Add Scala.JS 1.0 support (#159)

.travis.yml

@@ -12,8 +12,17 @@ jobs:
   - scala: 2.11.12
   - scala: 2.12.10
   - scala: 2.13.1
+  - env: SCALAJS_VERSION=0.6.32
+    name: "Scala.JS 0.6"
+    script: sbt -batch +testJS/test
   - stage: release
     script: sbt ci-release
+  - stage: release
+    env:
+    - SCALAJS_VERSION=0.6.32
+    - CI_RELEASE=+coreJS/publishSigned
+    name: "Scala.JS 0.6"
+    script: sbt ci-release
 branches:
   only:
   - master

project/Settings.scala

@@ -12,6 +12,13 @@ object Settings {
   lazy val shared = Seq(
     scalaVersion := scala212,
     crossScalaVersions := Seq(scala213, scala212, scala211),
+    crossScalaVersions := {
+      val former = crossScalaVersions.value
+      if (isScalaJs1.value)
+        former.filter(!_.startsWith("2.11."))
+      else
+        former
+    },
     scalacOptions ++= {
       scalaBinaryVersion.value match {
         case "2.11" =>
@@ -33,4 +40,10 @@ object Settings {
     testFrameworks += new TestFramework("utest.runner.Framework")
   )
 
+  lazy val isScalaJs1 = Def.setting {
+    def scalaJsVersion = Option(System.getenv("SCALAJS_VERSION")).getOrElse("1.0.0")
+    sbtcrossproject.CrossPlugin.autoImport.crossProjectPlatform.?.value.contains(scalajscrossproject.JSPlatform) &&
+      scalaJsVersion.startsWith("1.")
+  }
+
 }

project/plugins.sbt

@@ -1,8 +1,11 @@
 plugins_(
   "com.geirsson"       % "sbt-ci-release"           % "1.5.2",
   "com.typesafe"       % "sbt-mima-plugin"          % "0.7.0",
-  "org.scala-js"       % "sbt-scalajs"              % "0.6.32",
   "org.portable-scala" % "sbt-scalajs-crossproject" % "1.0.0"
 )
 
 def plugins_(modules: ModuleID*) = modules.map(addSbtPlugin)
+
+val scalaJsVersion = Option(System.getenv("SCALAJS_VERSION")).getOrElse("1.0.0")
+
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % scalaJsVersion)