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package dotty.tools.dotc
import config.CompilerCommand
import core.Contexts.{Context, ContextBase}
import util.DotClass
import reporting._
import scala.util.control.NonFatal
abstract class Driver extends DotClass {
val prompt = "\ndotc> "
protected def newCompiler(): Compiler
protected def emptyReporter: Reporter = new StoreReporter(null)
protected def doCompile(compiler: Compiler, fileNames: List[String])(implicit ctx: Context): Reporter =
if (fileNames.nonEmpty)
try {
val run = compiler.newRun
run.compile(fileNames)
run.printSummary()
}
catch {
case ex: FatalError =>
ctx.error(ex.getMessage) // signals that we should fail compilation.
ctx.reporter
}
else emptyReporter
protected def initCtx = (new ContextBase).initialCtx
protected def sourcesRequired = true
def setup(args: Array[String], rootCtx: Context): (List[String], Context) = {
val summary = CompilerCommand.distill(args)(rootCtx)
implicit val ctx: Context = initCtx.fresh.setSettings(summary.sstate)
val fileNames = CompilerCommand.checkUsage(summary, sourcesRequired)
(fileNames, ctx)
}
def process(args: Array[String], rootCtx: Context): Reporter = {
val (fileNames, ctx) = setup(args, rootCtx)
doCompile(newCompiler(), fileNames)(ctx)
}
// We overload `process` instead of using a default argument so that we
// can easily call this method using reflection from `RawCompiler` in sbt.
def process(args: Array[String]): Reporter = {
process(args, initCtx)
}
def main(args: Array[String]): Unit = {
// Preload scala.util.control.NonFatal. Otherwise, when trying to catch a StackOverflowError,
// we may try to load it but fail with another StackOverflowError and lose the original exception,
// see <https://groups.google.com/forum/#!topic/scala-user/kte6nak-zPM>.
val _ = NonFatal
sys.exit(if (process(args).hasErrors) 1 else 0)
}
}
class FatalError(msg: String) extends Exception
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