Scala 将SBT任务添加到播放项目'；s的完整构建配置

如何将任务添加到使用完整构建配置（例如

build.scala

）的Play（SBT）项目中，使其实际可见并可以使用

显然，我所做的还不够。当我运行

play tasks

时，新任务未列出，我无法运行它

Build.scala如下所示：

object ApplicationBuild extends Build {

  val hello = TaskKey[Unit]("hello", "Prints 'Hello World'")

  val helloTask = hello := {
    println("Hello World")
  }  

  val appName         = "test"
  val appVersion      = "1.0-SNAPSHOT"        
  val appDependencies = Seq(
    jdbc
  )

  val main = play.Project(appName, appVersion, appDependencies).settings(       
    resolvers += "Sonatype snapshots" at "http://oss.sonatype.org/content/repositories/snapshots/"      
  )
}

val main = play.Project(appName, appVersion, appDependencies).settings(
  resolvers += "Sonatype snapshots" at "http://oss.sonatype.org/content/repositories/snapshots/",
  helloTask
)

---

将

helloTask

添加为

settings

方法中的设置，如下所示：

object ApplicationBuild extends Build {

  val hello = TaskKey[Unit]("hello", "Prints 'Hello World'")

  val helloTask = hello := {
    println("Hello World")
  }  

  val appName         = "test"
  val appVersion      = "1.0-SNAPSHOT"        
  val appDependencies = Seq(
    jdbc
  )

  val main = play.Project(appName, appVersion, appDependencies).settings(       
    resolvers += "Sonatype snapshots" at "http://oss.sonatype.org/content/repositories/snapshots/"      
  )
}

val main = play.Project(appName, appVersion, appDependencies).settings(
  resolvers += "Sonatype snapshots" at "http://oss.sonatype.org/content/repositories/snapshots/",
  helloTask
)

---

请参阅SBT0.12.4，因为您使用较旧的方法定义任务，使用

TaskKey

和双赋值（

helloTask=hello:=

）。您可能会发现对的引用非常有用（在页面底部）。

很好，现在我可以从控制台运行它了！还有一件事：当我运行“tasks”或“tasks-v”时，我仍然看不到它？