Merge pull request akka#17549 from akka/wip-crosscompile-2.12-∂π

add crosscompilation for 2.12.0-M1

akka-actor-tests/build.sbt

@@ -8,4 +8,4 @@ Unidoc.scaladocSettings
 
 publishArtifact in Compile := false
 
-libraryDependencies ++= Dependencies.actorTests
+Dependencies.actorTests

akka-actor/build.sbt

@@ -11,7 +11,7 @@ Unidoc.javadocSettings
 
 OSGi.actor
 
-libraryDependencies ++= Dependencies.actor
+Dependencies.actor
 
 MimaKeys.previousArtifact := akkaPreviousArtifact("akka-actor").value
 

akka-agent/build.sbt

@@ -11,6 +11,6 @@ Unidoc.javadocSettings
 
 OSGi.agent
 
-libraryDependencies ++= Dependencies.agent
+Dependencies.agent
 
 MimaKeys.previousArtifact := akkaPreviousArtifact("akka-agent").value

akka-camel/build.sbt

@@ -11,6 +11,6 @@ Unidoc.javadocSettings
 
 OSGi.camel
 
-libraryDependencies ++= Dependencies.camel
+Dependencies.camel
 
 MimaKeys.previousArtifact := akkaPreviousArtifact("akka-camel").value

akka-cluster-metrics/build.sbt

@@ -16,7 +16,7 @@ SigarLoader.sigarSettings
 
 OSGi.clusterMetrics
 
-libraryDependencies ++= Dependencies.clusterMetrics
+Dependencies.clusterMetrics
 
 //MimaKeys.previousArtifact := akkaPreviousArtifact("akka-cluster-metrics").value
 

akka-cluster-sharding/build.sbt

@@ -13,6 +13,6 @@ OSGi.clusterSharding
 
 MultiNode.multiJvmSettings
 
-libraryDependencies ++= Dependencies.clusterSharding
+Dependencies.clusterSharding
 
 //MimaKeys.previousArtifact := akkaPreviousArtifact("akka-cluster-sharding").value

akka-cluster-tools/build.sbt

@@ -13,6 +13,6 @@ OSGi.clusterTools
 
 MultiNode.multiJvmSettings
 
-libraryDependencies ++= Dependencies.clusterTools
+Dependencies.clusterTools
 
 //MimaKeys.previousArtifact := akkaPreviousArtifact("akka-cluster-tools").value

akka-cluster/build.sbt

@@ -14,7 +14,7 @@ MultiNode.multiJvmSettings
 
 OSGi.cluster
 
-libraryDependencies ++= Dependencies.cluster
+Dependencies.cluster
 
 MimaKeys.previousArtifact := akkaPreviousArtifact("akka-cluster").value
 

akka-contrib/build.sbt

@@ -11,7 +11,7 @@ Unidoc.javadocSettings
 
 MultiNode.multiJvmSettings
 
-libraryDependencies ++= Dependencies.contrib
+Dependencies.contrib
 
 MimaKeys.reportBinaryIssues := () // disable bin comp check
 

akka-docs/build.sbt

@@ -17,7 +17,7 @@ SphinxDoc.sphinxPreprocessing
 
 SphinxDoc.docsSettings
 
-libraryDependencies ++= Dependencies.docs
+Dependencies.docs
 
 publishArtifact in Compile := false
 

akka-kernel/build.sbt

@@ -9,6 +9,6 @@ Unidoc.scaladocSettingsNoVerificationOfDiagrams
 
 Unidoc.javadocSettings
 
-libraryDependencies ++= Dependencies.kernel
+Dependencies.kernel
 
 MimaKeys.previousArtifact := akkaPreviousArtifact("akka-kernel").value

akka-osgi/build.sbt

@@ -11,7 +11,7 @@ Unidoc.javadocSettings
 
 OSGi.osgi
 
-libraryDependencies ++= Dependencies.osgi
+Dependencies.osgi
 
 parallelExecution in Test := false
 

akka-persistence-tck/build.sbt

@@ -14,7 +14,7 @@ Unidoc.javadocSettings
 
 // OSGi.persistenceTck TODO: we do need to export this as OSGi bundle too?
 
