My personal build script for OpenWrt. I've written it to make updating my routers and access points easier and faster.
If you want to use it, you're supposed to make several copies of this script - one for your every device. I've considered automatically building for several hotspots, but I don't have any good reasons to implement it right now.
Check out some related projects - openwrtbuilder and openwrt-image-buildomatic.