} else {
            pomRepositories =
                    remoteRepositoryManager.aggregateRepositories(session, pomRepositories, newRepositories, true);
            repositories = remoteRepositoryManager.aggregateRepositories(
                    session, pomRepositories, externalRepositories, false);
        }
    }

            }
        }
        mavenRepositorySystem.injectMirror(repositorySession, pomRepositories);
        mavenRepositorySystem.injectProxy(repositorySession, pomRepositories);
        mavenRepositorySystem.injectAuthentication(repositorySession, pomRepositories);
        return pomRepositories;
    }

    private boolean hasFile(Artifact artifact) {
        return artifact != null

 *
 */
public class EmptyProjectBuildingHelper implements ProjectBuildingHelper {

    public List<ArtifactRepository> createArtifactRepositories(
            List<Repository> pomRepositories,
            List<ArtifactRepository> externalRepositories,
            ProjectBuildingRequest request) {
        if (externalRepositories != null) {
            return externalRepositories;
        } else {

            repositories = repositoryFactory.aggregate(session, repositories, repos, true);
            pomRepositories = repositories;
        } else {
            pomRepositories = repositoryFactory.aggregate(session, pomRepositories, repos, true);
            repositories = repositoryFactory.aggregate(session, pomRepositories, externalRepositories, false);
        }
    }

    @Override

            List<Repository> pomRepositories,
            List<ArtifactRepository> externalRepositories,
            ProjectBuildingRequest request)
            throws InvalidRepositoryException {
        List<ArtifactRepository> internalRepositories = new ArrayList<>();

        for (Repository repository : pomRepositories) {

 * prior notice.
 *
 */
public interface ProjectBuildingHelper {

    /**
     * Creates the effective artifact repositories from the specified POM repositories.
     *
     * @param pomRepositories The POM repositories to create the artifact repositories from, must not be {@code null}.
     * @param externalRepositories The external (and already mirrored) repositories to merge into the result list, may