This repository contains a reimplementation of a subset of Cabal.
Why a reimplementation? Because Cabal is not a Haskell tool, it is a ghc tool. A Haskell tool should be compilable by an implementation of Haskell2010, which Cabal is definitely not.
The implementation assumes a Unix-like system with commands like wget and tar.
To get a consistent set of packages MicroCabal uses Stackage to find compatible packages. So in a sense, MicroCabal is more like a MicroStackage.