+ artifact.getScope() + " wins)");

        // TODO better way than static? this might hide messages in a reactor
        if (!ignoredArtifacts.contains(artifact)) {
            logger.warn("\n\tArtifact " + artifact + " retains local artifactScope '" + artifact.getScope()

            // phase 1: get file Models from the reactor.
            List<InterimResult> interimResults = build(projectIndex, pomFiles, new LinkedHashSet<>(), true, recursive);

            ClassLoader oldContextClassLoader = Thread.currentThread().getContextClassLoader();

            try {
                // Phase 2: get effective models from the reactor

                if (reactorContext.getReactorBuildStatus().isHalted()) {
                    break;
                }

                // MNG-6170: Only schedule other modules from reactor if we have more modules to build than one.
                if (analyzer.getNumberOfBuilds() > 1) {
                    final List<MavenProject> newItemsThatCanBeBuilt =

                    String msg = str + " aggregator mojo is already being executed "
                            + "in this parallel build, those kind of mojos require exclusive access to "
                            + "reactor to prevent race conditions. This mojo execution will be blocked "
                            + "until the aggregator mojo is done.";
                    warn(msg);
                    acquiredAggregatorLock.lock();

                        projectId,
                        conflictingProject.getFile(),
                        project.getFile(),
                        "Project '" + projectId + "' is duplicated in the reactor");
            }

            String projectKey = ArtifactUtils.versionlessKey(project.getGroupId(), project.getArtifactId());

import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;
import org.apache.maven.repository.Proxy;

/**
 * Abstraction of an artifact repository. Artifact repositories can be remote, local, or even build reactor or
 * IDE workspace.
 */
// TODO completely separate local and remote artifact repositories
public class MavenArtifactRepository implements ArtifactRepository {
    private static final String LS = System.lineSeparator();

                throw new ArtifactDescriptorException(result);
            }

            Model model;

            // TODO hack: don't rebuild model if it was already loaded during reactor resolution
            final WorkspaceReader workspace = session.getWorkspaceReader();
            if (workspace instanceof MavenWorkspaceReader) {
                model = ((MavenWorkspaceReader) workspace).findModel(pomArtifact);

 *
 * <p>To react to events, we recommend a reactive-streams framework like <a
 * href="https://github.com/ReactiveX/RxJava/wiki">RxJava</a> (supplemented with its <a
 * href="https://github.com/ReactiveX/RxAndroid">RxAndroid</a> extension if you are building for
 * Android) or <a href="https://projectreactor.io/">Project Reactor</a>. (For the basics of

    /**
     * The full set of projects before any potential constraining by --projects. Useful in the case where you want to
     * build a smaller set of projects but perform other operations in the context of your reactor.
     */
    private List<MavenProject> allProjects;

    private MavenProject topLevelProject;

    private ProjectDependencyGraph projectDependencyGraph;

    private boolean parallel;

    /**

                }
            }
        }
        return null;
    }

    private boolean isSafelyCacheable(RepositorySystemSession session, Artifact artifact) {
        /*
         * The workspace/reactor is in flux so we better not assume definitive information for any of its
         * artifacts/projects.
         */

        WorkspaceReader workspace = session.getWorkspaceReader();
        if (workspace == null) {