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From Matt Benson <gudnabr...@yahoo.com>
Subject Re: Checking for non-existence of environment variable
Date Tue, 24 Jan 2006 21:00:21 GMT
uh... no.  Try it.  Then reread
http://ant.apache.org/manual/CoreTasks/fail.html .

-Matt

--- Sergei Dubov <sdubov@gmail.com> wrote:

> The whole point is that ${env.NO_VALUE} will return
> ${env.NO_VALUE} as 
> its value if it doesn't exist...
> 
> -Serge.
> 
> Burgess, Benjamin wrote:
> > Will <fail unless="env.NO_VALUE"/> work for you?
> > 
> > Ben
> > 
> > -----Original Message-----
> > From: Sergei Dubov [mailto:sdubov@gmail.com] 
> > Sent: Tuesday, January 24, 2006 3:48 PM
> > To: user@ant.apache.org
> > Subject: Checking for non-existence of environment
> variable
> > 
> > Hi guys,
> > 
> > I am sure this question has been asked before. But
> I did my research and
> > 
> > found no answers whatsoever.
> > 
> > Basically I am trying to check for existence of an
> environment variable.
> > 
> > And if it is not defined I want the script to
> fail.
> > 
> > <project name="base" basedir="."
> default="echo-env">
> >      <property environment="env"/>
> > 
> >      <target name="echo-env">
> >          <echo>${env.NO_VALUE}</echo>
> >      </target>
> > </project>
> > 
> > Basically this will return "${env.NO_VALUE}".
> > 
> > And potential <available> check will think it
> actually HAS value. Is 
> > there any way to make Ant recognize that
> System.getenv("NO_VALUE") 
> > returns null?
> > 
> > Thank you very much beforehand,
> > 
> > Serge.
> > 
> >
>
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