Update Scala 3 version to 3.0.0-M1

[tgodzik]

Connected to #240

Seems we are no longer getting RC versions, so I reverted back to having single stable Dotty version.

[tgodzik]

I guess this will not be that easy after all :( I will take a further look tomorrow, but it seems that we are now printing full names with packages. If anyone wants to fix it today, you can just push to this PR with a fix.

[olafurpg]

Good to get this in

[mpilquist]

Is this related? scala/scala3#9716

[tgodzik]

@mpilquist might be, but that issue was also present in the previous versions, so it shouldn't actually change here 🤔

[mpilquist]

I just noticed this commit in community build -- trying it now: dotty-staging@1e90e97

Update: same failure with this commit applied.

[mpilquist]

Alright figured this one out -- nothing changed in Dotty w.r.t. showing type prefixes. The bug is that we need to change def isDotty in BaseSuite to account for the version number change.

[gabro]

Aha, nice catch @mpilquist!

[tgodzik]

Alright figured this one out -- nothing changed in Dotty w.r.t. showing type prefixes. The bug is that we need to change def isDotty in BaseSuite to account for the version number change.

Thanks! Good catch! I updated the PR and also changed the MacroCompat a bit based on the commit you mentioned before.

[tgodzik]

I will merge and release first thing tomorrow (just in case there is an issue) if no one objects.

[mpilquist]

Looks good to me. Once munit publishes, we'll be able to start building the various Typelevel libraries. The sooner the better but if you want to wait until tomorrow, that's great. :)

[gabro]

Nice 👏

[djspiewak]

Seems we are no longer getting RC versions, so I reverted back to having single stable Dotty version.

I definitely object. It's very very difficult for downstream projects to juggle incompatibilities as the ecosystem updates. Maintaining builds for the two most recent Dotty releases (whenever possible) makes this significantly easier since it allows libraries to take the upgrade in chunks, particularly if and when munit itself makes changes. Publishing for the latest two dotty releases ensures that users are able to split the upgrade pain into two steps: upgrade munit, then upgrade dotty.

Meanwhile, from the perspective of a library maintainer, not dropping the previous Dotty release is usually completely painless. Sometimes it has to be done, and particularly with ScalaJS shenanigans I can see merit to dropping 0.27.0-RC1, but I would strongly recommend that publication be for Mn and M(n-1) from this point forward. We're about to go through the most convoluted and painful cross-publication coordination effort in Scala's history; the least we can do is try to learn from what has made all of the other (otherwise simpler) migrations difficult at times.

[tgodzik]

Seems we are no longer getting RC versions, so I reverted back to having single stable Dotty version.

I definitely object. It's very very difficult for downstream projects to juggle incompatibilities as the ecosystem updates. Maintaining builds for the two most recent Dotty releases (whenever possible) makes this significantly easier since it allows libraries to take the upgrade in chunks, particularly if and when munit itself makes changes. Publishing for the latest two dotty releases ensures that users are able to split the upgrade pain into two steps: upgrade munit, then upgrade dotty.

Meanwhile, from the perspective of a library maintainer, not dropping the previous Dotty release is usually completely painless. Sometimes it has to be done, and particularly with ScalaJS shenanigans I can see merit to dropping 0.27.0-RC1, but I would strongly recommend that publication be for Mn and M(n-1) from this point forward. We're about to go through the most convoluted and painful cross-publication coordination effort in Scala's history; the least we can do is try to learn from what has made all of the other (otherwise simpler) migrations difficult at times.

I can add back 0.27.0-RC1 for sure, might have rushed with dropping it.

[olafurpg]

@tgodzik feel free to merge and release when this PR is ready!

[tgodzik]

@djspiewak I added back the 0.27.0-RC1 version. If everything runs ok, I will merge and release it if no one objects?