sbt bridge reporter

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

@@ -50,12 +50,14 @@ 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)
+      .setReporter(new 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 +1,58 @@
+/* sbt -- Simple Build Tool
+ * Copyright 2008, 2009 Mark Harrah
+ */
+package xsbt
+
+import dotty.tools._
+import dotc._
+import reporting._
+import core.Contexts._
+
+import xsbti.{Maybe, Position}
+
+final class DelegatingReporter(delegate: xsbti.Reporter) extends Reporter
+  with UniqueMessagePositions
+  with HideNonSensicalMessages {
+
+  override def printSummary(implicit ctx: Context): Unit = delegate.printSummary()
+
+  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) Option(d.pos.source.file.file)
+      else None
+
+    val offset0 = pos.map(_.point)
+
+    val position = new Position {
+      def line: Maybe[Integer] = maybe(pos.map(_.line))
+      def lineContent: String = pos.map(_.lineContent).getOrElse("")
+      def offset: Maybe[Integer] = maybeInt(offset0)
+      def pointer: Maybe[Integer] = offset
+      def pointerSpace: Maybe[String] = maybe(offset0.map(" " * _))
+      def sourceFile: Maybe[java.io.File] = maybe(file)
+      def sourcePath: 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)
+  }
+}

bridge/src/sbt-test/compilerReporter/simple/Source.scala

@@ -0,0 +1,10 @@
+trait A
+trait B
+
+trait Wr {
+  val z: A with B
+}
+
+object Er {
+  val a = er1
+}

bridge/src/sbt-test/compilerReporter/simple/build.sbt

@@ -0,0 +1 @@
+Reporter.checkSettings

bridge/src/sbt-test/compilerReporter/simple/project/DottyInjectedPlugin.scala

@@ -0,0 +1,17 @@
+import sbt._
+import Keys._
+
+object DottyInjectedPlugin extends AutoPlugin {
+  override def requires = plugins.JvmPlugin
+  override def trigger = allRequirements
+
+  override val projectSettings = Seq(
+    scalaVersion := "0.1-SNAPSHOT",
+    scalaOrganization := "ch.epfl.lamp",
+    scalacOptions += "-language:Scala2",
+    scalaBinaryVersion  := "2.11",
+    autoScalaLibrary := false,
+    libraryDependencies ++= Seq("org.scala-lang" % "scala-library" % "2.11.5"),
+    scalaCompilerBridgeSource := ("ch.epfl.lamp" % "dotty-bridge" % "0.1.1-SNAPSHOT" % "component").sources()
+  )
+}

bridge/src/sbt-test/compilerReporter/simple/project/Reporter.scala

@@ -0,0 +1,44 @@
+import sbt._
+import Keys._
+import KeyRanks.DTask
+
+object Reporter {
+  import xsbti.{Reporter, Problem, Position, Severity, Maybe}
+
+  lazy val check = TaskKey[Unit]("check", "make sure compilation info are forwared to sbt")
+
+  // compilerReporter is marked private in sbt
+  lazy val compilerReporter = TaskKey[Option[xsbti.Reporter]]("compilerReporter", "Experimental hook to listen (or send) compilation failure messages.", DTask)
+
+  lazy val reporter = 
+    Some(new xsbti.Reporter {
+      private val buffer = collection.mutable.ArrayBuffer.empty[Problem]
+      def reset(): Unit = buffer.clear()
+      def hasErrors: Boolean = buffer.exists(_.severity == Severity.Error)
+      def hasWarnings: Boolean = buffer.exists(_.severity == Severity.Warn)
+      def printSummary(): Unit = println(problems.mkString(System.lineSeparator))
+      def problems: Array[Problem] = buffer.toArray
+      def log(pos: Position, msg: String, sev: Severity): Unit = {
+        object MyProblem extends Problem {
+          def category: String = null
+          def severity: Severity = sev
+          def message: String = msg
+          def position: Position = pos
+          override def toString = s"custom: $position:$severity: $message"
+        }
+        buffer.append(MyProblem)
+      }
+      def comment(pos: xsbti.Position, msg: String): Unit = ()
+    })
+
+  lazy val checkSettings = Seq(
+    compilerReporter in (Compile, compile) := reporter,
+    check <<= (compile in Compile).mapFailure( _ => {
+      val problems = reporter.get.problems
+      println(problems.toList)
+      assert(problems.size == 2)
+      assert(problems.count(_.severity == Severity.Error) == 1) // not found: er1,
+      assert(problems.count(_.severity == Severity.Warn) == 1)  // `with' as a type operator has been deprecated; use `&' instead,
+    })
+  )
+}

bridge/src/sbt-test/compilerReporter/simple/test

@@ -0,0 +1 @@
+> check

project/Build.scala

@@ -207,11 +207,31 @@ object DottyBuild extends Build {
     ).
     settings(publishing)
 
+  // until sbt/sbt#2402 is fixed (https://github.com/sbt/sbt/issues/2402)
+  lazy val cleanSbtBridge = TaskKey[Unit]("cleanSbtBridge", "delete dotty-sbt-bridge cache")
+
   lazy val `dotty-bridge` = project.in(file("bridge")).
     dependsOn(dotty).
     settings(
       overrideScalaVersionSetting,
 
+      cleanSbtBridge := {
+        val dottyBridgeVersion = version.value
+        val dottyVersion = (version in dotty).value
+        val classVersion = System.getProperty("java.class.version")
+
+        val sbtV = sbtVersion.value
+        val sbtOrg = "org.scala-sbt"
+        val sbtScalaVersion = "2.10.6"
+
+        val home = System.getProperty("user.home")
+        val org = organization.value
+        val artifact = moduleName.value
+
+        IO.delete(file(home) / ".ivy2" / "cache" / sbtOrg / s"$org-$artifact-$dottyBridgeVersion-bin_${dottyVersion}__$classVersion")
+        IO.delete(file(home) / ".sbt"  / "boot" / s"scala-$sbtScalaVersion" / sbtOrg / "sbt" / sbtV / s"$org-$artifact-$dottyBridgeVersion-bin_${dottyVersion}__$classVersion")
+      },
+      publishLocal := (publishLocal.dependsOn(cleanSbtBridge)).value,
       description := "sbt compiler bridge for Dotty",
       resolvers += Resolver.typesafeIvyRepo("releases"),
       libraryDependencies ++= Seq(