package org.apache.maven.plugin.dependency;
   
   /*
    * 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.repository.ArtifactRepository;
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugin.MojoFailureException;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.codehaus.plexus.util.FileUtils;
  import org.codehaus.plexus.util.StringUtils;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  /**
   * Remove/purge artifacts from the local repository.
   * 
   * @version $Id: PurgeLocalRepositoryMojo.java 1400764 2012-10-22 05:31:26Z pgier $
   * @since 2.6
   */
  @Mojo( name = "manual-purge-local-repository", threadSafe = true, requiresProject = false )
  public class ManualPurgeLocalRepositoryMojo
      extends AbstractMojo
  {
  
      /**
       * The local repository, from which to delete artifacts.
       */
      @Parameter( defaultValue = "${localRepository}", readonly = true, required = true )
      private ArtifactRepository localRepository;
  
      /**
       * The list of artifacts in the form of groupId:artifactId:version which should be deleted/purged from the local
       * repository. To delete all versions for a specific artifact, leave the version empty (groupId:artifactId).
       * To delete all artifacts for a specific groupId, just provide the groupId by itself.
       */
      @Parameter
      private List<String> includes;
  
      /**
       * Comma-separated list of groupId:artifactId entries, which should be used to manually include artifacts for
       * deletion. This is a command-line alternative to the <code>manualIncludes</code> parameter, since List parameters
       * are not currently compatible with CLI specification.
       */
      @Parameter( property = "include" )
      private String include;
  
  
      public void execute()
          throws MojoExecutionException, MojoFailureException
      {
          if ( !StringUtils.isEmpty( include ) )
          {
              includes = this.parseIncludes( include );
          }
  
          if ( includes == null || includes.isEmpty() )
          {
              throw new MojoExecutionException( "Parameter manualIncludes must be specified" );
          }
  
          for ( String gavPattern : includes )
          {
              if ( StringUtils.isEmpty( gavPattern ) )
              {
                  getLog().debug( "Skipping empty gav pattern: " + gavPattern );
                  continue;
              }
  
              String relativePath = gavToPath( gavPattern );
              if ( StringUtils.isEmpty( relativePath ) )
              {
                  continue;
              }
  
              File purgeDir = new File( localRepository.getBasedir(), relativePath );
              if ( purgeDir.exists() )
             {
                 getLog().debug( "Deleting directory: " + purgeDir );
                 try
                 {
                     FileUtils.deleteDirectory( purgeDir );
                 }
                 catch ( IOException e )
                 {
                     throw new MojoExecutionException( "Unable to purge directory: " + purgeDir );
                 }
             }
         }
     }
 
     /**
      * Convert a groupId:artifactId:version to a file system path
      * 
      * @param gav, the groupId:artifactId:version string
      * @return
      */
     private String gavToPath( String gav )
     {
         if ( StringUtils.isEmpty( gav ) )
         {
             return null;
         }
         
         String[] pathComponents = gav.split( ":" );
 
         StringBuffer path = new StringBuffer( pathComponents[0].replace( '.', '/' ) );
         
         for ( int i=1; i<pathComponents.length; ++i )
         {
             path.append( "/" +  pathComponents[i] );
         }
 
         return path.toString();
     }
 
     /**
      * Convert comma separated list of includes to List object
      * 
      * @param include
      * @return the includes list
      */
     private List<String> parseIncludes( String include )
     {
         List<String> includes = new ArrayList<String>();
 
         if ( include != null )
         {
             String[] elements = include.split( "," );
             includes.addAll( Arrays.asList( elements ) );
         }
 
         return includes;
     }
 
 }