/play/plugin/src/main/kotlin/com/github/triplet/gradle/play/PlayPublisherPlugin.kt

Line 188 in 50cf62f

val android = project.extensions.getByType<ApplicationExtension>()

---

The suggestion to remove the plugin is misleading, as BaseAppModuleExtension is then unknown.
One instead has to replace org.jetbrains.kotlin.android with com.android.built-in-kotlin.

# kotlin_android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
builtin_kotlin   = { id = "com.android.built-in-kotlin", version.ref = "android_gradle_plugin" }
legacy_kapt      = { id = "com.android.legacy-kapt", version.ref = "android_gradle_plugin" }

In build.gradle.kts.

plugins {
    // alias(libs.plugins.kotlin.android) apply false
    alias(libs.plugins.builtin.kotlin) apply false
    alias(libs.plugins.legacy.kapt) apply false
}

[github-actions]

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