build with and test against Scala 3.6.2

Keep building for Scala 3.5 until the next minor version for backward
compatibility.

Author: bjaglin

build.sbt

@@ -30,8 +30,11 @@ lazy val interfaces = project
       props.put("scalafixVersion", version.value)
       props.put("scalafixStableVersion", stableVersion.value)
       props.put("scalametaVersion", scalametaV)
-      props.put("scala213", scala213)
       props.put("scala212", scala212)
+      props.put("scala213", scala213)
+      props.put("scala33", scala33)
+      props.put("scala35", scala35)
+      props.put("scala36", scala36)
       props.put("scala3LTS", scala3LTS)
       props.put("scala3Next", scala3Next)
       val out =

project/Dependencies.scala

@@ -7,8 +7,11 @@ import sbt._
 object Dependencies {
   val scala212 = sys.props.getOrElse("scala212.nightly", "2.12.20")
   val scala213 = sys.props.getOrElse("scala213.nightly", "2.13.15")
-  val scala3Next = sys.props.getOrElse("scala3.nightly", "3.5.2")
-  val scala3LTS = "3.3.4"
+  val scala33 = "3.3.4"
+  val scala35 = "3.5.2"
+  val scala36 = "3.6.2"
+  val scala3LTS = scala33
+  val scala3Next = sys.props.getOrElse("scala3.nightly", scala36)
 
   val bijectionCoreV = "0.9.8"
   val collectionCompatV = "2.12.0"

project/Mima.scala

@@ -9,7 +9,10 @@ object Mima {
       ProblemFilters.exclude[Problem]("scalafix.internal.*"),
       ProblemFilters.exclude[Problem]("scala.meta.internal.*"),
       // Exceptions
-      ProblemFilters.exclude[DirectMissingMethodProblem]("scalafix.v0.Signature#Self.syntax")
+      ProblemFilters.exclude[DirectMissingMethodProblem]("scalafix.v0.Signature#Self.syntax"),
+      ProblemFilters.exclude[ReversedMissingMethodProblem]("scalafix.interfaces.Scalafix.scala33"),
+      ProblemFilters.exclude[ReversedMissingMethodProblem]("scalafix.interfaces.Scalafix.scala35"),
+      ProblemFilters.exclude[ReversedMissingMethodProblem]("scalafix.interfaces.Scalafix.scala36")
     )
   }
 }

project/ScalafixBuild.scala

@@ -33,7 +33,14 @@ object ScalafixBuild extends AutoPlugin with GhpagesKeys {
 
     // https://github.com/scalameta/scalameta/issues/2485
     lazy val coreScalaVersions = Seq(scala212, scala213)
-    lazy val cliScalaVersions = Seq(scala212, scala213, scala3LTS, scala3Next)
+    lazy val cliScalaVersions = Seq(
+      scala212,
+      scala213,
+      scala33,
+      scala35,
+      scala36,
+      scala3Next
+    ).distinct
     lazy val cliScalaVersionsWithTargets: Seq[(String, TargetAxis)] =
       cliScalaVersions.map(sv => (sv, TargetAxis(sv))) ++
         Seq(scala213, scala212).flatMap { sv =>
@@ -138,6 +145,9 @@ object ScalafixBuild extends AutoPlugin with GhpagesKeys {
         "supportedScalaVersions" -> cliScalaVersions,
         "scala212" -> scala212,
         "scala213" -> scala213,
+        "scala33" -> scala33,
+        "scala35" -> scala35,
+        "scala36" -> scala36,
         "scala3LTS" -> scala3LTS,
         "scala3Next" -> scala3Next,
         sbtVersion
@@ -230,8 +240,9 @@ object ScalafixBuild extends AutoPlugin with GhpagesKeys {
     developers ++= Developers.list
   )
 
