Drop scalaVersionsByJvm and add sbt-travisci

README.md

@@ -45,18 +45,6 @@ repoName     := "<GitHub repo name>" // the repo under github.com/scala/, only r
 organization := "<org>"              // only required if different from "org.scala-lang.modules"
 version      := "<module version>"
 
-// The plugin uses `scalaVersionsByJvm` to set `crossScalaVersions in ThisBuild` according to the JVM major version.
-// The `scalaVersion in ThisBuild` is set to `crossScalaVersions.value.head`.
-scalaVersionsByJvm in ThisBuild := {
-  val v211 = "2.11.12"
-  val v212 = "2.12.8"
-  val v213 = "2.13.0-RC1"
-  // Map[JvmMajorVersion, List[(ScalaVersion, UseForPublishing)]]
-  Map(
-    8 -> List(v211 -> true, v212 -> true, v213 -> true),
-    9 -> List(v211, v212, v213).map(_ -> false))
-}
-
 mimaPreviousVersion := Some("1.0.0") // enables MiMa (`None` by default, which disables it)
 
 OsgiKeys.exportPackage := Seq(s"<exported package>;version=${version.value}")

build.sbt

@@ -9,3 +9,4 @@ licenses            := Seq(("Apache-2.0", url("https://www.apache.org/licenses/L
 
 addSbtPlugin("com.typesafe.sbt" % "sbt-osgi" % "0.9.5")
 addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "0.5.0")
+addSbtPlugin("com.dwijnand" % "sbt-travisci" % "1.2.0")

src/main/scala/ScalaModulePlugin.scala

@@ -13,7 +13,6 @@ import sbt.librarymanagement.{ UnresolvedWarningConfiguration, UpdateConfigurati
 object ScalaModulePlugin extends AutoPlugin {
   val repoName            = settingKey[String]("The name of the repository under github.com/scala/.")
   val mimaPreviousVersion = settingKey[Option[String]]("The version of this module to compare against when running MiMa.")
-  val scalaVersionsByJvm  = settingKey[Map[Int, List[(String, Boolean)]]]("For a Java major version (6, 8, 9), a list of a Scala version and a flag indicating whether to use this combination for publishing.")
 
   // See https://github.com/sbt/sbt/issues/2082
   override def requires = plugins.JvmPlugin
@@ -22,41 +21,7 @@ object ScalaModulePlugin extends AutoPlugin {
 
   // Settings in here are implicitly `in ThisBuild`
   override def buildSettings: Seq[Setting[_]] = Seq(
-    scalaVersionsByJvm := Map.empty,
-
-    crossScalaVersions := {
-      val OneDot = """1\.(\d).*""".r // 1.6, 1.8
-      val Maj    = """(\d+).*""".r   // 9
-      val javaVersion = System.getProperty("java.version") match {
-        case OneDot(n) => n.toInt
-        case Maj(n)    => n.toInt
-        case v         => throw new RuntimeException(s"Unknown Java version: $v")
-      }
-
-      val isTravis = Option(System.getenv("TRAVIS")).exists(_ == "true") // `contains` doesn't exist in Scala 2.10
-      val isTravisPublishing = Option(System.getenv("TRAVIS_TAG")).exists(_.trim.nonEmpty)
-
-      val byJvm = scalaVersionsByJvm.value
-      if (byJvm.isEmpty)
-        throw new RuntimeException(s"Make sure to define `scalaVersionsByJvm in ThisBuild` in `build.sbt` in the root project, using the `ThisBuild` scope.")
-
-      val scalaVersions = byJvm.getOrElse(javaVersion, Nil) collect {
-        case (v, publish) if !isTravisPublishing || publish => v
-      }
-      if (scalaVersions.isEmpty) {
-        if (isTravis) {
-          sLog.value.warn(s"No Scala version in `scalaVersionsByJvm` in build.sbt needs to be released on Java major version $javaVersion.")
-          // Exit successfully, don't fail the (travis) build. This happens for example if `openjdk7`
-          // is part of the travis configuration for testing, but it's not used for releasing against
-          // any Scala version.
-          System.exit(0)
-        } else
-          throw new RuntimeException(s"No Scala version for Java major version $javaVersion. Change your Java version or adjust `scalaVersionsByJvm` in build.sbt.")
-      }
-      scalaVersions
-    },
-    enableOptimizerInlineFrom := "<sources>",
-    scalaVersion := crossScalaVersions.value.head
+    enableOptimizerInlineFrom := "<sources>"
   )
 
   val enableOptimizerInlineFrom = settingKey[String]("The value passed to -opt-inline-from by `enableOptimizer` on 2.13 and higher")