package org.apache.maven.scm.plugin;
   
   /*
    * 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 java.io.File;
  import java.io.IOException;
  
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmResult;
  import org.apache.maven.scm.repository.ScmRepository;
  import org.codehaus.plexus.util.FileUtils;
  
  /**
   * Get a fresh copy of the latest source from the configured scm url.
   *
   * @author <a href="evenisse@apache.org">Emmanuel Venisse</a>
   */
  @Mojo( name = "checkout", requiresProject = false )
  public class CheckoutMojo
      extends AbstractScmMojo
  {
      /**
       * Use Export instead of checkout
       */
      @Parameter( property = "useExport", defaultValue = "false" )
      private boolean useExport;
  
      /**
       * The directory to checkout the sources to for the bootstrap and checkout goals.
       */
      @Parameter( property = "checkoutDirectory", defaultValue = "${project.build.directory}/checkout" )
      private File checkoutDirectory;
  
      /**
       * Skip checkout if checkoutDirectory exists.
       */
      @Parameter( property = "skipCheckoutIfExists", defaultValue = "false" )
      private boolean skipCheckoutIfExists = false;
  
      /**
       * The version type (branch/tag/revision) of scmVersion.
       */
      @Parameter( property = "scmVersionType" )
      private String scmVersionType;
  
      /**
       * The version (revision number/branch name/tag name).
       */
      @Parameter( property = "scmVersion" )
      private String scmVersion;
  
      /**
       * allow extended mojo (ie BootStrap ) to see checkout result
       */
      private ScmResult checkoutResult;
  
      /** {@inheritDoc} */
      public void execute()
          throws MojoExecutionException
      {
          super.execute();
  
          //skip checkout if checkout directory is already created. See SCM-201
          checkoutResult = null;
          if ( !getCheckoutDirectory().isDirectory() || !this.skipCheckoutIfExists )
          {
              checkoutResult = checkout();
          }
      }
  
      protected File getCheckoutDirectory()
      {
          if ( this.checkoutDirectory.getPath().contains( "${project.basedir}" ) )
          {
              //project.basedir is not set under maven 3.x when run without a project
              this.checkoutDirectory = new File( this.getBasedir(), "target/checkout" );
          }
          return this.checkoutDirectory;
     }
 
     public void setCheckoutDirectory( File checkoutDirectory )
     {
         this.checkoutDirectory = checkoutDirectory;
     }
 
     protected ScmResult checkout()
         throws MojoExecutionException
     {
         try
         {
             ScmRepository repository = getScmRepository();
 
             this.prepareOutputDirectory( getCheckoutDirectory() );
 
             ScmResult result = null;
 
             ScmFileSet fileSet = new ScmFileSet( getCheckoutDirectory().getAbsoluteFile() );
             if ( useExport )
             {
                 result = getScmManager().export( repository, fileSet, getScmVersion( scmVersionType, scmVersion ) );
             }
             else
             {
                 result = getScmManager().checkOut( repository, fileSet, getScmVersion( scmVersionType, scmVersion ) );
             }
 
             checkResult( result );
 
             handleExcludesIncludesAfterCheckoutAndExport( this.checkoutDirectory );
 
             return result;
         }
         catch ( ScmException e )
         {
             throw new MojoExecutionException( "Cannot run checkout command : ", e );
         }
     }
 
     private void prepareOutputDirectory( File ouputDirectory )
         throws MojoExecutionException
     {
         try
         {
             this.getLog().info( "Removing " + ouputDirectory );
 
             FileUtils.deleteDirectory( getCheckoutDirectory() );
         }
         catch ( IOException e )
         {
             throw new MojoExecutionException( "Cannot remove " + ouputDirectory );
         }
 
         if ( !getCheckoutDirectory().mkdirs() )
         {
             throw new MojoExecutionException( "Cannot create " + ouputDirectory );
         }
     }
 
     protected ScmResult getCheckoutResult()
     {
         return checkoutResult;
     }
 
 
 }