Add support for Scala Native

.travis.yml

@@ -15,12 +15,14 @@ env:
     # SONA_PASS
     - secure: "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"
   matrix:
-    - SCALAJS_VERSION=         ADOPTOPENJDK=8
-    - SCALAJS_VERSION=0.6.28   ADOPTOPENJDK=8
-    - SCALAJS_VERSION=1.0.0-M8 ADOPTOPENJDK=8
-    - SCALAJS_VERSION=         ADOPTOPENJDK=11
-    - SCALAJS_VERSION=0.6.28   ADOPTOPENJDK=11
-    - SCALAJS_VERSION=1.0.0-M8 ADOPTOPENJDK=11
+    - SCALAJS_VERSION=          ADOPTOPENJDK=8
+    - SCALAJS_VERSION=0.6.28    ADOPTOPENJDK=8
+    - SCALAJS_VERSION=1.0.0-M8  ADOPTOPENJDK=8
+    - SCALANATIVE_VERSION=0.3.9 ADOPTOPENJDK=8
+    - SCALAJS_VERSION=          ADOPTOPENJDK=11
+    - SCALAJS_VERSION=0.6.28    ADOPTOPENJDK=11
+    - SCALAJS_VERSION=1.0.0-M8  ADOPTOPENJDK=11
+    - SCALANATIVE_VERSION=0.3.9 ADOPTOPENJDK=11
 
 matrix:
 

build.sbt

@@ -24,6 +24,7 @@ lazy val root = project
   .aggregate(
     compat211JVM,
     compat211JS,
+    compat211Native,
     compat212JVM,
     compat212JS,
     compat213JVM,
@@ -60,17 +61,17 @@ scalaVersionsByJvm in ThisBuild := {
 }
 
 /** Create an OSGi version range for standard Scala versioning
-  * schemes that describes binary compatible versions. */
+ * schemes that describes binary compatible versions. */
 def osgiVersionRange(version: String, requireMicro: Boolean = false): String =
-  if(version contains '-') "${@}" // M, RC or SNAPSHOT -> exact version
-  else if(requireMicro) "${range;[===,=+)}" // At least the same micro version
+  if (version contains '-') "${@}" // M, RC or SNAPSHOT -> exact version
+  else if (requireMicro) "${range;[===,=+)}" // At least the same micro version
   else "${range;[==,=+)}" // Any binary compatible version
 
 /** Create an OSGi Import-Package version specification. */
 def osgiImport(pattern: String, version: String, requireMicro: Boolean = false): String =
   pattern + ";version=\"" + osgiVersionRange(version, requireMicro) + "\""
 
-lazy val compat = MultiScalaCrossProject(JSPlatform, JVMPlatform)(
+lazy val compat = MultiScalaCrossProject(JSPlatform, JVMPlatform, NativePlatform)(
   "compat",
   _.settings(scalaModuleSettings)
     .settings(commonSettings)
@@ -90,7 +91,8 @@ lazy val compat = MultiScalaCrossProject(JSPlatform, JVMPlatform)(
         if (scalaVersion.value.startsWith("2.13."))
           Seq(s"scala.collection.compat.*;version=${version.value}")
         else
-          Seq(s"scala.collection.compat.*;version=${version.value},scala.jdk.*;version=${version.value}")
+          Seq(
+            s"scala.collection.compat.*;version=${version.value},scala.jdk.*;version=${version.value}")
       },
       OsgiKeys.importPackage := Seq(osgiImport("*", scalaBinaryVersion.value)),
       OsgiKeys.privatePackage := Nil,
@@ -109,18 +111,25 @@ lazy val compat = MultiScalaCrossProject(JSPlatform, JVMPlatform)(
     )
     .jsConfigure(_.enablePlugins(ScalaJSJUnitPlugin))
     .disablePlugins(ScalafixPlugin)
+    .nativeSettings(
+      crossScalaVersions := List(scala211),
+      scalaVersion := scala211, // allows to compile if scalaVersion set not 2.11
+      nativeLinkStubs := true,
+      Test / test := false
+    )
 )
 
 val compat211 = compat(scala211)
 val compat212 = compat(scala212)
 val compat213 = compat(scala213)
 
