compiles with Scala 3.0.0-M1 (tests missing)

- we're waiting for scala-test

Author: Sciss

.gitignore

@@ -30,3 +30,5 @@ scala-swing.iml
 .DS_Store
 
 target/
+/.bloop/
+/.bsp/

build.sbt

@@ -1,8 +1,8 @@
 lazy val scalaTestVersion = "3.2.2"
 
 lazy val commonSettings = Seq(
-  crossScalaVersions += "0.27.0-RC1",
-  scalaVersion := "0.27.0-RC1", // while working in IntelliJ
+  crossScalaVersions += "3.0.0-M1",
+  scalaVersion := "3.0.0-M1", // while working in IntelliJ
 )
 
 lazy val swing = project.in(file("."))
@@ -15,17 +15,20 @@ lazy val swing = project.in(file("."))
     scalaModuleMimaPreviousVersion := Some("2.1.0"),
     // set the prompt (for this build) to include the project id.
     ThisBuild / shellPrompt := { state => Project.extract(state).currentRef.project + "> " },
-    libraryDependencies ++= Seq(
-      "org.scalatest" %% "scalatest-flatspec"       % scalaTestVersion % Test,
-      "org.scalatest" %% "scalatest-shouldmatchers" % scalaTestVersion % Test,
-    ),
+    libraryDependencies ++= {
+      if (scalaVersion.value == "3.0.0-M1") Nil else
+      Seq(
+        "org.scalatest" %% "scalatest-flatspec"       % scalaTestVersion % Test,
+        "org.scalatest" %% "scalatest-shouldmatchers" % scalaTestVersion % Test,
+      )
+    },
     // Adds a `src/main/scala-2.13+` source directory for Scala 2.13 and newer
     // and  a `src/main/scala-2.13-` source directory for Scala version older than 2.13
     Compile / unmanagedSourceDirectories += {
       val sourceDir = (Compile / sourceDirectory).value
       CrossVersion.partialVersion(scalaVersion.value) match {
         case Some((2, n)) if n >= 13 => sourceDir / "scala-2.13+"
-        case Some((0, _))            => sourceDir / "scala-2.13+" // Dotty
+        case Some((3, _))            => sourceDir / "scala-2.13+" // Dotty
         case _                       => sourceDir / "scala-2.13-"
       }
     }

project/build.properties

@@ -1 +1 @@
-sbt.version=1.3.13
+sbt.version=1.4.2

project/plugins.sbt

@@ -1,2 +1,2 @@
-addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module" % "2.2.2")
-addSbtPlugin("ch.epfl.lamp"           % "sbt-dotty"        % "0.4.2")  // cross-compile for dotty
+addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module" % "2.2.3")
+addSbtPlugin("ch.epfl.lamp"           % "sbt-dotty"        % "0.4.5")  // cross-compile for dotty