object scala in compiler mirror not found - running Scala compiler programmatically

Question

Running w/ a simple SBT project w/ Java 7 (details below) and invoking sbt run at the command line (no IntelliJ or anything)

source

impo         


        

Answer 1

This is the one where you have to say:

trait Probe

object Playground extends App {
  //val compiler = new Global(new Settings())
  val s = new Settings()
  s.embeddedDefaults[Probe]
  val compiler = new Global(s)
  val testFiles = List("Test.scala")
  val runner = new compiler.Run()
  val result = runner.compile(testFiles)
  println(result)
}

That took me a couple of minutes. That method name, "embeddedDefaults", is as cryptic as any to come out of sbt.

The comment on MutableSettings (which suggests a side effect):

  /** Initializes these settings for embedded use by type `T`.
  * The class loader defining `T` should provide resources `app.class.path`
  * and `boot.class.path`.  These resources should contain the application
  * and boot classpaths in the same form as would be passed on the command line.*/

The indentation is as in the source code.