package org.apache.maven.scm.provider.svn.svnexe.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.ScmVersion;
  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.svn.command.SvnCommand;
  import org.apache.maven.scm.provider.svn.command.diff.SvnDiffConsumer;
  import org.apache.maven.scm.provider.svn.repository.SvnScmProviderRepository;
  import org.apache.maven.scm.provider.svn.svnexe.command.SvnCommandLineUtils;
  import org.codehaus.plexus.util.Os;
  import org.codehaus.plexus.util.StringUtils;
  import org.codehaus.plexus.util.cli.CommandLineException;
  import org.codehaus.plexus.util.cli.CommandLineUtils;
  import org.codehaus.plexus.util.cli.Commandline;
  
  import java.io.File;
  
  /**
   * @author <a href="mailto:brett@apache.org">Brett Porter</a>
   * @author Olivier Lamy
   *
   */
  public class SvnDiffCommand
      extends AbstractDiffCommand
      implements SvnCommand
  {
      /** {@inheritDoc} */
      protected DiffScmResult executeDiffCommand( ScmProviderRepository repo, ScmFileSet fileSet, ScmVersion startVersion,
                                                  ScmVersion endVersion )
          throws ScmException
      {
          Commandline cl =
              createCommandLine( (SvnScmProviderRepository) repo, fileSet.getBasedir(), startVersion, endVersion );
  
          SvnDiffConsumer consumer = new SvnDiffConsumer( getLogger(), fileSet.getBasedir() );
  
          CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();
  
          if ( getLogger().isInfoEnabled() )
          {
              getLogger().info( "Executing: " + SvnCommandLineUtils.cryptPassword( cl ) );
  
              if ( Os.isFamily( Os.FAMILY_WINDOWS ) )
              {
                  getLogger().info( "Working directory: " + cl.getWorkingDirectory().getAbsolutePath() );
              }
          }
  
          int exitCode;
  
          try
          {
              exitCode = SvnCommandLineUtils.execute( cl, consumer, stderr, getLogger() );
          }
          catch ( CommandLineException ex )
          {
              throw new ScmException( "Error while executing command.", ex );
          }
  
          if ( exitCode != 0 )
          {
              return new DiffScmResult( cl.toString(), "The svn command failed.", stderr.getOutput(), false );
          }
  
          return new DiffScmResult( cl.toString(), consumer.getChangedFiles(), consumer.getDifferences(),
                                    consumer.getPatch() );
      }
  
      // ----------------------------------------------------------------------
      //
      // ----------------------------------------------------------------------
  
      public static Commandline createCommandLine( SvnScmProviderRepository repository, File workingDirectory,
                                                   ScmVersion startVersion, ScmVersion endVersion )
      {
          Commandline cl = SvnCommandLineUtils.getBaseSvnCommandLine( workingDirectory, repository );
  
         cl.createArg().setValue( "diff" );
 
         if ( startVersion != null && StringUtils.isNotEmpty( startVersion.getName() ) )
         {
             cl.createArg().setValue( "-r" );
 
             if ( endVersion != null && StringUtils.isNotEmpty( endVersion.getName() ) )
             {
                 cl.createArg().setValue( startVersion.getName() + ":" + endVersion.getName() );
             }
             else
             {
                 cl.createArg().setValue( startVersion.getName() );
             }
         }
 
         return cl;
     }
 }