Add workaround for sbt 1.0.0-M6

project/Settings.scala

@@ -178,11 +178,70 @@ object Settings {
     )
   }
 
+  lazy val scripted100M6Workaround = {
+
+    // see https://github.com/sbt/sbt/issues/3245#issuecomment-306045952
+
+    ScriptedPlugin.scripted := Def.inputTask {
+
+      val args = ScriptedPlugin
+        .asInstanceOf[{
+          def scriptedParser(f: File): complete.Parser[Seq[String]]
+        }]
+        .scriptedParser(sbtTestDirectory.value)
+        .parsed
+
+      val prereq: Unit = scriptedDependencies.value
+      val scriptedTests = ScriptedPlugin.scriptedTests.value
+
+      try {
+        if(sbtVersion.in(pluginCrossBuild).value == "1.0.0-M6")
+          scriptedTests.asInstanceOf[{
+            def run(
+              x1: File,
+              x2: Boolean,
+              x3: Array[String],
+              x4: File,
+              x5: Array[String],
+              x6: java.util.List[File]
+            ): Unit
+          }].run(
+            sbtTestDirectory.value,
+            scriptedBufferLog.value,
+            args.toArray,
+            sbtLauncher.value,
+            scriptedLaunchOpts.value.toArray,
+            new java.util.ArrayList()
+          )
+        else
+          scriptedTests.asInstanceOf[{
+            def run(
+              x1: File,
+              x2: Boolean,
+              x3: Array[String],
+              x4: File,
+              x5: Array[String]
+            ): Unit
+          }].run(
+            sbtTestDirectory.value,
+            scriptedBufferLog.value,
+            args.toArray,
+            sbtLauncher.value,
+            scriptedLaunchOpts.value.toArray
+          )
+      } catch {
+        case e: java.lang.reflect.InvocationTargetException =>
+          throw e.getCause
+      }
+    }.evaluated
+  }
+
   lazy val plugin =
     javaScalaPluginShared ++
     divertThingsPlugin ++
     withScriptedTests ++
     Seq(
+      scripted100M6Workaround,
       scriptedLaunchOpts ++= Seq(
         "-Xmx1024M",
         "-Dplugin.version=" + version.value,