[Gradle] Introduce compilerOptions for Kotlin metadata target

KotlinMetadataTarget now exposes experimental compiler options DSL that
are passed as a convention into target compilations compiler options.

^KT-57292 In Progress

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

@@ -6,7 +6,9 @@
 package org.jetbrains.kotlin.gradle.plugin.mpp
 
 import org.jetbrains.kotlin.gradle.plugin.KotlinSourceSet
+import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.*
 import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.DefaultKotlinCompilationFriendPathsResolver
+import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.DefaultKotlinCompilationPostConfigure
 import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.KotlinCompilationSourceSetInclusion
 import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.KotlinCompilationSourceSetsContainer
 import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.factory.DefaultKotlinCompilationDependencyConfigurationsFactory
@@ -43,7 +45,11 @@ class KotlinCommonCompilationFactory internal constructor(
             Metadata compilations are created *because* of a pre-existing SourceSet.
             We therefore can create the container inline
             */
-            compilationSourceSetsContainerFactory = { _, _ -> KotlinCompilationSourceSetsContainer(defaultSourceSet) }
+            compilationSourceSetsContainerFactory = { _, _ -> KotlinCompilationSourceSetsContainer(defaultSourceSet) },
+            postConfigureAction = KotlinCompilationImplFactory.PostConfigure.composite(
+                DefaultKotlinCompilationPostConfigure,
+                KotlinCompilationCommonCompilerOptionsFromTargetConfigurator(target.compilerOptions)
+            )
         )
 
     override fun create(name: String): KotlinCommonCompilation = target.project.objects.newInstance(

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

@@ -5,12 +5,17 @@
 
 package org.jetbrains.kotlin.gradle.plugin.mpp
 
+import org.gradle.api.Action
 import org.gradle.api.Project
+import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
+import org.jetbrains.kotlin.gradle.dsl.KotlinCommonCompilerOptions
+import org.jetbrains.kotlin.gradle.dsl.KotlinCommonCompilerOptionsDefault
 import org.jetbrains.kotlin.gradle.plugin.KotlinCompilation
 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.newInstance
 import javax.inject.Inject
 
 abstract class KotlinMetadataTarget @Inject constructor(
@@ -30,7 +35,21 @@ abstract class KotlinMetadataTarget @Inject constructor(
         Metadata Target does not have a KotlinTargetComponent on it's own.
         Responsibility is shifted to the root KotlinSoftwareComponent
         */
-        emptySet<KotlinTargetComponent>()
+        emptySet()
+    }
+
+    @ExperimentalKotlinGradlePluginApi
+    override val compilerOptions: KotlinCommonCompilerOptions = project.objects
+        .newInstance<KotlinCommonCompilerOptionsDefault>()
+
+    @ExperimentalKotlinGradlePluginApi
+    fun compilerOptions(configure: KotlinCommonCompilerOptions.() -> Unit) {
+        configure(compilerOptions)
+    }
+
+    @ExperimentalKotlinGradlePluginApi
+    fun compilerOptions(configure: Action<KotlinCommonCompilerOptions>) {
+        configure.execute(compilerOptions)
     }
 }
 

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

@@ -68,3 +68,15 @@ internal class KotlinCompilationJsCompilerOptionsFromTargetConfigurator(
         )
     }
 }
+
+internal class KotlinCompilationCommonCompilerOptionsFromTargetConfigurator(
+    private val targetCompilerOptions: KotlinCommonCompilerOptions
+) : KotlinCompilationImplFactory.PostConfigure {
+    override fun configure(compilation: DecoratedKotlinCompilation<*>) {
+        val commonCompilerOptions = compilation.compilerOptions.options
+        KotlinCommonCompilerOptionsHelper.syncOptionsAsConvention(
+            targetCompilerOptions,
+            commonCompilerOptions
+        )
+    }
+}

