build.sbt

lazy val stage = taskKey[File]("stage")

val allProjectCompiles = ScopeFilter(inAnyProject, inConfigurations(Compile))

lazy val dev = crossProject(JVMPlatform, NativePlatform)
  .crossType(CrossType.Full)
  .withoutSuffixFor(JVMPlatform)
  .settings(
    scalaVersion := "2.11.12",
    libraryDependencies += "org.scalactic" %% "scalactic" % "3.0.5",
    libraryDependencies += "com.outr" %%% "scribe" % "2.5.0",
    libraryDependencies += "com.lihaoyi" %%% "fastparse" % "1.0.0",
    logBuffered in Test := false
  ).jvmSettings(
    libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.5" % Test,
    libraryDependencies += "org.scalacheck" %% "scalacheck" % "1.14.0" % Test
  ).nativeSettings(
    nativeLinkStubs := true
  )

lazy val devJvm = dev.jvm
lazy val devNative = dev.native

lazy val root = (project in file("."))
  .aggregate(devJvm, devNative)
  .settings(
    aggregate in run := false,
    aggregate in test := false,

    run := {
      (run in (devNative, Compile)).evaluated
    },

    test := {
      (test in (devJvm, Test)).value
    },

    stage := {
      import java.nio.file._

      test.value

      val allNativeBins = (nativeLink in (devNative, Compile)).all(allProjectCompiles).value

      val stageDir = target.value / "universal" / "stage" / "bin"
      IO.createDirectory(stageDir)

      allNativeBins foreach { nativeBin =>
        val src = nativeBin
        val dst = stageDir / nativeBin.base
        Files.copy(src.toPath,
                  dst.toPath,
                  StandardCopyOption.REPLACE_EXISTING)
      }

      stageDir
    }
  )