From da4b005f0f45b2defbd9a74595debf8855331e74 Mon Sep 17 00:00:00 2001
From: "Ross A. Baker" <ross@rossabaker.com>
Date: Wed, 21 Oct 2020 22:04:15 -0400
Subject: [PATCH] Support Dotty

---
 README.md                                     |  2 +-
 build.sbt                                     |  1 +
 .../org/http4s/sbt/Http4sOrgPlugin.scala      | 14 +++++++----
 .../scala/org/http4s/sbt/SilencerPlugin.scala | 23 +++++++++++--------
 4 files changed, 25 insertions(+), 15 deletions(-)

diff --git a/README.md b/README.md
index 92e88da..00a3257 100644
--- a/README.md
+++ b/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
diff --git a/build.sbt b/build.sbt
index a7efed9..68d83e3 100644
--- a/build.sbt
+++ b/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"),
diff --git a/core/src/main/scala/org/http4s/sbt/Http4sOrgPlugin.scala b/core/src/main/scala/org/http4s/sbt/Http4sOrgPlugin.scala
index be00fb0..ce3e3fd 100644
--- a/core/src/main/scala/org/http4s/sbt/Http4sOrgPlugin.scala
+++ b/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[_]] =
diff --git a/core/src/main/scala/org/http4s/sbt/SilencerPlugin.scala b/core/src/main/scala/org/http4s/sbt/SilencerPlugin.scala
index 8138bef..414fcce 100644
--- a/core/src/main/scala/org/http4s/sbt/SilencerPlugin.scala
+++ b/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")
     )
 }