Pacmoon is a script to manage Arch Linux compilatiions in a way similar to emerge on portage.
It is capable of recompiling all (or a set of) packages installed on a system from the AUR and ABS. It has options for scanning the system to see which packages have been replaced with binaries and compiling only those.
At one point, Open Hub analyzed source code for this project based on code location(s) available at that time. Since then, the code locations have been removed.