Question

Is it possible to configure SBT to use a completely different library version when cross building, depending on the scala version the project is being built with?

For example:

• When building with Scala 2.9.2 I want to use "org.scalatest" % "scalatest_2.9.2" % "2.0.M5" % "test"
• When building with scala 2.10.0 I want to use "org.scalatest" % "scalatest_2.10.0-RC5" % "2.0.M5-B1" % "test"

Answer 1

Something like this should work:

libraryDependencies <+= scalaVersion(scalatestDependency(_))

def scalatestDependency(scalaVersion: String) = scalaVersion match {
  case "2.9.2" => "org.scalatest" % "scalatest_2.9.2" % "2.0.M5" % "test"
  case "2.10.0" => "org.scalatest" % "scalatest_2.10.0-RC5" % "2.0.M5-B1" % "test"
}

I assumed that you actually meant that the library versions should be the other way around? 🙂

You can see variations on this theme in the ScalaMock 2 build.