Sbt cyclic project dependencies. Helps in tying projects together if they depend on eachother.

cyclic.sbt

internalDependencyClasspath in Compile in `play-cms-testing` += 
  interProjectDependency(`play-cms`, Compile).value
  
internalDependencyClasspath in Test in `play-cms` += 
  interProjectDependency(`play-cms-testing`, Compile).value

def interProjectDependency(project:Project, configuration:Configuration) = Def.task {
  Attributed.blank(
    (classDirectory in configuration in project)
      .map(identity) // convert the setting into a task
      .dependsOn(compile in configuration in project)
      .value
  )
}