Merge pull request #33 from http4s/dotty-support

Support Dotty

README.md

@@ -59,4 +59,4 @@ Enable with `enablePlugins(SilencerPlugin)`
 
 * Adds the [silencer](https://github.com/ghik/silencer) compiler plugin to suppress warnings.
 * Adds the supporting library to `CompileTime` and `Test` scopes, so it doesn't leave a trace in production.
-
+* Disabled automatically in Dotty

build.sbt

@@ -11,6 +11,7 @@ lazy val core = project
   .settings(commonSettings)
   .settings(
     name := "sbt-http4s-org",
+    addSbtPlugin("ch.epfl.lamp" % "sbt-dotty" % "0.4.4"),
     addSbtPlugin("com.github.cb372" % "sbt-explicit-dependencies" % "0.2.15"),
     addSbtPlugin("com.lightbend.sbt" % "sbt-java-formatter" % "0.6.0"),
     addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "0.8.1"),

core/src/main/scala/org/http4s/sbt/Http4sOrgPlugin.scala

@@ -4,6 +4,7 @@ import sbt._
 import sbt.Keys._
 
 import com.typesafe.sbt.SbtGit.git
+import dotty.tools.sbtplugin.DottyPlugin.autoImport._
 import de.heikoseeberger.sbtheader.{AutomateHeaderPlugin, LicenseDetection, LicenseStyle}
 import de.heikoseeberger.sbtheader.HeaderPlugin.autoImport._
 import java.lang.{Runtime => JRuntime}
@@ -34,11 +35,14 @@ object Http4sOrgPlugin extends AutoPlugin {
 
   val scalaSettings: Seq[Setting[_]] =
     Seq(
-      scalacOptions ++=
-        Seq(
-          "-Ybackend-parallelism",
-          math.min(JRuntime.getRuntime.availableProcessors, 16).toString
-        )
+      scalacOptions ++= {
+        if (isDotty.value) Seq.empty
+        else
+          Seq(
+            "-Ybackend-parallelism",
+            math.min(JRuntime.getRuntime.availableProcessors, 16).toString
+          )
+      }
     )
 
   val docSettings: Seq[Setting[_]] =

core/src/main/scala/org/http4s/sbt/SilencerPlugin.scala

@@ -3,8 +3,8 @@ package org.http4s.sbt
 import sbt._
 import sbt.Keys._
 
+import dotty.tools.sbtplugin.DottyPlugin.autoImport._
 import explicitdeps.ExplicitDepsPlugin.autoImport._
-
 import CompileTimePlugin.CompileTime
 
 object SilencerPlugin extends AutoPlugin {
@@ -20,14 +20,19 @@ object SilencerPlugin extends AutoPlugin {
   override lazy val projectSettings: Seq[Setting[_]] =
     Seq(
       silencerVersion := "1.7.0",
-      libraryDependencies ++= Seq(
-        compilerPlugin(
-          ("com.github.ghik" % "silencer-plugin" % silencerVersion.value).cross(CrossVersion.full)),
-        ("com.github.ghik" % "silencer-lib" % silencerVersion.value % CompileTime)
-          .cross(CrossVersion.full),
-        ("com.github.ghik" % "silencer-lib" % silencerVersion.value % Test)
-          .cross(CrossVersion.full)
-      ),
+      libraryDependencies ++= {
+        if (isDotty.value) Seq.empty
+        else
+          Seq(
+            compilerPlugin(
+              ("com.github.ghik" % "silencer-plugin" % silencerVersion.value).cross(
+                CrossVersion.full)),
+            ("com.github.ghik" % "silencer-lib" % silencerVersion.value % CompileTime)
+              .cross(CrossVersion.full),
+            ("com.github.ghik" % "silencer-lib" % silencerVersion.value % Test)
+              .cross(CrossVersion.full)
+          )
+      },
       unusedCompileDependenciesFilter -= moduleFilter("com.github.ghik", name = "silencer-lib")
     )
 }