Scala 3/sbt 2 prep

.github/workflows/build-test.yml

@@ -20,7 +20,7 @@ jobs:
       java: 17, 11, 8
       scala: 2.12.20
       cmd: |
-        sbt ++$MATRIX_SCALA test ^scripted
+        sbt ++$MATRIX_SCALA test scripted
 
   finish:
     name: Finish

.github/workflows/format.yml

@@ -18,6 +18,6 @@ jobs:
           persist-credentials: false
 
       - name: Check project is formatted
-        uses: jrouly/scalafmt-native-action@v3
+        uses: jrouly/scalafmt-native-action@v4
         with:
           arguments: '--list --mode diff-ref=origin/main'

.scalafmt.conf

@@ -24,3 +24,8 @@ align.tokens."+" = [
     ]
   }
 ]
+fileOverride {
+  "glob:**/scala-3/**" {
+    runner.dialect = scala3
+  }
+}

build.sbt

@@ -11,6 +11,10 @@ developers += Developer(
   url("https://github.com/playframework")
 )
 
+lazy val scala212 = "2.12.20"
+lazy val scala3 = "3.3.4"
+ThisBuild / crossScalaVersions := Seq(scala212)
+
 libraryDependencies ++= Seq(
   "org.webjars" % "webjars-locator-core" % "0.59",
   "org.specs2" %% "specs2-core"          % "4.20.8" % "test",
@@ -26,3 +30,17 @@ Global / onLoad := (Global / onLoad).value.andThen { s =>
   dynverAssertTagVersion.value
   s
 }
+
+(pluginCrossBuild / sbtVersion) := {
+  scalaBinaryVersion.value match {
+    case "2.12" => "1.10.2"
+    case _      => "2.0.0-M2"
+  }
+}
+
+scalacOptions := {
+  CrossVersion.partialVersion(scalaVersion.value) match {
+    case Some((2, major)) => Seq("-Xsource:3")
+    case _                => Seq.empty
+  }
+}

src/main/scala-2.12/com/typesafe/sbt/PluginCompat.scala

@@ -0,0 +1,31 @@
+package com.typesafe.sbt
+
+import sbt.*
+import sbt.Keys.Classpath
+import xsbti.FileConverter
+
+import java.nio.file.{ Path => NioPath }
+
+private[sbt] object PluginCompat {
+  type FileRef = java.io.File
+  type Out = java.io.File
+
+  def toNioPath(a: Attributed[File])(implicit conv: FileConverter): NioPath =
+    a.data.toPath
+  def toFile(a: Attributed[File])(implicit conv: FileConverter): File =
+    a.data
+  def toNioPaths(cp: Seq[Attributed[File]])(implicit conv: FileConverter): Vector[NioPath] =
+    cp.map(_.data.toPath()).toVector
+  def toFiles(cp: Seq[Attributed[File]])(implicit conv: FileConverter): Vector[File] =
+    cp.map(_.data).toVector
+  def toSet[A](iterable: Iterable[A]): Set[A] = iterable.to[Set]
+  def classpathToFiles(classpath: Classpath)(implicit conv: FileConverter): Seq[FileRef] =
+    classpath.files
+  def toKey(settingKey: SettingKey[String]): AttributeKey[String] = settingKey.key
+  def toNioPath(f: File)(implicit conv: FileConverter): NioPath =
+    f.toPath
+  def toFile(f: File)(implicit conv: FileConverter): File = f
+  def toFileRef(f: File)(implicit conv: FileConverter): FileRef = f
+  def selectFirstPredicate: Seq[FileRef] => Boolean = files =>
+    files.forall(_.isFile) && files.map(_.hashString).distinct.size == 1
+}

src/main/scala-3/com/typesafe/sbt/PluginCompat.scala

@@ -0,0 +1,33 @@
+package com.typesafe.sbt
+
+import java.nio.file.{ Path => NioPath }
+import java.io.{ File => IoFile }
+import sbt.*
+import sbt.Keys.Classpath
+import xsbti.{ FileConverter, HashedVirtualFileRef, VirtualFile }
+
+private[sbt] object PluginCompat:
+  type FileRef = HashedVirtualFileRef
+  type Out = VirtualFile
+
+  def toNioPath(a: Attributed[HashedVirtualFileRef])(using conv: FileConverter): NioPath =
+    conv.toPath(a.data)
+  inline def toFile(a: Attributed[HashedVirtualFileRef])(using conv: FileConverter): File =
+    toNioPath(a).toFile
+  def toNioPaths(cp: Seq[Attributed[HashedVirtualFileRef]])(using conv: FileConverter): Vector[NioPath] =
+    cp.map(toNioPath).toVector
+  inline def toFiles(cp: Seq[Attributed[HashedVirtualFileRef]])(using conv: FileConverter): Vector[File] =
+    toNioPaths(cp).map(_.toFile)
+  def toSet[A](iterable: Iterable[A]): Set[A] = iterable.to(Set)
+  inline def classpathToFiles(classpath: Classpath)(using conv: FileConverter): Seq[File] =
+    toFiles(classpath.to(Seq))
+  inline def toKey(settingKey: SettingKey[String]): StringAttributeKey = StringAttributeKey(settingKey.key.label)
+  def toNioPath(hvf: HashedVirtualFileRef)(using conv: FileConverter): NioPath =
+    conv.toPath(hvf)
+  def toFile(hvf: HashedVirtualFileRef)(using conv: FileConverter): File =
+    toNioPath(hvf).toFile
+  inline def toFileRef(file: File)(using conv: FileConverter): FileRef =
+    conv.toVirtualFile(file.toPath)
+  inline def selectFirstPredicate(using conv: FileConverter): Seq[FileRef] => Boolean = files =>
+    files.forall(toFile(_).isFile) && files.map(_.contentHashStr).distinct.size == 1
+end PluginCompat