public static CompilerConfiguration generateCompilerConfigurationFromOptions(CommandLine cli)
      throws IOException {
    //
    // Setup the configuration data

    CompilerConfiguration configuration = new CompilerConfiguration();

    if (cli.hasOption("classpath")) {
      configuration.setClasspath(cli.getOptionValue("classpath"));
    }

    if (cli.hasOption('d')) {
      configuration.setTargetDirectory(cli.getOptionValue('d'));
    }

    if (cli.hasOption("encoding")) {
      configuration.setSourceEncoding(cli.getOptionValue("encoding"));
    }

    if (cli.hasOption("basescript")) {
      configuration.setScriptBaseClass(cli.getOptionValue("basescript"));
    }

    // joint compilation parameters
    if (cli.hasOption('j')) {
      Map<String, Object> compilerOptions = new HashMap<String, Object>();

      String[] opts = cli.getOptionValues("J");
      compilerOptions.put("namedValues", opts);

      opts = cli.getOptionValues("F");
      compilerOptions.put("flags", opts);

      configuration.setJointCompilationOptions(compilerOptions);
    }

    if (cli.hasOption("indy")) {
      configuration.getOptimizationOptions().put("int", false);
      configuration.getOptimizationOptions().put("indy", true);
    }

    if (cli.hasOption("configscript")) {
      String path = cli.getOptionValue("configscript");
      File groovyConfigurator = new File(path);
      Binding binding = new Binding();
      binding.setVariable("configuration", configuration);

      CompilerConfiguration configuratorConfig = new CompilerConfiguration();
      ImportCustomizer customizer = new ImportCustomizer();
      customizer.addStaticStars(
          "org.codehaus.groovy.control.customizers.builder.CompilerCustomizationBuilder");
      configuratorConfig.addCompilationCustomizers(customizer);

      GroovyShell shell = new GroovyShell(binding, configuratorConfig);
      shell.evaluate(groovyConfigurator);
    }

    return configuration;
  }
 /**
  * Copy constructor. Use this if you have a mostly correct configuration for your compilation but
  * you want to make a some changes programmatically. An important reason to prefer this approach
  * is that your code will most likely be forward compatible with future changes to this
  * configuration API.<br>
  * An example of this copy constructor at work:<br>
  *
  * <pre>
  *    // In all likelihood there is already a configuration in your code's context
  *    // for you to copy, but for the sake of this example we'll use the global default.
  *    CompilerConfiguration myConfiguration = new CompilerConfiguration(CompilerConfiguration.DEFAULT);
  *    myConfiguration.setDebug(true);
  * </pre>
  *
  * @param configuration The configuration to copy.
  */
 public CompilerConfiguration(CompilerConfiguration configuration) {
   setWarningLevel(configuration.getWarningLevel());
   setOutput(configuration.getOutput());
   setTargetDirectory(configuration.getTargetDirectory());
   setClasspathList(new LinkedList(configuration.getClasspath()));
   setVerbose(configuration.getVerbose());
   setDebug(configuration.getDebug());
   setTolerance(configuration.getTolerance());
   setScriptBaseClass(configuration.getScriptBaseClass());
   setRecompileGroovySource(configuration.getRecompileGroovySource());
   setMinimumRecompilationInterval(configuration.getMinimumRecompilationInterval());
   setTargetBytecode(configuration.getTargetBytecode());
   setDefaultScriptExtension(configuration.getDefaultScriptExtension());
   setSourceEncoding(configuration.getSourceEncoding());
   setOutput(configuration.getOutput());
   setTargetDirectory(configuration.getTargetDirectory());
   Map jointCompilationOptions = configuration.getJointCompilationOptions();
   if (jointCompilationOptions != null) {
     jointCompilationOptions = new HashMap(jointCompilationOptions);
   }
   setJointCompilationOptions(jointCompilationOptions);
   setPluginFactory(configuration.getPluginFactory());
 }