-libraryDependencies ++= Dependencies.persistenceTck
+Dependencies.persistenceTck
 
 MimaKeys.previousArtifact := None
 

akka-remote/build.sbt

@@ -11,7 +11,7 @@ Unidoc.javadocSettings
 
 OSGi.remote
 
-libraryDependencies ++= Dependencies.remote
+Dependencies.remote
 
 parallelExecution in Test := false
 

akka-slf4j/build.sbt

@@ -11,6 +11,6 @@ Unidoc.javadocSettings
 
 OSGi.slf4j
 
-libraryDependencies ++= Dependencies.slf4j
+Dependencies.slf4j
 
 MimaKeys.previousArtifact := akkaPreviousArtifact("akka-slf4j").value

akka-testkit/build.sbt

@@ -12,7 +12,7 @@ Unidoc.javadocSettings
 OSGi.testkit
 
 // to fix scaladoc generation
-libraryDependencies ++= Dependencies.testkit
+Dependencies.testkit
 
 initialCommands += "import akka.testkit._"
 

akka-typed/src/main/scala/akka/typed/ActorRef.scala

@@ -16,7 +16,7 @@ import language.implicitConversions
  * [[akka.event.EventStream]] on a best effort basis
  * (i.e. this delivery is not reliable).
  */
-abstract class ActorRef[-T] extends java.lang.Comparable[ActorRef[_]] { this: ScalaActorRef[T] ⇒
+abstract class ActorRef[-T] extends java.lang.Comparable[ActorRef[Any]] { this: ScalaActorRef[T] ⇒
   /**
    * INTERNAL API.
    *
@@ -52,7 +52,7 @@ abstract class ActorRef[-T] extends java.lang.Comparable[ActorRef[_]] { this: Sc
     case _              ⇒ false
   }
   override def hashCode = untypedRef.hashCode
-  override def compareTo(other: ActorRef[_]) = untypedRef.compareTo(other.untypedRef)
+  override def compareTo(other: ActorRef[Any]) = untypedRef.compareTo(other.untypedRef)
 }
 
 /**

project/AkkaBuild.scala

@@ -31,11 +31,9 @@ object AkkaBuild extends Build {
 
   val parallelExecutionByDefault = false // TODO: enable this once we're sure it doesn not break things
 
-  lazy val buildSettings = Seq(
+  lazy val buildSettings = Dependencies.Versions ++ Seq(
     organization        := "com.typesafe.akka",
-    version             := "2.4-SNAPSHOT",
-    scalaVersion        := Dependencies.Versions.scalaVersion,
-    crossScalaVersions  := Dependencies.Versions.crossScala
+    version             := "2.4-SNAPSHOT"
   )
 
   lazy val root = Project(

project/Dependencies.scala

@@ -1,31 +1,31 @@
 package akka
 
 import sbt._
+import Keys._
 
 object Dependencies {
 
-  import DependencyHelpers._
-  import DependencyHelpers.ScalaVersionDependentModuleID._
+  lazy val scalaTestVersion = settingKey[String]("The version of ScalaTest to use.")
+  lazy val scalaStmVersion = settingKey[String]("The version of ScalaSTM to use.")
+  lazy val scalaCheckVersion = settingKey[String]("The version of ScalaCheck to use.")
 
-  object Versions {
-    val crossScala = Seq("2.11.6")
-    val scalaVersion = crossScala.head
-    val scalaStmVersion  = sys.props.get("akka.build.scalaStmVersion").getOrElse("0.7")
-    val scalaTestVersion = sys.props.get("akka.build.scalaTestVersion").getOrElse("2.2.4")
-    val scalaCheckVersion = sys.props.get("akka.build.scalaCheckVersion").getOrElse("1.11.6")
-  }
+  val Versions = Seq(
+    crossScalaVersions := Seq("2.11.6", "2.12.0-M1"),
+    scalaVersion := crossScalaVersions.value.head,
+    scalaStmVersion := sys.props.get("akka.build.scalaStmVersion").getOrElse("0.7"),
+    scalaCheckVersion := sys.props.get("akka.build.scalaCheckVersion").getOrElse("1.11.6"),
+    scalaTestVersion := (if (scalaVersion.value == "2.12.0-M1") "2.2.5-M1" else "2.2.4")
+  )
 
   object Compile {
-    import Versions._
-
     // Compile
     val camelCore     = "org.apache.camel"            % "camel-core"                   % "2.13.4" exclude("org.slf4j", "slf4j-api") // ApacheV2
 
