Emit detect broken

[basarat]

Previously we had:

success : output.emitOutputStatus === ts.EmitReturnStatus.Succeeded;
emitOnly: !success && outputFiles.length

Now getEmitOutput only returns :

interface EmitOutput {
    outputFiles: OutputFile[];
    emitSkipped: boolean;
}

With only emitSkipped we don't know if it was a complete success i.e. a semantically valid emit or just a bland emit.

[basarat]

refs #179 (comment)

[basarat]

refs microsoft/TypeScript#2289

[DanielRosenwasser]

You can use the --noEmitOnError flag for this, even though the message says it only pertains to type checking.

[basarat]

@DanielRosenwasser I still want to get an emit. So did this : 02622f9#diff-578ff651be440fee29ecfe22d52e81a4L41