Is it possible to debug an external ant task?

问题:

I have an ant script which calls an external ant task:

    <taskdef name="runStoriesAsEmbeddables" classname="org.jbehave.ant.RunStoriesAsEmbeddables"         
    classpathref="project.classpath" />

     <runStoriesAsEmbeddables includes="**/Ant*Stories.java" ignoreFailureInStories="true" 
     ignoreFailureInView="false" 
     systemProperties="story.path=.,qr.host=*,qr.port=*" generateViewAfterStories="true" />

And I want to use -Xdebug to launch JVM on an unix box. I read several doc which using "jvmarg value="-Xdebug"" in "java" task but for external task...I don't know how to use it. Thanks!

回答1:

Set the ANT_OPTS environment variable before running Ant. Assuming you use the Bash shell:

For Java 1.4:

export ANT_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,address=5005,server=y,suspend=y

For Java 1.5 and later:

export ANT_OPTS=-agentlib:jdwp=transport=dt_socket,address=5005,server=y,suspend=y

Run your Ant script and then attach to port 5005 with your debugger.