[Gradle] Add multiplatform extension compiler options DSL

Now the multiplatform extension exposes compiler option DSL for common
compiler arguments. This compiler option synced as a convention for
targets compiler option.

In the case of Kotlin source sets which are not used as defaultSourceSet
 in compilations - extension compiler options are synced as convention
 into those.

^KT-57292 In Progress

libraries/tools/kotlin-gradle-plugin/api/kotlin-gradle-plugin.api

@@ -34,6 +34,8 @@ public abstract class org/jetbrains/kotlin/gradle/dsl/KotlinMultiplatformExtensi
 	public fun applyHierarchyTemplate (Lkotlin/jvm/functions/Function1;)V
 	public fun applyHierarchyTemplate (Lorg/jetbrains/kotlin/gradle/plugin/KotlinHierarchyTemplate;)V
 	public fun applyHierarchyTemplate (Lorg/jetbrains/kotlin/gradle/plugin/KotlinHierarchyTemplate;Lkotlin/jvm/functions/Function1;)V
+	public final fun compilerOptions (Lkotlin/jvm/functions/Function1;)V
+	public final fun compilerOptions (Lorg/gradle/api/Action;)V
 	public fun dependencies (Lorg/gradle/api/NamedDomainObjectProvider;Lkotlin/jvm/functions/Function1;)V
 	public fun getAndroidMain (Lorg/gradle/api/NamedDomainObjectContainer;)Lorg/gradle/api/NamedDomainObjectProvider;
 	public fun getAndroidNativeMain (Lorg/gradle/api/NamedDomainObjectContainer;)Lorg/gradle/api/NamedDomainObjectProvider;
@@ -43,6 +45,7 @@ public abstract class org/jetbrains/kotlin/gradle/dsl/KotlinMultiplatformExtensi
 	public fun getBOTH ()Lorg/jetbrains/kotlin/gradle/plugin/KotlinJsCompilerType;
 	public fun getCommonMain (Lorg/gradle/api/NamedDomainObjectContainer;)Lorg/gradle/api/NamedDomainObjectProvider;
 	public fun getCommonTest (Lorg/gradle/api/NamedDomainObjectContainer;)Lorg/gradle/api/NamedDomainObjectProvider;
+	public final fun getCompilerOptions ()Lorg/jetbrains/kotlin/gradle/dsl/KotlinCommonCompilerOptions;
 	public fun getCompilerTypeFromProperties ()Lorg/jetbrains/kotlin/gradle/plugin/KotlinJsCompilerType;
 	public fun getDefaultJsCompilerType ()Lorg/jetbrains/kotlin/gradle/plugin/KotlinJsCompilerType;
 	public fun getIR ()Lorg/jetbrains/kotlin/gradle/plugin/KotlinJsCompilerType;

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinMultiplatformExtension.kt

@@ -13,6 +13,7 @@ import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
 import org.jetbrains.kotlin.gradle.InternalKotlinGradlePluginApi
 import org.jetbrains.kotlin.gradle.PRESETS_API_IS_DEPRECATED_MESSAGE
 import org.jetbrains.kotlin.gradle.DeprecatedTargetPresetApi
+import org.jetbrains.kotlin.gradle.internal.syncCommonOptions
 import org.jetbrains.kotlin.gradle.plugin.*
 import org.jetbrains.kotlin.gradle.plugin.KotlinPluginLifecycle.Stage.AfterFinaliseDsl
 import org.jetbrains.kotlin.gradle.plugin.diagnostics.KotlinToolingDiagnostics
@@ -22,6 +23,8 @@ import org.jetbrains.kotlin.gradle.plugin.hierarchy.KotlinHierarchyDslImpl
 import org.jetbrains.kotlin.gradle.plugin.mpp.*
 import org.jetbrains.kotlin.gradle.targets.android.internal.InternalKotlinTargetPreset
 import org.jetbrains.kotlin.gradle.targets.android.internal.internal
+import org.jetbrains.kotlin.gradle.utils.configureExperimentalTryK2
+import org.jetbrains.kotlin.gradle.utils.newInstance
 import javax.inject.Inject
 
