[Gradle][MPP] Deprecate several K/N targets

libraries/tools/kotlin-gradle-plugin-dsl-codegen/src/main/kotlin/org/jetbrains/kotlin/generators/gradle/dsl/KotlinArtifactsDSLCodegen.kt

@@ -25,6 +25,7 @@ private fun generateAbstractKotlinArtifactsExtensionImplementation() {
         import org.jetbrains.kotlin.gradle.dsl.KotlinArtifactsExtension
         import org.jetbrains.kotlin.gradle.plugin.mpp.BitcodeEmbeddingMode
         import org.jetbrains.kotlin.gradle.plugin.mpp.NativeBuildType
+        import org.jetbrains.kotlin.konan.target.DEPRECATED_TARGET_MESSAGE
         import org.jetbrains.kotlin.konan.target.KonanTarget
         import javax.inject.Inject
     """.trimIndent()
@@ -54,15 +55,15 @@ private fun generateAbstractKotlinArtifactsExtensionImplementation() {
         "val EmbedBitcodeMode = BitcodeEmbeddingModeDsl()"
     ).joinToString("\n").indented(4)
 
-    val konanTargetConstants = KonanTarget.predefinedTargets.values.joinToString("\n") {
-        val nameParts = it.name.split("_")
-        val name = nameParts.drop(1).joinToString(
-            separator = "",
-            prefix = nameParts.first(),
-            transform = String::capitalizeUS
-        )
-        "val $name = KonanTarget.${it.name.uppercase(Locale.US)}"
-    }.indented(4)
+    val konanTargetConstants = KonanTarget.predefinedTargets.values.filter { !KonanTarget.deprecatedTargets.contains(it) }
+        .joinToString("\n") {
+            it.generateKonanTargetVal()
+        }.indented(4)
+
+    val deprecatedKonanTargetConstants = KonanTarget.predefinedTargets.values.filter { KonanTarget.deprecatedTargets.contains(it) }
+        .joinToString("\n") {
+            "\n@Deprecated(DEPRECATED_TARGET_MESSAGE)\n" + it.generateKonanTargetVal()
+        }.indented(4)
 
     val code = listOf(
         "package ${className.packageName()}",
@@ -74,9 +75,20 @@ private fun generateAbstractKotlinArtifactsExtensionImplementation() {
         bitcodeModeConstants,
         bitcodeMode,
         konanTargetConstants,
+        deprecatedKonanTargetConstants,
         "}"
     ).joinToString(separator = "\n\n")
 
     val targetFile = File("$outputSourceRoot/${className.fqName.replace(".", "/")}.kt")
     targetFile.writeText(code)
+}
+
+private fun KonanTarget.generateKonanTargetVal(): String {
+    val nameParts = this.name.split("_")
+    val name = nameParts.drop(1).joinToString(
+        separator = "",
+        prefix = nameParts.first(),
+        transform = String::capitalizeUS
+    )
+    return "val $name = KonanTarget.${this.name.uppercase(Locale.US)}"
 }

libraries/tools/kotlin-gradle-plugin-dsl-codegen/src/main/kotlin/org/jetbrains/kotlin/generators/gradle/dsl/mppPresetFunctionsCodegen.kt

@@ -19,8 +19,10 @@ private val presetsProperty = KotlinTargetsContainerWithPresets::presets.name
 
 private fun generateKotlinTargetContainerWithPresetFunctionsInterface() {
     // Generate KotlinMultiplatformExtension subclass with member functions for the presets:
-    val functions = allPresetEntries.map {
-        generatePresetFunctions(it, presetsProperty, "configureOrCreate")
+    val functions = allPresetEntries.map { kotlinPreset ->
+        // magic indent is needed to make the result look pretty
+        val funPrefix = kotlinPreset.deprecation?.let { "\n    $it\n    @Suppress(\"DEPRECATION\")\n    " } ?: ""
+        generatePresetFunctions(kotlinPreset, presetsProperty, "configureOrCreate", funPrefix)
     }
 
     val parentInterfaceName =
@@ -29,9 +31,12 @@ private fun generateKotlinTargetContainerWithPresetFunctionsInterface() {
     val className =
         typeName("org.jetbrains.kotlin.gradle.dsl.KotlinTargetContainerWithPresetFunctions")
 
+    val deprecatedMessageVal = typeName("org.jetbrains.kotlin.konan.target.DEPRECATED_TARGET_MESSAGE")
+
     val imports = allPresetEntries
         .flatMap { it.typeNames() }
         .plus(parentInterfaceName)
+        .plus(deprecatedMessageVal)
         .plus(typeName(Action::class.java.canonicalName))
         .filter { it.packageName() != className.packageName() }
         .flatMap { it.collectFqNames() }
@@ -56,11 +61,12 @@ private fun generateKotlinTargetContainerWithPresetFunctionsInterface() {
 private fun generatePresetFunctions(
     presetEntry: KotlinPresetEntry,
     getPresetsExpression: String,
-    configureOrCreateFunctionName: String
+    configureOrCreateFunctionName: String,
+    funPrefix: String = ""
 ): String {
     val presetName = presetEntry.presetName
     return """
-    fun $presetName(
+    ${funPrefix}fun $presetName(
         name: String = "$presetName",
         configure: ${presetEntry.targetType.renderShort()}.() -> Unit = { }
     ): ${presetEntry.targetType.renderShort()} =
@@ -70,9 +76,9 @@ private fun generatePresetFunctions(
             configure
         )
 
-    fun $presetName() = $presetName("$presetName") { }
-    fun $presetName(name: String) = $presetName(name) { }
-    fun $presetName(name: String, configure: Action<${presetEntry.targetType.renderShort()}>) = $presetName(name) { configure.execute(this) }
-    fun $presetName(configure: Action<${presetEntry.targetType.renderShort()}>) = $presetName { configure.execute(this) }
+    ${funPrefix}fun $presetName() = $presetName("$presetName") { }
+    ${funPrefix}fun $presetName(name: String) = $presetName(name) { }
+    ${funPrefix}fun $presetName(name: String, configure: Action<${presetEntry.targetType.renderShort()}>) = $presetName(name) { configure.execute(this) }
+    ${funPrefix}fun $presetName(configure: Action<${presetEntry.targetType.renderShort()}>) = $presetName { configure.execute(this) }
 """.trimIndent()
 }

libraries/tools/kotlin-gradle-plugin-dsl-codegen/src/main/kotlin/org/jetbrains/kotlin/generators/gradle/dsl/presetEntries.kt

@@ -14,7 +14,8 @@ import org.jetbrains.kotlin.konan.target.presetName
 internal class KotlinPresetEntry(
     val presetName: String,
     val presetType: TypeName,
-    val targetType: TypeName
+    val targetType: TypeName,
+    val deprecation: String? = null
 )
 
 internal fun KotlinPresetEntry.typeNames(): Set<TypeName> = setOf(presetType, targetType)
@@ -74,8 +75,9 @@ internal val nativePresetEntries = HostManager().targets
             else ->
                 Presets.simple to Targets.base
         }
+        val deprecation = "@Deprecated(DEPRECATED_TARGET_MESSAGE)".takeIf { target in KonanTarget.deprecatedTargets }
 
-        KotlinPresetEntry(target.presetName, typeName(presetType), typeName(targetType))
+        KotlinPresetEntry(target.presetName, typeName(presetType), typeName(targetType), deprecation)
     }
 
 internal val allPresetEntries = listOf(