gradle/generation/extract-jdk-apis.gradle

/*
 * 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.
 */

def resources = scriptResources(buildscript)

configure(project(":lucene:core")) {
  ext {
    apijars = layout.projectDirectory.dir("src/generated/jdk")
    mrjarJavaVersions = [ 21 ]
  }
  
  configurations {
    apiextractor
  }

  dependencies {
    apiextractor deps.asm.core
  }

  plugins.withType(JavaPlugin) {
    mrjarJavaVersions.each { jdkVersion ->
      def task = tasks.create(name: "generateJdkApiJar${jdkVersion}", type: JavaExec) {
        description "Regenerate the API-only JAR file with public Panama Foreign & Vector API from JDK ${jdkVersion}"
        group "generation"

        javaLauncher = javaToolchains.launcherFor {
          languageVersion = JavaLanguageVersion.of(jdkVersion)
        }

        onlyIf {
          try {
            javaLauncher.get()
            return true
          } catch (Exception e) {
            logger.warn('Launcher for Java {} is not available; skipping regeneration of Panama Foreign & Vector API JAR.', jdkVersion)
            logger.warn('Error: {}', e.cause?.message)
            logger.warn("Please make sure to point env 'JAVA{}_HOME' to exactly JDK version {} or enable Gradle toolchain auto-download.", jdkVersion, jdkVersion)
            return false
          }
        }

        classpath = configurations.apiextractor
        mainClass = file("${resources}/ExtractJdkApis.java") as String
        systemProperties = [
                'user.timezone': 'UTC',
                'file.encoding': 'UTF-8',
        ]
        args = [
                jdkVersion,
                apijars.file("jdk${jdkVersion}.apijar"),
        ]
      }

      regenerate.dependsOn task
    }
  }
}