Improves build.

Author: christian-schlichtherle

.sbtopts

@@ -0,0 +1,4 @@
+-J-Xmx2G
+-J-Xms2G
+-J-Xss6M
+-J-enableassertions

project/BuildSettings.scala

@@ -21,7 +21,7 @@ import sbtrelease.ReleaseStateTransformations._
 
 object BuildSettings {
 
-  def releaseSettings: Seq[Setting[_]] = {
+  lazy val releaseSettings: Seq[Setting[_]] = {
     Seq(
       releaseCrossBuild := false,
       releaseProcess := Seq[ReleaseStep](
@@ -40,7 +40,7 @@ object BuildSettings {
     )
   }
 
-  private def commonSettings: Seq[Setting[_]] = {
+  private lazy val commonSettings: Seq[Setting[_]] = {
     Seq(
       homepage := Some(url("https://christian-schlichtherle.github.com/fun-io/")),
       licenses := Seq("Apache License, Version 2.0" -> url("https://www.apache.org/licenses/LICENSE-2.0")),
@@ -87,21 +87,18 @@ object BuildSettings {
     )
   }
 
-  def aggregateSettings: Seq[Setting[_]] = {
+  lazy val aggregateSettings: Seq[Setting[_]] = {
     commonSettings ++ Seq(
       crossPaths := false,
       publishArtifact := false
     )
   }
 
-  def artifactSettings: Seq[Setting[_]] = {
-    commonSettings ++ inConfig(Test)(Seq(
-      fork := true, // triggers `javaOptions`
-      javaOptions += "-ea"
-    ))
+  lazy val artifactSettings: Seq[Setting[_]] = {
+    commonSettings
   }
 
-  def librarySettings: Seq[Setting[_]] = {
+  lazy val librarySettings: Seq[Setting[_]] = {
     artifactSettings ++ Seq(
       // Support testing Java projects with ScalaTest et al:
       compileOrder := CompileOrder.JavaThenScala,
@@ -111,14 +108,14 @@ object BuildSettings {
     )
   }
 
-  def javaLibrarySettings: Seq[Setting[_]] = {
+  lazy val javaLibrarySettings: Seq[Setting[_]] = {
     librarySettings ++ Seq(
       autoScalaLibrary := false,
       crossPaths := false
     )
   }
 
-  def scalaLibrarySettings: Seq[Setting[_]] = {
+  lazy val scalaLibrarySettings: Seq[Setting[_]] = {
     librarySettings ++ Seq(
       crossScalaVersions := Seq(ScalaVersion_2_10, ScalaVersion_2_11, ScalaVersion_2_12, ScalaVersion_2_13)
     )

project/plugins.sbt

@@ -13,5 +13,4 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 addSbtPlugin("com.github.gseitz" % "sbt-release" % "1.0.11")