}
        }
    }
}
// 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() {

====
include::sample[dir="kotlin",files="buildSrc/src/main/kotlin/myproject.java-conventions.gradle.kts[tags=toolchain]"]
include::sample[dir="groovy",files="buildSrc/src/main/groovy/myproject.java-conventions.gradle[tags=toolchain]"]
====

While most modules are fine with the defaults, the `list` subproject overrides the defaults as it has more specific requirements.

====

import org.gradle.nativeplatform.platform.internal.NativePlatformInternal
import org.gradle.nativeplatform.toolchain.GccPlatformToolChain
import org.gradle.nativeplatform.toolchain.internal.gcc.metadata.SystemLibraryDiscovery
import org.gradle.nativeplatform.toolchain.internal.metadata.CompilerMetaDataProviderFactory
import org.gradle.process.internal.ExecActionFactory

        when: "build has no toolchain repositories configured"
        settingsFile.text = ''

        then: "build runs again, uses previously auto-provisioned toolchain and warns about toolchain repositories not being configured"
        executer
                .expectDocumentedDeprecationWarning("Using a toolchain installed via auto-provisioning, but having no toolchain repositories configured. " +

    <version>4.0.0-beta-4-SNAPSHOT</version>
  </parent>

  <artifactId>maven-toolchain-model</artifactId>

  <name>Maven Toolchain Model</name>
  <description>Maven Toolchain model.</description>

  <dependencies>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-toolchain</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.maven</groupId>

 */

package org.gradle.nativeplatform.toolchain.internal.swift;

import org.gradle.nativeplatform.platform.NativePlatform;
import org.gradle.nativeplatform.toolchain.CommandLineToolConfiguration;
import org.gradle.nativeplatform.toolchain.SwiftcPlatformToolChain;
import org.gradle.nativeplatform.toolchain.internal.ToolType;
import org.gradle.nativeplatform.toolchain.internal.tools.CommandLineToolConfigurationInternal;

        executionRequest.setToolchains(toolchainModels);
        when(session.getRequest()).thenReturn(executionRequest);

        List<Toolchain> toolchains = toolchainManager.getToolchains(session, "unknown", null);

        assertEquals(0, toolchains.size());
        verify(logger).error("Missing toolchain factory for type: unknown. Possibly caused by misconfigured project.");
    }

    @Test
    void testModelAndFactory() {

package org.myorg;

import org.gradle.api.Plugin;
import org.gradle.api.initialization.Settings;
import org.gradle.jvm.toolchain.JavaToolchainResolverRegistry;

import javax.inject.Inject;

// tag::java-toolchain-resolver-plugin[]
public abstract class JavaToolchainResolverPlugin implements Plugin<Settings> { // <1>
    @Inject
    protected abstract JavaToolchainResolverRegistry getToolchainResolverRegistry(); // <2>

               .assertHasCause("No matching toolchain could be found in the locally installed toolchains or the configured toolchain download repositories. " +
                   "Some toolchain resolvers had provisioning failures: custom (Unable to download toolchain matching the requirements " +