Swift Llbuild

llbuild is a set of libraries for building build systems. Unlike most build system projects which focus on the syntax for describing the build, llbuild is designed around a reusable, flexible, and scalable general purpose build engine capable of solving many "build system"-like problems. The project also includes additional libraries on top of that engine which provide support for constructing bespoke build systems (like swift build) or for building from Ninja manifests.