import org.apache.maven.project.MavenProject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static java.util.Objects.requireNonNull;

/**
 * Starts the build life cycle
 */
@Named("concurrent")
@Singleton
public class ConcurrentLifecycleStarter implements LifecycleStarter {
    private final Logger logger = LoggerFactory.getLogger(getClass());

   - [version] tells maven what release of this artifact we're trying to produce.
       The fact that a project has a distinct pom.xml should indicate a separate
       release cycle that is also distinct to that project, so a concrete version
       declaration is required.

   - [name] tells maven what the user-friendly name of this project is. The name

        }
    }

    @Override
    public void omitForCycle(Artifact omitted) {
        logger.debug(indent + omitted + " (removed - causes a cycle in the graph)");
    }

    @Override
    public void updateScopeCurrentPom(Artifact artifact, String ignoredScope) {

                org.apache.maven.model.building.ModelProblem cycle = results.stream()
                        .flatMap(r -> r.getProblems().stream())
                        .filter(p -> p.getException() instanceof CycleDetectedException)
                        .findAny()
                        .orElse(null);
                if (cycle != null) {

   * use {@code Stream.generate(() -> collection).flatMap(Collection::stream)}.
   */
  public final FluentIterable<E> cycle() {
    return from(Iterables.cycle(getDelegate()));
  }

  /**
   * Returns a fluent iterable whose iterators traverse first the elements of this fluent iterable,

   * should use an explicit {@code break} or be certain that you will eventually remove all the
   * elements.
   */
  @SafeVarargs
  public static <T extends @Nullable Object> Iterator<T> cycle(T... elements) {
    return cycle(Lists.newArrayList(elements));
  }

  /**
   * Returns an Iterator that walks the specified array, nulling out elements behind it. This can

            if (!visited.add(a.getGroupId() + ':' + a.getArtifactId() + ':' + a.getBaseVersion())) {
                RepositoryException exception =
                        new RepositoryException("Artifact relocations form a cycle: " + visited);
                invalidDescriptor(session, trace, a, exception);
                if ((getPolicy(session, a, request) & ArtifactDescriptorPolicy.IGNORE_INVALID) != 0) {
                    return null;

succeeded or failed respectively. On the destination side, a `X-Amz-Replication-Status` status of `REPLICA` indicates that the object was replicated successfully. Any replication failures are automatically re-attempted during a periodic disk scanner cycle.

To perform bi-directional replication, repeat the above process on the target site - this time setting the source bucket as the replication target. It is recommended that replication be run in a system with at least two CPU's available...

   */
  public static void awaitClear(WeakReference<?> ref) {
    awaitDone(() -> ref.get() == null);
  }

  /**
   * Tries to perform a "full" garbage collection cycle (including processing of weak references and
   * invocation of finalize methods) and waits for it to complete. Ensures that at least one weak

    if (isWindows()) {
      return; // TODO: b/136041958 - Can we detect cycles under Windows?
    }
    ClassLoader loader = ClassPathTest.class.getClassLoader();
    // directory with a cycle,
    // /root
    //    /left
    //       /[sibling -> right]
    //    /right
    //       /[sibling -> left]
    Path root = createTempDirectory("ClassPathTest");
    try {