     // when updating config version, update links ActorSystem ScalaDoc to link to the updated version
     val config        = "com.typesafe"                % "config"                       % "1.3.0"       // ApacheV2
     val netty         = "io.netty"                    % "netty"                        % "3.10.3.Final" // ApacheV2
     val protobuf      = "com.google.protobuf"         % "protobuf-java"                % "2.5.0"       // New BSD
-    val scalaStm      = "org.scala-stm"              %% "scala-stm"                    % scalaStmVersion // Modified BSD (Scala)
+    val scalaStm      = Def.setting { "org.scala-stm" %% "scala-stm" % scalaStmVersion.value } // Modified BSD (Scala)
 
     val slf4jApi      = "org.slf4j"                   % "slf4j-api"                    % "1.7.12"       // MIT
     // mirrored in OSGi sample
@@ -44,8 +44,8 @@ object Dependencies {
       val logback      = "ch.qos.logback"              % "logback-classic"              % "1.1.3"            % "test" // EPL 1.0 / LGPL 2.1
       val mockito      = "org.mockito"                 % "mockito-all"                  % "1.10.19"          % "test" // MIT
       // changing the scalatest dependency must be reflected in akka-docs/rst/dev/multi-jvm-testing.rst
-      val scalatest    = "org.scalatest"              %% "scalatest"                    % scalaTestVersion   % "test" // ApacheV2
-      val scalacheck   = "org.scalacheck"             %% "scalacheck"                   % scalaCheckVersion  % "test" // New BSD
+      val scalatest    = Def.setting { "org.scalatest"  %% "scalatest"  % scalaTestVersion.value   % "test" } // ApacheV2
+      val scalacheck   = Def.setting { "org.scalacheck" %% "scalacheck" % scalaCheckVersion.value  % "test" } // New BSD
       val pojosr       = "com.googlecode.pojosr"       % "de.kalpatec.pojosr.framework" % "0.2.1"            % "test" // ApacheV2
       val tinybundles  = "org.ops4j.pax.tinybundles"   % "tinybundles"                  % "1.0.0"            % "test" // ApacheV2
       val log4j        = "log4j"                       % "log4j"                        % "1.2.14"           % "test" // ApacheV2
@@ -75,66 +75,41 @@ object Dependencies {
   }
 
   import Compile._
+  val l = libraryDependencies
 
-  val actor = Seq(config)
+  val actor = l ++= Seq(config)
 
-  val testkit = Seq(Test.junit, Test.scalatest) ++ Test.metricsAll
+  val testkit = l ++= Seq(Test.junit, Test.scalatest.value) ++ Test.metricsAll
 
-  val actorTests = Seq(Test.junit, Test.scalatest, Test.commonsCodec, Test.commonsMath, Test.mockito, Test.scalacheck, protobuf, Test.junitIntf)
+  val actorTests = l ++= Seq(Test.junit, Test.scalatest.value, Test.commonsCodec, Test.commonsMath, Test.mockito, Test.scalacheck.value, protobuf, Test.junitIntf)
 
-  val remote = Seq(netty, protobuf, uncommonsMath, Test.junit, Test.scalatest)
+  val remote = l ++= Seq(netty, protobuf, uncommonsMath, Test.junit, Test.scalatest.value)
 
-  val remoteTests = deps(Test.junit, Test.scalatest, Test.scalaXml)
+  val remoteTests = l ++= Seq(Test.junit, Test.scalatest.value, Test.scalaXml)
 
-  val cluster = Seq(Test.junit, Test.scalatest)
+  val cluster = l ++= Seq(Test.junit, Test.scalatest.value)
 
-  val clusterTools = Seq(Test.junit, Test.scalatest)
+  val clusterTools = l ++= Seq(Test.junit, Test.scalatest.value)
 
-  val clusterSharding = Seq(Test.junit, Test.scalatest, Test.commonsIo)
-
-  val clusterMetrics = Seq(Provided.sigarLoader, Test.slf4jJul, Test.slf4jLog4j, Test.logback, Test.mockito)
-
-  val slf4j = Seq(slf4jApi, Test.logback)
-
-  val agent = Seq(scalaStm, Test.scalatest, Test.junit)
-
-  val persistence = deps(protobuf, Provided.levelDB, Provided.levelDBNative, Test.scalatest, Test.junit, Test.commonsIo, Test.scalaXml)
+  val clusterSharding = l ++= Seq(Test.junit, Test.scalatest.value, Test.commonsIo)
 
-  val persistenceTck = Seq(Test.scalatest.copy(configurations = Some("compile")), Test.junit.copy(configurations = Some("compile")))
+  val clusterMetrics = l ++= Seq(Provided.sigarLoader, Test.slf4jJul, Test.slf4jLog4j, Test.logback, Test.mockito)
 
-  val kernel = Seq(Test.scalatest, Test.junit)
+  val slf4j = l ++= Seq(slf4jApi, Test.logback)
 
-  val camel = Seq(camelCore, Test.scalatest, Test.junit, Test.mockito, Test.logback, Test.commonsIo, Test.junitIntf)
+  val agent = l ++= Seq(scalaStm.value, Test.scalatest.value, Test.junit)
 
