Merge pull request #8 from fiadliel/add_tests

Update some logic, adds tests

Author: fiadliel

build.sbt

@@ -15,3 +15,7 @@ publishMavenStyle := false
 bintrayPackageLabels := Seq("sbt", "si-2712", "partial-unification", "scala")
 
 licenses += ("MIT", url("http://opensource.org/licenses/MIT"))
+
+libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.5" % "test"
+
+scriptedLaunchOpts += "-Dplugin.version=" + version.value

project/build.properties

@@ -1,2 +1 @@
-sbt.version=0.13.16
-
+sbt.version=1.1.6

project/plugins.sbt

@@ -1,2 +1,4 @@
 addSbtPlugin("org.foundweekends" % "sbt-bintray" % "0.5.1")
 addSbtPlugin("com.typesafe.sbt" % "sbt-git" % "0.9.3")
+
+libraryDependencies += "org.scala-sbt" %% "scripted-plugin" % sbtVersion.value

src/main/scala/PartialUnification.scala

@@ -8,40 +8,52 @@ object PartialUnification extends AutoPlugin {
   override def trigger = allRequirements
 
   object autoImport {
-    val partialUnificationModule = settingKey[ModuleID]("Module to add partial unification to scala 2.10/2.11")
+    val partialUnificationModule = settingKey[ModuleID](
+      "Module to add partial unification to scala 2.10/2.11")
   }
 
   import autoImport._
 
+  def reportError(scalaVersion: String) = {
+    sys.error(s"scala version $scalaVersion is not supported by this plugin.")
+  }
+
   def pluginOrFlag(scalaVersion: String, pluginModule: ModuleID): Resolution = {
-    val pluginDependency = Resolution.Plugin(compilerPlugin(pluginModule cross CrossVersion.full))
+    val pluginDependency =
+      Resolution.Plugin(compilerPlugin(pluginModule cross CrossVersion.full))
     val flag = Resolution.Flag("-Ypartial-unification")
     val VersionNumber((major +: minor +: patch +: _), tags, _) = scalaVersion
 
     (major, minor, patch, tags) match {
       case (2, 10, p, _) if p >= 6 => pluginDependency
-      case (2, 11, 8, _) => pluginDependency
+      case (2, 10, _, _)           => reportError(scalaVersion)
+
+      case (2, 11, 8, _)           => pluginDependency
       case (2, 11, p, _) if p >= 9 => flag
+      case (2, 11, _, _)           => reportError(scalaVersion)
+
       case (2, 12, _, _) => flag
-      case (2, 13, _, milestone +: _) if milestone == "M1" || milestone == "M2" || milestone == "M3" => flag    // ignoring the M4 snapshot
+
+      case (2, 13, 0, milestone +: _)
+          if milestone == "M1" || milestone == "M2" || milestone == "M3" =>
+        flag // ignoring the M4 snapshot
+
       case _ => Resolution.NothingHappens
     }
   }
 
   override val projectSettings = Seq(
     partialUnificationModule := "com.milessabin" % "si2712fix-plugin" % "1.2.0",
-
     libraryDependencies ++= {
       pluginOrFlag(scalaVersion.value, partialUnificationModule.value) match {
         case Resolution.Plugin(id) => Seq(id)
-        case _ => Seq.empty
+        case _                     => Seq.empty
       }
     },
-
     scalacOptions ++= {
       pluginOrFlag(scalaVersion.value, partialUnificationModule.value) match {
         case Resolution.Flag(flag) => Seq(flag)
-        case _ => Seq.empty
+        case _                     => Seq.empty
       }
     }
   )

src/sbt-test/sbt-partial-unification/2_10_7/Main.scala

@@ -0,0 +1,8 @@
+object Test {
+  def foo[F[_], A](fa: F[A]): String =
+    fa.toString
+
+  foo { x: Int =>
+    x * 2
+  }
+}

src/sbt-test/sbt-partial-unification/2_10_7/build.sbt

@@ -0,0 +1 @@
+scalaVersion := "2.10.7"

src/sbt-test/sbt-partial-unification/2_10_7/project/plugins.sbt

@@ -0,0 +1,2 @@
+addSbtPlugin(
+  "org.lyranthe.sbt" % "partial-unification" % sys.props("plugin.version"))

src/sbt-test/sbt-partial-unification/2_10_7/test

@@ -0,0 +1 @@
+> compile

src/sbt-test/sbt-partial-unification/2_11_11/Main.scala

@@ -0,0 +1,8 @@
+object Test {
+  def foo[F[_], A](fa: F[A]): String =
+    fa.toString
+
+  foo { x: Int =>
+    x * 2
+  }
+}

src/sbt-test/sbt-partial-unification/2_11_11/build.sbt

@@ -0,0 +1 @@
+scalaVersion := "2.11.11"