-  private val PreviousScalaVersion: Map[String, String] = Map(
-    "3.5.2" -> "3.5.1"
+  private val PreviousScalaVersion: Map[String, Option[String]] = Map(
+    "3.5.2" -> Some("3.5.1"),
+    "3.6.2" -> None
   )
 
   override def buildSettings: Seq[Setting[_]] = List(
@@ -270,15 +281,15 @@ object ScalafixBuild extends AutoPlugin with GhpagesKeys {
     // avoid "missing dependency" on artifacts with full scala version when bumping scala
     versionPolicyIgnored ++= {
       PreviousScalaVersion.get(scalaVersion.value) match {
-        case Some(previous) =>
+        case Some(Some(previous)) =>
           // all transitive dependencies with full scala version we know about
           Seq(
             "org.scalameta" % s"semanticdb-scalac-core_$previous",
             "ch.epfl.scala" % s"scalafix-cli_$previous",
             "ch.epfl.scala" % s"scalafix-reflect_$previous",
             "ch.epfl.scala" % s"scalafix-rules_$previous"
           )
-        case None => Seq()
+        case _ => Seq()
       }
     },
     versionPolicyIntention := Compatibility.BinaryCompatible,
@@ -309,16 +320,23 @@ object ScalafixBuild extends AutoPlugin with GhpagesKeys {
     ),
     mimaPreviousArtifacts := {
       val currentScalaFullV = scalaVersion.value
-      val previousScalaFullV =
-        PreviousScalaVersion.getOrElse(currentScalaFullV, currentScalaFullV)
-      val previousScalaVCrossName = CrossVersion(
-        crossVersion.value,
-        previousScalaFullV,
-        scalaBinaryVersion.value
-      ).getOrElse(identity[String] _)(moduleName.value)
-      Set(
-        organizationName.value % previousScalaVCrossName % stableVersion.value
-      )
+      val maybePreviousScalaFullV =
+        PreviousScalaVersion.get(currentScalaFullV) match {
+          case Some(Some(previous)) => Some(previous)
+          case None => Some(currentScalaFullV)
+          case _ => None
+        }
+
+      maybePreviousScalaFullV.fold(Set.empty[ModuleID]) { previousScalaFullV =>
+        val previousScalaVCrossName = CrossVersion(
+          crossVersion.value,
+          previousScalaFullV,
+          scalaBinaryVersion.value
+        ).getOrElse(identity[String] _)(moduleName.value)
+        Set(
+          organizationName.value % previousScalaVCrossName % stableVersion.value
+        )
+      }
     },
     mimaBinaryIssueFilters ++= Mima.ignoredABIProblems
   )

scalafix-cli/src/main/scala/scalafix/internal/interfaces/ScalafixImpl.scala

@@ -34,6 +34,12 @@ final class ScalafixImpl extends Scalafix {
     Versions.scala212
   override def scala213(): String =
     Versions.scala213
+  override def scala33(): String =
+    Versions.scala33
+  override def scala35(): String =
+    Versions.scala35
+  override def scala36(): String =
+    Versions.scala36
   override def scala3LTS(): String =
     Versions.scala3LTS
   override def scala3Next(): String =

scalafix-interfaces/src/main/java/scalafix/interfaces/Scalafix.java

@@ -70,6 +70,21 @@ public interface Scalafix {
      */
     String scala213();
 
+    /**
+     * The Scala 3.3 version in {@link #supportedScalaVersions()}
+     */
+    String scala33();
+
+    /**
+     * The Scala 3.5 version in {@link #supportedScalaVersions()}
+     */
+    String scala35();
+
+    /**
+     * The Scala 3.6 version in {@link #supportedScalaVersions()}
+     */
+    String scala36();
+
     /**
      * The Scala 3 LTS version in {@link #supportedScalaVersions()}
      */
@@ -135,7 +150,11 @@ static Scalafix fetchAndClassloadInstance(String requestedScalaVersion, List<Rep
             requestedScalaMajorMinorOrMajorVersion.equals("3.1") ||
             requestedScalaMajorMinorOrMajorVersion.equals("3.2") ||
             requestedScalaMajorMinorOrMajorVersion.equals("3.3")) {
-            scalaVersionKey = "scala3LTS";
+            scalaVersionKey = "scala33";
+        } else if (requestedScalaMajorMinorOrMajorVersion.equals("3.5")) {
+            scalaVersionKey = "scala35";
+        } else if (requestedScalaMajorMinorOrMajorVersion.equals("3.6")) {
+            scalaVersionKey = "scala36";
         } else if (requestedScalaMajorMinorOrMajorVersion.startsWith("3")) {
             scalaVersionKey = "scala3Next";
         } else {

scalafix-tests/input/src/main/scala-3next/test/explicitResultTypes/Scala3_6OrGreater.scala

