package org.apache.maven.scm.provider.cvslib.command;
   
   /*
    * 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.ScmFileSet;
  import org.apache.maven.scm.provider.cvslib.repository.CvsScmProviderRepository;
  import org.apache.maven.scm.provider.cvslib.util.CvsUtil;
  import org.apache.maven.scm.providers.cvslib.settings.Settings;
  import org.codehaus.plexus.util.StringUtils;
  import org.codehaus.plexus.util.cli.CommandLineException;
  import org.codehaus.plexus.util.cli.CommandLineUtils;
  import org.codehaus.plexus.util.cli.Commandline;
  
  import java.io.File;
  import java.util.Enumeration;
  
  /**
   * @author <a href="mailto:evenisse@apache.org">Emmanuel Venisse</a>
   *
   */
  public class CvsCommandUtils
  {
      private CvsCommandUtils()
      {
          // noop
      }
  
      public static boolean isCvsNT()
          throws ScmException
      {
          Commandline cl = new Commandline();
  
          cl.setExecutable( "cvs" );
  
          cl.createArg().setValue( "-v" );
  
          CommandLineUtils.StringStreamConsumer stdout = new CommandLineUtils.StringStreamConsumer();
  
          CommandLineUtils.StringStreamConsumer stderr = new CommandLineUtils.StringStreamConsumer();
  
          try
          {
              CommandLineUtils.executeCommandLine( cl, stdout, stderr );
          }
          catch ( CommandLineException e )
          {
              throw new ScmException( "Error while executing command.", e );
          }
  
          return stdout.getOutput().indexOf( "CVSNT" ) >= 0;
      }
  
      public static Commandline getBaseCommand( String commandName, CvsScmProviderRepository repo, ScmFileSet fileSet )
      {
          return getBaseCommand( commandName, repo, fileSet, null, true );
      }
  
      public static Commandline getBaseCommand( String commandName, CvsScmProviderRepository repo, ScmFileSet fileSet,
                                                boolean addCvsRoot )
      {
          return getBaseCommand( commandName, repo, fileSet, null, addCvsRoot );
      }
  
      public static Commandline getBaseCommand( String commandName, CvsScmProviderRepository repo, ScmFileSet fileSet,
                                                String options )
      {
          return getBaseCommand( commandName, repo, fileSet, options, true );
      }
  
      public static Commandline getBaseCommand( String commandName, CvsScmProviderRepository repo, ScmFileSet fileSet,
                                                String options, boolean addCvsRoot )
      {
          Settings settings = CvsUtil.getSettings();
  
          Commandline cl = new Commandline();
  
          cl.setExecutable( "cvs" );
  
          cl.setWorkingDirectory( fileSet.getBasedir().getAbsolutePath() );
  
          if ( Boolean.getBoolean( "maven.scm.cvs.use_compression" ) )
         {
             cl.createArg().setValue( "-z" + System.getProperty( "maven.scm.cvs.compression_level", "3" ) );
         }
         else if ( settings.getCompressionLevel() > 0 )
         {
             cl.createArg().setValue( "-z" + settings.getCompressionLevel() );
         }
 
         if ( !settings.isUseCvsrc() )
         {
             cl.createArg().setValue( "-f" ); // don't use ~/.cvsrc
         }
 
         if ( settings.isTraceCvsCommand() )
         {
             cl.createArg().setValue( "-t" );
         }
 
         if ( !StringUtils.isEmpty( settings.getTemporaryFilesDirectory() ) )
         {
             File tempDir = new File( settings.getTemporaryFilesDirectory() );
 
             if ( !tempDir.exists() )
             {
                 tempDir.mkdirs();
             }
 
             cl.createArg().setValue( "-T" );
 
             cl.createArg().setValue( tempDir.getAbsolutePath() );
         }
 
         if ( settings.getCvsVariables().size() > 0 )
         {
             for ( Enumeration<?> e = settings.getCvsVariables().propertyNames(); e.hasMoreElements(); )
             {
                 String key = (String) e.nextElement();
                 String value = settings.getCvsVariables().getProperty( key );
                 cl.createArg().setValue( "-s" );
                 cl.createArg().setValue( key + "=" + value );
             }
         }
 
         if ( addCvsRoot )
         {
             cl.createArg().setValue( "-d" );
 
             cl.createArg().setValue( repo.getCvsRoot() );
         }
 
         cl.createArg().setLine( options );
 
         cl.createArg().setValue( "-q" );
 
         cl.createArg().setValue( commandName );
 
         return cl;
     }
 }