Fix toolchain does not configure project level jvm target convention

Now JDK toolchain configures project level compiler options jvm target
convention and does not override convention for task.

For use case when toolchain is configured via task DSL jvm target
convention overrides project level convention.

^KT-57393 Fixed

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/KotlinJavaToolchainTest.kt

@@ -12,6 +12,7 @@ import org.gradle.internal.jvm.Jvm
 import org.gradle.testkit.runner.BuildResult
 import org.gradle.util.GradleVersion
 import org.jetbrains.kotlin.gradle.testbase.*
+import org.jetbrains.kotlin.test.TestMetadata
 import org.junit.jupiter.api.DisplayName
 import java.io.File
 import kotlin.io.path.appendText
@@ -702,6 +703,61 @@ class KotlinJavaToolchainTest : KGPBaseTest() {
         }
     }
 
+    @DisplayName("Toolchain should not override Jvm target configured in project level DSL")
+    @TestMetadata("kotlin-java-toolchain/simple")
+    @GradleTest
+    fun toolchainNotOverrideProjectJvmTarget(gradleVersion: GradleVersion) {
+        project(
+            projectName = "simple".fullProjectName,
+            gradleVersion = gradleVersion,
+            buildOptions = defaultBuildOptions.copy(logLevel = LogLevel.DEBUG)
+        ) {
+            buildGradle.appendText(
+                //language=groovy
+                """
+                |
+                |kotlin.compilerOptions.jvmTarget.set(org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_11)
+                |
+                """.trimMargin()
+            )
+
+            build(":compileKotlin") {
+                assertTasksExecuted(":compileKotlin")
+                assertCompilerArgument(":compileKotlin", "-jvm-target 11")
+            }
+        }
+    }
+
+    @AndroidGradlePluginTests
+    @DisplayName("Toolchain should not override Jvm taget configured via kotlinOptions in android project")
+    @AndroidTestVersions(minVersion = TestVersions.AGP.AGP_42)
+    @GradleAndroidTest
+    internal fun kotlinOptionsAndroidAndToolchainNotOverrideJvmTarget(
+        gradleVersion: GradleVersion,
+        agpVersion: String,
+        providedJdk: JdkVersions.ProvidedJdk
+    ) {
+        project(
+            "android".fullProjectName,
+            gradleVersion,
+            buildOptions = defaultBuildOptions.copy(androidVersion = agpVersion, logLevel = LogLevel.DEBUG),
+            buildJdk = providedJdk.location
+        ) {
+            buildGradle.appendText(
+                //language=groovy
+                """
+                |
+                |android.kotlinOptions.jvmTarget = "11"
+                """.trimMargin()
+            )
+
+            build(":compileDebugKotlin") {
+                assertTasksExecuted(":compileDebugKotlin")
+                assertCompilerArgument(":compileDebugKotlin", "-jvm-target 11")
+            }
+        }
+    }
+
     private fun BuildResult.assertJdkHomeIsUsingJdk(
         javaexecPath: String
     ) = assertOutputContains("[KOTLIN] Kotlin compilation 'jdkHome' argument: $javaexecPath")

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

@@ -75,7 +75,7 @@ abstract class KotlinTopLevelExtension(internal val project: Project) : KotlinTo
 
     override lateinit var coreLibrariesVersion: String
 
-    private val toolchainSupport = ToolchainSupport.createToolchain(project)
+    private val toolchainSupport = ToolchainSupport.createToolchain(project, this)
 
     /**
      * Configures [Java toolchain](https://docs.gradle.org/current/userguide/toolchains.html) both for Kotlin JVM and Java tasks.

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

@@ -14,6 +14,7 @@ import org.gradle.api.tasks.TaskContainer
 import org.gradle.jvm.toolchain.JavaToolchainService
 import org.gradle.jvm.toolchain.JavaToolchainSpec
 import org.jetbrains.kotlin.gradle.tasks.DefaultKotlinJavaToolchain
+import org.jetbrains.kotlin.gradle.tasks.KotlinJvmCompile
 import org.jetbrains.kotlin.gradle.tasks.UsesKotlinJavaToolchain
 import org.jetbrains.kotlin.gradle.tasks.withType
 import org.jetbrains.kotlin.gradle.utils.newInstance
@@ -24,12 +25,14 @@ internal interface ToolchainSupport {
 
