如何获取 sbt 项目的所有项目依赖项的源目录? [英] How to get source directories of all project dependencies of an sbt project?
问题描述
我正在尝试实现一个 sbt 任务,它收集使用项目的 dependsOn
方法指定的项目的所有源目录.我最终得到了这段代码:
I'm trying to implement an sbt task which collects all the source directories of projects specified using dependsOn
method of a project. I end up with this piece of code:
def sourcesOfDependencies(p: Project): Def.Initialize[Task[Seq[File]]] =
Def.taskDyn {
p.dependencies
.map(dep => (sourceDirectory in dep.project).toTask.map(Seq(_)))
.reduce((t1, t2) =>
t1.flatMap(s1 => t2.map(s2 => s1 ++ s2).taskValue)
)
}
sources := Def.taskDyn { sourcesOfDependencies(myProject) }.value
对我来说它应该可以工作但它无法编译:
As for me it should work but it fails to compile:
[error] /home/visa/src/Playtech-BIT/project/SparkDeployment.scala:57:32: The evaluation of `map` inside an anonymous function is prohibited.
[error]
[error] Problem: Task invocations inside anonymous functions are evaluated independently of whether the anonymous function is invoked or not.
[error]
[error] Solution:
[error] 1. Make `map` evaluation explicit outside of the function body if you don't care about its evaluation.
[error] 2. Use a dynamic task to evaluate `map` and pass that value as a parameter to an anonymous function.
[error]
[error] t1.flatMap(s1 => t2.map(s2 => s1 ++ s2).taskValue)
[error] ^
[error] /home/visa/src/Playtech-BIT/project/SparkDeployment.scala:57:26: Illegal dynamic reference: t2
[error] t1.flatMap(s1 => t2.map(s2 => s1 ++ s2).taskValue)
[error] ^
[error] /home/visa/src/Playtech-BIT/project/SparkDeployment.scala:57:39: Illegal dynamic reference: s1
[error] t1.flatMap(s1 => t2.map(s2 => s1 ++ s2).taskValue)
有人可以建议如何应用建议的解决方案吗?或者也许有更简单的方法来实现我的目标?
Could anyone advise on how to apply the proposed solution? Or maybe there is a simpler way to achieve my goal?
推荐答案
我一直在努力解决类似的问题,但最终找到了一个 回答.
I've been struggling with a similar problem but finally found an answer.
所以,你可以做的是定义一个动态任务来执行你的复杂计算,比如
So, what you may do is to define a dynamic task performing your complex computation, like
val buildMaping: Def.Initialize[Task[Seq[Def.Initialize[(ProjectRef, Seq[Seq[File]])]]]] = {
Def.taskDyn {
val refs = loadedBuild.value.allProjectRefs
val tt = refs.map(_._1).map {
ref =>
sourceDirectories.all(ScopeFilter(inProjects(ref)))
.zipWith(Def.setting(ref)) { case (a, b) => b -> a }
}
Def.task {
tt
}
}
}
因此,此 buildMapping
允许您获取项目引用到其源目录的映射.
So, this buildMapping
allows you to get a map of project references to their source directories.
然后以这种方式调用您的任务:
then invoke your task this way:
Def.task {
val sd = settingsData.in(Global).value
val mapping = buildMaping.value.map(_.evaluate(sd)).toMap
val allProjectRefs = loadedBuild.value.allProjectRefs.map(_._1)
//... now you may iterate over each project,
// get deps and use the mapping to resolve your values
}
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