return;
        }
        if (Features.consumerPom(session.getUserProperties())) {
            Path buildDir =
                    project.getBuild() != null ? Paths.get(project.getBuild().getDirectory()) : null;
            if (buildDir != null) {
                Files.createDirectories(buildDir);
            }
            Path consumer = buildDir != null

    @Override
    public void expandPluginConfiguration(Model model, ModelBuildingRequest request, ModelProblemCollector problems) {
        Build build = model.getBuild();

        if (build != null) {
            expand(build.getPlugins());

            PluginManagement pluginManagement = build.getPluginManagement();

            if (pluginManagement != null) {

            if (project.hasLifecyclePhase("test-compile")) {
                return new File(project.getBuild().getTestOutputDirectory());
            }
        } else {
            String type = artifact.getProperty("type", "");
            File outputDirectory = new File(project.getBuild().getOutputDirectory());

            // Check if the project is being built during this session, and if we can expect any output.

        File pom1 = new File(pom0Basedir, "p1/pom.xml");

        getProjectWithDependencies(pom0);
        MavenProject project1 = getProjectWithDependencies(pom1);

        Map pluginMap = project1.getBuild().getPluginsAsMap();
        Plugin compilerPlugin = (Plugin) pluginMap.get("org.apache.maven.plugins:maven-compiler-plugin");

        assertNotNull(compilerPlugin);

    /**
     * Returns the project model.
     */
    @Nonnull
    Model getModel();

    /**
     * Shorthand method.
     */
    @Nonnull
    default Build getBuild() {
        Build build = getModel().getBuild();
        return build != null ? build : Build.newInstance();
    }

    /**
     * Returns the path to the pom file for this project.

    /**
     * ManagementModelMerger
     */
    protected static class ManagementModelMerger extends MavenModelMerger {

        public Model mergeManagedBuildPlugins(Model model) {
            Build build = model.getBuild();
            if (build != null) {
                PluginManagement pluginManagement = build.getPluginManagement();
                if (pluginManagement != null) {

            throw new IllegalArgumentException("artifactId cannot be empty");
        }

        if (model != null) {
            Build build = model.getBuild();
            if (build != null) {
                for (Plugin plugin : build.getPlugins()) {
                    if (groupId.equals(plugin.getGroupId()) && artifactId.equals(plugin.getArtifactId())) {

                .collect(Collectors.toList());
    }

    private static boolean isEmpty(Profile profile) {
        return profile.getActivation() == null
                && profile.getBuild() == null
                && profile.getDependencies().isEmpty()
                && (profile.getDependencyManagement() == null
                        || profile.getDependencyManagement().getDependencies().isEmpty())

        if (modelV3 == null || basedir == null) {
            return;
        }

        Model model = modelV3.getDelegate();
        Build build = model.getBuild();
        Build newBuild = null;
        if (build != null) {
            newBuild = Build.newBuilder(build)
                    .directory(alignToBaseDirectory(build.getDirectory(), basedir))

        // Value taken from super model
        // ----------------------------------------------------------------------

        assertEquals("4.0.0", project4.getModelVersion());

        Build build = project4.getBuild();
        List<Plugin> plugins = build.getPlugins();

        Map<String, Integer> validPluginCounts = new HashMap<>();

        String testPluginArtifactId = "maven-compiler-plugin";