如何将设置传递给在playframework挂钩中运行的sbt自定义插件的任务？

Question

我正在运行playframework应用程序，并且试图在playframework运行挂钩中运行sbt任务。该任务来自我编写的自定义sbt插件。我很难将设置键传递给任务，该任务使用默认设置，而不是我在build.sbt文件中定义的设置。我在做什么错了？

plugins.sbt：

addSbtPlugin("com.myorg" % "sbt-twirl-renderer" % "0.0.0")

build.sbt：

lazy val root = (project in file("."))
  .enablePlugins(PlayScala, SbtWeb, TwirlTemplateRendererPlugin)
....
    import play.sbt.PlayRunHook
    val onAppStated: State => PlayRunHook = state => PlayRunHook.makeRunHookFromOnStarted { address =>
      appPath := "/myAppPath" <======= defined setting in build.sbt
      appPort := address.getPort <===
      outputDirectory := "./some_folder" <===
      outputFileName := "auto_generated.html" <===
      Project.runTask(renderTwirl, state)
    }
    PlayKeys.playRunHooks += onAppStated(state.value)

插件代码：

object TwirlTemplateRendererPlugin extends AutoPlugin {

  object autoImport {
    val appPath = settingKey[String]("Application url base path")
    val appPort = settingKey[Int]("Application port")
    val outputDirectory = settingKey[String]("Generated file output directory")
    val outputFileName = settingKey[String]("Generated file name")
    val renderTwirl = taskKey[Unit]("Renders twirl template")
  }

  import autoImport._

  override lazy val projectSettings = Seq(
    appPath := "", <======= default setting in the plugin's code
    appPort := 9000, <===
    outputDirectory := "", <===
    outputFileName := "", <===
    renderTwirl := {
      doRender(appPath.value, appPort.value, outputDirectory.value, outputFileName.value)
    }
  )

  private def doRender(path: String, port: Int, dir: String, file: String): Unit = {
    val htmlContent = getHtmlContentWithHttpRequest(port, path)
    createDir(dir)
    createFile(htmlContent, dir, file)
  }

  private def getHtmlContentWithHttpRequest(port: Int, path: String): String = {
    val url = s"http://localhost:$port" + (if (path.startsWith("/")) path else s"/$path")
    val connection = new URL(url).openConnection.asInstanceOf[HttpURLConnection]
    connection.setConnectTimeout(120000)
    connection.setReadTimeout(120000)
    connection.setRequestMethod("GET")
    val inputStream = connection.getInputStream
    val content = scala.io.Source.fromInputStream(inputStream).mkString
    if (inputStream != null) inputStream.close()
    content
  }

  private def createDir(dir: String) = {
    val directory = new File(dir)
    if (!directory.exists()) {
      directory.mkdir()
    }
  }

  private def createFile(content: String, dir: String, file: String) = {
    Files.write(Paths.get(s"$dir/$file"), content.getBytes(StandardCharsets.UTF_8))
  }

}