build-logic/basics/src/main/kotlin/configureToolchain.kt

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to you under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import org.gradle.api.provider.Provider
import org.gradle.jvm.toolchain.JavaLanguageVersion
import org.gradle.jvm.toolchain.JavaLauncher
import org.gradle.jvm.toolchain.JavaToolchainService
import org.gradle.jvm.toolchain.JavaToolchainSpec
import org.gradle.jvm.toolchain.JvmImplementation
import org.gradle.jvm.toolchain.JvmVendorSpec

fun JavaToolchainService.launcherFor(jdk: ToolchainProperties): Provider<JavaLauncher> = launcherFor {
    configureToolchain(jdk)
}

fun JavaToolchainSpec.configureToolchain(jdk: ToolchainProperties?) {
    if (jdk == null) {
        return
    }
    languageVersion.set(JavaLanguageVersion.of(jdk.version))
    jdk.vendor?.let {
        vendor.set(JvmVendorSpec.matching(it))
    }
    if (jdk.implementation.equals("J9", ignoreCase = true)) {
        implementation.set(JvmImplementation.J9)
    }
}