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From "Darick Jarvis" <>
Subject RE: Very Bad use of Ant...
Date Mon, 28 Aug 2006 18:58:10 GMT

I don't know if this is the official way to call ant within a java task, but
it works for me.  Maybe this can help you.  This will cause it to outlive
the starting script with no handle to it though.

<java classname=""
		<fileset dir="PATH_TO_ANT_LIBRARY" casesensitive="false">
			<include name="*.jar" />
			<include name="*.zip" />
	<arg value="-f" />
	<arg value="FILE_TO_RUN" />
	<arg value="-Dant.home=PATH_TO_ANT_HOME" />
	<arg value="TARGET_TO_RUN" />

Note, it is important to set the ant.home property for it to run correctly

Hope this helps!

-----Original Message-----
From: Dominique Devienne [] 
Sent: Monday, August 28, 2006 2:17 PM
To: Ant Users List
Subject: Re: Very Bad use of Ant...

You can always <java fork="true"> the other Ant, and since they live
in different processes and VMs, they can co-exist peacefully. I think
there's an example somewhere that demonstrates how to call Ant using
<java>. --DD

On 8/28/06, Dan McFadyen <> wrote:
> Hello,
> I am about to ask how to do something that will sound... very very ugly...
> Is there anyway to run a different version of Ant from within an Ant
> I read the faq and found the explantation of the:
>     [exec] java.lang.NoClassDefFoundError:
> org/apache/tools/ant/launch/Launcher
>     [exec] Exception in thread "main"
> I have gone to the 2 different directories I need to run it, and I can run
> each fine (one defined in Env variables, other using absolute path to bin
> dir).
> But... is there any way to not get that?... Or am I stuck with a manual
> if I need 2 versions of Ant to play nice?
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