The homepage of rubber has changed. It is now hosted as launchpad project (https://launchpad.net/rubber) where a new release snapshot 20100306 is available.
Even bumpable to 1.4
Here comes a EAPI 5 version.
Created attachment 419052 [details]
Author: Alexis Ballier <firstname.lastname@example.org>
Date: Wed Jan 6 10:45:23 2016 +0100
dev-tex/rubber: bump to 1.4 and update homepage.
Ebuild by Vincent-Xavier JUMEL and further cleanups by myself.
Signed-off-by: Alexis Ballier <email@example.com>