playframework - 如何从 SBT 运行 webpack

Question

我正在开发一个 Play 2.4 应用程序，并希望 SBT 在编译期间运行 webpack 以生成静态 Assets 。

我试过https://github.com/stejskal/sbt-webpack但这似乎对我不起作用。

Answer 1

我通过定义一个自定义 sbt 任务来让它工作，该任务用于 dist 的依赖项。和 stage打包应用程序时调用的任务。

任务的代码很简单:

lazy val webpack = taskKey[Unit]("Run webpack when packaging the application")

  def runWebpack(file: File) = {
    Process("webpack", file) !
  }

  webpack := {
    if(runWebpack(baseDirectory.value) != 0) throw new Exception("Something goes wrong when running webpack.")
  }

  dist <<= dist dependsOn webpack

  stage <<= stage dependsOn webpack

在开发模式下，我使用 play action hooks运行 webpack watch当代码更改时:

PlayKeys.playRunHooks <+= baseDirectory.map(Webpack.apply)

与 Webpack定义如下:

import java.net.InetSocketAddress
import play.sbt.PlayRunHook
import sbt._

object Webpack {
  def apply(base: File): PlayRunHook = {
    object WebpackHook extends PlayRunHook {
      var process: Option[Process] = None

      override def beforeStarted() = {
        process = Option(
          Process("webpack", base).run()
        )
      }

      override def afterStarted(addr: InetSocketAddress) = {
        process = Option(
          Process("webpack --watch", base).run()
        )
      }

      override def afterStopped() = {
        process.foreach(_.destroy())
        process = None
      }
    }

    WebpackHook
  }
}

它就像一个魅力。你可以在我的 github 帐户中找到一个使用这种技术的示例游戏项目: https://github.com/nouhoum/play-react-webpack/blob/master/webpack.sbt

我希望这有帮助 ;-)