Add scripted scala3-scala-home

sbt/src/sbt-test/dependency-management/scala3-scala-home/build.sbt

@@ -0,0 +1,9 @@
+scalaVersion := "3.0.0-M2"
+
+val makeHome = taskKey[Unit]("Populates the 'home/lib' directory with Scala jars from the default ScalaInstance")
+
+makeHome := {
+	val lib = baseDirectory.value / "home" / "lib"
+	for(jar <- scalaInstance.value.allJars)
+		IO.copyFile(jar, lib / jar.getName)
+}

sbt/src/sbt-test/dependency-management/scala3-scala-home/changes/real-build.sbt

@@ -0,0 +1,11 @@
+scalaVersion := "3.0.0-M2"
+scalaHome := Some(baseDirectory.value / "home")
+
+val checkUpdate = taskKey[Unit]("Ensures that resolved Scala artifacts are replaced with ones from the configured Scala home directory")
+
+checkUpdate := {
+	val report = update.value
+	val lib = (scalaHome.value.get / "lib").getCanonicalFile
+	for(f <- report.allFiles)
+		assert(f.getParentFile == lib, "Artifact not in Scala home directory: " + f.getAbsolutePath)
+}

sbt/src/sbt-test/dependency-management/scala3-scala-home/test

@@ -0,0 +1,4 @@
+> makeHome
+$ copy-file changes/real-build.sbt build.sbt
+> reload
+> checkUpdate