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From "Steve Loughran" <>
Subject Re: How to warn when jar-file in classpath does not exist?
Date Thu, 14 Feb 2002 21:04:18 GMT

----- Original Message -----
From: "Martin Monsorno" <>
To: <>
Sent: Thursday, February 14, 2002 05:23
Subject: How to warn when jar-file in classpath does not exist?

> Hi *,
> I have the following problem: I add a jar-file to the classpath I use
> for compiling like this:
>   <path id="project.compile.path">
>     <pathelement location="${global.module.dir}/bla.jar" />
>   </path>
> If the jar-file does not exist in this place, ant removes it quietly
> from the classpath it handles over to the java compiler. Even with -v
> there is no error message printed.
> Is this the desired behaviour? Can I make ant print a warning message
> to the screen in case the file does not exist? Or must I check the
> file myself?

standard practise is to use <available> to probe for a class you need; that
decouples you from knowing where the class is implemented, then conditional
<fail> if you really need that class to be there

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