package org.apache.maven.scm.provider.perforce.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.perforce.PerforceScmProvider;

 import org.apache.maven.scm.provider.perforce.command.PerforceCommand;

 import org.apache.maven.scm.provider.perforce.repository.PerforceScmProviderRepository;

 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 Mike Perham

  * @version $Id: PerforceDiffCommand.java 1306867 2012-03-29 13:45:10Z olamy $

  */

 public class PerforceDiffCommand

     extends AbstractDiffCommand

     implements PerforceCommand

 {

     /** {@inheritDoc} */

     protected DiffScmResult executeDiffCommand( ScmProviderRepository repo, ScmFileSet files, ScmVersion startRev,

                                                 ScmVersion endRev )

         throws ScmException

     {

         Commandline cl =

             createCommandLine( (PerforceScmProviderRepository) repo, files.getBasedir(), startRev, endRev );

         PerforceDiffConsumer consumer = new PerforceDiffConsumer();

         if ( getLogger().isInfoEnabled() )

         {

             getLogger().info( "Executing: " + PerforceScmProvider.clean( cl.toString() ) );

         }

         boolean success = false;

         try

         {

             CommandLineUtils.StringStreamConsumer err = new CommandLineUtils.StringStreamConsumer();

             int exitCode = CommandLineUtils.executeCommandLine( cl, consumer, err );

             if ( exitCode != 0 )

             {

                 String cmdLine = CommandLineUtils.toString( cl.getCommandline() );

                 StringBuilder msg = new StringBuilder( "Exit code: " + exitCode + " - " + err.getOutput() );

                 msg.append( '\n' );

                 msg.append( "Command line was:" + cmdLine );

                 throw new CommandLineException( msg.toString() );

             }

         }

         catch ( CommandLineException e )

         {

             if ( getLogger().isErrorEnabled() )

             {

                 getLogger().error( "CommandLineException " + e.getMessage(), e );

             }

         }

         return new DiffScmResult( cl.toString(), success ? "Diff successful" : "Unable to diff", consumer

             .getOutput(), success );

     }

     public static Commandline createCommandLine( PerforceScmProviderRepository repo, File workingDirectory,

                                                  ScmVersion startRev, ScmVersion endRev )

     {

         String start = startRev != null && StringUtils.isNotEmpty( startRev.getName() ) ? "@" + startRev.getName() : "";

         String end = endRev != null && StringUtils.isNotEmpty( endRev.getName() ) ? endRev.getName() : "now";

         Commandline command = PerforceScmProvider.createP4Command( repo, workingDirectory );

         command.createArg().setValue( "diff2" );

         command.createArg().setValue( "-u" );

         // I'm assuming the "revs" are actually labels

         command.createArg().setValue( "..." + start );

         command.createArg().setValue( "...@" + end );

         return command;

     }

 }