in Kotlin/addManifestPlaceholderFromTask/app/build.gradle.kts [42:47]
fun taskAction() {
val manifest = mergedManifest.asFile.get().readText()
// ensure that merged manifest contains the right activity name.
if (!manifest.contains("activity android:name=\"android.intent.action.MAIN"))
throw RuntimeException("Manifest Placeholder not replaced successfully")
}