delegate compilation info to sbt reporter

Author: MasseGuillaume

bridge/src/main/scala/xsbt/CompilerInterface.scala

@@ -50,12 +50,12 @@ class CachedCompilerImpl(args: Array[String], output: Output, resident: Boolean)
     (outputArgs ++ args.toList ++ sources.map(_.getAbsolutePath).sortWith(_ < _)).toArray[String]
 
   def run(sources: Array[File], changes: DependencyChanges, callback: AnalysisCallback, log: Logger, delegate: Reporter, progress: CompileProgress): Unit = synchronized {
-    run(sources.toList, changes, callback, log, progress)
+    run(sources.toList, changes, callback, log, delegate, progress)
   }
-  private[this] def run(sources: List[File], changes: DependencyChanges, callback: AnalysisCallback, log: Logger, compileProgress: CompileProgress): Unit = {
+  private[this] def run(sources: List[File], changes: DependencyChanges, callback: AnalysisCallback, log: Logger, delegate: Reporter, compileProgress: CompileProgress): Unit = {
     debug(log, args.mkString("Calling Dotty compiler with arguments  (CompilerInterface):\n\t", "\n\t", ""))
-    val ctx = (new ContextBase).initialCtx.fresh
-      .setSbtCallback(callback)
+    val freshContext = (new ContextBase).initialCtx.fresh
+    val ctx = freshContext.setSbtCallback(callback).setReporter(DelegatingReporter(delegate))
     val cl = getClass.getClassLoader.asInstanceOf[URLClassLoader]
 
     val reporter = DottyMain.process(commandArguments(sources.toArray), ctx)

bridge/src/main/scala/xsbt/DelegatingReporter.scala

@@ -0,0 +1,64 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2008, 2009 Mark Harrah
+ */
+package xsbt
+
+import dotty.tools._
+import dotc._
+import reporting._
+import core.Contexts._
+
+import xsbti.Maybe
+
+object DelegatingReporter {
+  def apply(delegate: xsbti.Reporter) = new DelegatingReporter(delegate)
+}
+
+final class DelegatingReporter(delegate: xsbti.Reporter) extends Reporter
+  with UniqueMessagePositions
+  with HideNonSensicalMessages {
+
+  def doReport(d: Diagnostic)(implicit ctx: Context): Unit = {
+    val severity = 
+      d match {
+        case _: Reporter.Error   => xsbti.Severity.Error
+        case _: Reporter.Warning => xsbti.Severity.Warn
+        case _                   => xsbti.Severity.Info
+      }
+    val pos  = 
+      if(d.pos.exists) Some(d.pos)
+      else None
+
+    val file = 
+      if(d.pos.source.file.exists) {
+        val r = d.pos.source.file.file 
+        if(r == null) None
+        else Some(r)
+      }
+      else None
+
+    val offset0 = pos.map(_.point)
+
+    val position = new xsbti.Position {
+      def line: Maybe[Integer] = maybe(pos.map(_.line))
+      def lineContent(): String = pos.map(_.lineContent).getOrElse("")
+      def offset(): xsbti.Maybe[Integer] = maybeInt(offset0)
+      def pointer(): xsbti.Maybe[Integer] = offset()
+      def pointerSpace(): xsbti.Maybe[String] = maybe(offset0.map(" " * _))
+      def sourceFile(): xsbti.Maybe[java.io.File] = maybe(file)
+      def sourcePath(): xsbti.Maybe[String] = maybe(file.map(_.getPath))
+    }
+
+    delegate.log(position, d.message, severity)
+  }
+
+  private[this] def maybe[T](opt: Option[T]): Maybe[T] = opt match { 
+    case None => Maybe.nothing[T]
+    case Some(s) => Maybe.just[T](s)
+  }
+  import java.lang.{ Integer => I }
+  private[this] def maybeInt(opt: Option[Int]): Maybe[I] = opt match { 
+    case None => Maybe.nothing[I]
+    case Some(s) => Maybe.just[I](s)
+  }
+}