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From "Martin Gainty" <>
Subject Re: Settting environment variables
Date Thu, 19 Apr 2007 14:36:27 GMT
true ..the immutable property primary contribution was in file property 
expansion and the ability for the value of an environment var to propagate 
to 'property'

If you're looking for the ability to change (a variable) in build.xml take 
look at ant-contrib 'variable'

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----- Original Message ----- 
From: <>
To: <>
Cc: <>
Sent: Thursday, April 19, 2007 10:11 AM
Subject: RE: Settting environment variables

Propertys in Ant are immutable, so you can't reset the value (with vanilla 
Ant - ant-contrib may let you).

Depending on what you need the system property for, though, you may be able 
to use <sysproperty>.


-----Original Message-----
From: query []
Sent: Thursday, April 19, 2007 8:26 AM
To: ant
Subject: Settting environment variables


I am having a set of ANT build files. I want to change "Path" and "include" 
environment variables only in build file.
I tried the following options to reset "include" variable in the build file.

<property environment="env"/>
1.<exec executable="cmd">
     <env key="include" path="${new.includepath}"/>

2.<property name="${env.include}" value="${new.includepath}"/>

3.<property name="env.include" value="${new.includepath}"/>

4.<property name="env.${include}" value="${new.includepath}"/>

When I tried to echo "include" variable in the same build file, it is still 
showing the default old settings.

Is there any other way to modify the environment variables only for some 
instance and not for other?

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