Multiple repositories and getting the URL that changed

[Philippe Payant]

My project has three SVN repositories (the repo refers to two external repos, for a total of three). The build triggers on a change within any of these repos.  I want my email extension script to be able to tell which repo changed.

I have access to SVN_URL_x and SVN_REVISION_x (where x is 1, 2 or 3).  Now I need to know which of the three repo was changed.  This information needs to be accessed from the email extension script (using groovy right now).