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

@@ -7,6 +7,7 @@
 package org.jetbrains.kotlin.gradle.plugin.mpp
 
 import org.jetbrains.kotlin.gradle.plugin.KotlinSourceSet
+import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.*
 import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.DefaultKotlinCompilationFriendPathsResolver
 import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.KotlinCompilationSourceSetInclusion
 import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.KotlinCompilationSourceSetsContainer
@@ -17,7 +18,7 @@ import org.jetbrains.kotlin.gradle.plugin.mpp.compilationImpl.factory.KotlinNati
 import org.jetbrains.kotlin.konan.target.KonanTarget
 
 open class KotlinSharedNativeCompilationFactory internal constructor(
-    override val target: KotlinMetadataTarget,
+    final override val target: KotlinMetadataTarget,
     private val konanTargets: Set<KonanTarget>,
     private val defaultSourceSet: KotlinSourceSet
 ) : KotlinCompilationFactory<KotlinSharedNativeCompilation> {
@@ -51,10 +52,13 @@ open class KotlinSharedNativeCompilationFactory internal constructor(
             Metadata compilations are created *because* of a pre-existing SourceSet.
             We therefore can create the container inline
              */
-            compilationSourceSetsContainerFactory = { _, _ -> KotlinCompilationSourceSetsContainer(defaultSourceSet) }
+            compilationSourceSetsContainerFactory = { _, _ -> KotlinCompilationSourceSetsContainer(defaultSourceSet) },
+            postConfigureAction = KotlinCompilationImplFactory.PostConfigure.composite(
+                DefaultKotlinCompilationPostConfigure,
+                KotlinCompilationCommonCompilerOptionsFromTargetConfigurator(target.compilerOptions)
+            )
         )
 
-    @Suppress("DEPRECATION")
     override fun create(name: String): KotlinSharedNativeCompilation {
         return target.project.objects.newInstance(
             itemClass, konanTargets.toList(), compilationImplFactory.create(target, name)

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

@@ -6,9 +6,11 @@
 package org.jetbrains.kotlin.gradle.unitTests
 
 import org.gradle.api.Project
+import org.jetbrains.kotlin.gradle.dsl.KotlinCommonCompilerOptions
 import org.jetbrains.kotlin.gradle.dsl.KotlinJsCompilerOptions
 import org.jetbrains.kotlin.gradle.dsl.KotlinNativeCompilerOptions
 import org.jetbrains.kotlin.gradle.dsl.multiplatformExtension
+import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinMetadataTarget
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompilationTask
 import org.jetbrains.kotlin.gradle.tasks.withType
 import org.jetbrains.kotlin.gradle.util.buildProjectWithMPP
@@ -120,6 +122,58 @@ class ProjectCompilerOptionsTests {
         assertEquals(false, project.kotlinJsTask("compileKotlinJs").compilerOptions.suppressWarnings.get())
     }
 
+    @Test
+    fun metadataTargetDsl() {
+        val project = buildProjectWithMPP {
+            with(multiplatformExtension) {
+                linuxX64()
+                iosX64()
+                iosArm64()
+
+                targets.named("metadata", KotlinMetadataTarget::class.java) {
+                    it.compilerOptions {
+                        progressiveMode.set(true)
+                    }
+                }
+
+                applyDefaultHierarchyTemplate()
+            }
+        }
+
+        project.evaluate()
+
+        assertEquals(true, project.kotlinCommonTask("compileKotlinMetadata").compilerOptions.progressiveMode.get())
+    }
+
+    @Test
+    fun metadataTaskOptionsOverrideTargetOptions() {
+        val project = buildProjectWithMPP {
+            tasks.withType<KotlinCompilationTask<*>>().configureEach {
+                if (it.name == "compileKotlinMetadata") {
+                    it.compilerOptions.progressiveMode.set(false)
+                }
+            }
+
+            with(multiplatformExtension) {
+                linuxX64()
+                iosX64()
+                iosArm64()
+
+                targets.named("metadata", KotlinMetadataTarget::class.java) {
+                    it.compilerOptions {
+                        progressiveMode.set(true)
+                    }
+                }
+
+                applyDefaultHierarchyTemplate()
+            }
+        }
+
+        project.evaluate()
+
+        assertEquals(false, project.kotlinCommonTask("compileKotlinMetadata").compilerOptions.progressiveMode.get())
+    }
+
     private fun Project.kotlinNativeTask(name: String): KotlinCompilationTask<KotlinNativeCompilerOptions> = tasks
         .named<KotlinCompilationTask<KotlinNativeCompilerOptions>>(name)
         .get()
@@ -127,4 +181,8 @@ class ProjectCompilerOptionsTests {
     private fun Project.kotlinJsTask(name: String): KotlinCompilationTask<KotlinJsCompilerOptions> = tasks
         .named<KotlinCompilationTask<KotlinJsCompilerOptions>>(name)
         .get()
+
+    private fun Project.kotlinCommonTask(name: String): KotlinCompilationTask<KotlinCommonCompilerOptions> = tasks
+        .named<KotlinCompilationTask<KotlinCommonCompilerOptions>>(name)
+        .get()
 }