package org.apache.maven.scm.provider.bazaar.command.update;

 /*

  * 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.util.ArrayList;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

 import org.apache.maven.scm.ChangeSet;

 import org.apache.maven.scm.ScmException;

 import org.apache.maven.scm.ScmFile;

 import org.apache.maven.scm.ScmFileSet;

 import org.apache.maven.scm.ScmFileStatus;

 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.changelog.ChangeLogCommand;

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

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

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

 import org.apache.maven.scm.provider.ScmProviderRepository;

 import org.apache.maven.scm.provider.bazaar.BazaarUtils;

 import org.apache.maven.scm.provider.bazaar.command.BazaarConstants;

 import org.apache.maven.scm.provider.bazaar.command.BazaarConsumer;

 import org.apache.maven.scm.provider.bazaar.command.changelog.BazaarChangeLogCommand;

 import org.apache.maven.scm.provider.bazaar.command.diff.BazaarDiffConsumer;

 import org.codehaus.plexus.util.StringUtils;

 /**

  * @author <a href="mailto:torbjorn@smorgrav.org">Torbj�rn Eikli Sm�rgrav</a>

  * @version $Id: BazaarUpdateCommand.java 1056980 2011-01-09 17:23:55Z olamy $

  */

 public class BazaarUpdateCommand

     extends AbstractUpdateCommand

     implements Command

 {

     /** {@inheritDoc} */

     protected UpdateScmResult executeUpdateCommand( ScmProviderRepository repo, ScmFileSet fileSet, ScmVersion version )

         throws ScmException

     {

         if ( version != null && StringUtils.isNotEmpty( version.getName() ) )

         {

             throw new ScmException( "This provider can't handle tags." );

         }

         File workingDir = fileSet.getBasedir();

         // Update branch

         String[] updateCmd = new String[] { BazaarConstants.PULL_CMD };

         ScmResult updateResult = BazaarUtils.execute( new BazaarConsumer( getLogger() ), getLogger(), workingDir,

                                                       updateCmd );

         if ( !updateResult.isSuccess() )

         {

             return new UpdateScmResult( null, null, updateResult );

         }

         // Find changes from last revision

         int currentRevision = BazaarUtils.getCurrentRevisionNumber( getLogger(), workingDir );

         int previousRevision = currentRevision - 1;

         String[] diffCmd =

             new String[] { BazaarConstants.DIFF_CMD, BazaarConstants.REVISION_OPTION, "" + previousRevision };

         BazaarDiffConsumer diffConsumer = new BazaarDiffConsumer( getLogger(), workingDir );

         ScmResult diffResult = BazaarUtils.execute( diffConsumer, getLogger(), workingDir, diffCmd );

         // Now translate between diff and update file status

         List<ScmFile> updatedFiles = new ArrayList<ScmFile>();

         List<CharSequence> changes = new ArrayList<CharSequence>();

         List<ScmFile> diffFiles = diffConsumer.getChangedFiles();

         Map<String, CharSequence> diffChanges = diffConsumer.getDifferences();

         for ( Iterator<ScmFile> it = diffFiles.iterator(); it.hasNext(); )

         {

             ScmFile file = it.next();

             changes.add( diffChanges.get( file ) );

             if ( file.getStatus() == ScmFileStatus.MODIFIED )

             {

                 updatedFiles.add( new ScmFile( file.getPath(), ScmFileStatus.PATCHED ) );

             }

             else

             {

                 updatedFiles.add( file );

             }

         }

         return new UpdateScmResultWithRevision( updatedFiles, new ArrayList<ChangeSet>(0), String.valueOf( currentRevision ), diffResult );

     }

     /** {@inheritDoc} */

     protected ChangeLogCommand getChangeLogCommand()

     {

         BazaarChangeLogCommand command = new BazaarChangeLogCommand();

         command.setLogger( getLogger() );

         return command;

     }

 }