package org.apache.maven.scm.provider.hg.command.checkout;
   
   /*
    * 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.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmResult;
  import org.apache.maven.scm.ScmVersion;
  import org.apache.maven.scm.command.Command;
  import org.apache.maven.scm.command.checkout.AbstractCheckOutCommand;
  import org.apache.maven.scm.command.checkout.CheckOutScmResult;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.hg.HgUtils;
  import org.apache.maven.scm.provider.hg.command.HgCommandConstants;
  import org.apache.maven.scm.provider.hg.command.HgConsumer;
  import org.apache.maven.scm.provider.hg.repository.HgScmProviderRepository;
  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.List;
  
  /**
   * @author <a href="mailto:thurner.rupert@ymono.net">thurner rupert</a>
   * @author Olivier Lamy
   *
   */
  public class HgCheckOutCommand
      extends AbstractCheckOutCommand
      implements Command
  {
      /**
       * {@inheritDoc}
       */
      protected CheckOutScmResult executeCheckOutCommand( ScmProviderRepository repo, ScmFileSet fileSet,
                                                          ScmVersion scmVersion, boolean recursive )
          throws ScmException
      {
          HgScmProviderRepository repository = (HgScmProviderRepository) repo;
          String url = repository.getURI();
  
          File checkoutDir = fileSet.getBasedir();
          try
          {
              if ( getLogger().isInfoEnabled() )
              {
                  getLogger().info( "Removing " + checkoutDir );
              }
              FileUtils.deleteDirectory( checkoutDir );
          }
          catch ( IOException e )
          {
              throw new ScmException( "Cannot remove " + checkoutDir );
          }
  
          // Do the actual checkout
          List<String> cmdList = new ArrayList<String>();
          if ( repo.isPushChanges() )
          {
              cmdList.add( HgCommandConstants.CLONE_CMD );
          }
          else
          {
              cmdList.add( HgCommandConstants.UPDATE_CMD );
          }
          if ( scmVersion != null && !StringUtils.isEmpty( scmVersion.getName() ) )
          {
              cmdList.add( HgCommandConstants.REVISION_OPTION );
              cmdList.add( scmVersion.getName() );
          }
          if ( !repo.isPushChanges() )
          {
              cmdList.add( HgCommandConstants.CLEAN_OPTION );
          }
          cmdList.add( url );
          cmdList.add( checkoutDir.getAbsolutePath() );
          String[] checkoutCmd = cmdList.toArray( new String[0] );
          HgConsumer checkoutConsumer = new HgConsumer( getLogger() );
          HgUtils.execute( checkoutConsumer, getLogger(), checkoutDir.getParentFile(), checkoutCmd );
  
         // Do inventory to find list of checkedout files
         String[] inventoryCmd = new String[]{ HgCommandConstants.INVENTORY_CMD };
         HgCheckOutConsumer consumer = new HgCheckOutConsumer( getLogger(), checkoutDir );
         ScmResult result = HgUtils.execute( consumer, getLogger(), checkoutDir, inventoryCmd );
 
         return new CheckOutScmResult( consumer.getCheckedOutFiles(), result );
     }
 }