Source code formatting with cabal

>> Ormolu is build-system independent. It depends on GHC but it won't depend on Cabal. There won't be anything that goes beyond single-file processing, in particular there won't be anything that will have anything to do with Cabal files (parsing them, etc.). It is outside of the scope of the tool. @phadej

>> Or to say it directly: we won't hard code any formatters, why ormolu and not say brittany? @phadej

> Sure. The way to do is to have some sort of plugin system for this. @mrkkrp

_@lspitzner Would you mind sharing your view on how brittany could be integrated with Cabal?_