 @Suppress("DEPRECATION")
@@ -239,6 +242,24 @@ abstract class KotlinMultiplatformExtension
     internal val rootSoftwareComponent: KotlinSoftwareComponent by lazy {
         KotlinSoftwareComponentWithCoordinatesAndPublication(project, "kotlin", targets)
     }
+
+    @ExperimentalKotlinGradlePluginApi
+    val compilerOptions: KotlinCommonCompilerOptions = project.objects
+        .newInstance<KotlinCommonCompilerOptionsDefault>()
+        .configureExperimentalTryK2(project)
+        .also {
+            syncCommonOptions(it)
+        }
+
+    @ExperimentalKotlinGradlePluginApi
+    fun compilerOptions(configure: KotlinCommonCompilerOptions.() -> Unit) {
+        configure(compilerOptions)
+    }
+
+    @ExperimentalKotlinGradlePluginApi
+    fun compilerOptions(configure: Action<KotlinCommonCompilerOptions>) {
+        configure.execute(compilerOptions)
+    }
 }
 
 @DeprecatedTargetPresetApi

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/internal/compilerOptionsDslHelpers.kt

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.gradle.internal
+
+import org.jetbrains.kotlin.gradle.dsl.KotlinCommonCompilerOptions
+import org.jetbrains.kotlin.gradle.dsl.KotlinCommonCompilerOptionsDefault
+import org.jetbrains.kotlin.gradle.dsl.KotlinCommonCompilerOptionsHelper
+import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
+import org.jetbrains.kotlin.gradle.plugin.KotlinPluginLifecycle
+import org.jetbrains.kotlin.gradle.plugin.await
+import org.jetbrains.kotlin.gradle.plugin.launch
+import org.jetbrains.kotlin.gradle.plugin.sources.DefaultLanguageSettingsBuilder
+import org.jetbrains.kotlin.gradle.utils.newInstance
+
+internal fun KotlinMultiplatformExtension.syncCommonOptions(
+    extensionCompilerOptions: KotlinCommonCompilerOptions
+) {
+    targets.configureEach { target ->
+        KotlinCommonCompilerOptionsHelper.syncOptionsAsConvention(
+            extensionCompilerOptions,
+            target.compilerOptions
+        )
+    }
+
+    project.launch {
+        awaitSourceSets().configureEach { kotlinSourceSet ->
+            val defaultLanguageSettings = kotlinSourceSet.languageSettings as DefaultLanguageSettingsBuilder
+            launch {
+                KotlinPluginLifecycle.Stage.AfterFinaliseCompilations.await()
+                if (!defaultLanguageSettings.compilationCompilerOptions.isCompleted) {
+                    // For shared source sets without any associated compilation, it would be a separate instance of common compiler options
+                    val compilerOptions = project.objects.newInstance<KotlinCommonCompilerOptionsDefault>()
+                    KotlinCommonCompilerOptionsHelper.syncOptionsAsConvention(
+                        extensionCompilerOptions,
+                        compilerOptions
+                    )
+                    defaultLanguageSettings.compilationCompilerOptions.complete(compilerOptions)
+                }
+            }
+        }
+    }
+}

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/KotlinMetadataTarget.kt

@@ -15,7 +15,6 @@ import org.jetbrains.kotlin.gradle.plugin.KotlinPlatformType
 import org.jetbrains.kotlin.gradle.plugin.KotlinTargetComponent
 import org.jetbrains.kotlin.gradle.targets.metadata.KotlinMetadataTargetConfigurator
 import org.jetbrains.kotlin.gradle.targets.metadata.isKotlinGranularMetadataEnabled
-import org.jetbrains.kotlin.gradle.utils.configureExperimentalTryK2
 import org.jetbrains.kotlin.gradle.utils.newInstance
 import javax.inject.Inject
 
@@ -42,7 +41,6 @@ abstract class KotlinMetadataTarget @Inject constructor(
     @ExperimentalKotlinGradlePluginApi
     override val compilerOptions: KotlinCommonCompilerOptions = project.objects
         .newInstance<KotlinCommonCompilerOptionsDefault>()
-        .configureExperimentalTryK2(project)
 
     @ExperimentalKotlinGradlePluginApi
     fun compilerOptions(configure: KotlinCommonCompilerOptions.() -> Unit) {

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/external/createExternalKotlinTarget.kt

