Ant with jDeveloper, reading the environment

I should like to use Ant to build and deploy our J2EE applications.
The main reason is to get better control of what's put inside the WAR and EAR files eg. correct application.xml/orion-application.xml, correct property-files which might exist in different versions for development, test, production etc.
The best solution is perhaps to use standalone Ant, but since we use jDeveloper we'll try to use ant from jdev 903.
To control the behaviour of Ant I was planning to read the environment in the build script.
When running in jDev, I have problems with reading the environmet settings, like:
<property environment="env" />
<property name="oc4j.home" value="${env.OC4J_HOME}"/>
Anyone that has a solution?
thanks, Trond R.

Trond,
One way to handle this situation is to put all of your developer properties in a separate properties file, then load this file using the file attribute of the Ant property task. For example, you could create a file named build.properties, which contains the following line:
oc4j.home = c:\oc4j
Then, in your Ant buildfile, use:
<property file="build.properties"/>
This allows the developer to customize the build.properties file for their specific machine, but still use the standard build.xml file from the source control.
Using this mechanism, the developer can also override properties on the Ant command line for a specific build using the -D option. For example,
ant -Doc4j.home=d:\oc4j
This would override the value in the build.properties file for this build. You can specify Ant command line options in JDeveloper using the Ant panel under Project Properties.
Using a properties file instead of environment variables makes your Ant buildfile more portable. It can be used within an IDE such as JDeveloper, and can be run on any platform.
-Matt Hawkins, JDeveloper Team

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