package org.apache.maven.shared.utils.cli.shell;
   
   /*
    * 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.util.ArrayList;
  import java.util.List;
  import org.apache.maven.shared.utils.Os;
  import org.apache.maven.shared.utils.StringUtils;
  
  /**
   * @author Jason van Zyl
   */
  public class BourneShell
      extends Shell
  {
      private static final char[] BASH_QUOTING_TRIGGER_CHARS =
          { ' ', '$', ';', '&', '|', '<', '>', '*', '?', '(', ')', '[', ']', '{', '}', '`' };
  
      public BourneShell()
      {
          setShellCommand( "/bin/sh" );
          setArgumentQuoteDelimiter( '\'' );
          setExecutableQuoteDelimiter( '\"' );
          setSingleQuotedArgumentEscaped( true );
          setSingleQuotedExecutableEscaped( false );
          setQuotedExecutableEnabled( true );
      }
  
      /**
       * {@inheritDoc}
       */
      public String getExecutable()
      {
          if ( Os.isFamily( Os.FAMILY_WINDOWS ) )
          {
              return super.getExecutable();
          }
  
          return unifyQuotes( super.getExecutable() );
      }
  
      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( unifyQuotes( dir ) );
         sb.append( " && " );
 
         return sb.toString();
     }
 
     protected char[] getQuotingTriggerChars()
     {
         return BASH_QUOTING_TRIGGER_CHARS;
     }
 
     /**
      * <p>Unify quotes in a path for the Bourne Shell.</p>
      * <p/>
      * <pre>
      * BourneShell.unifyQuotes(null)                       = null
      * BourneShell.unifyQuotes("")                         = (empty)
      * BourneShell.unifyQuotes("/test/quotedpath'abc")     = /test/quotedpath\'abc
      * BourneShell.unifyQuotes("/test/quoted path'abc")    = "/test/quoted path'abc"
      * BourneShell.unifyQuotes("/test/quotedpath\"abc")    = "/test/quotedpath\"abc"
      * BourneShell.unifyQuotes("/test/quoted path\"abc")   = "/test/quoted path\"abc"
      * BourneShell.unifyQuotes("/test/quotedpath\"'abc")   = "/test/quotedpath\"'abc"
      * BourneShell.unifyQuotes("/test/quoted path\"'abc")  = "/test/quoted path\"'abc"
      * </pre>
      *
      * @param path not null path.
      * @return the path unified correctly for the Bourne shell.
      */
     private static String unifyQuotes( String path )
     {
         if ( path == null )
         {
             return null;
         }
 
         if ( path.indexOf( ' ' ) == -1 && path.indexOf( '\'' ) != -1 && path.indexOf( '"' ) == -1 )
         {
             return StringUtils.escape( path );
         }
 
         return StringUtils.quoteAndEscape( path, '\"', BASH_QUOTING_TRIGGER_CHARS );
     }
 }