Intellij SBT项目：如何更改内容根？

通过添加scalaSource in Test := baseDirectory.value / "test" "/scala",到Build.scala文件中，我已经能够将“ scala”文件夹设置为测试源，但是父级“ test”文件夹仍然是测试源：

据我所知，这是一个从Play继承的设置，因为如果我删除了.enablePlugins(PlayScala)代码，“ test”文件夹将不再是测试源。按照https://www.playframework.com/documentation/2.5.x/Anatomy#Default-SBT-layout中的说明，我禁用了播放布局，然后手动添加了从https复制的源和资源目录： //github.com/playframework/playframework/blob/master/framework/src/sbt-plugin/src/main/scala/play/sbt/PlayLayoutPlugin.scala#L9，仅修改测试源，并添加我自己的资源文件夹。我修改后的Build.scala文件现在是：

val main = Project("Mp3Streamer", file("."))
      .enablePlugins(PlayScala)
      .disablePlugins(PlayLayoutPlugin)
      .settings(
           target := baseDirectory.value / "target",

           sourceDirectory in Compile := baseDirectory.value / "app",
           // My change
           sourceDirectory in Test := baseDirectory.value / "test" / "scala",

           resourceDirectory in Compile := baseDirectory.value / "conf",

           scalaSource in Compile := baseDirectory.value / "app",
           // My change
           scalaSource in Test := baseDirectory.value / "test" / "scala",
           // I've added this resource
           resourceDirectory in Test := baseDirectory.value / "test" / "resources",

           javaSource in Compile := baseDirectory.value / "app",

           sourceDirectories in(Compile, TwirlKeys.compileTemplates) := Seq((sourceDirectory in Compile).value),
           sourceDirectories in(Test, TwirlKeys.compileTemplates) := Seq((sourceDirectory in Test).value),

           // sbt-web
           sourceDirectory in Assets := (sourceDirectory in Compile).value / "assets",
           sourceDirectory in TestAssets := (sourceDirectory in Test).value / "assets",


           resourceDirectory in Assets := baseDirectory.value / "public",

           // Native packager
           sourceDirectory in Universal := baseDirectory.value / "dist",

           // Everything else is the same as the original Build.scala file

老实说，这感觉很hacky，以至于我可能最终会修改目录结构以匹配Play的默认设置...但这是很重要的原则！