001package org.apache.maven.scm.provider.hg.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
022import org.apache.maven.scm.ScmException;
023import org.apache.maven.scm.ScmFileSet;
024import org.apache.maven.scm.ScmResult;
025import org.apache.maven.scm.ScmVersion;
026import org.apache.maven.scm.command.Command;
027import org.apache.maven.scm.command.diff.AbstractDiffCommand;
028import org.apache.maven.scm.command.diff.DiffScmResult;
029import org.apache.maven.scm.provider.ScmProviderRepository;
030import org.apache.maven.scm.provider.hg.HgUtils;
031import org.apache.maven.scm.provider.hg.command.HgCommandConstants;
032import org.codehaus.plexus.util.StringUtils;
033
034/**
035 * @author <a href="mailto:thurner.rupert@ymono.net">thurner rupert</a>
036 *
037 */
038public class HgDiffCommand
039    extends AbstractDiffCommand
040    implements Command
041{
042    /** {@inheritDoc} */
043    protected DiffScmResult executeDiffCommand( ScmProviderRepository repo, ScmFileSet fileSet,
044                                                ScmVersion startRevision, ScmVersion endRevision )
045        throws ScmException
046    {
047        String[] diffCmd;
048        if ( startRevision != null && !StringUtils.isEmpty( startRevision.getName() ) )
049        {
050            String revArg = startRevision.getName();
051            if ( endRevision != null && !StringUtils.isEmpty( endRevision.getName() ) )
052            {
053                revArg += ".." + endRevision;
054            }
055            diffCmd = new String[] { HgCommandConstants.DIFF_CMD, HgCommandConstants.REVISION_OPTION, revArg };
056        }
057        else
058        {
059            diffCmd = new String[] { HgCommandConstants.DIFF_CMD };
060        }
061
062        diffCmd = HgUtils.expandCommandLine( diffCmd, fileSet );
063        HgDiffConsumer consumer = new HgDiffConsumer( getLogger(), fileSet.getBasedir() );
064
065        ScmResult result = HgUtils.execute( consumer, getLogger(), fileSet.getBasedir(), diffCmd );
066
067        return new DiffScmResult( consumer.getChangedFiles(), consumer.getDifferences(), consumer.getPatch(), result );
068    }
069}