repo.setLayout(profileXmlRepo.getLayout());
        repo.setName(profileXmlRepo.getName());
        repo.setUrl(profileXmlRepo.getUrl());

        if (profileXmlRepo.getSnapshots() != null) {
            repo.setSnapshots(convertRepositoryPolicy(profileXmlRepo.getSnapshots()));
        }
        if (profileXmlRepo.getReleases() != null) {
            repo.setReleases(convertRepositoryPolicy(profileXmlRepo.getReleases()));
        }

        repository.setId(RepositorySystem.DEFAULT_REMOTE_REPO_ID);
        repository.setUrl("file://" + repoDir.toURI().getPath());
        repository.setReleases(policy);
        repository.setSnapshots(policy);

        return Arrays.asList(repositorySystem.buildArtifactRepository(repository));
    }

    protected ArtifactRepository getLocalRepository() throws Exception {

        repository.setId(MavenRepositorySystem.DEFAULT_REMOTE_REPO_ID);
        repository.setUrl("file://" + repoDir.toURI().getPath());
        repository.setReleases(policy);
        repository.setSnapshots(policy);

        return Arrays.asList(mavenRepositorySystem.buildArtifactRepository(repository));
    }

    protected List<ArtifactRepository> getPluginArtifactRepositories() throws InvalidRepositoryException {

        modelRepository.setUrl(settingsRepository.getUrl());
        modelRepository.setReleases(fromSettingsRepositoryPolicy(settingsRepository.getReleases()));
        modelRepository.setSnapshots(fromSettingsRepositoryPolicy(settingsRepository.getSnapshots()));
        return modelRepository;
    }

    public static org.apache.maven.model.RepositoryPolicy fromSettingsRepositoryPolicy(

            ArtifactRepositoryPolicy policy = new ArtifactRepositoryPolicy(repository.getReleases());
            policy.merge(repository.getSnapshots());
            return policy;
        } else if ((nature & RepositoryMetadata.SNAPSHOT) != 0) {
            return repository.getSnapshots();
        } else {
            return repository.getReleases();
        }
    }

    @Override
    public ArtifactRepositoryPolicy getReleases() {
        return userLocalArtifactRepository.getReleases();
    }

    @Override
    public ArtifactRepositoryPolicy getSnapshots() {
        return userLocalArtifactRepository.getSnapshots();
    }

    @Override
    public String getKey() {
        return userLocalArtifactRepository.getKey();
    }

    @Override
    public String getUrl() {

                && Objects.equals(r1.getUrl(), r2.getUrl())
                && repositoryPolicyEquals(r1.getReleases(), r2.getReleases())
                && repositoryPolicyEquals(r1.getSnapshots(), r2.getSnapshots());
    }

    private static boolean repositoryPolicyEquals(ArtifactRepositoryPolicy p1, ArtifactRepositoryPolicy p2) {
        if (p1 == p2) {
            return true;
        }

    private static Metadata createMetadata(Artifact artifact) {
        Snapshot snapshot = new Snapshot();
        snapshot.setLocalCopy(true);
        Versioning versioning = new Versioning();
        versioning.setSnapshot(snapshot);

        Metadata metadata = new Metadata();
        metadata.setVersioning(versioning);
        metadata.setGroupId(artifact.getGroupId());
        metadata.setArtifactId(artifact.getArtifactId());

    void mergeSnapshotWithEmptyList() throws Exception {
        Snapshot snapshot = new Snapshot();
        snapshot.setBuildNumber(3);
        snapshot.setTimestamp("20200710.072412");
        target.getVersioning().setSnapshot(snapshot);
        target.getVersioning().setLastUpdated("20200921071745");
        SnapshotVersion sv = new SnapshotVersion();
        sv.setClassifier("sources");
        sv.setExtension("jar");

            snapshot.setTimestamp(utcDateFormatter.format(timestamp));

            Versioning versioning = new Versioning();
            versioning.setSnapshot(snapshot);
            versioning.setLastUpdatedTimestamp(timestamp);
            lastUpdated = versioning.getLastUpdated();

            metadata.setVersioning(versioning);
        } else {