-lazy val compat211JVM = compat211.jvm
-lazy val compat211JS  = compat211.js
-lazy val compat212JVM = compat212.jvm
-lazy val compat212JS  = compat212.js
-lazy val compat213JVM = compat213.jvm
-lazy val compat213JS  = compat213.js
+lazy val compat211JVM    = compat211.jvm
+lazy val compat211JS     = compat211.js
+lazy val compat211Native = compat211.native
+lazy val compat212JVM    = compat212.jvm
+lazy val compat212JS     = compat212.js
+lazy val compat213JVM    = compat213.jvm
+lazy val compat213JS     = compat213.js
 
 lazy val `binary-compat-old` = project
   .in(file("binary-compat/old"))
@@ -285,6 +294,7 @@ val preRelease         = "preRelease"
 val travisScalaVersion = sys.env.get("TRAVIS_SCALA_VERSION").flatMap(Version.parse)
 val releaseVersion     = sys.env.get("TRAVIS_TAG").flatMap(Version.parse)
 val isScalaJs          = sys.env.get("SCALAJS_VERSION").map(_.nonEmpty).getOrElse(false)
+val isScalaNative      = sys.env.get("SCALANATIVE_VERSION").map(_.nonEmpty).getOrElse(false)
 val isScalafix         = sys.env.get("TEST_SCALAFIX").nonEmpty
 val isScalafmt         = sys.env.get("TEST_SCALAFMT").nonEmpty
 val isBinaryCompat     = sys.env.get("TEST_BINARY_COMPAT").nonEmpty
@@ -342,13 +352,14 @@ inThisBuild(
             "TRAVIS_SCALA_VERSION",
             "TRAVIS_TAG",
             "SCALAJS_VERSION",
+            "SCALANATIVE_VERSION",
             "TEST_SCALAFIX",
             "TEST_SCALAFMT",
             "TEST_BINARY_COMPAT"
           ).foreach(k =>
             println(k.padTo(20, " ").mkString("") + " -> " + sys.env.get(k).getOrElse("None")))
 
-          val platformSuffix = if (isScalaJs) "JS" else ""
+          val platformSuffix = if (isScalaJs) "JS" else if (isScalaNative) "Native" else ""
 
           val compatProject       = "compat" + travisScalaVersion.get.binary + platformSuffix
           val binaryCompatProject = "binary-compat"
@@ -387,7 +398,7 @@ inThisBuild(
           Seq(
             setPublishVersion,
             List(s"$projectPrefix/clean"),
-            List(s"$testProjectPrefix/test"),
+            if (isScalaNative) List() else List(s"$testProjectPrefix/test"),
             List(s"$projectPrefix/publishLocal"),
             publishTask
           ).flatten

compat/src/main/scala-2.11_2.12/scala/collection/compat/BuildFrom.scala

@@ -26,7 +26,7 @@ trait BuildFrom[-From, -A, +C] extends Any {
   def fromSpecific(from: From)(it: IterableOnce[A]): C
 
   /** Get a Builder for the collection. For non-strict collection types this will use an intermediate buffer.
-    * Building collections with `fromSpecific` is preferred because it can be lazy for lazy collections. */
+   * Building collections with `fromSpecific` is preferred because it can be lazy for lazy collections. */
   def newBuilder(from: From): mutable.Builder[A, C]
 
   @deprecated("Use newBuilder() instead of apply()", "2.13.0")
@@ -40,7 +40,7 @@ object BuildFrom {
       implicit cbf: CanBuildFrom[From, A, C]): BuildFrom[From, A, C] =
     new BuildFrom[From, A, C] {
       def fromSpecific(from: From)(it: IterableOnce[A]): C = (cbf(from) ++= it).result()
-      def newBuilder(from: From): mutable.Builder[A, C]        = cbf(from)
+      def newBuilder(from: From): mutable.Builder[A, C]    = cbf(from)
     }
 
   // Implicit conversion derived from an implicit conversion to CanBuildFrom

compat/src/main/scala-2.11_2.12/scala/collection/compat/PackageShared.scala

@@ -156,7 +156,8 @@ private[compat] trait PackageShared {
   type IterableOnce[+X] = c.TraversableOnce[X]
   val IterableOnce = c.TraversableOnce
 
