package org.apache.maven.scm.provider.hg.command.diff;

 /*

  * 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.diff.AbstractDiffCommand;

 import org.apache.maven.scm.command.diff.DiffScmResult;

 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.codehaus.plexus.util.StringUtils;

 /**

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

  * @version $Id: HgDiffCommand.java 686566 2008-08-16 21:52:46Z olamy $

  */

 public class HgDiffCommand

     extends AbstractDiffCommand

     implements Command

 {

     /** {@inheritDoc} */

     protected DiffScmResult executeDiffCommand( ScmProviderRepository repo, ScmFileSet fileSet,

                                                 ScmVersion startRevision, ScmVersion endRevision )

         throws ScmException

     {

         String[] diffCmd;

         if ( startRevision != null && !StringUtils.isEmpty( startRevision.getName() ) )

         {

             String revArg = startRevision.getName();

             if ( endRevision != null && !StringUtils.isEmpty( endRevision.getName() ) )

             {

                 revArg += ".." + endRevision;

             }

             diffCmd = new String[] { HgCommandConstants.DIFF_CMD, HgCommandConstants.REVISION_OPTION, revArg };

         }

         else

         {

             diffCmd = new String[] { HgCommandConstants.DIFF_CMD };

         }

         diffCmd = HgUtils.expandCommandLine( diffCmd, fileSet );

         HgDiffConsumer consumer = new HgDiffConsumer( getLogger(), fileSet.getBasedir() );

         ScmResult result = HgUtils.execute( consumer, getLogger(), fileSet.getBasedir(), diffCmd );

         return new DiffScmResult( consumer.getChangedFiles(), consumer.getDifferences(), consumer.getPatch(), result );

     }

 }