Re: output of the 'system'

[Jim White <jim at pagesmiths dot com>]

At 01:20 PM 9/11/2001 -0700, Valentyn Kamyshenko wrote:
>is there a way to capture output of the `system' call in kawa?
>(that is, I'd like to get the listing of the current directory in the
>call
>         (system "ls -l"))

You could use Ant as a library for that.  This code snippet invokes the 
"ant" task, but you could use the "exec" task instead.

http://jakarta.apache.org/ant/index.html

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.BuildLogger;
import org.apache.tools.ant.DefaultLogger;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.Ant;
// import org.apache.tools.ant.taskdefs.ExecTask;
...
         final Project project = new Project();

         project.init();

         final BuildLogger logger = new DefaultLogger();

         logger.setMessageOutputLevel(getOutputLevel());
         logger.setOutputPrintStream(System.out);
         logger.setErrorPrintStream(System.err);
         logger.setEmacsMode(getEmacsMode());
         project.addBuildListener(logger);
//        project.fireBuildStarted();

// This would be where to start changing to exec for "system".
// final ExecTask execTask = (ExecTask) project.createTask("exec");
// The parameters are different than the Ant task of course.

         final Ant antTask = (Ant) project.createTask("ant");

         antTask.setDir(new File(projectPath));

         if 
(!org.apache.tools.ant.Main.DEFAULT_BUILD_FILENAME.equals(getBuildFileName())) 
{
             antTask.setAntfile(getBuildFileName());
         }

         if (target != null)
             antTask.setTarget(target);

         Throwable error = null;

         try {
             antTask.execute();
         } catch(RuntimeException exc) {
             error = exc;
             throw exc;
         } catch(Error err) {
             error = err;
             throw err;
         } finally {
//            project.fireBuildFinished(error);
         }

jim

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James P. White                 Netscape DevEdge Champion for IFC
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