Alternative to ABS, uses svn to pull Arch Linux PKGBUILD and associated files.
Simply place this file somewhere and source it in your login shell's init script such as ~/.bashrc or ~/.zshrc like so:
source /path/to/getpkg
Be sure to define a work directory which is where building will occur. I recommend using an area mounted to tmpfs if you have enough RAM. If none is defined, the current directory is used.