001    package org.apache.maven.scm.provider.cvslib.cvsexe.command.diff;
002    
003    /*
004     * Licensed to the Apache Software Foundation (ASF) under one
005     * or more contributor license agreements.  See the NOTICE file
006     * distributed with this work for additional information
007     * regarding copyright ownership.  The ASF licenses this file
008     * to you under the Apache License, Version 2.0 (the
009     * "License"); you may not use this file except in compliance
010     * with the License.  You may obtain a copy of the License at
011     *
012     * http://www.apache.org/licenses/LICENSE-2.0
013     *
014     * Unless required by applicable law or agreed to in writing,
015     * software distributed under the License is distributed on an
016     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017     * KIND, either express or implied.  See the License for the
018     * specific language governing permissions and limitations
019     * under the License.
020     */
021    
022    import org.apache.maven.scm.ScmException;
023    import org.apache.maven.scm.command.diff.DiffScmResult;
024    import org.apache.maven.scm.provider.cvslib.command.diff.AbstractCvsDiffCommand;
025    import org.apache.maven.scm.provider.cvslib.command.diff.CvsDiffConsumer;
026    import org.codehaus.plexus.util.cli.CommandLineException;
027    import org.codehaus.plexus.util.cli.CommandLineUtils;
028    import org.codehaus.plexus.util.cli.Commandline;
029    
030    /**
031     * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
032     *
033     */
034    public class CvsExeDiffCommand
035        extends AbstractCvsDiffCommand
036    {
037        /** {@inheritDoc} */
038        protected DiffScmResult executeCvsCommand( Commandline cl )
039            throws ScmException
040        {
041            CvsDiffConsumer consumer = new CvsDiffConsumer( getLogger(), cl.getWorkingDirectory() );
042    
043            CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();
044    
045    
046            try
047            {
048                CommandLineUtils.executeCommandLine( cl, consumer, stderr );
049            }
050            catch ( CommandLineException ex )
051            {
052                throw new ScmException( "Error while executing command.", ex );
053            }
054    
055    // TODO: a difference returns a code of "1", as does errors. How to tell the difference?
056    //        if ( exitCode != 0 )
057    //        {
058    //            return new DiffScmResult( cl.toString(), "The cvs command failed.", stderr.getOutput(), false );
059    //        }
060    
061            return new DiffScmResult( cl.toString(), consumer.getChangedFiles(), consumer.getDifferences(),
062                                      consumer.getPatch() );
063    
064        }
065    }