package org.apache.maven.plugin.dependency.resolvers;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  * http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 import org.apache.maven.artifact.Artifact;

 import org.apache.maven.artifact.repository.ArtifactRepository;

 import org.apache.maven.artifact.resolver.ArtifactResolutionException;

 import org.apache.maven.artifact.resolver.ArtifactResolutionResult;

 import org.apache.maven.artifact.resolver.ResolutionListener;

 import org.apache.maven.artifact.resolver.ResolutionNode;

 import org.apache.maven.plugin.MojoExecutionException;

 import org.apache.maven.plugin.dependency.AbstractDependencyMojo;

 import org.apache.maven.plugins.annotations.Mojo;

 import org.apache.maven.plugins.annotations.ResolutionScope;

 import org.apache.maven.shared.artifact.filter.ScopeArtifactFilter;

 import java.util.ArrayList;

 import java.util.HashSet;

 import java.util.Set;

 /**

  * Goal that resolves all project dependencies and then lists the repositories

  * used by the build and by the transitive dependencies

  *

  * @author <a href="mailto:brianf@apache.org">Brian Fox</a>

  * @version $Id: GoOfflineMojo.java 728546 2008-12-21 22:56:51Z bentmann $

  * @since 2.2

  */

 @Mojo( name = "list-repositories", requiresDependencyResolution = ResolutionScope.TEST, threadSafe = true )

 public class ListRepositoriesMojo

     extends AbstractDependencyMojo

 {

     /**

      * Displays a list of the repositories used by this build.

      *

      * @throws MojoExecutionException with a message if an error occurs.

      */

     public void execute()

         throws MojoExecutionException

     {

         try

         {

             ArtifactResolutionResult result =

                 this.artifactCollector.collect( project.getArtifacts(), project.getArtifact(), this.getLocal(),

                                                 this.remoteRepos, this.artifactMetadataSource,

                                                 new ScopeArtifactFilter( Artifact.SCOPE_TEST ),

                                                 new ArrayList<ResolutionListener>() );

             Set<ArtifactRepository> repos = new HashSet<ArtifactRepository>();

             Set<ResolutionNode> nodes = result.getArtifactResolutionNodes();

             for ( ResolutionNode node : nodes )

             {

                 repos.addAll( node.getRemoteRepositories() );

             }

             this.getLog().info( "Repositories Used by this build:" );

             for ( ArtifactRepository repo : repos )

             {

                 this.getLog().info( repo.toString() );

             }

         }

         catch ( ArtifactResolutionException e )

         {

             throw new MojoExecutionException( "Unable to resolve artifacts", e );

         }

     }

 }