     companion object {
         internal fun createToolchain(
-            project: Project
+            project: Project,
+            kotlinExtension: KotlinTopLevelExtensionConfig
         ): ToolchainSupport {
             return project.objects.newInstance<DefaultToolchainSupport>(
                 project.extensions,
                 project.tasks,
-                project.plugins
+                project.plugins,
+                kotlinExtension
             )
         }
     }
@@ -38,7 +41,8 @@ internal interface ToolchainSupport {
 internal abstract class DefaultToolchainSupport @Inject constructor(
     private val extensions: ExtensionContainer,
     private val tasks: TaskContainer,
-    private val plugins: PluginContainer
+    private val plugins: PluginContainer,
+    private val kotlinExtension: KotlinTopLevelExtensionConfig
 ) : ToolchainSupport {
     private val toolchainSpec: JavaToolchainSpec
         get() = extensions
@@ -60,12 +64,28 @@ internal abstract class DefaultToolchainSupport @Inject constructor(
             val toolchainService = extensions.findByType(JavaToolchainService::class.java)
                 ?: error("Gradle JavaToolchainService is not available!")
             val javaLauncher = toolchainService.launcherFor(toolchainSpec)
+
             tasks
                 .withType<UsesKotlinJavaToolchain>()
                 .configureEach {
                     (it.kotlinJavaToolchain.toolchain as DefaultKotlinJavaToolchain.DefaultJavaToolchainSetter)
                         .useAsConvention(javaLauncher)
                 }
+
+            if (kotlinExtension !is KotlinJvmProjectExtension &&
+                kotlinExtension !is KotlinAndroidProjectExtension
+            ) {
+                tasks
+                    .withType<UsesKotlinJavaToolchain>()
+                    .configureEach { task ->
+                        if (task is KotlinJvmCompile) {
+                            DefaultKotlinJavaToolchain.wireJvmTargetToJvm(
+                                task.compilerOptions,
+                                (task.kotlinJavaToolchain as DefaultKotlinJavaToolchain).providedJvm
+                            )
+                        }
+                    }
+            }
         }
     }
 }

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

@@ -33,6 +33,10 @@ internal open class KotlinJvmPlugin(
         ) {
             extensionCompilerOptions.verbose.convention(logger.isDebugEnabled)
             extensionCompilerOptions.moduleName.convention(baseModuleName())
+            DefaultKotlinJavaToolchain.wireJvmTargetToToolchain(
+                extensionCompilerOptions,
+                project
+            )
             compilationsContainer.configureEach {
                 val jvmCompilerOptions = it.compilerOptions.options as KotlinJvmCompilerOptions
                 KotlinJvmCompilerOptionsHelper.syncOptionsAsConvention(

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/tasks/DefaultKotlinJavaToolchain.kt

@@ -7,15 +7,18 @@ package org.jetbrains.kotlin.gradle.tasks
 
 import org.gradle.api.GradleException
 import org.gradle.api.JavaVersion
+import org.gradle.api.Project
 import org.gradle.api.file.ProjectLayout
 import org.gradle.api.file.RegularFileProperty
 import org.gradle.api.model.ObjectFactory
+import org.gradle.api.plugins.JavaPluginExtension
 import org.gradle.api.provider.Property
 import org.gradle.api.provider.Provider
 import org.gradle.api.tasks.Internal
 import org.gradle.internal.jvm.Jvm
 import org.gradle.jvm.toolchain.*
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.dsl.KotlinJvmCompilerOptions
 import org.jetbrains.kotlin.gradle.utils.*
 import org.jetbrains.kotlin.gradle.utils.chainedFinalizeValueOnRead
 import org.jetbrains.kotlin.gradle.utils.property
@@ -27,7 +30,7 @@ import javax.inject.Inject
 internal abstract class DefaultKotlinJavaToolchain @Inject constructor(
     private val objects: ObjectFactory,
     projectLayout: ProjectLayout,
-    private val kotlinCompileTaskProvider: () -> KotlinCompile?
+    jvmCompilerOptions: () -> KotlinJvmCompilerOptions?
 ) : KotlinJavaToolchain {
 
     @get:Internal
@@ -60,27 +63,6 @@ internal abstract class DefaultKotlinJavaToolchain @Inject constructor(
         )
         .chainedFinalizeValueOnRead()
 
