Change KotlinGradleSubplugin deprecation level to ERROR.

^KT-48830 Fixed

libraries/examples/kotlin-gradle-subplugin-example/src/main/kotlin/example/ExampleLegacySubplugin.kt

@@ -20,7 +20,7 @@ import org.gradle.api.Project
 import org.gradle.api.tasks.compile.AbstractCompile
 import org.jetbrains.kotlin.gradle.plugin.*
 
-class ExampleLegacySubplugin : @Suppress("DEPRECATION") KotlinGradleSubplugin<AbstractCompile> {
+class ExampleLegacySubplugin : @Suppress("DEPRECATION_ERROR") KotlinGradleSubplugin<AbstractCompile> {
 
     override fun isApplicable(project: Project, task: AbstractCompile): Boolean {
         return true

libraries/tools/kotlin-allopen/src/main/kotlin/org/jetbrains/kotlin/allopen/gradle/AllOpenSubplugin.kt

@@ -29,7 +29,7 @@ import javax.inject.Inject
 
 class AllOpenGradleSubplugin @Inject internal constructor(private val registry: ToolingModelBuilderRegistry) :
     KotlinCompilerPluginSupportPlugin,
-    @Suppress("DEPRECATION") // implementing to fix KT-39809
+    @Suppress("DEPRECATION_ERROR") // implementing to fix KT-39809
     KotlinGradleSubplugin<AbstractCompile> {
 
     companion object {

libraries/tools/kotlin-gradle-plugin-api/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/KotlinGradleSubplugin.kt

@@ -70,7 +70,8 @@ open class InternalSubpluginOption(key: String, value: String) : SubpluginOption
     message = "This interface will be removed due to performance considerations. " +
             "Please use the KotlinCompilerPluginSupportPlugin interface instead " +
             "and remove the META-INF/services/org.jetbrains.kotlin.gradle.plugin.KotlinGradleSubplugin entry.",
-    replaceWith = ReplaceWith("KotlinCompilerPluginSupportPlugin")
+    replaceWith = ReplaceWith("KotlinCompilerPluginSupportPlugin"),
+    level = DeprecationLevel.ERROR
 )
 interface KotlinGradleSubplugin<in KotlinCompile : AbstractCompile> {
     fun isApplicable(project: Project, task: AbstractCompile): Boolean

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/internal/kapt/Kapt3KotlinGradleSubplugin.kt

@@ -839,7 +839,7 @@ private val BaseVariant.dataBindingDependencyArtifactsIfSupported: FileCollectio
         ?.invoke(this) as? FileCollection
 
 //region Stub implementation for legacy API, KT-39809
-@Suppress("DEPRECATION") // implementing to fix KT-39809
+@Suppress("DEPRECATION_ERROR") // implementing to fix KT-39809
 class Kapt3KotlinGradleSubplugin : KotlinGradleSubplugin<AbstractCompile> {
     override fun isApplicable(project: Project, task: AbstractCompile): Boolean = false
 

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/SubpluginEnvironment.kt

@@ -27,7 +27,7 @@ class SubpluginEnvironment(
         fun loadSubplugins(project: Project): SubpluginEnvironment {
             val kotlinPluginVersion = project.getKotlinPluginVersion()
             return try {
-                @Suppress("DEPRECATION") // support for the deprecated plugin API
+                @Suppress("DEPRECATION_ERROR") // support for the deprecated plugin API
                 val klass = KotlinGradleSubplugin::class.java
                 val buildscriptClassloader = project.buildscript.classLoader
                 val klassFromBuildscript = try {
@@ -44,7 +44,7 @@ class SubpluginEnvironment(
 
                 val result = project.plugins.filterIsInstance<KotlinCompilerPluginSupportPlugin>()
 
