sbt bridge reporter

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 +1,45 @@
+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 == 3)
+      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,
+      assert(problems.count(_.severity == Severity.Info) == 1)  // one error found
+    })
+  )
+}

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

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

project/Build.scala

@@ -207,11 +207,28 @@ object DottyBuild extends Build {
     ).
     settings(publishing)
 
+  // until sbt/sbt#2402 is fixed (https://github.com/sbt/sbt/issues/2402)
+  lazy val cleanBridge = TaskKey[Unit]("clean-sbt-bridge", "delete dotty-sbt-bridge cache")
+
   lazy val `dotty-bridge` = project.in(file("bridge")).
     dependsOn(dotty).
     settings(
       overrideScalaVersionSetting,
 
+      cleanBridge := {
+        val dottyBridgeVersion = version.value
+        val dottyVersion = (version in dotty).value
+        val classVersion = System.getProperty("java.class.version")
+        val sbtV = sbtVersion.value
+        val home = System.getProperty("user.home")
+        val org = organization.value
+        val artifact = moduleName.value
+
+        IO.delete(file(home) / ".ivy2" / "cache" / "org.scala-sbt" / s"$org-$artifact-$dottyBridgeVersion-bin_${dottyVersion}__$classVersion")
+        IO.delete(file(home) / ".sbt"  / "boot" / "scala-2.10.6" / "org.scala-sbt" / "sbt" / sbtV / s"$org-$artifact-$dottyBridgeVersion-bin_${dottyVersion}__$classVersion")
+      },
+      publishLocal <<= publishLocal.dependsOn(cleanBridge),
+
       description := "sbt compiler bridge for Dotty",
       resolvers += Resolver.typesafeIvyRepo("releases"),
       libraryDependencies ++= Seq(