build with sbt2

Author: bjaglin

.github/workflows/ci.yml

@@ -28,7 +28,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        scala: ["2.12", "3.6"]
+        scala: ["2.12"]
     name: Windows / Scala ${{ matrix.scala }}
     runs-on: windows-latest
     steps:

build.sbt

@@ -45,7 +45,7 @@ libraryDependencies ++= List(
 lazy val scala212 = "2.12.20" // bin/test-release.sh
 lazy val scala3 = "3.6.4" // bin/test-release.sh & .github/workflows/ci.yml
 
-scalaVersion := scala212
+scalaVersion := scala3
 crossScalaVersions := Seq(scala212, scala3)
 
 // keep this as low as possible to avoid running into binary incompatibility such as https://github.com/sbt/sbt/issues/5049
@@ -74,6 +74,7 @@ scalacOptions ++= {
   scalaBinaryVersion.value match {
     case "2.12" =>
       List(
+        "-Xsource:3",
         "-Ywarn-unused",
         "-Xlint",
         "-Xfatal-warnings"

project/build.properties

@@ -1 +1 @@
-sbt.version=1.10.7
+sbt.version=2.0.0-M4

project/plugins.sbt

@@ -1,12 +1,12 @@
 resolvers ++= Resolver.sonatypeOssRepos("public")
-addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.9.2")
+//addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.9.2")
 
 // dogfooding
 Compile / unmanagedSourceDirectories ++= {
   val root = (ThisBuild / baseDirectory).value.getParentFile / "src" / "main"
   List(
     root / "scala",
-    root / "scala-2.12"
+    root / "scala-3"
   )
 }
 libraryDependencies ++= Dependencies.all