-  implicit def toMapViewExtensionMethods[K, V, C <: scala.collection.Map[K, V]](self: IterableView[(K, V), C]): MapViewExtensionMethods[K, V, C] =
+  implicit def toMapViewExtensionMethods[K, V, C <: scala.collection.Map[K, V]](
+      self: IterableView[(K, V), C]): MapViewExtensionMethods[K, V, C] =
     new MapViewExtensionMethods[K, V, C](self)
 }
 
@@ -235,7 +236,10 @@ class TraversableExtensionMethods[A](private val self: c.Traversable[A]) extends
   def iterableFactory: GenericCompanion[Traversable] = self.companion
 }
 
-class MapViewExtensionMethods[K, V, C <: scala.collection.Map[K, V]](private val self: IterableView[(K, V), C]) extends AnyVal {
-  def mapValues[W, That](f: V => W)(implicit bf: CanBuildFrom[IterableView[(K, V), C], (K, W), That]): That =
+class MapViewExtensionMethods[K, V, C <: scala.collection.Map[K, V]](
+    private val self: IterableView[(K, V), C])
+    extends AnyVal {
+  def mapValues[W, That](f: V => W)(
+      implicit bf: CanBuildFrom[IterableView[(K, V), C], (K, W), That]): That =
     self.map[(K, W), That] { case (k, v) => (k, f(v)) }
 }

compat/src/main/scala-2.11_2.12/scala/collection/compat/immutable/ArraySeq.scala

@@ -256,7 +256,7 @@ object ArraySeq {
       return false
 
     val len = xs.length
-    var i = 0
+    var i   = 0
     while (i < len) {
       if (xs(i) != ys(i))
         return false

compat/src/test/scala/scala/jdk/CollectionConvertersTest.scala

@@ -15,73 +15,73 @@ class CollectionConvertersTest {
     val it = "a b c".split(" ").iterator
 
     {
-      val j = it.asJava
+      val j  = it.asJava
       val je = it.asJavaEnumeration
-      val s = (j: ju.Iterator[String]).asScala
+      val s  = (j: ju.Iterator[String]).asScala
       assert((s: Iterator[String]) eq it)
       val es = (je: ju.Enumeration[String]).asScala
       assert((es: Iterator[String]) eq it)
     }
 
     {
       val i: c.Iterable[String] = it.to(Iterable)
-      val j = i.asJava
-      val jc = i.asJavaCollection
-      val s = (j: jl.Iterable[String]).asScala
+      val j                     = i.asJava
+      val jc                    = i.asJavaCollection
+      val s                     = (j: jl.Iterable[String]).asScala
       assert((s: c.Iterable[String]) eq i)
       val cs = (jc: ju.Collection[String]).asScala
       assert((cs: c.Iterable[String]) eq i)
     }
 
     {
       val b: m.Buffer[String] = it.to(m.Buffer)
-      val j = b.asJava
-      val s = (j: ju.List[String]).asScala
+      val j                   = b.asJava
+      val s                   = (j: ju.List[String]).asScala
       assert((s: m.Buffer[String]) eq b)
     }
 
     {
       val q: m.Seq[String] = it.to(m.Seq)
-      val j = q.asJava
-      val s = (j: ju.List[String]).asScala
+      val j                = q.asJava
+      val s                = (j: ju.List[String]).asScala
       assert((s: m.Buffer[String]) == q) // not eq
     }
 
     {
       val q: c.Seq[String] = it.to(c.Seq)
-      val j = q.asJava
-      val s = (j: ju.List[String]).asScala
+      val j                = q.asJava
+      val s                = (j: ju.List[String]).asScala
       assert((s: m.Buffer[String]) == q) // not eq
     }
 
     {
       val t: m.Set[String] = it.to(m.Set)
-      val j = t.asJava
-      val s = (j: ju.Set[String]).asScala
+      val j                = t.asJava
+      val s                = (j: ju.Set[String]).asScala
       assert((s: m.Set[String]) eq t)
     }
 
     {
       val t: c.Set[String] = it.to(c.Set)
-      val j = t.asJava
-      val s = (j: ju.Set[String]).asScala
+      val j                = t.asJava
+      val s                = (j: ju.Set[String]).asScala
       assert((s: m.Set[String]) == t) // not eq
     }
 
