From 521e80b61bc5c02bd09087ac6b31690f3d32131a Mon Sep 17 00:00:00 2001
From: Adrien Piquerez <adrien.piquerez@gmail.com>
Date: Fri, 25 Dec 2020 10:40:45 +0100
Subject: [PATCH] Fix semanticdb on Scala > 3.0.0-M3

---
 main/src/main/scala/sbt/plugins/SemanticdbPlugin.scala | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/main/src/main/scala/sbt/plugins/SemanticdbPlugin.scala b/main/src/main/scala/sbt/plugins/SemanticdbPlugin.scala
index d42e0f535..0d970663c 100644
--- a/main/src/main/scala/sbt/plugins/SemanticdbPlugin.scala
+++ b/main/src/main/scala/sbt/plugins/SemanticdbPlugin.scala
@@ -43,7 +43,9 @@ object SemanticdbPlugin extends AutoPlugin {
     },
     semanticdbOptions += {
       val sv = scalaVersion.value
-      if (ScalaInstance.isDotty(sv)) "-Ysemanticdb"
+      if (sv.startsWith("0.") || sv.startsWith("3.0.0-M1") || sv.startsWith("3.0.0-M2"))
+        "-Ysemanticdb"
+      else if (sv.startsWith("3.")) "-Xsemanticdb"
       else "-Yrangepos"
     }
   ) ++