I have attached a patch which exposes SVN_AUTHOR and SVN_COMMIT_MSG environment variables (and _n versions for multi-module projects) in the same way that SVN_REVISION and SVN_URL are exposed.

This patch is made against trunk@39940, and it would be great to get it into the 1.33 release.

As per my previous patch, I'm afraid I cannot get the test suite to run ("mvn clean install" fails the tests), so I haven't written any tests for this patch, and cannot validate that it doesn't break any existing tests. I've done "real life" testing, and it seems good.