package org.apache.maven.scm.provider.vss.commands.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 org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmVersion;
  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.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.vss.commands.VssCommandLineUtils;
  import org.apache.maven.scm.provider.vss.commands.VssConstants;
  import org.apache.maven.scm.provider.vss.commands.changelog.VssHistoryCommand;
  import org.apache.maven.scm.provider.vss.repository.VssScmProviderRepository;
  import org.codehaus.plexus.util.cli.CommandLineUtils;
  import org.codehaus.plexus.util.cli.Commandline;
  
  /**
   * @author <a href="mailto:triek@thrx.de">Thorsten Riek</a>
   *
   */
  public class VssUpdateCommand
      extends AbstractUpdateCommand
  {
      // TODO handle deleted files from VSS
      /** {@inheritDoc} */
      protected UpdateScmResult executeUpdateCommand( ScmProviderRepository repository, ScmFileSet fileSet,
                                                      ScmVersion version )
          throws ScmException
      {
          if ( getLogger().isDebugEnabled() )
          {
              getLogger().debug( "executing update command..." );
          }
  
          VssScmProviderRepository repo = (VssScmProviderRepository) repository;
  
          Commandline cl = buildCmdLine( repo, fileSet, version );
  
          VssUpdateConsumer consumer = new VssUpdateConsumer( repo, getLogger() );
  
          // TODO handle deleted files from VSS
          // TODO identify local files
          CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();
  
          int exitCode;
  
          if ( getLogger().isDebugEnabled() )
          {
              getLogger().debug( "Executing: " + cl.getWorkingDirectory().getAbsolutePath() + ">>" + cl.toString() );
          }
  
          exitCode = VssCommandLineUtils.executeCommandline( cl, consumer, stderr, getLogger() );
  
          if ( exitCode != 0 )
          {
              String error = stderr.getOutput();
  
              if ( getLogger().isDebugEnabled() )
              {
                  getLogger().debug( "VSS returns error: [" + error + "] return code: [" + exitCode + "]" );
              }
              if ( error.indexOf( "A writable copy of" ) < 0 )
              {
                  return new UpdateScmResult( cl.toString(), "The vss command failed.", error, false );
              }
              // print out the writable copy for manual handling
              if ( getLogger().isWarnEnabled() )
              {
                  getLogger().warn( error );
              }
          }
  
          return new UpdateScmResult( cl.toString(), consumer.getUpdatedFiles() );
      }
  
      public Commandline buildCmdLine( VssScmProviderRepository repo, ScmFileSet fileSet, ScmVersion version )
          throws ScmException
      {
  
         Commandline command = new Commandline();
 
         command.setWorkingDirectory( fileSet.getBasedir().getAbsolutePath() );
 
         try
         {
             command.addSystemEnvironment();
         }
         catch ( Exception e )
         {
             throw new ScmException( "Can't add system environment.", e );
         }
 
         command.addEnvironment( "SSDIR", repo.getVssdir() );
 
         String ssDir = VssCommandLineUtils.getSsDir();
 
         command.setExecutable( ssDir + VssConstants.SS_EXE );
 
         command.createArg().setValue( VssConstants.COMMAND_GET );
 
         command.createArg().setValue( VssConstants.PROJECT_PREFIX + repo.getProject() );
 
         //User identification to get access to vss repository
         if ( repo.getUserPassword() != null )
         {
             command.createArg().setValue( VssConstants.FLAG_LOGIN + repo.getUserPassword() );
         }
 
         //Display the history of an entire project list
         command.createArg().setValue( VssConstants.FLAG_RECURSION );
 
         //Ignore: Do not ask for input under any circumstances.
         command.createArg().setValue( VssConstants.FLAG_AUTORESPONSE_DEF );
 
         // FIXME Update command only works if there is no file checked out
         // or no file is dirty locally. It's better than overwriting
         // checked out files
         //Ignore: Do not touch local writable files.
         command.createArg().setValue( VssConstants.FLAG_SKIP_WRITABLE );
 
         if ( version != null )
         {
             command.createArg().setValue( VssConstants.FLAG_VERSION_LABEL + version );
         }
 
         return command;
     }
 
     /** {@inheritDoc} */
     protected ChangeLogCommand getChangeLogCommand()
     {
         VssHistoryCommand command = new VssHistoryCommand();
 
         command.setLogger( getLogger() );
 
         return command;
     }
 
 }