package org.apache.maven.plugin.plugin.metadata;
   
   /*
    * 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.metadata.ArtifactRepositoryMetadata;
  import org.apache.maven.artifact.repository.metadata.GroupRepositoryMetadata;
  import org.apache.maven.artifact.repository.metadata.Versioning;
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugin.descriptor.PluginDescriptor;
  import org.apache.maven.plugins.annotations.LifecyclePhase;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.project.MavenProject;
  
  /**
   * Inject any plugin-specific
   * <a href="/ref/current/maven-repository-metadata/repository-metadata.html">artifact metadata</a> to the project's
   * artifact, for subsequent installation and deployment.
   * It is used:
   * <ol>
   * <li>to add the <code>latest</code> metadata (which is plugin-specific) for shipping alongside the plugin's
   *     artifact</li>
   * <li>to define plugin mapping in the group</li>
   * </ol>
   *
   * @see ArtifactRepositoryMetadata
   * @see GroupRepositoryMetadata
   *
   * @since 2.0
   */
  @Mojo( name = "addPluginArtifactMetadata", defaultPhase = LifecyclePhase.PACKAGE, threadSafe = true )
  public class AddPluginArtifactMetadataMojo
      extends AbstractMojo
  {
      /**
       * The project artifact, which should have the <code>latest</code> metadata added to it.
       */
      @Parameter( defaultValue = "${project}", readonly = true )
      private MavenProject project;
  
      /**
       * The prefix for the plugin goal.
       */
      @Parameter
      private String goalPrefix;
  
      /**
       * Set this to "true" to skip invoking any goals or reports of the plugin.
       *
       * @since 2.8
       */
      @Parameter( defaultValue = "false", property = "maven.plugin.skip" )
      private boolean skip;
  
      /** {@inheritDoc} */
      @Override
      public void execute()
          throws MojoExecutionException
      {
          if ( skip )
          {
              getLog().warn( "Execution skipped" );
              return;
          }
          Artifact projectArtifact = project.getArtifact();
  
          Versioning versioning = new Versioning();
          versioning.setLatest( projectArtifact.getVersion() );
          versioning.updateTimestamp();
          ArtifactRepositoryMetadata metadata = new ArtifactRepositoryMetadata( projectArtifact, versioning );
          projectArtifact.addMetadata( metadata );
  
          GroupRepositoryMetadata groupMetadata = new GroupRepositoryMetadata( project.getGroupId() );
          groupMetadata.addPluginMapping( getGoalPrefix(), project.getArtifactId(), project.getName() );
  
          projectArtifact.addMetadata( groupMetadata );
      }
  
      /**
       * @return the goal prefix parameter or the goal prefix from the Plugin artifactId.
      */
     private String getGoalPrefix()
     {
         if ( goalPrefix == null )
         {
             goalPrefix = PluginDescriptor.getGoalPrefixFromArtifactId( project.getArtifactId() );
         }
 
         return goalPrefix;
     }
 }