Merge pull request #45 from ThoughtWorksInc/cross-build-scalajs

Cross build for Scala.js 1.x and 0.6

.travis.yml

@@ -31,8 +31,14 @@ before_deploy:
 
 deploy:
   - provider: script
-    script: sbt ++$TRAVIS_SCALA_VERSION "set every Seq(sonatypeSessionName := \"Travis Job $TRAVIS_JOB_NAME $TRAVIS_JOB_NUMBER ($TRAVIS_JOB_WEB_URL)\", publishTo := sonatypePublishToBundle.value)" publishSigned sonatypeBundleRelease
+    script: sbt $SBT_ARGS ++$TRAVIS_SCALA_VERSION "set every Seq(sonatypeSessionName := \"Travis Job $TRAVIS_JOB_NAME $TRAVIS_JOB_NUMBER ($TRAVIS_JOB_WEB_URL)\", publishTo := sonatypePublishToBundle.value)" publishSigned sonatypeBundleRelease
     skip_cleanup: true
     on:
       all_branches: true
       condition: $GITHUB_PERSONAL_ACCESS_TOKEN
+
+env:
+  - SBT_ARGS=
+  - SBT_ARGS=--addPluginSbtFile=project/plugins.sbt.scala-js.0.6
+
+sbt_args: $SBT_ARGS

build.sbt

@@ -1,3 +1,5 @@
+import sbtcrossproject.CrossPlugin.autoImport.{crossProject, CrossType} 
+
 organization in ThisBuild := "com.thoughtworks.sde"
 
 publish / skip := true

project/plugins.sbt

@@ -2,7 +2,9 @@ addSbtPlugin("com.thoughtworks.sbt-best-practice" % "sbt-best-practice" % "7.2.0
 
 addSbtPlugin("com.thoughtworks.sbt-scala-js-map" % "sbt-scala-js-map" % "4.0.0")
 
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.32")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.0.1")
+
+addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.0.0")
 
 addSbtPlugin("org.xerial.sbt" % "sbt-sonatype" % "3.8")
 

project/plugins.sbt.scala-js.0.6

@@ -0,0 +1,22 @@
+// An optional sbt file to replace Scala.js 1.0 with 0.6
+dependencyOverrides += Defaults.sbtPluginExtra(
+  "org.scala-js" % "sbt-scalajs" % "0.6.32",
+  sbtBinaryVersion.value,
+  scalaBinaryVersion.value,
+)
+
+Compile / sourceGenerators += Def.task {
+  val file = (Compile / sourceManaged).value / "SkipPublishForNonScalaJSProjects.scala"
+  IO.write(file, """
+    import scalajscrossproject.ScalaJSCrossPlugin.autoImport._
+    import sbtcrossproject.CrossPlugin.autoImport._
+    import sbt._, Keys._
+    object SkipPublishForNonScalaJSProjects extends AutoPlugin {
+      override def trigger = allRequirements
+      override def projectSettings = Seq(
+        publish / skip := crossProjectPlatform.value != JSPlatform
+      )
+    }
+  """)
+  Seq(file)
+}.taskValue