package org.apache.maven.scm.plugin;

 import org.apache.maven.plugin.MojoExecutionException;

 import org.apache.maven.project.MavenProject;

 import org.apache.maven.scm.ScmException;

 import org.apache.maven.scm.command.update.UpdateScmResult;

 import org.apache.maven.scm.command.update.UpdateScmResultWithRevision;

 import org.apache.maven.scm.repository.ScmRepository;

 import java.io.IOException;

 /*

  * 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.

  */

 /**

  * @goal update-subprojects

  * @description Updates all projects in a multi project build. This is useful for users who have adopted the flat project structure where the aggregator project is a sibling of the sub projects rather than sitting in the parent directory.

  */

 public class UpdateSubprojectsMojo

     extends AbstractScmMojo

 {

     /**

      * The version type (branch/tag/revision) of scmVersion.

      *

      * @parameter expression="${scmVersionType}"

      */

     private String scmVersionType;

     /**

      * The version (revision number/branch name/tag name).

      *

      * @parameter expression="${scmVersion}"

      */

     private String scmVersion;

     /**

      * The project property where to store the revision name.

      *

      * @parameter expression="${revisionKey}" default-value="scm.revision"

      */

     private String revisionKey;

     /**

      * The maven project.

      *

      * @parameter expression="${project}"

      * @required

      * @readonly

      */

     private MavenProject project;

     public void execute()

         throws MojoExecutionException

     {

         super.execute();

         try

         {

             ScmRepository repository = getScmRepository();

             UpdateScmResult result =

                 getScmManager().update( repository, getFileSet(), getScmVersion( scmVersionType, scmVersion ) );

             checkResult( result );

             if ( result instanceof UpdateScmResultWithRevision )

             {

                 getLog().info( "Storing revision in '" + revisionKey + "' project property." );

                 if ( project.getProperties() != null ) // Remove the test when we'll use plugin-test-harness 1.0-alpha-2

                 {

                     project.getProperties().put( revisionKey, ( (UpdateScmResultWithRevision) result ).getRevision() );

                 }

             }

         }

         catch ( IOException e )

         {

             throw new MojoExecutionException( "Cannot run update command : ", e );

         }

         catch ( ScmException e )

         {

             throw new MojoExecutionException( "Cannot run update command : ", e );

         }

     }

 }