Add some of the other cabal-fmt refactorings?

[michaelpj]

cabal-fmt has, as far as I know, two additional undocumented "refactorings" beyond expanding modules:

1. Inserting "fragments", useful for sharing things between cabal files, e.g. https://github.com/phadej/cabal-fmt/blob/master/fixtures/fragment-section.cabal
2. Expanding file globs in some fields, e.g. https://github.com/phadej/cabal-fmt/blob/master/fixtures/simple-example.cabal#L43

I think both of these are quite nice features, it would be cool if cabal-gild had something similar.

[tfausak]

cabal-fmt's glob-files pragma should be supported by Gild's discover pragma since #86. It uses the same syntax as the module discovery pragma but it discovers files instead of modules.

I would like to add support for importing fragments.

[tfausak]

I don't see any other pragmas that could be ported over: phadej/cabal-fmt#35

https://github.com/phadej/cabal-fmt/blob/86d59df7579cdf97b8169fa37aef7dda716abad2/src/CabalFmt/Pragma.hs#L58-L63

[michaelpj]

Yeah, I guess the fragments is the main one. This came up because we're thinking of using cabal-fmt's fragments, and I would otherwise suggest using cabal-gild :)

[tfausak]

I've tagged this as "help wanted". It would be nice for Gild to support importing fragments. I doubt I'll have the time to add that feature myself.

[BebeSparkelSparkel]

@michaelpj @michaelpj Have you worked on this at all? If so, could you share your changes in a draft pr?

[michaelpj]

I have not looked at this.

[tfausak]

No, I have not yet looked at this. I doubt I will anytime soon.

My only thought about the implementation is that fragments importing other fragments is perhaps desirable but also could get stuck in a loop. Perhaps there should be a configurable maximum depth that defaults to something reasonable.