Extension descriptor, stored in <code>META-INF/maven/extension.xml</code> in an extension's jar artifact to
    precisely control parts of the extension and dependencies to expose in the API class loader.
    Maven uses Plexus Classworlds to build the class loader hierarchy, therefore some concepts used in this extensions
    stem from Plexus Classworlds originally.

    static InternalSession from(Session session) {
        return cast(InternalSession.class, session, "session should be an " + InternalSession.class);
    }

    static InternalSession from(org.eclipse.aether.RepositorySystemSession session) {
        return cast(InternalSession.class, session.getData().get(InternalSession.class), "session");
    }

        String myResourcePath = ExpressionDocumenter.class.getName().replace('.', '/') + ".class";

        URL myResource = ExpressionDocumenter.class.getClassLoader().getResource(myResourcePath);

        assert myResource != null : "The resource is this class itself loaded by its own classloader and must exist";

        String myClasspathEntry = myResource.getPath();

META-INF/MANIFEST.MF Manifest-Version: 1.0 Archiver-Version: Plexus Archiver Created-By: Apache Maven Built-By: BEBE Build-Jdk: 1.4.2_16 org/apache/maven/its/mng3906/SomeClass.class package org.apache.maven.its.mng3906; public synchronized class SomeClass { public void SomeClass(); } pom.xml 4.0.0 org.apache.maven.its.mng3906 e 0.1 jar maven-core-it file:///${basedir}/repo true true . pom.xml src/** src/main/resources src/main/java/org/apache/maven/its/mng3906/SomeClass.java src/main/java/org...

    }

    @Test
    void testArtifactInstallation() throws Exception {
        sessionScope.enter();
        try {
            sessionScope.seed(MavenSession.class, mock(MavenSession.class));

            String artifactBasedir = new File(getBasedir(), "src/test/resources/artifact-install").getAbsolutePath();

            Artifact artifact = createArtifact("artifact", "1.0");

import org.apache.maven.utils.Os;

/**
 * Assists the project builder. <strong>Warning:</strong> This is an internal utility class that is only public for
 * technical reasons, it is not part of the public API. In particular, this class can be changed or deleted without
 * prior notice.
 *
 * @since 3.0
 */
public class EnvironmentUtils {

    private static Properties envVars;

    /**

//      from the plugin archive.
// TODO this will be the class that people get in IDEs to modify

/**
 * MavenExecutionPlan
 */
public class MavenExecutionPlan implements Iterable<ExecutionPlanItem> {

    /*
      At the moment, this class is totally immutable, and this is in line with thoughts about the

import org.codehaus.plexus.configuration.PlexusConfiguration;

/**
 * Print warnings if deprecated core parameters are used in mojo.
 *
 * @since 3.9.1
 */
@Singleton
@Named
class DeprecatedCoreExpressionValidator extends AbstractMavenPluginParametersValidator {
    private static final HashMap<String, String> DEPRECATED_CORE_PARAMETERS;

    private static final String ARTIFACT_REPOSITORY_REASON =

import org.codehaus.plexus.interpolation.RegexBasedInterpolator;

/**
 * Builds the effective toolchains from a user toolchains file and/or a global toolchains file.
 *
 */
@Named
public class DefaultToolchainsBuilder implements ToolchainsBuilder {

    private final MavenToolchainsMerger toolchainsMerger = new MavenToolchainsMerger();

    @Override

import org.apache.maven.toolchain.building.ToolchainsBuildingException;
import org.apache.maven.toolchain.building.ToolchainsBuildingResult;

@Named
@Singleton
public class DefaultToolchainsBuilder implements ToolchainsBuilder {

    private final org.apache.maven.toolchain.building.ToolchainsBuilder builder;

    @Inject