throw new IllegalStateException();
                case SETUP:
                    attachToThread(step);
                    transformerManager.injectTransformedArtifacts(session.getRepositorySession(), step.project);
                    projectExecutionListener.beforeProjectExecution(new ProjectExecutionEvent(session, step.project));
                    eventCatapult.fire(ExecutionEvent.Type.ProjectStarted, session, null);

                        MojoDescriptor mojoDescriptor = pluginManager.getMojoDescriptor(
                                plugin, goal, project.getRemotePluginRepositories(), session.getRepositorySession());

                        phase = mojoDescriptor.getPhase();
                        if (aliases.containsKey(phase)) {
                            phase = aliases.get(phase);
                        }

        if (plugin.isExtensions()) {
            ExtensionRealmCache.CacheRecord extensionRecord;
            try {
                RepositorySystemSession repositorySession = session.getRepositorySession();
                extensionRecord = setupExtensionsRealm(project, plugin, repositorySession);
            } catch (PluginManagerException e) {
                // extensions realm is expected to be fully setup at this point

        MavenExecutionRequest request = session.getRequest();
        request.getProjectBuildingRequest().setRepositorySession(session.getRepositorySession());

        // 1. Collect project for invocation without a POM.
        if (request.getPom() == null) {
            return pomlessCollectionStrategy.collectProjects(request);
        }

        }
    }

    private RepositorySystemSession getSession(ArtifactRepository localRepository) {
        return LegacyLocalRepositoryManager.overlay(localRepository, legacySupport.getRepositorySession(), null);
    }

    private void injectSession1(RepositoryRequest request, MavenSession session) {
        if (session != null) {
            request.setOffline(session.isOffline());