package org.apache.maven.shared.release.phase;
   
   /*
    * 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.project.MavenProject;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFile;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.command.status.StatusScmResult;
  import org.apache.maven.scm.manager.NoSuchScmProviderException;
  import org.apache.maven.scm.provider.ScmProvider;
  import org.apache.maven.scm.repository.ScmRepository;
  import org.apache.maven.scm.repository.ScmRepositoryException;
  import org.apache.maven.shared.release.ReleaseExecutionException;
  import org.apache.maven.shared.release.ReleaseFailureException;
  import org.apache.maven.shared.release.ReleaseResult;
  import org.apache.maven.shared.release.config.ReleaseDescriptor;
  import org.apache.maven.shared.release.env.ReleaseEnvironment;
  import org.apache.maven.shared.release.scm.ReleaseScmCommandException;
  import org.apache.maven.shared.release.scm.ReleaseScmRepositoryException;
  import org.apache.maven.shared.release.scm.ScmRepositoryConfigurator;
  import org.apache.maven.shared.release.scm.ScmTranslator;
  import org.codehaus.plexus.util.SelectorUtils;
  import org.codehaus.plexus.util.StringUtils;
  
  import java.io.File;
  import java.util.Arrays;
  import java.util.HashSet;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  /**
   * See if there are any local modifications to the files before proceeding with SCM operations and the release.
   * 
   * @author <a href="mailto:brett@apache.org">Brett Porter</a>
   * @plexus.component role="org.apache.maven.shared.release.phase.ReleasePhase" role-hint="scm-check-modifications"
   */
  public class ScmCheckModificationsPhase
      extends AbstractReleasePhase
  {
      /**
       * Tool that gets a configured SCM repository from release configuration.
       * 
       * @plexus.requirement
       */
      private ScmRepositoryConfigurator scmRepositoryConfigurator;
      
      /**
       * SCM URL translators mapped by provider name.
       *
       * @plexus.requirement role="org.apache.maven.shared.release.scm.ScmTranslator"
       */
      private Map<String, ScmTranslator> scmTranslators;
  
      /**
       * The filepatterns to exclude from the status check.
       * 
       * @todo proper construction of filenames, especially release properties
       */
      private Set<String> exclusionPatterns = new HashSet<String>( Arrays.asList(
          "**" + File.separator + "pom.xml.backup", "**" + File.separator + "pom.xml.tag",
          "**" + File.separator + "pom.xml.next", "**" + File.separator + "pom.xml.branch",
          "**" + File.separator + "release.properties", "**" + File.separator + "pom.xml.releaseBackup" ) );
  
      public ReleaseResult execute( ReleaseDescriptor releaseDescriptor, ReleaseEnvironment releaseEnvironment,
                                    List<MavenProject> reactorProjects )
          throws ReleaseExecutionException, ReleaseFailureException
      {
          ReleaseResult relResult = new ReleaseResult();
  
          List<String> additionalExcludes = releaseDescriptor.getCheckModificationExcludes();
  
          if ( additionalExcludes != null )
          {
              // SelectorUtils expects OS-specific paths and patterns
              for ( String additionalExclude : additionalExcludes )
              {
                  exclusionPatterns.add( additionalExclude.replace( "\\", File.separator ).replace( "/", File.separator ) );
              }
          }
 
         logInfo( relResult, "Verifying that there are no local modifications..." );
         logInfo( relResult, "  ignoring changes on: " + StringUtils.join( exclusionPatterns.toArray(), ", " ) );
 
         ScmRepository repository;
         ScmProvider provider;
         try
         {
             repository =
                 scmRepositoryConfigurator.getConfiguredRepository( releaseDescriptor, releaseEnvironment.getSettings() );
 
             provider = scmRepositoryConfigurator.getRepositoryProvider( repository );
         }
         catch ( ScmRepositoryException e )
         {
             throw new ReleaseScmRepositoryException( e.getMessage() + " for URL: "
                 + releaseDescriptor.getScmSourceUrl(), e.getValidationMessages() );
         }
         catch ( NoSuchScmProviderException e )
         {
             throw new ReleaseExecutionException( "Unable to configure SCM repository: " + e.getMessage(), e );
         }
 
         StatusScmResult result;
         try
         {
             result =
                 provider.status( repository, new ScmFileSet( new File( releaseDescriptor.getWorkingDirectory() ) ) );
         }
         catch ( ScmException e )
         {
             throw new ReleaseExecutionException( "An error occurred during the status check process: " + e.getMessage(),
                                                  e );
         }
 
         if ( !result.isSuccess() )
         {
             throw new ReleaseScmCommandException( "Unable to check for local modifications", result );
         }
 
         List<ScmFile> changedFiles = result.getChangedFiles();
 
         if ( !changedFiles.isEmpty() )
         {
             ScmTranslator scmTranslator = scmTranslators.get( repository.getProvider() );
             
             // TODO: would be nice for SCM status command to do this for me.
             for ( Iterator<ScmFile> i = changedFiles.iterator(); i.hasNext(); )
             {
                 ScmFile f = i.next();
 
                 String path;
                 if ( scmTranslator != null )
                 {
                     path = scmTranslator.toRelativePath( f.getPath() );
                 }
                 else
                 {
                     path = f.getPath();
                 }
 
                 // SelectorUtils expects File.separator, don't standardize!
                 String fileName = path.replace( "\\", File.separator ).replace( "/", File.separator );
 
                 for ( String exclusionPattern : exclusionPatterns )
                 {
                     if ( SelectorUtils.matchPath( exclusionPattern, fileName ) )
                     {
                         logDebug( relResult, "Ignoring changed file: " + fileName );
                         i.remove();
                         break;
                     }
                 }
             }
         }
 
         if ( !changedFiles.isEmpty() )
         {
             StringBuilder message = new StringBuilder();
 
             for ( ScmFile file : changedFiles )
             {
                 message.append( file.toString() );
                 message.append( "\n" );
             }
 
             throw new ReleaseFailureException( "Cannot prepare the release because you have local modifications : \n"
                 + message );
         }
 
         relResult.setResultCode( ReleaseResult.SUCCESS );
 
         return relResult;
     }
 
     public ReleaseResult simulate( ReleaseDescriptor releaseDescriptor, ReleaseEnvironment releaseEnvironment,
                                    List<MavenProject> reactorProjects )
         throws ReleaseExecutionException, ReleaseFailureException
     {
         // It makes no modifications, so simulate is the same as execute
         return execute( releaseDescriptor, releaseEnvironment, reactorProjects );
     }
 }