package org.apache.maven.scm.provider.integrity.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.ScmFile;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.ScmResult;
  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.integrity.APISession;
  import org.apache.maven.scm.provider.integrity.repository.IntegrityScmProviderRepository;
  import org.codehaus.plexus.util.cli.CommandLineException;
  import org.codehaus.plexus.util.cli.CommandLineUtils;
  import org.codehaus.plexus.util.cli.Commandline;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  
  /**
   * MKS Integrity implementation for Maven's AbstractDiffCommand
   * <br>Since MKS Integrity doesn't have a notion of arbitrarily differencing
   * by a revision across the sandbox, this command will difference the
   * current Sandbox working file against the server version.
   *
   * @author <a href="mailto:cletus@mks.com">Cletus D'Souza</a>
   * @since 1.6
   */
  public class IntegrityDiffCommand
      extends AbstractDiffCommand
  {
      /**
       * Since we can't arbitrarily apply the same start and end revisions to all files in the sandbox,
       * this command will be adapted to show differences between the local version and the repository
       */
      @Override
      public DiffScmResult executeDiffCommand( ScmProviderRepository repository, ScmFileSet fileSet,
                                               ScmVersion startRevision, ScmVersion endRevision )
          throws ScmException
      {
          DiffScmResult result;
          IntegrityScmProviderRepository iRepo = (IntegrityScmProviderRepository) repository;
          APISession api = iRepo.getAPISession();
          getLogger().info( "Showing differences bettween local files in " + fileSet.getBasedir().getAbsolutePath()
                                + " and server project " + iRepo.getConfigruationPath() );
  
          // Since the si diff command is not completely API ready, we will use the CLI for this command
          Commandline shell = new Commandline();
          shell.setWorkingDirectory( fileSet.getBasedir() );
          shell.setExecutable( "si" );
          shell.createArg().setValue( "diff" );
          shell.createArg().setValue( "--hostname=" + api.getHostName() );
          shell.createArg().setValue( "--port=" + api.getPort() );
          shell.createArg().setValue( "--user=" + api.getUserName() );
          shell.createArg().setValue( "-R" );
          shell.createArg().setValue( "--filter=changed:all" );
          shell.createArg().setValue( "--filter=format:text" );
          IntegrityDiffConsumer shellConsumer = new IntegrityDiffConsumer( getLogger() );
          String commandLine = CommandLineUtils.toString( shell.getCommandline() );
  
          try
          {
              getLogger().debug( "Executing: " + commandLine );
              int exitCode = CommandLineUtils.executeCommandLine( shell, shellConsumer,
                                                                  new CommandLineUtils.StringStreamConsumer() );
              boolean success = ( exitCode == 128 ? false : true );
              ScmResult scmResult = new ScmResult( commandLine, "", "Exit Code: " + exitCode, success );
              // Since we can't really parse the differences output, we'll just have to go by the command output
              // Returning a DiffScmResult(List changedFiles, Map differences, String patch, ScmResult result) to avoid
              // a NPE in org.codehaus.plexus.util.FileUtils.fileWrite(FileUtils.java:426)
              return new DiffScmResult( new ArrayList<ScmFile>(), new HashMap<String, CharSequence>(), "", scmResult );
  
          }
          catch ( CommandLineException cle )
          {
              getLogger().error( "Command Line Exception: " + cle.getMessage() );
              result = new DiffScmResult( commandLine, cle.getMessage(), "", false );
          }
  
          return result;
     }
 
 }