}
            }
            if (!requests.isEmpty()) {
                List<ArtifactResult> results =
                        session.getRepositorySystem().resolveArtifacts(session.getSession(), requests);
                for (ArtifactResult result : results) {
                    Artifact artifact = session.getArtifact(result.getArtifact());
                    Path path = result.getArtifact().getPath();

            throw problems.newModelBuilderException();
        }

        inputModel = activateFileModel(inputModel, request, result, problems);

        problems.setRootModel(inputModel);

        ModelData resultData = new ModelData(request.getSource(), inputModel);
        String superModelVersion = inputModel.getModelVersion() != null ? inputModel.getModelVersion() : "4.0.0";
        if (!VALID_MODEL_VERSIONS.contains(superModelVersion)) {

            List<ProjectBuildingResult> results = doBuild(pomFiles, recursive);
            if (results.stream()
                    .flatMap(r -> r.getProblems().stream())
                    .anyMatch(p -> p.getSeverity() != org.apache.maven.model.building.ModelProblem.Severity.WARNING)) {
                org.apache.maven.model.building.ModelProblem cycle = results.stream()

[![Jenkins tests](https://img.shields.io/jenkins/t/https/ci-maven.apache.org/job/Maven/job/maven-box/job/maven/job/master.svg?)][test-results]


Apache Maven is a software project management and comprehension tool. Based on
the concept of a project object model (POM), Maven can manage a project's

* UPDATE: 18-April-2005

  We cannot take the approach outlined below of detecting which remote
  repositories are "really" offline, since offline mode is more of a behavior,
  and this will lead to counter-intuitive results. A different feature may exist
  unimplemented, which is to detect when the network is down and provide better
  feedback for that case. However, when offline mode is declared, nothing

        allOptionalSelectors.addAll(projectActivation.getOptionalActiveProjectSelectors());
        allOptionalSelectors.addAll(projectActivation.getRequiredActiveProjectSelectors());
        // We intentionally ignore the results of this method.
        // As a side effect it will log the optional projects that could not be resolved.
        projectSelector.getOptionalProjectsBySelectors(request, session.getAllProjects(), allOptionalSelectors);
    }

     *            build only the specified POM files.
     * @param request The project builder configuration that provides further parameters, must not be {@code null}.
     * @return The results of the project builder where each result corresponds to one project that was built, never
     *         {@code null}.
     * @throws ProjectBuildingException If an error was encountered during building of any project.

        InternalSession.associate(rsession, session);

        List<ProjectBuildingResult> results = projectBuilder.build(
                Collections.singletonList(new File("src/test/resources/projects/tree/pom.xml")), true, request);

        assertEquals(3, results.size());
    }

    }

    /**
     * Success with warnings
     *
     * @param model
     * @param results
     */
    public static <T> Result<T> success(T model, Result<?>... results) {
        final List<ModelProblem> problemsList = new ArrayList<>();

        for (Result<?> result1 : results) {
            for (ModelProblem modelProblem : result1.getProblems()) {
                problemsList.add(modelProblem);

            throws ArtifactResolutionException {
        List<ArtifactResult> results = new ArrayList<>();

        for (ArtifactRequest request : requests) {
            ArtifactResult result = new ArtifactResult(request);
            results.add(result);

            Artifact artifact = request.getArtifact();
            if ("maven-test".equals(artifact.getGroupId())) {