v0.10.0-RC1

Significant changes since v0.9.34

For users

When loading external rules, Scalafix now verifies whether conditions are held to guarantee compatibility. It will therefore prevent rules built with a future version of Scalafix to be loaded, and issue a warning when rules built with an older, potentially non-compatible version of Scalafix are loaded.

The latter means that you will see a warning when loading any external rule available as of today, for example with OrganizeImports v0.6.0:

[info] Loading external rule(s) built against an old version of Scalafix (0.9.31).
[info] This might not be a problem, but in case you run into unexpected behavior, you
[info] should try a more recent version of the rules(s) if available. If that does
[info] not help, request the rule(s) maintainer to build against Scalafix 0.10.0-RC1
[info] or later, and downgrade Scalafix to 0.9.x (x>=31) for the time being.

Note that most community rules (including OrganizeImports) will work just fine despite this warning as the breaking changes in 0.10.x are very limited.

For rule authors

• Compatibility considerations have been documented.
• For this release, the following updates to Scalafix dependencies bring backward-incompatible changes:
  • Scalameta 4.5.x brings
    • API deprecations & removals (scalameta/scalameta#2591 & scalameta/scalameta#2582)
    • a tree parsing update (scalameta/scalameta#2601, see typelevel/simulacrum-scalafix#194 (comment))
  • metaconfig 0.10.0 now relies on an inlined metaconfig-pprint to limit the impact of a breaking change in com.lihaoyi::pprint:0.7.0 (see com-lihaoyi/PPrint#72 & scalameta/metaconfig#154). External rules had no reason to directly use the PPrint classes, but internal usage of PPrint in metaconfig's derive* macros (used for the configuration case classes) means that a recompilation is needed.
    • At runtime, scalafix-cli:0.10.x brings com.lihaoyi::pprint:0.6.6 so that configurable rules compiled against scalafix-core:0.9.x can run
    • However, note that configurable rules compiled against scalafix-core:0.10.x will cause cryptic runtime failures with scalafix-cli:0.9.x, so you should reflect that with a major bump when releasing your rule built against scalafix-core:0.10.x, and ideally a message describing your compatibility matrix.

Pull Requests

• Update scalafmt-core to 3.5.0 (#1587) @scala-steward
• Update scala-collection-compat to 2.7.0 (#1585) @scala-steward
• Update scalameta, semanticdb-scalac-core, ... to 4.5.2 (#1586) @scala-steward
• Fix typos in the CONTRIBUTING.md (#1584) @danicheg
• Tweak bincompat doc/logs ahead of 0.10.0-RC1 release (#1577) @bjaglin
• change logo (#1580) @mlachkar
• Add new Scalafix logo (#1575) @bishabosha
• Update mdoc, sbt-mdoc to 2.3.2 (#1579) @scala-steward
• all scala 2.x patch releases are supported (#1576) @bjaglin
• remove hidden page included in tutorial (#1564) @bjaglin
• define & apply binary compatibility strategy (#1565) @bjaglin
• Update scalameta, semanticdb-scalac-core, ... to 4.5.1 (#1570) @scala-steward
• never wait to bump scalameta (#1569) @bjaglin
• fix steward pinning (#1567) @bjaglin
• Small refactoring of explicitResultTypes (#1439) @mlachkar
• better error for external rules ran with old scalafix-cli version (#1562) @bjaglin
• Bump actions/checkout from 2 to 3 (#1561) @dependabot
• Update sbt-buildinfo to 0.11.0 (#1558) @scala-steward
• Update mdoc, sbt-mdoc to 2.3.1 (#1559) @scala-steward
• RemoveUnused: support nested Pat.Bind (#1557) @bjaglin
• Scalameta 4.5.0 (was 4.4.35) (#1556) @SethTisue
• fix docs (#1554) @bjaglin
• remove unused plugin (#1553) @bjaglin
• fix docs: reflect new param signature after #907 (#1547) @bjaglin
• Update scalafmt-core to 3.4.3 (#1551) @scala-steward
• Update scalameta, semanticdb-scalac-core, ... to 4.4.35 (#1552) @scala-steward
• Update scala3-library to 3.1.1 (#1549) @scala-steward
• Update sbt to 1.6.2 (#1550) @scala-steward
• Update mdoc, sbt-mdoc to 2.3.0 (#1531) @scala-steward
• force usage of shaded TPrint (#1546) @bjaglin
• Update metaconfig-docs to 0.10.0 (#1530) @scala-steward
• attempt at fixing versions in user-facing docs (#1544) @bjaglin
• overhaul community rules page (#1540) @bjaglin
• reflect organization change (#1541) @bjaglin
• Update named-literal-rules (#1529) @mlachkar
• Update scalameta, semanticdb-scalac-core, ... to 4.4.33 (#1533) @scala-steward
• Update scalafmt-core to 3.3.3 (#1532) @scala-steward
• Update scalafmt-core to 3.3.1 (#1524) @scala-steward
• Update sbt-scoverage to 1.9.3 (#1525) @scala-steward
• Update sbt to 1.6.1 (#1523) @scala-steward
• post 0.9.34 release (#1527) @bjaglin