package org.apache.maven.scm.provider.hg.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.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.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.command.changelog.HgChangeLogCommand;

 import org.apache.maven.scm.provider.hg.command.diff.HgDiffConsumer;

 import org.codehaus.plexus.util.StringUtils;

 /**

  * @author <a href="mailto:thurner.rupert@ymono.net">thurner rupert</a>

  * @author Olivier Lamy

  * @version $Id: HgUpdateCommand.java 1207290 2011-11-28 15:20:44Z olamy $

  */

 public class HgUpdateCommand

     extends AbstractUpdateCommand

     implements Command

 {

     /** {@inheritDoc} */

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

         throws ScmException

     {

         File workingDir = fileSet.getBasedir();

         String[] updateCmd;

         // Update branch

         if (repo.isPushChanges()) {

             updateCmd = new String[] {

                     HgCommandConstants.PULL_CMD,

                     HgCommandConstants.REVISION_OPTION,

                     tag != null && !StringUtils.isEmpty( tag.getName() ) ? tag.getName() : "tip" };

         } else {

             updateCmd = new String[] {

                     HgCommandConstants.UPDATE_CMD,

                     tag != null && !StringUtils.isEmpty( tag.getName() ) ? tag.getName() : "tip",

                     HgCommandConstants.CLEAN_OPTION };

         }

         ScmResult updateResult = HgUtils.execute( new HgConsumer( getLogger() ), getLogger(), workingDir, updateCmd );

         if ( !updateResult.isSuccess() )

         {

             return new UpdateScmResult( null, null, updateResult );

         }

         // Find changes from last revision

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

         int previousRevision = currentRevision - 1;

         String[] diffCmd = new String[] {

             HgCommandConstants.DIFF_CMD,

             HgCommandConstants.REVISION_OPTION,

             "" + previousRevision };

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

         ScmResult diffResult = HgUtils.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 ( ScmFile file : diffFiles )

         {

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

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

             {

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

             }

             else

             {

                 updatedFiles.add( file );

             }

         }

         if ( repo.isPushChanges() ) {

                 String[] hgUpdateCmd = new String[] { HgCommandConstants.UPDATE_CMD };

                 HgUtils.execute( new HgConsumer( getLogger() ), getLogger(), workingDir, hgUpdateCmd );

         }

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

     }

     protected ChangeLogCommand getChangeLogCommand()

     {

         HgChangeLogCommand command = new HgChangeLogCommand();

         command.setLogger( getLogger() );

         return command;

     }

 }