Code for this already exists in http://anonsvn.jboss.org/repos/jbosstools/trunk/build/target-platform/targetUpdateFromRepo.xml - just need to port it over to work in the new http://anonsvn.jboss.org/repos/jbosstools/trunk/build/target-platforms/scripts/ folder and ensure it works to produce an updated multiple.target file, which can then be diffed against SVN/Git before committing.

When done, http://anonsvn.jboss.org/repos/jbosstools/trunk/build/target-platform/ will be safe to delete (deprecated by http://anonsvn.jboss.org/repos/jbosstools/trunk/build/target-platforms/)