Make kotlin-android-extensions always cause a compilation error.

kotlin-android-extensions are deprecated and have been scheduled
for removal in 1.8.0.

https://android-developers.googleblog.com/2022/02/discontinuing-kotlin-synthetics-for-views.html

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/android/internal/AndroidSubplugin.kt

@@ -36,8 +36,8 @@ class AndroidExtensionsSubpluginIndicator @Inject internal constructor(private v
         registry.register(KotlinAndroidExtensionModelBuilder())
         project.plugins.apply(AndroidSubplugin::class.java)
 
-        project.logger.warn(
+        project.logger.error(
-            "Warning: The 'kotlin-android-extensions' Gradle plugin is deprecated. " +
+            "Error: The 'kotlin-android-extensions' Gradle plugin is no longer supported. " +
                     "Please use this migration guide (https://goo.gle/kotlin-android-extensions-deprecation) to start " +
                     "working with View Binding (https://developer.android.com/topic/libraries/view-binding) " +
                     "and the 'kotlin-parcelize' plugin."

plugins/android-extensions/android-extensions-compiler/build.gradle.kts

@@ -20,6 +20,7 @@ dependencies {
     compileOnly(project(":compiler:ir.backend.common"))
     compileOnly(project(":compiler:backend.jvm"))
     compileOnly(project(":compiler:ir.tree"))
+    compileOnly(project(":compiler:cli"))
     compileOnly(project(":kotlin-android-extensions-runtime"))
     compileOnly(intellijCore())
     compileOnly(commonDependency("org.jetbrains.intellij.deps:asm-all"))

plugins/android-extensions/android-extensions-compiler/src/org/jetbrains/kotlin/android/synthetic/AndroidComponentRegistrar.kt

@@ -30,6 +30,8 @@ import org.jetbrains.kotlin.android.synthetic.res.AndroidVariant
 import org.jetbrains.kotlin.android.synthetic.res.CliAndroidLayoutXmlFileManager
 import org.jetbrains.kotlin.android.synthetic.res.CliAndroidPackageFragmentProviderExtension
 import org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension
+import org.jetbrains.kotlin.cli.common.CLIConfigurationKeys
+import org.jetbrains.kotlin.cli.common.messages.CompilerMessageSeverity
 import org.jetbrains.kotlin.codegen.extensions.ClassBuilderInterceptorExtension
 import org.jetbrains.kotlin.codegen.extensions.ExpressionCodegenExtension
 import org.jetbrains.kotlin.compiler.plugin.*
@@ -103,6 +105,16 @@ class AndroidCommandLineProcessor : CommandLineProcessor {
 @Suppress("DEPRECATION")
 class AndroidComponentRegistrar : ComponentRegistrar {
     companion object {
+        fun reportRemovedError(configuration: CompilerConfiguration) {
+            val errorMessage =
+                "The Android extensions ('kotlin-android-extensions') compiler plugin is no longer supported. " +
+                        "Please use kotlin parcelize and view binding. " +
+                        "More information: https://goo.gle/kotlin-android-extensions-deprecation"
+            configuration.get(CLIConfigurationKeys.MESSAGE_COLLECTOR_KEY)
+                ?.report(CompilerMessageSeverity.ERROR, errorMessage, null)
+                ?: throw IllegalStateException(errorMessage)
+        }
+
         fun registerParcelExtensions(project: Project) {
             ExpressionCodegenExtension.registerExtension(project, ParcelableCodegenExtension())
             IrGenerationExtension.registerExtension(project, ParcelableIrGeneratorExtension())
@@ -153,6 +165,8 @@ class AndroidComponentRegistrar : ComponentRegistrar {
     }
 
     override fun registerProjectComponents(project: MockProject, configuration: CompilerConfiguration) {
+        reportRemovedError(configuration)
+
         val features = configuration.get(AndroidConfigurationKeys.FEATURES) ?: AndroidExtensionsFeature.values().toSet()
         val isExperimental = configuration.get(AndroidConfigurationKeys.EXPERIMENTAL) == "true"