Make ouroboros-consensus-protocol-test a standalone package inside of a sub-library.

[KtorZ]

Sub-libraries are not supported by stack (see commercialhaskell/stack#5318) and provide here very little benefits other than being able to nest files under one directory. Plus, this is inconsistent with how current test libraries (e.g. ouroboros-consensus-shelley-test) are handled.

Feel free to reject this PR and close it saying "we don't want to support stack". I am simply opening to raise awareness about this problem and because I had to fork the repository to do this anyway.

[hasufell]

@KtorZ there's a (drunk) PR attempt to fix this in stack, have you tried it?

commercialhaskell/stack#5659

[KtorZ]

@hasufell yup, saw that! Yet "drunk attempt" kind of drove me away and I feared that it may be more effort to get this working that actually forking the repository and removing the sub-libraries. I was happy to see that Hai did submit a PR and I guess he hit the same wall as I did with Plutus 🤷 ... I did also fork Plutus for the same reasons but removing the sub-libraries was a bit too much effort there.

Perhaps it's better to pick up Hai's PR and get it implemented in stack after all.

[dnadales]

Thank you @KtorZ 🙌 The change seems sensible. We'll look into the hydra error and review this.

[amesgen]

Thanks, seems nice to make life easier for Stack users 👍

I think that adding ouroboros-consensus-protocol-test to cabal.project will fix the Hydra error, see 2ced2ba (just cherry-pick/amend).

[amesgen]

Routine cleanup of stale PRs targeting Consensus components (which nowadays live in https://github.com/IntersectMBO/ouroboros-consensus).

No work is lost, see https://stackoverflow.com/a/17954767.