-    init {
-        wireJvmTargetToToolchain()
-    }
-
-    private fun wireJvmTargetToToolchain() {
-        kotlinCompileTaskProvider()?.let { task ->
-            task.compilerOptions.jvmTarget.convention(
-                providedJvm.map { jvm ->
-                    // For Java 9 and Java 10 JavaVersion returns "1.9" or "1.10" accordingly
-                    // that is not accepted by Kotlin compiler
-                    val normalizedVersion = when (jvm.javaVersion) {
-                        JavaVersion.VERSION_1_9 -> "9"
-                        JavaVersion.VERSION_1_10 -> "10"
-                        else -> jvm.javaVersion.toString()
-                    }
-                    JvmTarget.fromTarget(normalizedVersion)
-                }.orElse(JvmTarget.DEFAULT)
-            )
-        }
-    }
-
     @get:Internal
     internal val javaExecutable: RegularFileProperty = objects
         .fileProperty()
@@ -134,15 +116,20 @@ internal abstract class DefaultKotlinJavaToolchain @Inject constructor(
 
     final override val jdk: KotlinJavaToolchain.JdkSetter = DefaultJdkSetter(
         providedJvm,
-        objects
+        objects,
+        jvmCompilerOptions
     )
 
     final override val toolchain: KotlinJavaToolchain.JavaToolchainSetter =
-        DefaultJavaToolchainSetter(providedJvm)
+        DefaultJavaToolchainSetter(
+            providedJvm,
+            jvmCompilerOptions
+        )
 
     private class DefaultJdkSetter(
         private val providedJvm: Property<Jvm>,
         private val objects: ObjectFactory,
+        private val jvmCompilerOptions: () -> KotlinJvmCompilerOptions?
     ) : KotlinJavaToolchain.JdkSetter {
 
         override fun use(
@@ -161,11 +148,16 @@ internal abstract class DefaultKotlinJavaToolchain @Inject constructor(
                     Jvm.discovered(jdkHomeLocation, null, jdkVersion)
                 }
             )
+
+            jvmCompilerOptions()?.let {
+                wireJvmTargetToJvm(it, providedJvm)
+            }
         }
     }
 
     internal class DefaultJavaToolchainSetter(
-        private val providedJvm: Property<Jvm>
+        private val providedJvm: Property<Jvm>,
+        private val jvmCompilerOptions: () -> KotlinJvmCompilerOptions?
     ) : KotlinJavaToolchain.JavaToolchainSetter {
 
         internal fun useAsConvention(
@@ -178,6 +170,54 @@ internal abstract class DefaultKotlinJavaToolchain @Inject constructor(
             javaLauncher: Provider<JavaLauncher>
         ) {
             providedJvm.set(javaLauncher.map(::mapToJvm))
+
+            jvmCompilerOptions()?.let {
+                wireJvmTargetToJvm(it, providedJvm)
+            }
+        }
+    }
+
+    companion object {
+
+        internal fun wireJvmTargetToJvm(
+            jvmCompilerOptions: KotlinJvmCompilerOptions,
+            toolchainJvm: Provider<Jvm>
+        ) {
+            jvmCompilerOptions.jvmTarget.convention(
+                toolchainJvm.map { jvm ->
+                    // For Java 9 and Java 10 JavaVersion returns "1.9" or "1.10" accordingly
+                    // that is not accepted by Kotlin compiler
+                    val normalizedVersion = when (jvm.javaVersion) {
+                        JavaVersion.VERSION_1_9 -> "9"
+                        JavaVersion.VERSION_1_10 -> "10"
+                        else -> jvm.javaVersion.toString()
+                    }
+                    JvmTarget.fromTarget(normalizedVersion)
+                }.orElse(JvmTarget.DEFAULT)
+            )
+        }
+
+        private fun wireJvmTargetToToolchain(
+            jvmCompilerOptions: KotlinJvmCompilerOptions,
+            javaLauncher: Provider<JavaLauncher>
+        ): Unit = wireJvmTargetToJvm(
+            jvmCompilerOptions,
+            javaLauncher.map(::mapToJvm)
+        )
+
+        internal fun wireJvmTargetToToolchain(
+            compilerOptions: KotlinJvmCompilerOptions,
+            project: Project,
+        ) {
+            project.plugins.withId("org.gradle.java-base") {
+                val toolchainService = project.extensions.findByType(JavaToolchainService::class.java)
+                    ?: error("Gradle JavaToolchainService is not available!")
+                val toolchainSpec = project.extensions
+                    .getByType(JavaPluginExtension::class.java)
+                    .toolchain
+                val javaLauncher = toolchainService.launcherFor(toolchainSpec)
+                wireJvmTargetToToolchain(compilerOptions, javaLauncher)
+            }
         }
 
         private fun mapToJvm(javaLauncher: JavaLauncher): Jvm {

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/tasks/KotlinCompile.kt

@@ -144,7 +144,7 @@ abstract class KotlinCompile @Inject constructor(
 
     @get:Internal
     final override val defaultKotlinJavaToolchain: Provider<DefaultKotlinJavaToolchain> = objectFactory
-        .propertyWithNewInstance({ this })
+        .propertyWithNewInstance({ compilerOptions })
 
     final override val kotlinJavaToolchainProvider: Provider<KotlinJavaToolchain> = defaultKotlinJavaToolchain.cast()