package org.apache.maven.plugins.help;

 /*

  * 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 java.io.IOException;

 import java.util.Date;

 import java.util.Iterator;

 import java.util.Properties;

 import org.apache.maven.plugin.MojoExecutionException;

 import org.codehaus.plexus.util.StringUtils;

 import org.codehaus.plexus.util.cli.CommandLineUtils;

 /**

  * Displays a list of the platform details like system properties and environment variables.

  *

  * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>

  * @version $Id: SystemMojo.java 689770 2008-08-28 09:47:18Z vsiveton $

  * @since 2.1

  * @goal system

  * @requiresProject false

  */

 public class SystemMojo

     extends AbstractHelpMojo

 {

     /** Magic number to beautify the output */

     private static final int REPEAT = 25;

     // ----------------------------------------------------------------------

     // Public methods

     // ----------------------------------------------------------------------

     /** {@inheritDoc} */

     public void execute()

         throws MojoExecutionException

     {

         StringBuffer message = new StringBuffer();

         message.append( '\n' );

         message.append( StringUtils.repeat( "=", LINE_LENGTH ) ).append( '\n' );

         message.append( StringUtils.repeat( "=", REPEAT ) );

         message.append( " Platform Properties Details " );

         message.append( StringUtils.repeat( "=", REPEAT ) ).append( '\n' );

         message.append( StringUtils.repeat( "=", LINE_LENGTH ) ).append( '\n' );

         message.append( '\n' );

         message.append( StringUtils.repeat( "=", LINE_LENGTH ) ).append( '\n' );

         message.append( "System Properties" ).append( '\n' );

         message.append( StringUtils.repeat( "=", LINE_LENGTH ) ).append( '\n' );

         Properties systemProperties = System.getProperties();

         for ( Iterator it = systemProperties.keySet().iterator(); it.hasNext(); )

         {

             String key = it.next().toString();

             message.append( "\n" );

             message.append( key ).append( "=" ).append( systemProperties.get( key ) );

         }

         message.append( '\n' ).append( '\n' );

         message.append( StringUtils.repeat( "=", LINE_LENGTH ) ).append( '\n' );

         message.append( "Environment Variables" ).append( '\n' );

         message.append( StringUtils.repeat( "=", LINE_LENGTH ) ).append( '\n' );

         try

         {

             Properties envVars = CommandLineUtils.getSystemEnvVars();

             for ( Iterator it2 = envVars.keySet().iterator(); it2.hasNext(); )

             {

                 String key = it2.next().toString();

                 message.append( "\n" );

                 message.append( key ).append( "=" ).append( envVars.get( key ) );

             }

         }

         catch ( IOException e )

         {

             if ( getLog().isWarnEnabled() )

             {

                 getLog().warn( "IOException: " + e.getMessage() );

             }

         }

         message.append( "\n" );

         if ( output != null )

         {

             StringBuffer sb = new StringBuffer();

             sb.append( "Created by: " + getClass().getName() ).append( "\n" );

             sb.append( "Created on: " + new Date() ).append( "\n" ).append( "\n" );

             sb.append( message.toString() );

             try

             {

                 writeFile( output, sb );

             }

             catch ( IOException e )

             {

                 throw new MojoExecutionException( "Cannot write system report to output: " + output, e );

             }

             if ( getLog().isInfoEnabled() )

             {

                 getLog().info( "System report written to: " + output );

             }

         }

         else

         {

             if ( getLog().isInfoEnabled() )

             {

                 getLog().info( message );

             }

         }

     }

 }