Add initial compilation functionality to ParallelTesting trait

1 files changed, 41 insertions, 0 deletions

diff --git a/compiler/test/dotty/tools/dotc/ParallelTesting.scala b/compiler/test/dotty/tools/dotc/ParallelTesting.scala
new file mode 100644
index 000000000..5df9e2e3d
--- /dev/null
+++ b/compiler/test/dotty/tools/dotc/ParallelTesting.scala
@@ -0,0 +1,41 @@
+package dotty
+package tools
+package dotc
+
+import java.io.{ File => JFile }
+import scala.io.Source
+
+import core.Contexts._
+import reporting.{ Reporter, UniqueMessagePositions, HideNonSensicalMessages, MessageRendering }
+import reporting.diagnostic.MessageContainer
+import interfaces.Diagnostic.ERROR
+import java.nio.file.StandardCopyOption.REPLACE_EXISTING
+import java.nio.file.{ Files, Path, Paths }
+
+trait ParallelTesting {
+
+  private val driver = new Driver {
+    override def newCompiler(implicit ctx: Context) = new Compiler
+  }
+
+  private class DaftReporter(suppress: Boolean)
+  extends Reporter with UniqueMessagePositions with HideNonSensicalMessages
+  with MessageRendering {
+    private var _errors: List[MessageContainer] = Nil
+    def errors = _errors
+
+    override def doReport(m: MessageContainer)(implicit ctx: Context) = {
+      if (!suppress && m.level == ERROR) {
+        _errors = m :: _errors
+        System.err.println(messageAndPos(m.contained, m.pos, diagnosticLevel(m)))
+      }
+    }
+  }
+
+  private def compile(files: Array[JFile], flags: Array[String]): (Array[JFile], List[MessageContainer]) = {
+    val reporter = new DaftReporter(suppress = false)
+    driver.process(flags ++ files.map(_.getAbsolutePath), reporter = reporter)
+    files -> reporter.errors
+  }
+
+}