"local" toolchains

gradle.properties

# $HOME/.gradle/jdks
# https://api.foojay.io/swagger-ui/
# https://api.foojay.io/disco/v3.0/packages?version=25&distribution=liberica&architecture=aarch64&archive_type=tar.gz&package_type=jdk&operating_system=macos&javafx_bundled=false
toolchains.local.JDK23.AARCH64.MAC_OS=https://github.com/bell-sw/Liberica/releases/download/23+38/bellsoft-jdk23+38-macos-aarch64.tar.gz
toolchains.local.JDK25.AARCH64.MAC_OS=https://github.com/bell-sw/Liberica/releases/download/25+37/bellsoft-jdk25+37-macos-aarch64.tar.gz

settings.gradle

rootProject.name = 'gradle-test'

public abstract class LocalJavaToolchainResolver implements JavaToolchainResolver {
	private static final Logger logger = Logging.getLogger(LocalJavaToolchainResolver.class)

	public java.util.Optional<JavaToolchainDownload> resolve(JavaToolchainRequest request) {
		String key = getKey(request)
		String uri = loadLocalToolChainProperties()[key]
		logger.quiet("Resolved Toolchain: $key -> $uri")
		return java.util.Optional.ofNullable(uri).collect{ JavaToolchainDownload.fromUri(new URI(it)) }
	}

	private String getKey(JavaToolchainRequest request) {
		String version = request.javaToolchainSpec.languageVersion.get()
		String arch = request.buildPlatform.architecture
		String os = request.buildPlatform.operatingSystem
		return "toolchains.local.JDK${version}.${arch}.${os}"
	}

	private Map loadLocalToolChainProperties() {
		Properties gradleProperties = new Properties()
		new File('gradle.properties').withInputStream { gradleProperties.load(it) }
		return gradleProperties.findAll { it.key.startsWith('toolchains.local.') }
	}
}

public abstract class LocalJavaToolchainResolverPlugin implements Plugin<Settings> {
	@Inject
	protected abstract JavaToolchainResolverRegistry getToolchainResolverRegistry();

	public void apply(Settings settings) {
		settings.getPluginManager().apply("jvm-toolchain-management")
		getToolchainResolverRegistry().register(LocalJavaToolchainResolver.class)
	}
}

apply plugin: LocalJavaToolchainResolverPlugin

toolchainManagement {
	jvm {
		javaRepositories {
			repository('local') { resolverClass = LocalJavaToolchainResolver }
		}
	}
}