3.8.0-RC3 release procedure

[WojciechMazur]

• Publish artifacts to Maven via CI

  • Ensure scala-steward is blocking automatic upgrades for 3.8.0
  • On release-3.8.0 branch:
    • Create changelog file in changelogs/3.8.0-RC3.md
    • In project/Build.scala: Set baseVersion = "3.8.0-RC3"
    • In tasty/src/dotty/tools/tasty/TastyFormat.scala ensure MinorVersion is set to 8
    • In tasty/src/dotty/tools/tasty/TastyFormat.scala ensure ExperimentalVersion is set to experimental (1 or higher)
    • Tag the branch as 3.8.0-RC3
    • Wait for CI to publish artifacts
    • Audit and release artifacts on https://central.sonatype.com/

• On main branch:

  • In project/Build.scala: Set referenceVersion to 3.8.0-RC3 [chore] Set reference compiler version to 3.8.0-RC3 #24662
  • Check and update project/MiMaFilters.scala

• Wait for releases/confirmation from tooling:

  • Scala CLI - test: Bump Scala 3 Next RC to 3.8.0-RC3 VirtusLab/scala-cli#3991
  • Scala Native - publish compiler plugin
  • Mdoc
  • Scastie - update available versions
  • Scalameta Parser - test
  • Open Community Build

• Announce the release

  • Publish release on GitHub Releases (as pre-release)
  • Update tracking thread on https://contributors.scala-lang.org