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Use JLink to produce JREs for Windows, Linux and OSX
- Adoptium / Eclipse Temurin no longer produces JREs, unfortunately adoptium/temurin-build#2683 This means we need to download a JDK and produce a JRE for each platform - They recommend you use JLink to produce your own JREs https://blog.adoptium.net/2021/10/jlink-to-produce-own-runtime/ - It seems possible to do this cross-platform, use the Gradle Toolchain JVM with a JDK for target platform to produce JRE for target platform - This currently includes all modules and can be cut down further to use fewer modules, similar to that within the old AdoptOpenJDK JREs
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buildSrc/src/main/groovy/com/thoughtworks/go/build/AdoptiumJreTask.groovy
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| /* | ||
| * Copyright 2021 ThoughtWorks, Inc. | ||
| * | ||
| * Licensed 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. | ||
| */ | ||
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| package com.thoughtworks.go.build | ||
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| import org.gradle.api.DefaultTask | ||
| import org.gradle.api.file.RelativePath | ||
| import org.gradle.api.tasks.* | ||
| import org.gradle.jvm.toolchain.JavaLanguageVersion | ||
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| class AdoptiumJreTask extends DefaultTask { | ||
| @Input AdoptiumVersion version | ||
| @InputFile File sourceJdkArchive | ||
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| @Internal | ||
| File getOutputJdkDir() { | ||
| new File("${project.buildDir}/jdks-tmp/${version.operatingSystem}") | ||
| } | ||
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| @OutputDirectory | ||
| File getOutputDir() { | ||
| new File("${project.buildDir}/jres/${version.operatingSystem}") | ||
| } | ||
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| @TaskAction | ||
| def perform() { | ||
| unpackJdk() | ||
| jlinkJre() | ||
| } | ||
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| private void unpackJdk() { | ||
| project.delete(outputJdkDir) | ||
| def archiveTree = OperatingSystem.windows == version.operatingSystem ? project.zipTree(sourceJdkArchive) : project.tarTree(sourceJdkArchive) | ||
| project.copy { | ||
| from(archiveTree) { | ||
| includeEmptyDirs = false | ||
| eachFile { fcd -> // Drop leading directory (package name, which differes version to version) | ||
| fcd.relativePath = new RelativePath(true, fcd.relativePath.segments.drop(1)) | ||
| } | ||
| } | ||
| into outputJdkDir | ||
| } | ||
| } | ||
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| private void jlinkJre() { | ||
| project.delete(outputDir) | ||
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| // use Gradle toolchains to find a JVM of the appropriate major version for our target JRE | ||
| def jvm = project.javaToolchains.compilerFor { | ||
| languageVersion = JavaLanguageVersion.of(version.featureVersion) | ||
| } | ||
| project.exec { | ||
| commandLine = ["${jvm.get().metadata.installationPath.asFile.absolutePath}/bin/jlink", | ||
| '--add-modules', 'ALL-MODULE-PATH', // TODO make modules configurable input (with default?) | ||
| '--module-path', "${outputJdkDir}/${version.javaModulesRelativePath()}", | ||
| '--strip-debug', '--no-man-pages', '--no-header-files', '--compress=2', | ||
| '--output', "${outputDir}/jre"] | ||
| standardOutput = System.out | ||
| errorOutput = System.err | ||
| } | ||
| } | ||
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| } |
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