content: /*
   *  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
   *
   *      https://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.
   *
   */
  package org.apache.tools.ant.taskdefs.launcher;
  
  import java.io.File;
  import java.io.IOException;
  
  import org.apache.tools.ant.Project;
  
  /**
   * A command launcher for OS/2 that uses 'cmd.exe' when launching
   * commands in directories other than the current working directory.
   *
   * <p>Unlike Windows NT and friends, OS/2's cd doesn't support the /d
   * switch to change drives and directories in one go.</p>
   */
  public class OS2CommandLauncher extends CommandLauncherProxy {
      public OS2CommandLauncher(CommandLauncher launcher) {
          super(launcher);
      }
  
      /**
       * Launches the given command in a new process, in the given
       * working directory.
       *
       * @param project
       *        the Ant project.
       * @param cmd
       *        the command line to execute as an array of strings.
       * @param env
       *        the environment to set as an array of strings.
       * @param workingDir
       *        working directory where the command should run.
       * @return the created Process.
       * @throws IOException
       *         forwarded from the exec method of the command launcher.
       */
      @Override
      public Process exec(Project project, String[] cmd, String[] env,
                          File workingDir) throws IOException {
          File commandDir = workingDir;
          if (workingDir == null) {
              if (project != null) {
                  commandDir = project.getBaseDir();
              } else {
                  return exec(project, cmd, env);
              }
          }
          // Use cmd.exe to change to the specified drive and
          // directory before running the command
          final int preCmdLength = 7;
          final String cmdDir = commandDir.getAbsolutePath();
          String[] newcmd = new String[cmd.length + preCmdLength];
          // CheckStyle:MagicNumber OFF - do not bother
          newcmd[0] = "cmd";
          newcmd[1] = "/c";
          newcmd[2] = cmdDir.substring(0, 2);
          newcmd[3] = "&&";
          newcmd[4] = "cd";
          newcmd[5] = cmdDir.substring(2);
          newcmd[6] = "&&";
          // CheckStyle:MagicNumber ON
          System.arraycopy(cmd, 0, newcmd, preCmdLength, cmd.length);
  
          return exec(project, newcmd, env);
      }
  }