Release 2.4.0

[SethTisue]

Motivations:

• support Scala Native 0.4.0 on 2.11, 2.12, 2.13 (Update for Scala Native 0.4.0 #387) /cc @ekrich
• restore Scala 3.0.0-M2 support (Scala 2.13.4 (was 2.13.3) #405)
• deal with @nowarn (Update 2.12's scala.annotation.nowarn once 2.12.13 is out #397, make @nowarn a ClassfileAnnotation, as in 2.12.13 #417)

Steps:

• merge PRs
• choose version number
  • let's call it 2.4.0, Scala Native support is a big deal, and 2.12.13 support is arguably a "feature" rather than a "fix"
• create the release and write the notes
  • https://github.com/scala/scala-collection-compat/releases/tag/v2.4.0
• wait for release build
  • https://travis-ci.com/github/scala/scala-collection-compat/builds/214738364
• release the staging repos
• artifacts on Maven Central
  • https://repo1.maven.org/maven2/org/scala-lang/modules/scala-collection-compat_3.0.0-M3/2.4.0/
  • https://repo1.maven.org/maven2/org/scala-lang/modules/scala-collection-compat_3.0.0-M2/2.4.0/
  • https://repo1.maven.org/maven2/org/scala-lang/modules/scala-collection-compat_2.13/2.4.0/
  • https://repo1.maven.org/maven2/org/scala-lang/modules/scala-collection-compat_2.12/2.4.0/
  • https://repo1.maven.org/maven2/org/scala-lang/modules/scala-collection-compat_2.11/2.4.0/
• post-release, bump version in README
  • 463ee20

[lolgab]

Is there any ETA for this release?
You should probably merge this one first.

[SethTisue]

If I don't get to it today, then early next week.

[lolgab]

@SethTisue Cool, thank you! 🙏

[SethTisue]

the 3.0.0-M2 artifacts haven't shown up on Maven Central, but the others have. hopefully it's just that some extra patience is needed...

[sideeffffect]

Is it possible that just because of some change from 2.3.2 to 2.4.0 I'm suddenly getting errors like this

[error] /home/runner/work/izumi-reflect/izumi-reflect/izumi-reflect/izumi-reflect/src/main/scala/izumi/reflect/internal/fundamentals/collections/IzMappings.scala:26:4: expected literal string as @nowarn annotation argument
[error]   @nowarn("msg=deprecated")
[error]    ^

?
zio/izumi-reflect#125

[ekrich]

Working for JVM and JS 2.11 - 3.0.0-M3 (no M2) and Native 2.11 - 2.13 for ekrich/sconfig. Thanks!

[SethTisue]

@sideeffffect presumably related to #417 — please open a ticket with details: what Scala version(s) are affected, whether it happens on JVM or JS or Native or all three, whether use of silencer might be a factor, etc etc, and we'll figure it out

[jodersky]

Would it be possible to also publish 2.4.0 for scala js 0.6?

[SethTisue]

@jodersky hmm, well I'd honestly really rather not. at least not unless it's creating some kind of serious roadblock for actual 0.6 users. is there a real need for 0.6 users not to just leave the dependency frozen at whatever version they're already on? most of the repos I'm involved with dropped 0.6 support a while ago

[jodersky]

It's not a huge problem, but for projects that cross-build, it does make the build matrix much more complex. The reason I asked was for unblocking com-lihaoyi/upickle#330, but in the end we were able to drop the dependency on scala-collection-compat altogether, so it's not an issue there anymore.

[SethTisue]

the 3.0.0-M2 artifacts haven't shown up on Maven Central, but the others have. hopefully it's just that some extra patience is needed...

nope. Sonatype just.... disappeared them, like mobsters disappearing a murder witness

or maybe I'm jumping to conclusions and there is somehow something wrong in the build? https://repo1.maven.org/maven2/org/scala-lang/modules/scala-collection-compat_sjs1_3.0.0-M2/2.4.0/ is also missing

over at https://travis-ci.com/github/scala/scala-collection-compat/builds/214738364 , I hit restart on both M2 jobs, which should make them publish again, to new staging repos

new logs:

• https://travis-ci.com/github/scala/scala-collection-compat/jobs/476713037
• https://travis-ci.com/github/scala/scala-collection-compat/jobs/476713038

aha! the jobs say M2 on them, but the artifacts say M3. I apologize to the Sonatype-American community.

let's take a closer look at https://travis-ci.com/github/scala/scala-collection-compat/jobs/476713037

it does have TRAVIS_SCALA_VERSION -> 3.0.0-M2

but then [info] compiling 19 Scala sources to /home/travis/build/scala/scala-collection-compat/.cross/compat30/jvm/target/scala-3.0.0-M3/test-classes ...

so I guess this has something to do with the weird way this repo is set up (#395 is where we complain about that)

and aha, build.sbt has lazy val scala30 = "3.0.0-M3" and it does val compatProject = "compat" + travisScalaVersion.get.binary + platformSuffix but otherwise ignores travisScalaVersion

okay, I'll PR a fix

[SethTisue]

#420 🌿

[SethTisue]

Because publishing is weird in this repo, I don't trust myself to attempt to back-publish, and anyway I want to be sure that full publishing is still working. So I'm going to roll 2.4.1: #422