package org.apache.maven.plugins.assembly.archive;
   
   /*
    * 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.archiver.MavenArchiveConfiguration;
  import org.apache.maven.archiver.MavenArchiver;
  import org.apache.maven.artifact.DependencyResolutionRequiredException;
  import org.apache.maven.execution.MavenSession;
  import org.apache.maven.project.MavenProject;
  import org.codehaus.plexus.archiver.AbstractArchiveFinalizer;
  import org.codehaus.plexus.archiver.Archiver;
  import org.codehaus.plexus.archiver.ArchiverException;
  import org.codehaus.plexus.archiver.jar.JarArchiver;
  import org.codehaus.plexus.archiver.jar.Manifest;
  import org.codehaus.plexus.archiver.jar.ManifestException;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.io.Reader;
  import java.nio.charset.StandardCharsets;
  import java.util.Collections;
  import java.util.List;
  
  /**
   *
   */
  public class ManifestCreationFinalizer
      extends AbstractArchiveFinalizer
  {
  
      private final MavenProject project;
  
      private final MavenSession session;
  
      private final MavenArchiveConfiguration archiveConfiguration;
  
      // TODO: I'd really prefer to rewrite MavenArchiver as either a
      // separate manifest creation utility (and to
      // create an include pom.properties etc into another archiver), or
      // an implementation of an archiver
      // (the first is preferable).
      private final MavenArchiver mavenArchiver = new MavenArchiver();
  
      public ManifestCreationFinalizer( final MavenSession session, final MavenProject project,
                                        final MavenArchiveConfiguration archiveConfiguration )
      {
          this.session = session;
          this.project = project;
          this.archiveConfiguration = archiveConfiguration;
      }
  
      @Override
      public void finalizeArchiveCreation( final Archiver archiver )
      {
          if ( archiveConfiguration != null )
          {
              try
              {
                  Manifest manifest;
                  final File manifestFile = archiveConfiguration.getManifestFile();
  
                  if ( manifestFile != null )
                  {
                      try ( Reader manifestFileReader =
                          new InputStreamReader( new FileInputStream( manifestFile ), StandardCharsets.UTF_8 ) )
                      {
                          manifest = new Manifest( manifestFileReader );
                      }
                      catch ( final FileNotFoundException e )
                      {
                          throw new ArchiverException( "Manifest not found: " + e.getMessage(), e );
                      }
                      catch ( final IOException e )
                      {
                          throw new ArchiverException( "Error processing manifest: " + e.getMessage(), e );
                      }
                  }
                  else
                  {
                     manifest = mavenArchiver.getManifest( session, project, archiveConfiguration );
                 }
 
                 if ( ( manifest != null ) && ( archiver instanceof JarArchiver ) )
                 {
                     final JarArchiver jarArchiver = (JarArchiver) archiver;
                     jarArchiver.addConfiguredManifest( manifest );
                 }
             }
             catch ( final ManifestException e )
             {
                 throw new ArchiverException( "Error creating manifest: " + e.getMessage(), e );
             }
             catch ( final DependencyResolutionRequiredException e )
             {
                 throw new ArchiverException( "Dependencies were not resolved: " + e.getMessage(), e );
             }
         }
     }
 
     @Override
     public List<String> getVirtualFiles()
     {
         if ( archiveConfiguration != null )
         {
             try
             {
                 if ( mavenArchiver.getManifest( project, archiveConfiguration.getManifest() ) != null )
                 {
                     return Collections.singletonList( "META-INF/MANIFEST.MF" );
                 }
             }
             catch ( final ManifestException | DependencyResolutionRequiredException ignore )
             {
                 // noop
             }
         }
 
         return null;
     }
 
 }