feat: Bump GHC 9.8.4 + add bullseye image for 9.8.4

[Totto16]

Bumping 9.8.2 to 9.8.4.
Adding a bullseye variant of version 9.8.4 based on #134

Stackage LTS 23 released recently, which needs ghc 9.8.4

Info

Download: https://downloads.haskell.org/ghc/9.8.4/
Blog: https://www.haskell.org/ghc/blog/20241202-ghc-9.8.4-released.html

[jhrcek]

Thank you. LGTM

[Totto16]

As far as I can see, the CI failures are not directly related to this PR

[jhrcek]

@Totto16 I'm addressing the CI failures here: #144
Let me merge that first before merging this PR.

However I just realized now that docker-library/official-images (https://github.com/docker-library/official-images/blob/master/library/haskell) no longer accepts buster (debian 10) based images (see #132 (comment)) because buster is past the end of life.

So if you really want an official haskell image with ghc 8.4 support, we'll have to migrate the dockerfiles to be based on bullseye (debian 11) at least. Do you want to take a stab at that? You can find some inspiration in similar PRs where we added bullseye support for ghc 9.6 (#137) and 9.10 (#134). If you don't, I can take a stab at that later this week.

[Totto16]

@Totto16 I'm addressing the CI failures here: #144 Let me merge that first before merging this PR.

Ah I see, 👍🏼

However I just realized now that docker-library/official-images (https://github.com/docker-library/official-images/blob/master/library/haskell) no longer accepts buster (debian 10) based images (see #132 (comment)) because buster is past the end of life.

So if you really want an official haskell image with ghc 8.4 support, we'll have to migrate the dockerfiles to be based on bullseye (debian 11) at least. Do you want to take a stab at that? You can find some inspiration in similar PRs where we added bullseye support for ghc 9.6 (#137) and 9.10 (#134). If you don't, I can take a stab at that later this week.

I can do that. 👍🏼

I don't use debian that much, so I didn't know the newest version was already 12, and 11 isn't even the newest 😓
But the release supports deb11 for both arm64 and x86_64 but deb12 only for x86_64, which is interesting, as deb12 is out since "10 June 2023" and I wonder why there are releases with the EOL distro deb10 and no for the newest one 😓

[Totto16]

As far as I see, the old buster images are still bumped, so that we have e.g. 9.6.6 in all 2 variants of buster and bullseye, so I would say, that the old should also be updated to 9.8.4, so I didn't remove the first commit but add the new images based on bullseye based on the 9.10.1 images

[Totto16]

Should I also bump cabal to 3.12 ?
like you said here
#141 (comment)

[jhrcek]

I would say, that the old should also be updated to 9.8.4, so I didn't remove the first commit but add the new images based on bullseye based on the 9.10.1 images

Adding separate bullseye images (and keeping buster ones around) makes sense to me.
I don't have historical context, but is seems to be precedent in this repo, so let's just carry on with it.

Should I also bump cabal to 3.12 ?

Let's keep the PR focused on ghc 9.8.4 upgrade and let's do cabal 3.12 upgrade separately (because ghc 9.8 should work fine with cabal 3.10 based on its release page)

[develop7]

Should I also bump cabal to 3.12 ?

I second @jhrcek, let's leave it as is for now

[develop7]

LGTM, merging