[ghc-steering-committee] #380 GHC2021: Current status

[Spiwack, Arnaud]

On Fri, Dec 4, 2020 at 2:25 PM Eric Seidel <eric at seidel.io> wrote:

> Do Bazel/Buck/etc reuse Cabal or do they reimplement the build themselves?
> I haven't used either (at Bloomberg we use cabal and stack, and good point
> about default-language, I forgot that was required), but my impression is
> that Bazel likes to reimplement everything so it can see precise
> dependencies, have granular caching, etc.
>

I don't know what the Buck Haskell support does. But in Bazel, you have a
bit of both. The default behaviour is to build external dependencies with
Cabal [1], and local files in pure Bazel [2]. By default, Bazel's
rules_haskell will want to use GHC's defaults on your files.

[1]:
https://release.api.haskell.build/haskell/cabal.html#haskell_cabal_library
[2]: https://release.api.haskell.build/haskell/defs.html#haskell_library
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