}

    public static List<RemoteRepository> toRepos(List<ArtifactRepository> repos) {
        return Optional.ofNullable(repos).orElse(Collections.emptyList()).stream()
                .map(RepositoryUtils::toRepo)
                .collect(Collectors.toList());
    }

    public static RemoteRepository toRepo(ArtifactRepository repo) {
        RemoteRepository result = null;
        if (repo != null) {

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.handler.ArtifactHandler;
import org.apache.maven.artifact.metadata.ArtifactMetadata;
import org.apache.maven.artifact.repository.ArtifactRepository;

/**
 * FlatRepositoryLayout
 */
@Named("flat")
@Singleton
@Deprecated
public class FlatRepositoryLayout implements ArtifactRepositoryLayout {

import org.apache.maven.api.services.ProjectBuilderRequest;
import org.apache.maven.api.services.ProjectBuilderResult;
import org.apache.maven.api.services.Source;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.model.building.ModelProblem;
import org.apache.maven.model.building.ModelSource2;
import org.apache.maven.project.DefaultProjectBuildingRequest;

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.plugin;

import java.util.Map;

import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
import org.apache.maven.artifact.resolver.ArtifactResolutionException;
import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;

      <configuration>
        <![CDATA[
      Inside ~/.m2/settings.xml:

      <localRepository>/path/to/local/repository</localRepository>
      ]]></configuration>
      <description>The ArtifactRepository instance referencing the local artifact
        repository.</description>
      <cliOptions>
        <cliOption>
          <key>-Dmaven.repo.local=/path/to/local/repo</key>

 */
package org.apache.maven.plugin.internal;

import javax.inject.Inject;
import javax.inject.Named;
import javax.inject.Singleton;

import java.util.Map;

import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
import org.apache.maven.artifact.resolver.ArtifactResolutionException;
import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.stream.Collectors;

import org.apache.maven.api.Session;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.RepositoryCache;
import org.apache.maven.internal.impl.SettingsUtilsV4;
import org.apache.maven.model.Profile;
import org.apache.maven.monitor.event.EventDispatcher;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.maven.api.Constants;
import org.apache.maven.artifact.InvalidRepositoryException;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.bridge.MavenRepositorySystem;
import org.apache.maven.settings.Mirror;
import org.apache.maven.settings.Proxy;
import org.apache.maven.settings.Repository;

 - if required and null squawk

      <configuration>
        <attached implementation="boolean" default-value="true"/>
        <localRepository implementation="org.apache.maven.artifact.repository.ArtifactRepository">${localRepository}</localRepository>
        <resources implementation="java.util.List">${project.resources}</resources>
        <repositories implementation="java.util.List">${project.repositories}</repositories>

    //
    //        ArtifactRepositoryFactory repoFactory = (ArtifactRepositoryFactory) lookup(
    // ArtifactRepositoryFactory.class );
    //        ArtifactRepository localArtifactRepo = repoFactory.createLocalRepository( localRepo );
    //
    //        MavenProject project1 = getProjectBuilder().buildFromRepository( artifact, Collections.EMPTY_LIST,
    // localArtifactRepo );