Support for ghc-9.0.1

[jneira]

• I guess this needs to be updated to ghc-lib-parser-9.0.1
• The unique issue i've seen about is Test failures with GHC 9 #370

[Ailrun]

@jaspervdj, is there any news on this? It would be appreciated if we can hear some plans or difficulties.

[michaelpj]

Even better if we could get 9.2.1 support as well!

[jaspervdj]

I started a branch for the jump to 9.2. There's been a fair amount of changes that impact how we use the API. Overall they're improvements so they'll give me an opportunity to clean up some stuff. I expect to finish this in a couple of weeks.

[jaspervdj]

Currently, all but two of the larger steps (data and module_header) have been ported and seem to work fine using the GHC 9.2 (compiled with GHC 9.0), so getting close. Sorry to take such a long time on this but other stuff (Job/GSoC/ZuriHac/Snowboarding) is keeping me quite busy.

[Mikolaj]

Is there a branch one compile to have stylish-haskell work with GHC 9.2.1/2?

[jaspervdj]

Is there a branch one compile to have stylish-haskell work with GHC 9.2.1/2?

@Mikolaj You can try the ghc-9.2 branch. Everything should work fine except the data step which will be skipped.

[Mikolaj]

Thank you for the hint. I've just tried it, with GHC 9.2.2 and got:

After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: stylish-haskell, ghc-lib-parser-ex,
text, template-haskell, base, ghc-boot, ghc-lib-parser-ex:auto

Not 100% sure it's stylish-haskell's fault. I haven't tried with GHC 9.2.1.

[Mikolaj]

Thank you! But something weird happened --- newest commits are now from 2013.

[Mikolaj]

And on branch ghc-9.2 with GHC 9.2.2 I'm still having

~/r/stylish-haskell$ cabal install --minimize-conflict-set
Error: cabal: Could not resolve dependencies:
[__0] trying: stylish-haskell-0.13.0.0 (user goal)
[__1] next goal: text (dependency of stylish-haskell)
[__1] rejecting: text-1.2.5.0/installed-1.2.5.0 (conflict: stylish-haskell =>
bytestring>=0.9 && <0.11, text => bytestring==0.11.3.0/installed-0.11.3.0)
[__1] rejecting: text-2.0 (conflict: stylish-haskell => text>=1.2 && <1.3)
[__1] trying: text-1.2.5.0
[__2] trying: template-haskell-2.18.0.0/installed-2.18.0.0 (dependency of
text)
[__3] trying: ghc-lib-parser-ex-9.2.0.3 (dependency of stylish-haskell)
[__4] trying: ghc-lib-parser-ex:+auto
[__5] next goal: ghc-boot (dependency of ghc-lib-parser-ex +auto)
[__5] rejecting: ghc-boot-9.2.2/installed-9.2.2 (conflict: stylish-haskell =>
bytestring>=0.9 && <0.11, ghc-boot => bytestring==0.11.3.0/installed-0.11.3.0)
[__5] rejecting: ghc-boot-9.2.1 (conflict: template-haskell =>
ghc-boot-th==9.2.2/installed-9.2.2, ghc-boot => ghc-boot-th==9.2.1)
[__5] rejecting: ghc-boot-9.0.1 (conflict: template-haskell =>
base==4.16.1.0/installed-4.16.1.0, ghc-boot => base>=4.7 && <4.16)
[__5] rejecting: ghc-boot-8.8.3, ghc-boot-8.8.1 (conflict: template-haskell =>
base==4.16.1.0/installed-4.16.1.0, ghc-boot => base>=4.11 && <4.14)
[__5] rejecting: ghc-boot-8.6.5, ghc-boot-8.6.4, ghc-boot-8.6.1 (conflict:
template-haskell => base==4.16.1.0/installed-4.16.1.0, ghc-boot => base>=4.10
&& <4.13)
[__5] rejecting: ghc-boot-8.4.4, ghc-boot-8.4.3, ghc-boot-8.4.2,
ghc-boot-8.4.1 (conflict: template-haskell =>
base==4.16.1.0/installed-4.16.1.0, ghc-boot => base>=4.8 && <4.12)
[__5] rejecting: ghc-boot-8.2.2, ghc-boot-8.2.1 (conflict: template-haskell =>
base==4.16.1.0/installed-4.16.1.0, ghc-boot => base>=4.8 && <4.11)
[__5] rejecting: ghc-boot-8.0.2, ghc-boot-8.0.1 (conflict: template-haskell =>
base==4.16.1.0/installed-4.16.1.0, ghc-boot => base>=4.7 && <4.10)
[__5] fail (backjumping, conflict set: ghc-boot, ghc-lib-parser-ex,
stylish-haskell, template-haskell, ghc-lib-parser-ex:auto)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: stylish-haskell, ghc-lib-parser-ex,
template-haskell, text, ghc-boot, base, ghc-lib-parser-ex:auto