package org.apache.maven.scm.provider.local.command.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.ScmFile;

 import org.apache.maven.scm.ScmFileSet;

 import org.apache.maven.scm.ScmFileStatus;

 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.local.command.LocalCommand;

 import org.apache.maven.scm.provider.local.command.changelog.LocalChangeLogCommand;

 import org.apache.maven.scm.provider.local.metadata.LocalScmMetadata;

 import org.apache.maven.scm.provider.local.metadata.LocalScmMetadataUtils;

 import org.apache.maven.scm.provider.local.repository.LocalScmProviderRepository;

 import org.codehaus.plexus.util.FileUtils;

 import java.io.File;

 import java.io.IOException;

 import java.util.ArrayList;

 import java.util.Iterator;

 import java.util.List;

 /**

  * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l</a>

  * @author Olivier Lamy

  * @version $Id: LocalUpdateCommand.java 1056980 2011-01-09 17:23:55Z olamy $

  */

 public class LocalUpdateCommand

     extends AbstractUpdateCommand

     implements LocalCommand

 {

     /** {@inheritDoc} */

     protected UpdateScmResult executeUpdateCommand( ScmProviderRepository repo, ScmFileSet fileSet, ScmVersion version )

         throws ScmException

     {

         LocalScmProviderRepository repository = (LocalScmProviderRepository) repo;

         if ( version != null )

         {

             throw new ScmException( "The local scm doesn't support tags." );

         }

         File root = new File( repository.getRoot() );

         String module = repository.getModule();

         File source = new File( root, module );

         File baseDestination = fileSet.getBasedir();

         if ( !baseDestination.exists() )

         {

             throw new ScmException(

                 "The working directory doesn't exist (" + baseDestination.getAbsolutePath() + ")." );

         }

         if ( !root.exists() )

         {

             throw new ScmException( "The base directory doesn't exist (" + root.getAbsolutePath() + ")." );

         }

         if ( !source.exists() )

         {

             throw new ScmException( "The module directory doesn't exist (" + source.getAbsolutePath() + ")." );

         }

         if ( !baseDestination.exists() && !baseDestination.isDirectory() )

         {

             throw new ScmException( "The destination directory isn't a directory or doesn't exist ("

                 + baseDestination.getAbsolutePath() + ")." );

         }

         List<ScmFile> updatedFiles;

         try

         {

             if ( getLogger().isInfoEnabled() )

             {

                 getLogger().info(

                                   "Updating '" + baseDestination.getAbsolutePath() + "' from '"

                                       + source.getAbsolutePath() + "'." );

             }

             @SuppressWarnings( "unchecked" )

             List<File> fileList = FileUtils.getFiles( source.getAbsoluteFile(), "**", null );

             List<File> list = fileList;

             updatedFiles = update( source, baseDestination, list );

             // process deletions in repository

             LocalScmMetadataUtils metadataUtils = new LocalScmMetadataUtils( getLogger() );

             LocalScmMetadata originalMetadata = metadataUtils.readMetadata( baseDestination );

             if ( originalMetadata != null )

             {

                 LocalScmMetadata newMetadata = metadataUtils.buildMetadata( source );

                 for ( Iterator<String> it = originalMetadata.getRepositoryFileNames().iterator(); it.hasNext(); )

                 {

                     String filename = it.next();

                     if ( !newMetadata.getRepositoryFileNames().contains( filename ) )

                     {

                         File localFile = new File( baseDestination, filename );

                         if ( localFile.exists() )

                         {

                             localFile.delete();

                             updatedFiles.add( new ScmFile( "/" + filename, ScmFileStatus.UPDATED ) );

                         }

                     }

                 }

             }

             // rewrite metadata file

             metadataUtils.writeMetadata( baseDestination, metadataUtils.buildMetadata( source ) );

         }

         catch ( IOException ex )

         {

             throw new ScmException( "Error while checking out the files.", ex );

         }

         return new LocalUpdateScmResult( null, updatedFiles );

     }

     private List<ScmFile> update( File source, File baseDestination, List<File> files )

         throws ScmException, IOException

     {

         String sourcePath = source.getAbsolutePath();

         List<ScmFile> updatedFiles = new ArrayList<ScmFile>();

         for ( Iterator<File> i = files.iterator(); i.hasNext(); )

         {

             File repositoryFile = i.next();

             File repositoryDirectory = repositoryFile.getParentFile();

             // TODO: Add more excludes here

             if ( repositoryDirectory != null && repositoryDirectory.getName().equals( "CVS" ) )

             {

                 continue;

             }

             String dest = repositoryFile.getAbsolutePath().substring( sourcePath.length() + 1 );

             File destinationFile = new File( baseDestination, dest );

             String repositoryFileContents = FileUtils.fileRead( repositoryFile );

             if ( destinationFile.exists() )

             {

                 String destionationFileContents = FileUtils.fileRead( destinationFile );

                 if ( repositoryFileContents.equals( destionationFileContents ) )

                 {

                     continue;

                 }

             }

             File destinationDirectory = destinationFile.getParentFile();

             if ( !destinationDirectory.exists() && !destinationDirectory.mkdirs() )

             {

                 throw new ScmException(

                     "Could not create destination directory '" + destinationDirectory.getAbsolutePath() + "'." );

             }

             ScmFileStatus status;

             if ( destinationFile.exists() )

             {

                 status = ScmFileStatus.UPDATED;

             }

             else

             {

                 status = ScmFileStatus.ADDED;

             }

             FileUtils.copyFileToDirectory( repositoryFile, destinationDirectory );

             int chop = baseDestination.getAbsolutePath().length();

             String fileName = "/" + destinationFile.getAbsolutePath().substring( chop + 1 );

             updatedFiles.add( new ScmFile( fileName, status ) );

         }

         return updatedFiles;

     }

     /** {@inheritDoc} */

     protected ChangeLogCommand getChangeLogCommand()

     {

         return new LocalChangeLogCommand();

     }

 }