Add sbt-dotty test

And take scalaModuleInfo.overrideScalaVersion into account.
Also requires the loosened cross version application of the previous
commit.

modules/sbt-coursier/src/main/scala/coursier/sbtcoursier/ResolutionTasks.scala

@@ -85,7 +85,7 @@ object ResolutionTasks {
 
       val (currentProject, fallbackDependencies, configGraphs) = currentProjectTask.value
 
-      val autoScalaLib = autoScalaLibrary.value
+      val autoScalaLib = autoScalaLibrary.value && scalaModuleInfo.value.forall(_.overrideScalaVersion)
 
       val resolvers = resolversTask.value
 

modules/sbt-coursier/src/sbt-test/shared-1/dotty/LICENSE

@@ -0,0 +1,25 @@
+Copyright (c) 2015 The dotty-example-project contributors.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. The name of the author may not be used to endorse or promote products
+   derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+

modules/sbt-coursier/src/sbt-test/shared-1/dotty/README.md

@@ -0,0 +1 @@
+Cut-n-pasted from https://github.com/lampepfl/dotty-example-project/tree/a753b14e281bbaa6c69f26298913ad6feba969c7

modules/sbt-coursier/src/sbt-test/shared-1/dotty/build.sbt

@@ -0,0 +1 @@
+scalaVersion := "0.13.0-RC1"

modules/sbt-coursier/src/sbt-test/shared-1/dotty/project/build.properties

@@ -0,0 +1,3 @@
+# sbt-coursier scripted tests: required, as we default to sbt 1.0.3,
+# but sbt-dotty requires sbt >= 1.2.7
+sbt.version=1.2.7

modules/sbt-coursier/src/sbt-test/shared-1/dotty/project/plugins.sbt

@@ -0,0 +1,2 @@
+addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.3.0")
+addSbtCoursier

modules/sbt-coursier/src/sbt-test/shared-1/dotty/project/project/plugins.sbt

@@ -0,0 +1,13 @@
+addSbtPlugin {
+
+  val name = sys.props.getOrElse(
+    "plugin.name",
+    sys.error("plugin.name Java property not set")
+  )
+  val version = sys.props.getOrElse(
+    "plugin.version",
+    sys.error("plugin.version Java property not set")
+  )
+
+  "io.get-coursier" % name % version
+}

modules/sbt-coursier/src/sbt-test/shared-1/dotty/src/main/scala/Main.scala

@@ -0,0 +1,16 @@
+
+object Main {
+
+  def main(args: Array[String]): Unit = {
+
+    runExample("Trait Params")(TraitParams.test)
+
+  }
+
+  private def runExample(name: String)(f: => Unit) = {
+    println(Console.MAGENTA + s"$name example:" + Console.RESET)
+    f
+    println()
+  }
+
+}

modules/sbt-coursier/src/sbt-test/shared-1/dotty/src/main/scala/TraitParams.scala

@@ -0,0 +1,21 @@
+/**
+  * Trait Parameters: https://dotty.epfl.ch/docs/reference/other-new-features/trait-parameters.html
+  */
+object TraitParams {
+
+  trait Base(val msg: String)
+  class A extends Base("Hello")
+  class B extends Base("Dotty!")
+
+  // Union types only exist in Dotty, so there's no chance that this will accidentally be compiled with Scala 2
+  private def printMessages(msgs: (A | B)*) = println(msgs.map(_.msg).mkString(" "))
+
+  def test: Unit = {
+
+    printMessages(new A, new B)
+
+    // Sanity check the classpath: this won't run if the dotty jar is not present.
+    val x: Int => Int = z => z
+    x(1)
+  }
+}

modules/sbt-coursier/src/sbt-test/shared-1/dotty/test

@@ -0,0 +1 @@
+> run

modules/sbt-lm-coursier/src/main/scala/coursier/sbtlmcoursier/LmCoursierPlugin.scala

@@ -7,7 +7,7 @@ import coursier.sbtcoursiershared.SbtCoursierShared
 import sbt.{AutoPlugin, Classpaths, Def, Setting, Task, taskKey}
 import sbt.Project.inTask
 import sbt.KeyRanks.DTask
-import sbt.Keys.{appConfiguration, autoScalaLibrary, classpathTypes, dependencyResolution, excludeDependencies, scalaBinaryVersion, scalaOrganization, scalaVersion, streams, updateClassifiers, updateSbtClassifiers}
+import sbt.Keys.{appConfiguration, autoScalaLibrary, classpathTypes, dependencyResolution, excludeDependencies, scalaBinaryVersion, scalaModuleInfo, scalaOrganization, scalaVersion, streams, updateClassifiers, updateSbtClassifiers}
 import sbt.librarymanagement.DependencyResolution
 
 object LmCoursierPlugin extends AutoPlugin {
@@ -84,7 +84,7 @@ object LmCoursierPlugin extends AutoPlugin {
           streams.value.log
         )
         val fallbackDeps = coursierFallbackDependencies.value
-        val autoScalaLib = autoScalaLibrary.value
+        val autoScalaLib = autoScalaLibrary.value && scalaModuleInfo.value.forall(_.overrideScalaVersion)
         val profiles = mavenProfiles.value
 
         val authenticationByRepositoryId = coursierCredentials.value.mapValues(_.authentication)