-  val osgi = Seq(osgiCore, osgiCompendium, Test.logback, Test.commonsIo, Test.pojosr, Test.tinybundles, Test.scalatest, Test.junit)
+  val persistence = l ++= Seq(protobuf, Provided.levelDB, Provided.levelDBNative, Test.scalatest.value, Test.junit, Test.commonsIo, Test.scalaXml)
 
-  val docs = Seq(Test.scalatest, Test.junit, Test.junitIntf)
+  val persistenceTck = l ++= Seq(Test.scalatest.value.copy(configurations = Some("compile")), Test.junit.copy(configurations = Some("compile")))
 
-  val contrib = Seq(Test.junitIntf, Test.commonsIo)
-}
-
-object DependencyHelpers {
-
-  import sbt.Keys._
+  val kernel = l ++= Seq(Test.scalatest.value, Test.junit)
 
-  case class ScalaVersionDependentModuleID(val modules: String => Seq[ModuleID]) {
-    def %(config: String): ScalaVersionDependentModuleID =
-      ScalaVersionDependentModuleID(version => modules(version).map(_ % config))
-  }
-
-  object ScalaVersionDependentModuleID {
-    implicit def liftConstantModule(mod: ModuleID): ScalaVersionDependentModuleID =
-      ScalaVersionDependentModuleID(_ => Seq(mod))
+  val camel = l ++= Seq(camelCore, Test.scalatest.value, Test.junit, Test.mockito, Test.logback, Test.commonsIo, Test.junitIntf)
 
-    def fromPF(f: PartialFunction[String, ModuleID]): ScalaVersionDependentModuleID =
-      ScalaVersionDependentModuleID(version => if (f.isDefinedAt(version)) Seq(f(version)) else Nil)
+  val osgi = l ++= Seq(osgiCore, osgiCompendium, Test.logback, Test.commonsIo, Test.pojosr, Test.tinybundles, Test.scalatest.value, Test.junit)
 
-  }
+  val docs = l ++= Seq(Test.scalatest.value, Test.junit, Test.junitIntf)
 
-  /**
-   * Use this as a dependency setting if the dependencies contain both static and Scala-version
-   * dependent entries.
-   */
-  def deps(modules: ScalaVersionDependentModuleID*) =
-    libraryDependencies <++= scalaVersion(version => modules.flatMap(m => m.modules(version)))
+  val contrib = l ++= Seq(Test.junitIntf, Test.commonsIo)
 }

project/MultiNode.scala

@@ -37,10 +37,15 @@ object MultiNode {
       (if (onlyTestTags.value.isEmpty) Seq.empty else Seq("-n", if (multiNodeEnabled) onlyTestTags.value.mkString("\"", " ", "\"") else onlyTestTags.value.mkString(" ")))
   }
 
-  lazy val multiJvmSettings = SbtMultiJvm.multiJvmSettings ++ inConfig(MultiJvm)(SbtScalariform.configScalariformSettings) ++ Seq(
-    jvmOptions in MultiJvm := defaultMultiJvmOptions,
-    compileInputs in(MultiJvm, compile) <<= (compileInputs in(MultiJvm, compile)) dependsOn (ScalariformKeys.format in MultiJvm),
-    compile in MultiJvm <<= (compile in MultiJvm) triggeredBy (compile in Test)) ++
+  lazy val multiJvmSettings =
+    SbtMultiJvm.multiJvmSettings ++
+    inConfig(MultiJvm)(SbtScalariform.configScalariformSettings) ++
+    Seq(
+      jvmOptions in MultiJvm := defaultMultiJvmOptions,
+      compileInputs in(MultiJvm, compile) <<= (compileInputs in(MultiJvm, compile)) dependsOn (ScalariformKeys.format in MultiJvm),
+      scalacOptions in MultiJvm <<= scalacOptions in Test,
+      compile in MultiJvm <<= (compile in MultiJvm) triggeredBy (compile in Test)
+    ) ++
     Option(System.getProperty("akka.test.multi-node.hostsFileName")).map(x => Seq(multiNodeHostsFileName in MultiJvm := x)).getOrElse(Seq.empty) ++
     Option(System.getProperty("akka.test.multi-node.java")).map(x => Seq(multiNodeJavaName in MultiJvm := x)).getOrElse(Seq.empty) ++
     Option(System.getProperty("akka.test.multi-node.targetDirName")).map(x => Seq(multiNodeTargetDirName in MultiJvm := x)).getOrElse(Seq.empty) ++