From 2e2f1fe17832c348f2cc5d38e691fbd1e7012898 Mon Sep 17 00:00:00 2001
From: Seth Tisue <seth@tisue.net>
Date: Wed, 29 Mar 2023 16:16:43 +0200
Subject: [PATCH 1/2] don't pass unsupported options to Scala 3 compiler

---
 build.sbt | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/build.sbt b/build.sbt
index ad9c9bd5..ea56dcc6 100644
--- a/build.sbt
+++ b/build.sbt
@@ -12,11 +12,17 @@ inThisBuild(Seq(
   scmInfo := Some(ScmInfo(url("https://github.com/lightbend/mima"), "scm:git:git@github.com:lightbend/mima.git")),
   dynverVTagPrefix := false,
   scalaVersion := scala212,
-  scalacOptions ++= Seq("-feature", "-Xsource:3", "-Xlint", "-Wconf:cat=deprecation&msg=Stream|JavaConverters:s"),
   resolvers ++= (if (isStaging) List(stagingResolver) else Nil),
   publishTo := Some(if (isSnapshot.value) Opts.resolver.sonatypeOssSnapshots.head else Opts.resolver.sonatypeStaging),
 ))
 
+def compilerOptions(scalaVersion: String): Seq[String] =
+  Seq("-feature", "-Wconf:cat=deprecation&msg=Stream|JavaConverters:s") ++
+  (CrossVersion.partialVersion(scalaVersion) match {
+    case Some((2, _)) => Seq("-Xsource:3", "-Xlint")
+    case _ => Seq()
+  })
+
 // Useful to self-test releases
 val stagingResolver = "Sonatype OSS Staging" at "https://oss.sonatype.org/content/repositories/staging"
 def isStaging = sys.props.contains("mimabuild.staging")
@@ -44,6 +50,7 @@ val munit = Def.setting("org.scalameta" %%% "munit" % "1.0.0-M7")
 val core = crossProject(JVMPlatform, NativePlatform).crossType(CrossType.Pure).settings(
   name := "mima-core",
   crossScalaVersions ++= Seq(scala213, scala3),
+  scalacOptions ++= compilerOptions(scalaVersion.value),
   libraryDependencies += munit.value % Test,
   testFrameworks += new TestFramework("munit.Framework"),
   MimaSettings.mimaSettings,
@@ -62,6 +69,7 @@ val core = crossProject(JVMPlatform, NativePlatform).crossType(CrossType.Pure).s
 
 val sbtplugin = project.enablePlugins(SbtPlugin).dependsOn(core.jvm).settings(
   name := "sbt-mima-plugin",
+  scalacOptions ++= compilerOptions(scalaVersion.value),
   // drop the previous value to drop running Test/compile
   scriptedDependencies := Def.task(()).dependsOn(publishLocal, core.jvm / publishLocal).value,
   scriptedLaunchOpts += s"-Dplugin.version=${version.value}",
@@ -79,6 +87,7 @@ val functionalTests = Project("functional-tests", file("functional-tests"))
     libraryDependencies += "org.scala-lang" % "scala-reflect" % scalaVersion.value,
     libraryDependencies += munit.value,
     testFrameworks += new TestFramework("munit.Framework"),
+    scalacOptions ++= compilerOptions(scalaVersion.value),
     //Test / run / fork := true,
     //Test / run / forkOptions := (Test / run / forkOptions).value.withWorkingDirectory((ThisBuild / baseDirectory).value),
     // Test / testOnly / watchTriggers += baseDirectory.value.toGlob / "src" / "test" / **,

From 220350594a391bdfa1083d9b0e644ad35bd8884a Mon Sep 17 00:00:00 2001
From: Seth Tisue <seth@tisue.net>
Date: Wed, 29 Mar 2023 16:17:32 +0200
Subject: [PATCH 2/2] set versionScheme

---
 build.sbt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/build.sbt b/build.sbt
index ea56dcc6..d597931d 100644
--- a/build.sbt
+++ b/build.sbt
@@ -11,6 +11,7 @@ inThisBuild(Seq(
   ),
   scmInfo := Some(ScmInfo(url("https://github.com/lightbend/mima"), "scm:git:git@github.com:lightbend/mima.git")),
   dynverVTagPrefix := false,
+  versionScheme := Some("early-semver"),
   scalaVersion := scala212,
   resolvers ++= (if (isStaging) List(stagingResolver) else Nil),
   publishTo := Some(if (isSnapshot.value) Opts.resolver.sonatypeOssSnapshots.head else Opts.resolver.sonatypeStaging),