Expose internal library

[VeryMilkyJoe]

This allows usage of cabal-fmt as a library for other projects.
Specifically I would like to use this for a cabal-fmt plugin I wrote for Haskell Language Server (https://github.com/VeryMilkyJoe/haskell-language-server/tree/cabal-fmt).

[phadej]

I'm sorry, but I'm not ready to commit to maintain cabal-fmt as a library.

[phadej]

After giving it a proper thought (sorry it took some time), I don't want expose cabal-fmt-internal as is.

Please describe an interface you need for your use, and we can expose just that. If it's something like cabalFmt :: FilePath -> ByteString -> ByteString (location of the file, contents, to formatted file), then it will be ok. Exposing more would need a proper discussion.

[fendor]

Hi!
Yes, that is basically what we need in HLS. Plus, it would be great if we were able to specify tabs vs spaces, and the indentation (some basic configuration).

[phadej]

specify tabs vs spaces, and the indentation (some basic configuration).

Indentation is meant to be specified in file with a pragma. (I'd hate if a contributor would mess up my .cabal file because their editor is configured differently).

There is no tabs in .cabal files.

[fendor]

Indentation is meant to be specified in file with a pragma.

Didn't know there was one, tbh. LSP sucks in that regard, as it practically forces you to support tabs and spaces, as well as configurable tab size. Otherwise, it feels very weird in the UX to be able to change the indentation style, but it has no effect on the formatter.

There is no tabs in .cabal files.

My mistake, I thought --tabular meant tabs 😅