@@ -23,7 +23,6 @@ import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinUsages
 import org.jetbrains.kotlin.gradle.plugin.mpp.configureSourcesPublicationAttributes
 import org.jetbrains.kotlin.gradle.plugin.usesPlatformOf
 import org.jetbrains.kotlin.gradle.tasks.locateOrRegisterTask
-import org.jetbrains.kotlin.gradle.utils.*
 import org.jetbrains.kotlin.gradle.utils.lowerCamelCaseName
 import org.jetbrains.kotlin.gradle.utils.markConsumable
 import org.jetbrains.kotlin.gradle.utils.named
@@ -68,7 +67,7 @@ fun <T : DecoratedExternalKotlinTarget> KotlinMultiplatformExtension.createExter
         KotlinPlatformType.js -> project.objects.newInstance<KotlinJsCompilerOptionsDefault>()
         KotlinPlatformType.common -> project.objects.newInstance<KotlinCommonCompilerOptionsDefault>()
         KotlinPlatformType.native -> project.objects.newInstance<KotlinNativeCompilerOptionsDefault>()
-    }.configureExperimentalTryK2(project)
+    }
 
     val target = ExternalKotlinTargetImpl(
         project = project,

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/plugin/sources/DefaultLanguageSettingsBuilder.kt

@@ -9,7 +9,6 @@ import org.gradle.api.Project
 import org.gradle.api.file.FileCollection
 import org.gradle.api.provider.Provider
 import org.jetbrains.kotlin.gradle.dsl.KotlinCommonCompilerOptions
-import org.jetbrains.kotlin.gradle.dsl.KotlinCommonCompilerOptionsDefault
 import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
 import org.jetbrains.kotlin.gradle.plugin.*
 import org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompile
@@ -22,17 +21,7 @@ import javax.inject.Inject
 internal open class DefaultLanguageSettingsBuilder @Inject constructor(
     @Transient private val project: Project
 ) : LanguageSettingsBuilder {
-    internal var compilationCompilerOptions: CompletableFuture<KotlinCommonCompilerOptions> = CompletableFuture()
+    internal val compilationCompilerOptions: CompletableFuture<KotlinCommonCompilerOptions> = CompletableFuture()
-
-    init {
-        project.launch {
-            KotlinPluginLifecycle.Stage.AfterFinaliseCompilations.await()
-            if (!compilationCompilerOptions.isCompleted) {
-                // For shared source sets without any associated compilation, it would be a separate instance of common compiler options
-                compilationCompilerOptions.complete(project.objects.newInstance<KotlinCommonCompilerOptionsDefault>())
-            }
-        }
-    }
 
     override var languageVersion: String? = null
         get() = if (compilationCompilerOptions.isCompleted) {

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

@@ -335,7 +335,6 @@ abstract class KotlinAndroidTarget @Inject constructor(
     @ExperimentalKotlinGradlePluginApi
     override val compilerOptions: KotlinJvmCompilerOptions = project.objects
         .newInstance<KotlinJvmCompilerOptionsDefault>()
-        .configureExperimentalTryK2(project)
 
     @ExperimentalKotlinGradlePluginApi
     fun compilerOptions(configure: KotlinJvmCompilerOptions.() -> Unit) {

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/KotlinJsTarget.kt

@@ -29,7 +29,6 @@ import org.jetbrains.kotlin.gradle.tasks.locateOrRegisterTask
 import org.jetbrains.kotlin.gradle.tasks.locateTask
 import org.jetbrains.kotlin.gradle.testing.internal.KotlinTestReport
 import org.jetbrains.kotlin.gradle.testing.testTaskName
-import org.jetbrains.kotlin.gradle.utils.*
 import org.jetbrains.kotlin.gradle.utils.dashSeparatedName
 import org.jetbrains.kotlin.gradle.utils.lowerCamelCaseName
 import org.jetbrains.kotlin.gradle.utils.newInstance
@@ -254,5 +253,4 @@ constructor(
     override val compilerOptions: KotlinJsCompilerOptions =
         project.objects
             .newInstance<KotlinJsCompilerOptionsDefault>()
-            .configureExperimentalTryK2(project)
 }

