How to manage a common ant build script across multiple project build jobs on jenkins?

Question

I have a set of java projects coming from different git repositories which I want to be built with Jenkins.

All of them share the same ant build script, which employ

Answer 1

A couple of ideas...

1. Store the Ant script in an artifact repository that your individual projects can pull from, like any other dependency.
2. Create a parent Git project that contains the build script. In your parent project, pull down each individual sub-project as a Git submodule. You would probably need to make some minor modification to your script in order to parameterize the sub-project references in the build script.

This answer is not specific to Jenkins and should be portable to other build servers.