Support cabal syntax 3.12 #7933
Description
Since I've seen this during nightly builds:
Unable to parse cabal file from package webdriver-precore-0.2.0.1@sha256:2c644f12cb915bd6491da97af448bb74270cdcee8260f4a39f11c7594b6153c4,7407 (from Hackage)- 0:0: Unsupported cabal-version 3.12. See haskell/cabal#4899.
I tried to support the newer cabal syntax, by updating curator to lts 24-11 and moving to stack 3.9.1 - however the package & haddock representation on the stackage-server got corrupted by this change.
Problem 1:
https://www.stackage.org/diff/nightly-2026-01-17/nightly-2026-01-18 - after the change the core libs are missing, but also webdriver-precore which depended on cabal 3.12 syntax disappeared. Everything looks okay if you diff the corresponding YAML's in the snapshot repository.
Problem 2:
The documentation is missing - e.g. https://www.stackage.org/nightly-2026-01-19/package/evm-opcodes-0.3.0, but you could look at any package for this nightly build.
So my guess is this change needs to implement in sync with stackage-server (and maybe other infrastructure). I also tried to build the server against lts-24.11, but I'm really unsure how to validate my changes. I also tend to believe this might be too big for volunteer contribution since it needs a deep understanding of the infrastructure. At least I had no quick win trying to even succesfully run my local stackage-server - so at least some guidance, what changes are needed and how these could be validated would be needed. At least I don't want to struggle with reverse engineering all the code.
Long story short - for now I switch back to stack 3.7.1 and the curator build against lts-22.43 (see commit below) and hope that the mentioned problems disappear on the next nightly build.
Please also note: I haven't reverted the update on curator side - commercialhaskell/curator@28f0bf6 - since I believe we need to support the newer cabal syntax anyway in a not too distant future (cabal 3.12 with the new syntax was released May 2024).