scala.tools.nsc.IMain within Play 2.1

Question

I googled a lot and am totally stuck now. I know, that there are similar questions but please read to the end. I have tried all proposed solutions and none did work.

Answer 1

I wonder if the reflect jar is missing. Try adding this too in appDependencies.

"org.scala-lang" % "scala-reflect" % "2.10.0"

Answer 2

The problem here is that sbt doesnt add scala-library to the class path. The following workaround works. First create a folder lib in the top project directory(the parent of app,conf etc) and copy there the scala-library.jar

Then you can use the following code to host an interpreter :

      val settings = new Settings
      settings.bootclasspath.value +=scala.tools.util.PathResolver.Environment.javaBootClassPath + File.pathSeparator + "lib/scala-library.jar"
      val in = new IMain(settings){
            override protected def parentClassLoader = settings.getClass.getClassLoader()
      }
     val res = in.interpret("val x = 1")

The above creates the bootclasspath by adding to the java class the scala library. It's not a problem with play framework it comes from the sbt. The same problem occures for any scala project when it runs with sbt. Tested with a simple project. When it runs from eclipse its works fine.

EDIT: Link to sample project demonstrating the above.`