Question

我只在需要时才尝试在项目中生成源。就我而言，“需要”是指任何相关项目已更改。

我有始终在运行生成代码的工作代码：

def runCodeGeneration(project: Project) = sourceGenerators in Compile += Def.taskDyn {
  val dir = (sourceManaged in Compile).value
  Def.task {
    (project / run in Compile).
      toTask(" " + dir.getAbsolutePath).
      value
    collectFiles(dir)
  }
}.taskValue

lazy val doObject = (project in file("components/objects")).
    dependsOn(doSpec).
    settings(
        runCodeGeneration(doSpec)
    )

lazy val doSpec = (project in file("components/spec"))

从this question看来，我可以使用(managedClasspath in Compile) map { cp => cp.files }在依赖关系中获取实际文件

适应this answer，我正在尝试类似的事情

def runCodeGeneration(project: Project) =  {
  val dir = (sourceManaged in Compile).value
    (project / run in Compile).
      toTask(" " + dir.getAbsolutePath).
      value
    collectFiles(dir)
}

def checkCodeGeneration(project: Project) = sourceGenerators in Compile += Def task {

        val cachedFun = FileFunction.cached(
                streams.value.cacheDirectory / "doGeneration"
            ) { (in: Set[File]) =>
                runCodeGeneration(project).toSet
            }
        cachedFun((managedClasspath in Compile) map { cp => cp.files }).toSeq
    }.taskValue

lazy val doObject = (project in file("components/objects")).
    dependsOn(doSpec).
    settings(
        checkCodeGeneration(doSpec)
    )

那失败了：

/Users/me/build.sbt:146: error: type mismatch;
 found   : sbt.Def.Initialize[sbt.Task[Seq[java.io.File]]]
 required: Set[java.io.File]
        cachedFun((managedClasspath in Compile) map { cp => cp.files }).toSeq
                                                ^
[error] sbt.compiler.EvalException: Type error in expression
[error] sbt.compiler.EvalException: Type error in expression
[error] Use 'last' for the full log.

似乎我只是添加一些.taskValue和.toSet来将实际值解包为所需的类型，但我不知道将它们放在哪里。

我将如何进行这项工作？

本地依赖项更改时运行sbt任务

0 个答案: