optics-0.4 release

[phadej]

I'm very eager to use indexed-traversable.

I haven't followed the LabelOptic changes, is the #365 only things left?

Does @adamgundry or @arybczak have some breaking changes in mind, which would be great to get in?

I think it would be great to have GHC-9.0 compatible release as soon as it is released, so that could be a (soft) deadline for optics-0.4.

[arybczak]

Apart from #365 I need to port a bit from ekmett/lens#945. Other than that I think it's good to go.

[adamgundry]

Sorry, I haven't been keeping up because of "holidays", but I'm supportive of releasing optics-0.4 around the GHC-9.0 release if not before. I'll try to find an opportunity to properly review the recent changes in the next week or so. But I don't have anything that is urgent to land before a release.

[phadej]

GHC-9.0 is released.

[arybczak]

I suggest merging #399 and getting a release out.

[adamgundry]

Sounds good to me!

[adamgundry]

We don't have CI for GHC 9.0.1 yet (haskell-CI/haskell-ci#474), but I've verified locally that the main packages build and pass tests.

Still lacking:

• optics-sop is blocked by A release for GHC-9.0 generics-sop#130 (but isn't released anyway)
• template-haskell-optics needs to be amended to support template-haskell-2.17.0.0
• Benchmarks don't build because of dependency bounds, but they can be persuaded to with enough allow-newer.

As far as I can see we need to:

• Upload 0.4 releases of optics-core, optics-th, optics-extra and optics to Hackage.
• Relax the bounds of the released optics-vl to permit optics-core-0.4.
• Add release tag.

I'm going to open a PR with some minor changelog fixes. Provisionally I'm planning to make a release early next week. Anything else we need to do first?

[adamgundry]

• https://hackage.haskell.org/package/optics-core-0.4/candidate
• https://hackage.haskell.org/package/optics-extra-0.4/candidate
• https://hackage.haskell.org/package/optics-th-0.4/candidate
• https://hackage.haskell.org/package/optics-0.4/candidate

[phadej]

I tested some small developments, and at least optics-core package doesn't break anything unexpectedly there

[adamgundry]

I've made the release.

[phadej]

Hurray!