From 7238d7340744a5eda74acb6970c2cbf7bedea0e7 Mon Sep 17 00:00:00 2001
From: Li Haoyi <haoyi.sg@gmail.com>
Date: Mon, 4 Dec 2017 07:52:31 -0800
Subject: Cross building acyclic now works, using a locally compiled
 cross-versioned compiler-bridge.jar.

For now just hardcode the Scala versions we want to support as part of the build; we can figure out how to do the runtime download&compile thing later
---
 build.sbt | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 69 insertions(+), 1 deletion(-)

(limited to 'build.sbt')

diff --git a/build.sbt b/build.sbt
index 3031ffef..c1d8719b 100644
--- a/build.sbt
+++ b/build.sbt
@@ -35,6 +35,61 @@ val sharedSettings = Seq(
 
 )
 
+def bridge(bridgeVersion: String) = Project(
+  id = "bridge" + bridgeVersion.replace('.', '_'),
+  base = file("bridge/" + bridgeVersion.replace('.', '_')),
+  settings = Seq(
+    organization := "com.lihaoyi",
+    scalaVersion := bridgeVersion,
+    name := "mill-bridge",
+    crossVersion := CrossVersion.full,
+    libraryDependencies ++= Seq(
+      "org.scala-lang" % "scala-compiler" % scalaVersion.value,
+      "org.scala-sbt" % "compiler-interface" % "1.0.5"
+    ),
+    (sourceGenerators in Compile) += Def.task{
+      import sys.process._
+      import collection.JavaConverters._
+      val v = scalaBinaryVersion.value
+      val url =
+        s"http://repo1.maven.org/maven2/org/scala-sbt/compiler-bridge_$v/1.0.5/compiler-bridge_$v-1.0.5-sources.jar"
+      val curlDest = java.nio.file.Paths.get(target.value.toString, "sources")
+      if (java.nio.file.Files.exists(curlDest)) {
+        java.nio.file.Files.walk(curlDest)
+          .iterator()
+          .asScala
+          .toSeq
+          .reverse
+          .foreach(java.nio.file.Files.delete)
+      }
+
+      java.nio.file.Files.createDirectories(curlDest)
+
+      Seq("curl", "-L", "-o", curlDest.resolve("bridge.jar").toString, url).!
+      Seq("unzip", curlDest.resolve("bridge.jar").toString, "-d", curlDest.toString).!
+
+      val sources = java.nio.file.Files.walk(curlDest)
+        .iterator
+        .asScala
+        .filter(_.toString.endsWith(".scala"))
+        .map(_.toFile)
+        .toSeq
+
+      sources
+    }.taskValue
+  )
+)
+lazy val bridge2_10_6 = bridge("2.10.6")
+lazy val bridge2_11_8 = bridge("2.11.8")
+//lazy val bridge2_11_9 = bridge("2.11.9")
+//lazy val bridge2_11_10 = bridge("2.11.10")
+lazy val bridge2_11_11 = bridge("2.11.11")
+//lazy val bridge2_12_0 = bridge("2.12.0")
+//lazy val bridge2_12_1 = bridge("2.12.1")
+//lazy val bridge2_12_2 = bridge("2.12.2")
+lazy val bridge2_12_3 = bridge("2.12.3")
+lazy val bridge2_12_4 = bridge("2.12.4")
+
 lazy val core = project
   .settings(
     sharedSettings,
@@ -53,5 +108,18 @@ lazy val scalaplugin = project
   .dependsOn(core % "compile->compile;test->test")
   .settings(
     sharedSettings,
-    name := "mill-scalaplugin"
+    name := "mill-scalaplugin",
+    (compile in Test) := {
+      val a = (packageBin in (bridge2_10_6, Compile)).value
+      val b = (packageBin in (bridge2_11_8, Compile)).value
+//      val c = (packageBin in (bridge2_11_9, Compile)).value
+//      val d = (packageBin in (bridge2_11_10, Compile)).value
+      val e = (packageBin in (bridge2_11_11, Compile)).value
+//      val f = (packageBin in (bridge2_12_0, Compile)).value
+//      val g = (packageBin in (bridge2_12_1, Compile)).value
+//      val h = (packageBin in (bridge2_12_2, Compile)).value
+      val i = (packageBin in (bridge2_12_3, Compile)).value
+      val j = (packageBin in (bridge2_12_4, Compile)).value
+      (compile in Test).value
+    }
   )
-- 
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