REPL packaging

[odersky]

We should make a command (I suggest doti) to launch the Dotty REPL.

[smarter]

What about having a dotty command instead which behaves similarly to scala ? (Running dotty without arguments brings up the REPL, running dotty Foo runs Foo.class with the correct bootclasspath and classpath).

[smarter]

DOPPLER could be the DOtty Precise Program LinkER /cc @DarkDimius :)

[smarter]

On the subject of running the REPL, we should also make sure that it can be run from sbt using sbt console and https://github.com/smarter/dotty-bridge, this require reimplementing https://github.com/sbt/sbt/blob/0.13/compile/interface/src/main/scala/xsbt/ConsoleInterface.scala and in particular this method:

def run(args: Array[String], bootClasspathString: String, classpathString: String,
  initialCommands: String, cleanupCommands: String, loader: ClassLoader,
  bindNames: Array[String], bindValues: Array[Any], log: Logger): Unit

which gives a good overview of the kind of things that the REPL needs to support.

[retronym]

Note that for the purposes of interactively testing out the REPL, you can use runMain ReplClass with a few custom settings:

fork in run := true

connectInput in run := true

outputStrategy in run := Some(StdoutOutput)

addCommandAlias("repl",   "repl/compile:runMain repl.Main -usejavacp")

See the Scala SBT build for more details.

[DarkDimius]

@retronym, thanks!

[felixmulder]

We currently have dotr and dotc for this. So I'm closing this issue, it might also be good to reference this issue here: #1526