I guess one way to do it is you could use <fileset> along with the <date>
selector and scan over all the files that would go in the jar. Set the date in
the <date> selector to the creation of the existing jar.
Now if any files are selected you can then execute the jar task.
Of course, there is question of how to get the creation date (or last modified
date) of a jar file... but that left as exercise to reader :-)
Douglas Kramer <[EMAIL PROTECTED]> wrote:
Novice question.
My ant script works great, skipping compile if source files have not changes,
and skipping copying of resources if they have not changed.
How would I prevent building the jar file if nothing has changed?
description="Builds the jar file that contains the class files">
-Doug
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