@@ -0,0 +1,15 @@
+/*
+rules = ExplicitResultTypes
+ExplicitResultTypes.skipSimpleDefinitions = false
+*/
+package test.explicitResultTypes
+
+trait Order[T]:
+  extension (values: Seq[T]) def toSorted: Seq[T] = ???
+  def compare(x: T, y: T): Int
+
+given Order[Int]:
+  def compare(x: Int, y: Int) = ???
+
+given listOrdering: [T: Order as elementOrder] => Order[List[T]]:
+  def compare(x: List[T], y: List[T]) = elementOrder.compare(x.head, y.head)

scalafix-tests/integration/src/test/scala/scalafix/tests/interfaces/ScalafixSuite.scala

@@ -43,6 +43,9 @@ class ScalafixSuite extends AnyFunSuite {
     assert(api.scalametaVersion() == Versions.scalameta)
     assert(api.scala212() == Versions.scala212)
     assert(api.scala213() == Versions.scala213)
+    assert(api.scala33() == Versions.scala33)
+    assert(api.scala35() == Versions.scala35)
+    assert(api.scala36() == Versions.scala36)
     assert(api.scala3LTS() == Versions.scala3LTS)
     assert(api.scala3Next() == Versions.scala3Next)
     assert(
@@ -113,13 +116,23 @@ class ScalafixSuite extends AnyFunSuite {
     assert(scalafixAPI.scalaVersion() == Versions.scala3LTS)
   }
 
-  test("classload Scala 3 Next with full post-LTS version") {
-    val scalafixAPI = Scalafix.fetchAndClassloadInstance("3.4.0", repositories)
-    assert(scalafixAPI.scalaVersion() == Versions.scala3Next)
+  test("classload Scala 3.5 with full version") {
+    val scalafixAPI = Scalafix.fetchAndClassloadInstance("3.5.2", repositories)
+    assert(scalafixAPI.scalaVersion() == Versions.scala35)
   }
 
-  test("classload Scala 3 Next with major.minor post-LTS version") {
+  test("classload Scala 3.5 with major.minor version") {
     val scalafixAPI = Scalafix.fetchAndClassloadInstance("3.5", repositories)
+    assert(scalafixAPI.scalaVersion() == Versions.scala35)
+  }
+
+  test("classload Scala 3 Next with full version") {
+    val scalafixAPI = Scalafix.fetchAndClassloadInstance("3.6.2", repositories)
+    assert(scalafixAPI.scalaVersion() == Versions.scala3Next)
+  }
+
+  test("classload Scala 3 Next with major.minor version") {
+    val scalafixAPI = Scalafix.fetchAndClassloadInstance("3.6", repositories)
     assert(scalafixAPI.scalaVersion() == Versions.scala3Next)
   }
 

scalafix-tests/output/src/main/scala-3next/test/explicitResultTypes/Scala3_6OrGreater.scala

@@ -0,0 +1,11 @@
+package test.explicitResultTypes
+
+trait Order[T]:
+  extension (values: Seq[T]) def toSorted: Seq[T] = ???
+  def compare(x: T, y: T): Int
+
+given Order[Int]:
+  def compare(x: Int, y: Int): Int = ???
+
+given listOrdering: [T: Order as elementOrder] => Order[List[T]]:
+  def compare(x: List[T], y: List[T]): Int = elementOrder.compare(x.head, y.head)

scalafix-tests/unit/src/test/scala/scalafix/tests/cli/InterfacesPropertiesSuite.scala

@@ -25,6 +25,9 @@ class InterfacesPropertiesSuite extends AnyFunSuite with BeforeAndAfterAll {
   check("scalametaVersion", Versions.scalameta)
   check("scala212", Versions.scala212)
   check("scala213", Versions.scala213)
+  check("scala33", Versions.scala33)
+  check("scala35", Versions.scala35)
+  check("scala36", Versions.scala36)
   check("scala3LTS", Versions.scala3LTS)
   check("scala3Next", Versions.scala3Next)