     {
       val p: m.Map[String, String] = m.Map(it.map(a => (a, a)).toSeq: _*)
-      val j = p.asJava
-      val jd = p.asJavaDictionary
-      val s = (j: ju.Map[String, String]).asScala
+      val j                        = p.asJava
+      val jd                       = p.asJavaDictionary
+      val s                        = (j: ju.Map[String, String]).asScala
       assert((s: m.Map[String, String]) eq p)
       val ds = (jd: ju.Dictionary[String, String]).asScala
       assert((ds: m.Map[String, String]) eq p)
     }
 
     {
       val p: c.Map[String, String] = c.Map(it.map(a => (a, a)).toSeq: _*)
-      val j = p.asJava
-      val s = (j: ju.Map[String, String]).asScala
+      val j                        = p.asJava
+      val s                        = (j: ju.Map[String, String]).asScala
       assert((s: m.Map[String, String]) == p) // not eq
     }
 

compat/src/test/scala/test/scala/collection/BuildFromTest.scala

@@ -162,6 +162,6 @@ class BuildFromTest {
   // Implement BuildFrom
   class MyBuildFrom[From, A, C] extends BuildFrom[From, A, C] {
     def fromSpecific(from: From)(it: IterableOnce[A]): C = ???
-    def newBuilder(from: From): Builder[A, C] = ???
+    def newBuilder(from: From): Builder[A, C]            = ???
   }
 }

compat/src/test/scala/test/scala/collection/ViewTest.scala

@@ -21,9 +21,9 @@ class ViewTest {
 
   @Test
   def mapValues: Unit = {
-    val m = Map("a" -> 1, "b" -> 2, "c" -> 3)
-    val oldStyle = m.mapValues(x => x*x)
-    val newStyle = m.view.mapValues(x => x*x)
+    val m        = Map("a" -> 1, "b" -> 2, "c" -> 3)
+    val oldStyle = m.mapValues(x => x * x)
+    val newStyle = m.view.mapValues(x => x * x)
     assertEquals(oldStyle.toMap, newStyle.toMap)
   }
 

project/plugins.sbt

@@ -1,9 +1,16 @@
-val scalaJSVersion = Option(System.getenv("SCALAJS_VERSION")).filter(_.nonEmpty).getOrElse("0.6.28")
+val crossVer = "0.6.1"
+val scalaJSVersion =
+  Option(System.getenv("SCALAJS_VERSION")).filter(_.nonEmpty).getOrElse("0.6.28")
+val scalaNativeVersion =
+  Option(System.getenv("SCALANATIVE_VERSION")).filter(_.nonEmpty).getOrElse("0.3.9")
 
-addSbtPlugin("org.scala-js"           % "sbt-scalajs"              % scalaJSVersion)
-addSbtPlugin("org.portable-scala"     % "sbt-scalajs-crossproject" % "0.6.1")
-addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module"         % "2.0.0")
-addSbtPlugin("ch.epfl.scala"          % "sbt-scalafix"             % "0.9.5")
-addSbtPlugin("com.eed3si9n"           % "sbt-buildinfo"            % "0.9.0")
-addSbtPlugin("com.jsuereth"           % "sbt-pgp"                  % "1.1.2-1")
-addSbtPlugin("de.heikoseeberger"      % "sbt-header"               % "5.2.0")
+addSbtPlugin("org.scala-js"           % "sbt-scalajs"                   % scalaJSVersion)
+addSbtPlugin("org.portable-scala"     % "sbt-scalajs-crossproject"      % crossVer)
+addSbtPlugin("org.scala-native"       % "sbt-scala-native"              % scalaNativeVersion)
+addSbtPlugin("org.portable-scala"     % "sbt-scala-native-crossproject" % crossVer)
+addSbtPlugin("org.scala-native"       % "sbt-scala-native"              % scalaNativeVersion)
+addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module"              % "2.0.0")
+addSbtPlugin("ch.epfl.scala"          % "sbt-scalafix"                  % "0.9.5")
+addSbtPlugin("com.eed3si9n"           % "sbt-buildinfo"                 % "0.9.0")
+addSbtPlugin("com.jsuereth"           % "sbt-pgp"                       % "1.1.2-1")
+addSbtPlugin("de.heikoseeberger"      % "sbt-header"                    % "5.2.0")