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/ir/KotlinJsIrTarget.kt

@@ -33,7 +33,6 @@ import org.jetbrains.kotlin.gradle.targets.js.npm.npmProject
 import org.jetbrains.kotlin.gradle.targets.js.typescript.TypeScriptValidationTask
 import org.jetbrains.kotlin.gradle.tasks.locateOrRegisterTask
 import org.jetbrains.kotlin.gradle.tasks.registerTask
-import org.jetbrains.kotlin.gradle.utils.*
 import org.jetbrains.kotlin.gradle.utils.dashSeparatedName
 import org.jetbrains.kotlin.gradle.utils.decamelize
 import org.jetbrains.kotlin.gradle.utils.lowerCamelCaseName
@@ -399,7 +398,6 @@ constructor(
     @ExperimentalKotlinGradlePluginApi
     override val compilerOptions: KotlinJsCompilerOptions = project.objects
         .newInstance<KotlinJsCompilerOptionsDefault>()
-        .configureExperimentalTryK2(project)
         .apply {
             configureJsDefaultOptions()
 

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/jvm/KotlinJvmTarget.kt

@@ -338,7 +338,6 @@ abstract class KotlinJvmTarget @Inject constructor(
     @ExperimentalKotlinGradlePluginApi
     override val compilerOptions: KotlinJvmCompilerOptions = project.objects
         .newInstance<KotlinJvmCompilerOptionsDefault>()
-        .configureExperimentalTryK2(project)
 
     @ExperimentalKotlinGradlePluginApi
     fun compilerOptions(configure: KotlinJvmCompilerOptions.() -> Unit) {

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/jvm/KotlinWithJavaTarget.kt

@@ -9,7 +9,6 @@ package org.jetbrains.kotlin.gradle.plugin.mpp
 import org.gradle.api.Action
 import org.gradle.api.NamedDomainObjectContainer
 import org.gradle.api.Project
-import org.gradle.api.artifacts.Dependency
 import org.gradle.api.file.Directory
 import org.gradle.api.plugins.JavaPlugin
 import org.gradle.api.provider.Provider
@@ -22,7 +21,6 @@ import org.jetbrains.kotlin.gradle.plugin.KotlinPlatformType
 import org.jetbrains.kotlin.gradle.plugin.internal.JavaSourceSetsAccessor
 import org.jetbrains.kotlin.gradle.plugin.variantImplementationFactory
 import org.jetbrains.kotlin.gradle.tasks.KOTLIN_BUILD_DIR_NAME
-import org.jetbrains.kotlin.gradle.utils.configureExperimentalTryK2
 import org.jetbrains.kotlin.gradle.utils.newInstance
 import java.io.File
 import javax.inject.Inject
@@ -66,7 +64,6 @@ abstract class KotlinWithJavaTarget<KotlinOptionsType : KotlinCommonOptions, CO
     @ExperimentalKotlinGradlePluginApi
     override val compilerOptions: KotlinJvmCompilerOptions = project.objects
         .newInstance<KotlinJvmCompilerOptionsDefault>()
-        .configureExperimentalTryK2(project)
 
     @ExperimentalKotlinGradlePluginApi
     fun compilerOptions(configure: KotlinJvmCompilerOptions.() -> Unit) {

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/KotlinNativeTarget.kt

@@ -26,7 +26,6 @@ import org.jetbrains.kotlin.gradle.targets.native.KotlinNativeSimulatorTestRun
 import org.jetbrains.kotlin.gradle.targets.native.NativeBinaryTestRunSource
 import org.jetbrains.kotlin.gradle.targets.native.internal.includeCommonizedCInteropMetadata
 import org.jetbrains.kotlin.gradle.tasks.locateOrRegisterTask
-import org.jetbrains.kotlin.gradle.utils.configureExperimentalTryK2
 import org.jetbrains.kotlin.gradle.utils.dashSeparatedName
 import org.jetbrains.kotlin.gradle.utils.klibModuleName
 import org.jetbrains.kotlin.gradle.utils.newInstance
@@ -140,7 +139,6 @@ abstract class KotlinNativeTarget @Inject constructor(
     @ExperimentalKotlinGradlePluginApi
     override val compilerOptions: KotlinNativeCompilerOptions = project.objects
         .newInstance<KotlinNativeCompilerOptionsDefault>()
-        .configureExperimentalTryK2(project)
         .apply {
             moduleName.convention(
                 project.klibModuleName(

libraries/tools/kotlin-gradle-plugin/src/functionalTest/kotlin/org/jetbrains/kotlin/gradle/unitTests/ProjectCompilerOptionsTests.kt

