set maven.conf default ${maven.home}/conf

[plexus.core]
load       ${maven.conf}/logging
optionally ${maven.home}/lib/ext/redisson/*.jar
optionally ${maven.home}/lib/ext/hazelcast/*.jar
optionally ${user.home}/.m2/ext/*.jar
optionally ${maven.home}/lib/ext/*.jar
load       ${maven.home}/lib/maven-*.jar

        <executions>
          <execution>
            <id>load</id>
            <phase>validate</phase>
            <configuration>
              <resourcePaths>maven-core-it.properties</resourcePaths>
              <pluginClassLoaderOutput>target/pcl.properties</pluginClassLoaderOutput>
            </configuration>
            <goals>
              <goal>load</goal>
            </goals>
          </execution>

    /**
     * A cache key.
     */
    interface Key {
        // marker interface for cache keys
    }

    @FunctionalInterface
    interface PluginDescriptorSupplier {
        PluginDescriptor load()
                throws PluginResolutionException, PluginDescriptorParsingException, InvalidPluginDescriptorException;
    }

    Key createKey(Plugin plugin, List<RemoteRepository> repositories, RepositorySystemSession session);

        File pom0 = new File(localRepo, "p0/pom.xml");
        File pom0Basedir = pom0.getParentFile();
        File pom1 = new File(pom0Basedir, "p1/pom.xml");

        // load the child project, which inherits from p0...
        MavenProject project0 = getProjectWithDependencies(pom0);
        MavenProject project1 = getProjectWithDependencies(pom1);

  also do this with the lister as well
i'l
// 1 the metadata -> model plugin/mojo descriptor
// 2 tools for doing the mapping
// 3 the component model -> interfaces for the plugin

// The plugin manager should load up a directory structure of plugins.
// - a plugin per directory where the plugin is present with its deps
// - a plugin that has its dependencies packaged up with it

                lock = channel.lock();

                if (touchfile.canRead()) {
                    getLogger().debug("Reading resolution-state from: " + touchfile);
                    props.load(Channels.newInputStream(channel));
                }

                props.setProperty(key, Long.toString(System.currentTimeMillis()));

                if (error != null) {

    }

    /**
     * A cache key.
     */
    interface Key {
        // marker interface for cache keys
    }

    @FunctionalInterface
    interface PluginRealmSupplier {
        CacheRecord load() throws PluginResolutionException, PluginContainerException;
    }

    Key createKey(
            Plugin plugin,
            ClassLoader parentRealm,
            Map<String, ClassLoader> foreignImports,

    void testCustomLifecycle() throws ComponentLookupException {
        List<Lifecycle> myLifecycles = new ArrayList<>();
        Lifecycle myLifecycle =
                new Lifecycle("etl", Arrays.asList("extract", "transform", "load"), Collections.emptyMap());
        myLifecycles.add(myLifecycle);
        myLifecycles.addAll(defaultLifeCycles.getLifeCycles());

            if (desc == null) {
                synchronized (key) {
                    desc = descriptors.get(key);
                    if (desc == null) {
                        desc = supplier.load();
                        descriptors.putIfAbsent(key, clone(desc));
                    }
                }
            }
            return clone(desc);

        File pom4 = new File(pom3.getParentFile(), "p4/pom.xml");
        File pom5 = new File(pom4.getParentFile(), "p5/pom.xml");

        System.out.println("Location of project-4's POM: " + pom4.getPath());

        // load everything...
        MavenProject project0 = getProject(pom0);
        MavenProject project1 = getProject(pom1);
        MavenProject project2 = getProject(pom2);
        MavenProject project3 = getProject(pom3);