Add ghc 9.0 to ci

[fgaz]

Let's see if this works...

#7315

[fgaz]

I guess it has to be in master...

[phadej]

9.0.1 job will start after 8.8.3 passes.

[fgaz]

Aha, thanks. I assumed it would show as "waiting for dependency" or something

[phadej]

The Waiting for status to be reported jobs are there because they are required to pass before non-admins can merge. I.e. they (EDIT: or rather "their existences") come from repository settings, not in-repo CI config.

[phadej]

At least in master:

% make cabal-install-dev
% cabal build -w ghc-9.0.1 --dry all
Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: Cabal-3.5.0.0 (user goal)
[__1] trying: base-4.15.0.0/installed-4.15.0.0 (dependency of Cabal)
[__2] trying: Cabal-described-3.5.0.0 (user goal)
[__3] next goal: rere (dependency of Cabal-described)
[__3] rejecting: rere-0.1 (conflict: base==4.15.0.0/installed-4.15.0.0, rere
=> base>=4.3.0.0 && <4.15)
[__3] fail (backjumping, conflict set: Cabal-described, base, rere)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, Cabal, Cabal-described, rere
Try running with --minimize-conflict-set to improve the error message.

So I doubt the job will succeed.

[fgaz]

it did fail, but even before than the solving phase: there's no 9.0 container

[phadej]

Hmm. I build the containers, but looks like I forgot to push them. They'll be up in an hour or so (many bytes to upload).

[fgaz]

Blocked on haskell-hvr/cryptohash-sha256#12 (or I could leave there the allow-newer if the tests pass)

[phadej]

I pushed the containers for 9.0

[fgaz]

Blocked on https://hub.darcs.net/shelarcy/regex-compat-tdfa/issue/2 too

[phadej]

@fgaz, I'd drop regex-compat-tdfa from cabal-testsuite in favour of regex-posix or regex-tdfa (both of which work on windows nowadays). EDIT: and are maintained.

EDIT: screw that. I guess we need unicode support for where regex-compat-tdfa is used. But maybe using regexes there (in OutputNormalizer) is something we need to rethink finally. That module is a nightmare.

[fgaz]

...I just copied the only function we use and fixed it.

@phadej what would you replace regexes with?

[phadej]

Good question. I'm not sure what regex-compat-tdfa does, looks like that not much, so I'd just use regex-tdfa https://hackage.haskell.org/package/regex-compat-tdfa-0.95.1.4/docs/src/Text-Regex.html