package org.codehaus.plexus.util.cli.shell;
   
   /*
    * Copyright The Codehaus Foundation.
    *
    * Licensed 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.codehaus.plexus.util.Os;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * @author Jason van Zyl
   * @version $Id$
   */
  public class BourneShell
      extends Shell
  {
  
      public BourneShell()
      {
          this(false);
      }
  
      public BourneShell( boolean isLoginShell )
      {
          setUnconditionalQuoting( true );
          setShellCommand( "/bin/sh" );
          setArgumentQuoteDelimiter( '\'' );
          setExecutableQuoteDelimiter( '\'' );
          setSingleQuotedArgumentEscaped( true );
          setSingleQuotedExecutableEscaped( false );
          setQuotedExecutableEnabled( true );
          setArgumentEscapePattern("'\\%s'");
  
          if ( isLoginShell )
          {
              addShellArg( "-l" );
          }
      }
  
      /** {@inheritDoc} */
      public String getExecutable()
      {
          if ( Os.isFamily( Os.FAMILY_WINDOWS ) )
          {
              return super.getExecutable();
          }
  
          return quoteOneItem( super.getOriginalExecutable(), true );
      }
  
      public List<String> getShellArgsList()
      {
          List<String> shellArgs = new ArrayList<String>();
          List<String> existingShellArgs = super.getShellArgsList();
  
          if ( ( existingShellArgs != null ) && !existingShellArgs.isEmpty() )
          {
              shellArgs.addAll( existingShellArgs );
          }
  
          shellArgs.add( "-c" );
  
          return shellArgs;
      }
  
      public String[] getShellArgs()
      {
          String[] shellArgs = super.getShellArgs();
          if ( shellArgs == null )
          {
              shellArgs = new String[0];
          }
  
          if ( ( shellArgs.length > 0 ) && !shellArgs[shellArgs.length - 1].equals( "-c" ) )
          {
              String[] newArgs = new String[shellArgs.length + 1];
  
              System.arraycopy( shellArgs, 0, newArgs, 0, shellArgs.length );
              newArgs[shellArgs.length] = "-c";
  
              shellArgs = newArgs;
          }
  
          return shellArgs;
      }
 
     protected String getExecutionPreamble()
     {
         if ( getWorkingDirectoryAsString() == null )
         {
             return null;
         }
 
         String dir = getWorkingDirectoryAsString();
         StringBuilder sb = new StringBuilder();
         sb.append( "cd " );
 
         sb.append( quoteOneItem( dir, false ) );
         sb.append( " && " );
 
         return sb.toString();
     }
 
     /**
      * <p>Unify quotes in a path for the Bourne Shell.</p>
      *
      * <pre>
      * BourneShell.quoteOneItem(null)                       = null
      * BourneShell.quoteOneItem("")                         = ''
      * BourneShell.quoteOneItem("/test/quotedpath'abc")     = '/test/quotedpath'"'"'abc'
      * BourneShell.quoteOneItem("/test/quoted path'abc")    = '/test/quoted pat'"'"'habc'
      * BourneShell.quoteOneItem("/test/quotedpath\"abc")    = '/test/quotedpath"abc'
      * BourneShell.quoteOneItem("/test/quoted path\"abc")   = '/test/quoted path"abc'
      * BourneShell.quoteOneItem("/test/quotedpath\"'abc")   = '/test/quotedpath"'"'"'abc'
      * BourneShell.quoteOneItem("/test/quoted path\"'abc")  = '/test/quoted path"'"'"'abc'
      * </pre>
      *
      * @param path not null path.
      * @return the path unified correctly for the Bourne shell.
      */
     protected String quoteOneItem( String path, boolean isExecutable )
     {
         if ( path == null )
         {
             return null;
         }
 
         StringBuilder sb = new StringBuilder();
         sb.append( "'" );
         sb.append( path.replace( "'", "'\"'\"'" ) );
         sb.append( "'" );
 
         return sb.toString();
     }
 }