Cats: Scalafix rule to help migration to 2.2.0
I'm really looking forward to upgrading to 2.2.0 and deleting all my cats.instances.* imports!
Is it worth providing an official scalafix rule to help people do this?
It could be just a simple grep to delete all import cats.instances.* lines, or it could be a bit smarter and also delete import cats.implicits._ lines that are only being used to import instances, not syntax.
cb372
All 5 comments
Started work on a rule here: https://github.com/cb372/cats/tree/scalafix-rules-2.2.0
Now I just need to draw the rest of the owl...
cb372
on 12 Aug 2020
There was an issue with Future's instances through.
joroKr21
on 12 Aug 2020
Yes, I saw the discussion about that. I think it should be pretty simple to make the rule do special handling for Future instances.
cb372
on 13 Aug 2020
It would be great to add this migration rule to Scala Steward so that it can be used for the PRs that update Cats to 2.2.0.
fthomas
on 13 Aug 2020
Sure! If my PR gets merged, I'll make a PR to add it to Scala Steward.
cb372
on 13 Aug 2020
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Most helpful comment
It would be great to add this migration rule to Scala Steward so that it can be used for the PRs that update Cats to 2.2.0.