WIP: Scala native (#206)

* add scala-native PR#1143 as submodule

* first pass at integrating scala-native build into mill

including worker/bridge

* add the native libraries to the compile and run classpath

* sssshhh don't be so noisy

* update scala-native to latest build WIP

* update mill to latest scala-native build-api code

* add test interface from scala-native

this code is not published ornot published at the correct scala version so copy it in for now

* implement tests for scala-native

very messy at the moment
also correct bridge version as much as possible with out a scala-native release

* update to scala-native/master

scala-native #1143 now merged

* Remove scala-native submodule

* updates for scala-native 0.3.7 release

* fixes after rebase

* make test framework agnostic and tidy dependencies

* add robust method of getting JVM classpath for running tests

support for multiple test frameworks
tidy up

* rebase fixes for 0.2.0

* add SbtNativeModule and tidy

* rebase fixes

* fix building of compile / run Classpath (via transitiveIvyDeps)

better method of loading JVM test frameworks

* add tests for build, run, utest, scalatest

* move native tests into it own trait which can be extended/overidden

* change release mode to a sealed trait instead of boolean

* add logLevel to ScalaNativeModule and plumb in

propagate release and log levels to test projects

* use test-runner from scala-native instead of including project source

add ability easily compile against scala-native snapshots

* add some docs

* update to 0.3.8

1 files changed, 42 insertions, 5 deletions

diff --git a/build.sc b/build.sc
index 5d9550dc..cc5115fa 100755
--- a/build.sc
+++ b/build.sc
@@ -156,7 +156,8 @@ object scalalib extends MillModule {
       genTask(core)() ++
       genTask(main)() ++
       genTask(scalalib)() ++
-      genTask(scalajslib)()
+      genTask(scalajslib)() ++
+      genTask(scalanativelib)()
 
     worker.testArgs() ++
     main.graphviz.testArgs() ++
@@ -218,6 +219,39 @@ object twirllib extends MillModule {
 
 }
 
+object scalanativelib extends MillModule {
+  def moduleDeps = Seq(scalalib)
+
+  def scalacOptions = Seq[String]() // disable -P:acyclic:force
+
+  def testArgs = T{
+    val mapping = Map(
+      "MILL_SCALANATIVE_BRIDGE_0_3" ->
+        scalanativebridges("0.3").runClasspath()
+          .map(_.path)
+          .filter(_.toIO.exists)
+          .mkString(",")
+    )
+    scalalib.worker.testArgs() ++ (for((k, v) <- mapping.toSeq) yield s"-D$k=$v")
+  }
+
+  object scalanativebridges extends Cross[ScalaNativeBridgeModule]("0.3")
+  class ScalaNativeBridgeModule(scalaNativeBinary: String) extends MillModule {
+    def scalaNativeVersion = T{ "0.3.8" }
+    def moduleDeps = Seq(scalanativelib)
+    def ivyDeps = scalaNativeBinary match {
+      case "0.3" =>
+        Agg(
+          ivy"org.scala-native::tools:${scalaNativeVersion()}",
+          ivy"org.scala-native::util:${scalaNativeVersion()}",
+          ivy"org.scala-native::nir:${scalaNativeVersion()}",
+          ivy"org.scala-native::nir:${scalaNativeVersion()}",
+          ivy"org.scala-native::test-runner:${scalaNativeVersion()}",
+        )
+    }
+  }
+}
+
 def testRepos = T{
   Seq(
     "MILL_ACYCLIC_REPO" ->
@@ -238,10 +272,11 @@ def testRepos = T{
 }
 
 object integration extends MillModule{
-  def moduleDeps = Seq(moduledefs, scalalib, scalajslib)
+  def moduleDeps = Seq(moduledefs, scalalib, scalajslib, scalanativelib)
   def testArgs = T{
     scalajslib.testArgs() ++
     scalalib.worker.testArgs() ++
+    scalanativelib.testArgs() ++
     Seq(
       "-DMILL_TESTNG=" + testng.runClasspath().map(_.path).mkString(","),
       "-DMILL_VERSION=" + build.publishVersion()._2,
@@ -290,12 +325,13 @@ def launcherScript(shellJvmArgs: Seq[String],
 }
 
 object dev extends MillModule{
-  def moduleDeps = Seq(scalalib, scalajslib)
+  def moduleDeps = Seq(scalalib, scalajslib, scalanativelib)
   def forkArgs =
     (
       scalalib.testArgs() ++
       scalajslib.testArgs() ++
       scalalib.worker.testArgs() ++
+      scalanativelib.testArgs() ++
       // Workaround for Zinc/JNA bug
       // https://github.com/sbt/sbt/blame/6718803ee6023ab041b045a6988fafcfae9d15b5/main/src/main/scala/sbt/Main.scala#L130
       Seq(
@@ -305,6 +341,7 @@ object dev extends MillModule{
       )
     ).distinct
 
+
   // Pass dev.assembly VM options via file in Window due to small max args limit
   def windowsVmOptions(taskName: String, batch: Path, args: Seq[String])(implicit ctx: mill.util.Ctx) = {
     if (System.getProperty("java.specification.version").startsWith("1.")) {
@@ -412,7 +449,7 @@ def gitHead = T.input{
 def publishVersion = T.input{
   val tag =
     try Option(
-      %%('git, 'describe, "--exact-match", "--tags", gitHead())(pwd).out.string.trim()
+      %%('git, 'describe, "--exact-match", "--tags", "--always", gitHead())(pwd).out.string.trim()
     )
     catch{case e => None}
 
@@ -424,7 +461,7 @@ def publishVersion = T.input{
   tag match{
     case Some(t) => (t, t)
     case None =>
-      val latestTaggedVersion = %%('git, 'describe, "--abbrev=0", "--tags")(pwd).out.trim
+      val latestTaggedVersion = %%('git, 'describe, "--abbrev=0", "--always", "--tags")(pwd).out.trim
 
       val commitsSinceLastTag =
         %%('git, "rev-list", gitHead(), "--not", latestTaggedVersion, "--count")(pwd).out.trim.toInt