Release procedure for 3.3.8-RC1

[tgodzik]

Release procedure for unstable version 3.3.8-RC1

• Publish artifacts to Maven via CI

  • Ensure scala-steward is blocking automatic upgrades for 3.3.8
  • On release-3.3.8 branch:
    • Create changelog file in changelogs/3.3.8-RC1.md
    • In project/Build.scala: Set baseVersion = "3.3.8-RC1" and ensure referenceVersion is set to stable version
    • In tasty/src/dotty/tools/tasty/TastyFormat.scala ensure MinorVersion is set to 3
    • In tasty/src/dotty/tools/tasty/TastyFormat.scala ensure ExperimentalVersion is set to stable (0)
    • Tag the branch as 3.3.8-RC1
    • Wait for CI to publish artifacts
    • Audit and release artifacts on https://central.sonatype.com/

• On lts-3.3 branch:

  • In project/Build.scala: Set referenceVersion to 3.3.8-RC1 chore: Update reference version to 3.3.8-RC1 scala3-lts#896
  • Check and update project/MiMaFilters.scala

• Wait for releases/confirmation from tooling:

  • Scala CLI - test
  • Scala Native - publish compiler plugin
  • Scastie - update available versions chore: Add latest LTS version scalacenter/scastie#1283
  • Scalameta Parser - test and update dialects to include new features on a new minor chore: Update Scala LTS version to latest scalameta/scalameta#4602
  • Metals - update tests and make sure new features are supported chore: Update Scala 3 LTS tests to 3.3.8 scalameta/metals#8351
  • Mdoc - update tests chore: Update LTS to 3.3.8 scalameta/mdoc#1088
  • Open Community Build
  • Scala Debug Adapter https://github.com/scalacenter/scala-debug-adapter/actions/runs/25378896591

• Prepare draft of announcement blogpost for 3.3.8 on https://docs.scala-lang.org/ docs: Add release notes for 3.3.8 scala-lang#1916

• Announce the release

  • Publish release on GitHub Releases (as pre-release)
  • Create tracking thread on https://contributors.scala-lang.org https://contributors.scala-lang.org/t/scala-3-3-8-lts-release-thread/7446

[xuwei-k]

• Backport "Cleanup compiler test. remove unnecessary isJavaAtLeast conditions" to 3.3 LTS scala3-lts#811
• https://github.com/scala/scala3/actions/runs/25066274144/job/73434167300#step:9:165

[info] compiling 37 Scala sources to /__w/scala3/scala3/scaladoc/../out/bootstrap/scaladoc/scala-3.3.8-RC1-bin-SNAPSHOT-nonbootstrapped/test-classes ...
Error:  -- [E008] Not Found Error: /__w/scala3/scala3/compiler/test/dotty/tools/io/ZipArchiveTest.scala:48:16 
Error:  48 |    ClassLoader.getPlatformClassLoader
Error:     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Error:     |    value getPlatformClassLoader is not a member of object ClassLoader

[tgodzik]

Yeah, I realized that we haven't been running the tests on JDK 8 on PRs. Fixing that today.

[tgodzik]

Second try https://github.com/scala/scala3/actions/runs/25117081030