Add Scala Native support

.travis.yml

@@ -1,13 +1,19 @@
-dist: trusty
+dist: xenial
 group: stable
 
 language: scala
-jdk: oraclejdk8
+jdk: openjdk11
 
 before_script:
  - export JVM_OPTS="-Dfile.encoding=UTF-8 -Xmx1G -Xms1G -server -XX:ReservedCodeCacheSize=128M"
  - unset _JAVA_OPTIONS
 
+addons:
+  apt:
+    packages:
+      - clang
+      - libunwind-dev
+
 script: sbt scripted
 
 cache:

README.markdown

@@ -74,7 +74,7 @@ This is an example where `core` builds against Scala 2.11 and 2.12, but app only
 
 ### Scala.js support
 
-Scala.js support was added in sbt-projectmatrix 0.2.0.
+[Scala.js](http://scala-js.org/) support was added in sbt-projectmatrix 0.2.0.
 To use this, you need to setup sbt-scalajs as well:
 
 ```scala
@@ -87,6 +87,22 @@ lazy val core = (projectMatrix in file("core"))
 
 This will create subprojects `coreJS2_11` and `coreJS2_12`.
 
+### Scala Native support
+
+[Scala Native](http://scala-native.org) support will be added in upcoming release.
+To use this, you need to setup sbt-scala-native` as well:
+
+```scala
+lazy val core = (projectMatrix in file("core"))
+  .settings(
+    name := "core"
+  )
+  .nativePlatform(scalaVersions = Seq("2.12.8", "2.11.12"))
+```
+
+This will create subprojects `coreJS2_11` and `coreJS2_12`.
+
+
 ### parallel cross-library building
 
 The rows can also be used for parallel cross-library building.

src/main/scala/sbt/ProjectMatrix.scala

@@ -69,6 +69,10 @@ sealed trait ProjectMatrix extends CompositeProject {
   def jsPlatform(scalaVersions: Seq[String], settings: Seq[Setting[_]]): ProjectMatrix
   def js: ProjectFinder
 
+  def nativePlatform(scalaVersions: Seq[String]): ProjectMatrix
+  def nativePlatform(scalaVersions: Seq[String], settings: Seq[Setting[_]]): ProjectMatrix
+  def native: ProjectFinder
+
   def crossLibrary(scalaVersions: Seq[String], suffix: String, settings: Seq[Setting[_]]): ProjectMatrix
   def crossLib(suffix: String): ProjectFinder
 
@@ -93,6 +97,8 @@ object ProjectMatrix {
   val jvmDirectorySuffix: String = "-jvm"
   val jsIdSuffix: String = "JS"
   val jsDirectorySuffix: String = "-js"
+  val nativeIdSuffix: String = "NATIVE"
+  val nativeDirectorySuffix: String = "-native"
 
   /** A row in the project matrix, typically representing a platform.
    */
@@ -209,7 +215,7 @@ object ProjectMatrix {
 
     override def jsPlatform(scalaVersions: Seq[String]): ProjectMatrix =
       jsPlatform(scalaVersions, Nil)
-    
+
     override def jsPlatform(scalaVersions: Seq[String], settings: Seq[Setting[_]]): ProjectMatrix =
       custom(jsIdSuffix, jsDirectorySuffix, scalaVersions,
         { _
@@ -228,6 +234,29 @@ object ProjectMatrix {
       }
     }
 
+    override def native: ProjectFinder = new SuffixBaseProjectFinder(nativeIdSuffix)
+
+    override def nativePlatform(scalaVersions: Seq[String]): ProjectMatrix =
+      nativePlatform(scalaVersions, Nil)
+
+    override def nativePlatform(scalaVersions: Seq[String], settings: Seq[Setting[_]]): ProjectMatrix =
+      custom(nativeIdSuffix, nativeDirectorySuffix, scalaVersions,
+        { _
+          .enablePlugins(nativePlugin(this.getClass.getClassLoader).getOrElse(
+            sys.error("""Scala Native plugin was not found. Add the sbt-scala-native plugin into project/plugins.sbt:
+                        |  addSbtPlugin("org.scala-native" % "sbt-scala-natiev" % "x.y.z")
+                        |""".stripMargin)
+          ))
+          .settings(settings)
+        })
+
+    def nativePlugin(classLoader: ClassLoader): Try[AutoPlugin] = {
+      import sbtprojectmatrix.ReflectionUtil._
+      withContextClassloader(classLoader) { loader =>
+        getSingletonObject[AutoPlugin](loader, "scala.scalanative.sbtplugin.ScalaNativePlugin$")
+      }
+    }
+
     override def js: ProjectFinder = new SuffixBaseProjectFinder(jsIdSuffix)
 
     override def crossLibrary(scalaVersions: Seq[String], suffix: String, settings: Seq[Setting[_]]): ProjectMatrix =

src/sbt-test/projectMatrix/native/build.sbt

@@ -0,0 +1,17 @@
+// lazy val root = (project in file("."))
+//   .aggregate(core.projectRefs ++ app.projectRefs: _*)
+//   .settings(
+//   )
+
+lazy val core = (projectMatrix in file("core"))
+  .settings(
+    name := "core"
+  )
+  .nativePlatform(scalaVersions = Seq("2.11.12", "2.11.11"))
+
+lazy val app = (projectMatrix in file("app"))
+  .dependsOn(core)
+  .settings(
+    name := "app"
+  )
+  .nativePlatform(scalaVersions = Seq("2.11.12"))

src/sbt-test/projectMatrix/native/core/src/main/scala/Core.scala

@@ -0,0 +1,6 @@
+package a
+
+class Core {
+}
+
+object Core extends Core

src/sbt-test/projectMatrix/native/project/plugins.sbt

@@ -0,0 +1,6 @@
+sys.props.get("plugin.version") match {
+  case Some(x) => addSbtPlugin("com.eed3si9n" % "sbt-projectmatrix" % x)
+  case _ => sys.error("""|The system property 'plugin.version' is not defined.
+                         |Specify this property using the scriptedLaunchOpts -D.""".stripMargin)
+}
+addSbtPlugin("org.scala-native" % "sbt-scala-native" % "0.3.9")

src/sbt-test/projectMatrix/native/test

@@ -0,0 +1,5 @@
+> nativeLink
+
+$ exists app/target/native-2.12/app-out
+$ exists core/target/native-2.12/core-out
+$ exists core/target/native-2.11/core-out