package org.apache.maven.cli;
   
   /*
    * 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.io.InputStream;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.Locale;
  import java.util.Properties;
  
  import org.codehaus.plexus.util.IOUtil;
  import org.codehaus.plexus.util.Os;
  import org.slf4j.Logger;
  
  /**
   * Utility class used to report errors, statistics, application version info, etc.
   *
   * @author jdcasey
   *
   */
  public final class CLIReportingUtils
  {
  
      public static final long MB = 1024 * 1024;
  
      public static final int MS_PER_SEC = 1000;
  
      public static final int SEC_PER_MIN = 60;
      
      public static final String BUILD_VERSION_PROPERTY = "version";
  
      public static String showVersion()
      {
          final String LS = System.getProperty( "line.separator" );
          Properties properties = getBuildProperties();
          StringBuffer version = new StringBuffer();
          version.append( createMavenVersionString( properties ) ).append( LS );
          version.append( reduce( properties.getProperty( "distributionShortName" ) + " home: "
                              + System.getProperty( "maven.home", "<unknown maven home>" ) ) ).append( LS );
          version.append( "Java version: " + System.getProperty( "java.version", "<unknown java version>" )
                              + ", vendor: " + System.getProperty( "java.vendor", "<unknown vendor>" ) ).append( LS );
          version.append( "Java home: " + System.getProperty( "java.home", "<unknown java home>" ) ).append( LS );
          version.append( "Default locale: " + Locale.getDefault() + ", platform encoding: "
                              + System.getProperty( "file.encoding", "<unknown encoding>" ) ).append( LS );
          version.append( "OS name: \"" + Os.OS_NAME + "\", version: \"" + Os.OS_VERSION + "\", arch: \"" + Os.OS_ARCH
              + "\", family: \"" + Os.OS_FAMILY + "\"" );
          return version.toString();
      }
  
      /**
       * Create a human readable string containing the Maven version, buildnumber, and time of build
       * 
       * @param buildProperties The build properties
       * @return Readable build info
       */
      static String createMavenVersionString( Properties buildProperties )
      {
          String timestamp = reduce( buildProperties.getProperty( "timestamp" ) );
          String version = reduce( buildProperties.getProperty( BUILD_VERSION_PROPERTY ) );
          String rev = reduce( buildProperties.getProperty( "buildNumber" ) );
          String distributionName = reduce( buildProperties.getProperty( "distributionName" ) );
  
          String msg = distributionName + " ";
          msg += ( version != null ? version : "<version unknown>" );
          if ( rev != null || timestamp != null )
          {
              msg += " (";
              msg += ( rev != null ? rev : "" );
              if ( timestamp != null )
              {
                  SimpleDateFormat fmt = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ssZ" );
                  String ts = fmt.format( new Date( Long.valueOf( timestamp ) ) );
                  msg += ( rev != null ? "; " : "" ) + ts;
              }
              msg += ")";
          }
          return msg;
      }
  
      private static String reduce( String s )
      {
         return ( s != null ? ( s.startsWith( "${" ) && s.endsWith( "}" ) ? null : s ) : null );
     }
 
     static Properties getBuildProperties()
     {
         Properties properties = new Properties();
         InputStream resourceAsStream = null;
         try
         {
             resourceAsStream = MavenCli.class.getResourceAsStream( "/org/apache/maven/messages/build.properties" );
 
             if ( resourceAsStream != null )
             {
                 properties.load( resourceAsStream );
             }
         }
         catch ( IOException e )
         {
             System.err.println( "Unable determine version from JAR file: " + e.getMessage() );
         }
         finally
         {
             IOUtil.close( resourceAsStream );
         }
 
         return properties;
     }
 
     public static void showError( Logger logger, String message, Throwable e, boolean showStackTrace )
     {
         if ( showStackTrace )
         {
             logger.error( message, e );
         }
         else
         {
             logger.error( message );
 
             if ( e != null )
             {
                 logger.error( e.getMessage() );
 
                 for ( Throwable cause = e.getCause(); cause != null; cause = cause.getCause() )
                 {
                     logger.error( "Caused by: " + cause.getMessage() );
                 }
             }
         }
     }
 
 }