Allow Fourmolu 0.12

[georgefst]

No description provided.

[July541]

fourmolu/fourmolu#309

Since fourmolu-0.11.0.0 lack of some configuration, is it possible to remove this version from the candidate list?

[georgefst]

I'm not sure that removing it would really achieve much? 0.11 isn't actually buggy, and 0.12 even has the same default behaviour as 0.11 (fourmolu/fourmolu#304 just adds an off-by-default option). Besides, with index-state bumped, Cabal should always pick up 0.12 when possible.

The one slight annoyance here is GHC 9.0, which 0.12 drops support for due to the ghc-lib-parser bump. We could add if impl(ghc == 9.0) constraints: fourmolu ^>= 0.10 to cabal.project but then 9.0 users would miss out on other fixes from Fourmolu 0.11, and it wouldn't be obvious why. On the other hand, I don't think 9.0 is particularly heavily used anyway, since 9.2 was out before a lot of libraries supported it.

It seems the Nix builds are already constrained in this way. Is this for the same reason (1a8d8a2 is lacking some context)? If so, we should revert that commit for 9.2 at least.

[July541]

0.11 isn't actually buggy

0.11 introduced a big format diff without any space for user to configure, it doesn't obey the fourmolu's principle: allows arbitrary configuration

I pushed 1a8d8a2 just make CI to green without any version opinion😅

Besides, with index-state bumped, Cabal should always pick up 0.12 when possible.

Agree, keeping v0.11 doesn't matter for me.

[georgefst]

0.11 introduced a big format diff without any space for user to configure, it doesn't obey the fourmolu's principle: allows arbitrary configuration

Fair enough, but it's never going to be possible for that to be literally true!

I pushed 1a8d8a2 just make CI to green without any version opinionsweat_smile

Ah, okay, I don't really understand why it made a difference, but it doesn't matter now.

Agree, keeping v0.11 doesn't matter for me.

So, just to be clear, you're happy with this PR as-is?

[July541]

So, just to be clear, you're happy with this PR as-is?

Sure, can't wait to use Fourmolu v0.12!