// tag::custom-toolchain-task-with-java[]
abstract class CustomTaskUsingToolchains extends DefaultTask {

    @Nested
    abstract Property<JavaLauncher> getLauncher() // <1>

    CustomTaskUsingToolchains() {
        def toolchain = project.extensions.getByType(JavaPluginExtension.class).toolchain // <2>
        Provider<JavaLauncher> defaultLauncher = getJavaToolchainService().launcherFor(toolchain) // <3>

			gover.Startup.AutoToolchain = toolchain
		} else {
			if toolchain != "" {
				// Accept toolchain only if it is > our min.
				// (If it is equal, then min satisfies it anyway: that can matter if min
				// has a suffix like "go1.21.1-foo" and toolchain is "go1.21.1".)
				toolVers := gover.FromToolchain(toolchain)
				if toolVers == "" || (!strings.HasPrefix(toolchain, "go") && !strings.Contains(toolchain, "-go")) {

mkdir m1_22_0
go mod init -C m1_22_0
go mod edit -C m1_22_0 -go=1.22.0 -toolchain=go1.99.0
mkdir m1_22_1
go mod init -C m1_22_1
go mod edit -C m1_22_1 -go=1.22.1 -toolchain=go1.99.1
mkdir m1_24_rc0
go mod init -C m1_24_rc0
go mod edit -C m1_24_rc0 -go=1.24rc0 -toolchain=go1.99.2

go work init
grep '^go 1.50$' go.work
! grep toolchain go.work

# work use with older modules should leave go 1.50 in the go.work.

                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("Java Toolchain auto-detection failed to parse Maven Toolchains located at {}", toolchainFile, e);
                } else {
                    LOGGER.info("Java Toolchain auto-detection failed to parse Maven Toolchains located at {}. {}", toolchainFile, e.getMessage());
                }
            }
        }

    // Define a preprocessor macro for every binary
    macros.put("NDEBUG", null)

    // Define a compiler options
    compilerArgs.add("-W3")

    // Define toolchain-specific compiler options
    compilerArgs.addAll(toolChain.map { toolChain ->
        when (toolChain) {
            is Gcc, is Clang -> listOf("-O2", "-fno-access-control")
            is VisualCpp -> listOf("/Zi")
            else -> listOf()
        }
    })
}

            java {
                toolchain {
                    languageVersion = JavaLanguageVersion.of(${jdkMetadata1.languageVersion.majorVersion})
                }
            }

            project.getExtensions().getByType(JavaToolchainService.class)
                .launcherFor(java.toolchain)
                .get()

                    org.apache.maven.toolchain.model.ToolchainModel tm =
                            new org.apache.maven.toolchain.model.ToolchainModel(toolchainModel);
                    toRet.add(fact.createToolchain(tm));
                }
            }

            // add default toolchain
            ToolchainPrivate tool = fact.createDefaultToolchain();
            if (tool != null) {

import org.gradle.nativeplatform.toolchain.internal.NativeCompileSpec;
import org.gradle.nativeplatform.toolchain.internal.NativeCompiler;
import org.gradle.nativeplatform.toolchain.internal.OptionsFileArgsWriter;

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

            }
        }
    }
}
// end::toolchain-management[]

rootProject.name = 'toolchain-management'

abstract class MadeUpPlugin implements Plugin<Settings> {

    @Inject
    protected abstract JavaToolchainResolverRegistry getToolchainResolverRegistry();

    void apply(Settings settings) {
        settings.getPlugins().apply("jvm-toolchain-management")

// If Switch decides to switch toolchains but cannot identify a toolchain to use.
// it prints the errors along with one more about not being able to find the toolchain
// and returns.
//
// Otherwise, Switch prints an informational message giving a reason for the
// switch and the toolchain being invoked and then switches toolchains.
// This operation never returns.
func (s *Switcher) Switch(ctx context.Context) {
	if !s.NeedSwitch() {