added cross compile for scalajs 1.0

build.sbt

@@ -55,7 +55,10 @@ lazy val commonSettings = scalaSettings ++ publishSettings ++ Seq(
 
 lazy val commonJsSettings = Seq(
   jsEnv := new org.scalajs.jsenv.jsdomnodejs.JSDOMNodeJSEnv(),
-  scalacOptions += "-P:scalajs:sjsDefinedByDefault"
+  scalacOptions ++= {
+    if (scalaJSVersion.startsWith("0.6.")) Seq("-P:scalajs:sjsDefinedByDefault")
+    else Nil
+  }
 )
 
 lazy val lagomVersion         = settingKey[String]("The Lagom version to use.")

project/plugins.sbt

@@ -1,10 +1,15 @@
+val scalaJSVersion = Option(System.getenv("SCALAJS_VERSION")).getOrElse("0.6.32")
+
 addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.0.0")
-addSbtPlugin("org.scala-js"       % "sbt-scalajs"              % "0.6.32")
+addSbtPlugin("org.scala-js"       % "sbt-scalajs"              % scalaJSVersion)
 
 addSbtPlugin("com.jsuereth"  % "sbt-pgp"      % "1.1.1")
 addSbtPlugin("org.akka-js"   % "sbt-shocon"   % "0.5.0")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.3.0")
 
 libraryDependencies ++= Seq(
   "org.eclipse.jgit" % "org.eclipse.jgit.pgm" % "3.7.1.201504261725-r"
-)
+) ++ {
+  if (scalaJSVersion.startsWith("0.6.")) Nil
+  else Seq("org.scala-js" %% "scalajs-env-jsdom-nodejs" % "1.0.0")
+}