On Thu, 6 Dec 2001, Hannes van der Merwe <[EMAIL PROTECTED]> wrote:
> Maybe it is a stupid question, but how should I do that?
Probably more a sign of a flawed documentation (patches are always
welcome).
First, define the classpath that you want to use and don't care for
the environment variable. Do this at the top level.
<path id="my-classpath-without-environment">
... whatever you want to put in here ...
</path>
Next, pull in all environment variables as Ant properties
<property environment="env" />
Then, make all targets that will use you custom classpath in one of
their tasks depend on the following target:
<target name="set-path"
depends="set-path-with-env,set-path-without-env" />
If CLASSPATH has been set, we now have a property env.CLASSPATH, use
it (I assume you want to prepend it):
<target name="set-path-with-env" if="env.CLASSPATH">
<path id="use-this-path">
<pathelement path="${env.CLASSPATH}" />
<pathelement refid="my-classpath-without-environment" />
</path>
</target>
If it has not been set, just use the path already defined, just give
it a different name:
<target name="set-path-with-env" unless="env.CLASSPATH">
<path id="use-this-path">
<pathelement refid="my-classpath-without-environment" />
</path>
</target>
And use the path named "use-this-path" in all the tasks that need it.
There is a different solution that relies on property immutability and
is a lot more compact (but maybe more difficult to understand). Put
this outside of any target (or inside a target all your other targets
depend upon):
<property environment="env" />
<property name="env.CLASSPATH" value="" />
<path id="use-this-path">
<pathelement path="${env.CLASSPATH}" />
... whatever you want to put in here ...
</path>
Stefan
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