-                @Suppress("DEPRECATION", "UNCHECKED_CAST")
+                @Suppress("DEPRECATION_ERROR", "UNCHECKED_CAST")
                 val compatibilitySubplugins = ServiceLoader.load(klass, classloader)
                     .filter { it !is KotlinCompilerPluginSupportPlugin }
                     .map { LegacyKotlinCompilerPluginSupportPlugin(it as KotlinGradleSubplugin<AbstractCompile>) }
@@ -139,7 +139,7 @@ internal fun addCompilationSourcesToExternalCompileTask(compilation: KotlinCompi
 }
 
 internal class LegacyKotlinCompilerPluginSupportPlugin(
-    @Suppress("deprecation") // support for deprecated API
+    @Suppress("DEPRECATION_ERROR") // support for deprecated API
     val oldPlugin: KotlinGradleSubplugin<AbstractCompile>
 ) : KotlinCompilerPluginSupportPlugin {
     override fun isApplicable(kotlinCompilation: KotlinCompilation<*>): Boolean =

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/scripting/internal/ScriptingGradleSubplugin.kt

@@ -213,7 +213,7 @@ private fun Configuration.discoverScriptExtensionsFiles() =
 
 class ScriptingKotlinGradleSubplugin :
     KotlinCompilerPluginSupportPlugin,
-    @Suppress("DEPRECATION") // implementing to fix KT-39809
+    @Suppress("DEPRECATION_ERROR") // implementing to fix KT-39809
     KotlinGradleSubplugin<KotlinCompile> {
     companion object {
         const val SCRIPTING_ARTIFACT_NAME = "kotlin-scripting-compiler-embeddable"

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

@@ -73,7 +73,7 @@ class AndroidExtensionsSubpluginIndicator @Inject internal constructor(private v
 
 class AndroidSubplugin :
     KotlinCompilerPluginSupportPlugin,
-    @Suppress("DEPRECATION") // implementing to fix KT-39809
+    @Suppress("DEPRECATION_ERROR") // implementing to fix KT-39809
     KotlinGradleSubplugin<AbstractCompile>
 {
     override fun isApplicable(kotlinCompilation: KotlinCompilation<*>): Boolean {

libraries/tools/kotlin-noarg/src/main/kotlin/org/jetbrains/kotlin/noarg/gradle/NoArgSubplugin.kt

@@ -29,7 +29,7 @@ import javax.inject.Inject
 
 class NoArgGradleSubplugin @Inject internal constructor(private val registry: ToolingModelBuilderRegistry) :
     KotlinCompilerPluginSupportPlugin,
-    @Suppress("DEPRECATION") // implementing to fix KT-39809
+    @Suppress("DEPRECATION_ERROR") // implementing to fix KT-39809
     KotlinGradleSubplugin<AbstractCompile> {
 
     companion object {

libraries/tools/kotlin-sam-with-receiver/src/main/kotlin/org/jetbrains/kotlin/noarg/gradle/SamWithReceiverSubplugin.kt

@@ -29,7 +29,7 @@ import javax.inject.Inject
 
 class SamWithReceiverGradleSubplugin @Inject internal constructor(private val registry: ToolingModelBuilderRegistry) :
     KotlinCompilerPluginSupportPlugin,
-    @Suppress("DEPRECATION") // implementing to fix KT-39809
+    @Suppress("DEPRECATION_ERROR") // implementing to fix KT-39809
     KotlinGradleSubplugin<AbstractCompile> {
 
     override fun apply(target: Project) {

libraries/tools/kotlin-serialization/src/main/kotlin/org/jetbrains/kotlinx/serialization/gradle/SerializationSubplugin.kt

@@ -28,7 +28,7 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 class SerializationGradleSubplugin :
     KotlinCompilerPluginSupportPlugin,
-    @Suppress("DEPRECATION") // implementing to fix KT-39809
+    @Suppress("DEPRECATION_ERROR") // implementing to fix KT-39809
     KotlinGradleSubplugin<AbstractCompile> {
 
     companion object {