@@ -219,6 +219,95 @@ class ProjectCompilerOptionsTests {
         assertEquals(true, project.kotlinJvmTask("compileTestKotlinFake").compilerOptions.javaParameters.get())
     }
 
+    @Test
+    fun topLevelOptions() {
+        val project = buildProjectWithMPP()
+        project.runLifecycleAwareTest {
+            with(multiplatformExtension) {
+                compilerOptions {
+                    progressiveMode.set(true)
+                }
+
+                jvm()
+                js()
+                iosArm64()
+                linuxX64()
+            }
+        }
+
+        assertEquals(true, project.kotlinCommonTask("compileKotlinMetadata").compilerOptions.progressiveMode.get())
+        assertEquals(true, project.kotlinCommonTask("compileNativeMainKotlinMetadata").compilerOptions.progressiveMode.get())
+        assertEquals(true, project.kotlinCommonTask("compileCommonMainKotlinMetadata").compilerOptions.progressiveMode.get())
+        assertEquals(true, project.kotlinJvmTask("compileKotlinJvm").compilerOptions.progressiveMode.get())
+        assertEquals(true, project.kotlinJvmTask("compileTestKotlinJvm").compilerOptions.progressiveMode.get())
+        assertEquals(true, project.kotlinJsTask("compileKotlinJs").compilerOptions.progressiveMode.get())
+        assertEquals(true, project.kotlinJsTask("compileTestKotlinJs").compilerOptions.progressiveMode.get())
+        assertEquals(true, project.kotlinNativeTask("compileKotlinLinuxX64").compilerOptions.progressiveMode.get())
+        assertEquals(true, project.kotlinNativeTask("compileTestKotlinLinuxX64").compilerOptions.progressiveMode.get())
+        assertEquals(true, project.kotlinNativeTask("compileKotlinIosArm64").compilerOptions.progressiveMode.get())
+        assertEquals(true, project.kotlinNativeTask("compileTestKotlinIosArm64").compilerOptions.progressiveMode.get())
+    }
+
+    @Test
+    fun testTargetDslOverridesTopLevelDsl() {
+        val project = buildProjectWithMPP()
+        project.runLifecycleAwareTest {
+            with(multiplatformExtension) {
+                jvm {
+                    compilerOptions {
+                        languageVersion.set(KotlinVersion.KOTLIN_1_8)
+                    }
+                }
+
+                compilerOptions {
+                    languageVersion.set(KotlinVersion.KOTLIN_2_0)
+                }
+            }
+        }
+
+        assertEquals(KotlinVersion.KOTLIN_1_8, project.kotlinJvmTask("compileKotlinJvm").compilerOptions.languageVersion.orNull)
+        assertEquals(KotlinVersion.KOTLIN_1_8, project.kotlinJvmTask("compileTestKotlinJvm").compilerOptions.languageVersion.orNull)
+    }
+
+    @Test
+    fun testTaskDslOverrideTopLevelDsl() {
+        val project = buildProjectWithMPP()
+        project.runLifecycleAwareTest {
+            tasks.withType<KotlinJvmCompileTask>().configureEach {
+                if (it.name == "compileKotlinJvm") {
+                    it.compilerOptions.languageVersion.set(KotlinVersion.KOTLIN_1_8)
+                }
+            }
+
+            with(multiplatformExtension) {
+                jvm()
+
+                compilerOptions {
+                    languageVersion.set(KotlinVersion.KOTLIN_2_0)
+                }
+            }
+        }
+
+        assertEquals(KotlinVersion.KOTLIN_1_8, project.kotlinJvmTask("compileKotlinJvm").compilerOptions.languageVersion.orNull)
+    }
+
+    @Test
+    fun testTopLevelDslAlsoConfiguresSharedSourceSets() {
+        val project = buildProjectWithMPP()
+        project.runLifecycleAwareTest {
+            with(multiplatformExtension) {
+                jvm()
+                js()
+
+                compilerOptions {
+                    languageVersion.set(KotlinVersion.KOTLIN_2_0)
+                }
+            }
+        }
+
+        assertEquals("2.0", project.multiplatformExtension.sourceSets.getByName("commonTest").languageSettings.languageVersion)
+    }
+
     private fun Project.kotlinNativeTask(name: String): KotlinCompilationTask<KotlinNativeCompilerOptions> = tasks
         .named<KotlinCompilationTask<KotlinNativeCompilerOptions>>(name)
         .get()