如何在 sbt-assembly jar 中包含测试依赖项？答案

【问题标题】：How to include test dependencies in sbt-assembly jar?如何在 sbt-assembly jar 中包含测试依赖项？
【发布时间】：2016-10-22 05:44:00
【问题描述】：

我无法将我的测试依赖项打包到我的测试程序集 jar 中。这是我build.sbt的摘录：

...

name := "project"

scalaVersion := "2.10.6"

assemblyOption in (Compile, assembly) := (assemblyOption in (Compile, assembly)).value.copy(includeScala = false)

fork in Test := true

parallelExecution in IntegrationTest := false

lazy val root = project.in(file(".")).configs(IntegrationTest.extend(Test)).settings(Defaults.itSettings: _ *)

Project.inConfig(Test)(baseAssemblySettings)

test in (Test, assembly) := {}

assemblyOption in (Test, assembly) := (assemblyOption in (Test, assembly)).value.copy(includeScala = false, includeDependency = true)

assemblyJarName in (Test, assembly) := s"${name.value}-test.jar"

fullClasspath in (Test, assembly) := {
  val cp = (fullClasspath in Test).value
  cp.filter{ file => (file.data.name contains "classes") || (file.data.name contains "test-classes")}  ++  (fullClasspath in Runtime).value
}

libraryDependencies ++= Seq(
  ...
  "com.typesafe.play" %% "play-json" % "2.3.10" % "test" excludeAll ExclusionRule(organization = "joda-time"),
  ...
)

...

当我使用 sbt test:assembly 组装我的 fat jar 时，会生成 fat jar project-test.jar，但 play-json 依赖项没有被打包：

$ jar tf /path/to/project-test.jar | grep play
$

但是，如果我从play-json dep（即"com.typesafe.play" %% "play-json" % "2.3.10" excludeAll ExclusionRule(organization = "joda-time")）中删除"test" 配置，我可以看到它被包含在内：

$ jar tf /path/to/project-test.jar | grep play
...
play/libs/Json.class
...
$

我是否做错了什么和/或遗漏了什么？我的目标是仅将play-json 库包含在test:assembly jar 中，而不是assembly jar 中

【问题讨论】：

标签： scala sbt sbt-assembly

【解决方案1】：

我在上面发布的原始build.sbt 摘录中遗漏了一个关键部分，结果证明这是问题的原因：

fullClasspath in (Test, assembly) := {
  val cp = (fullClasspath in Test).value
  cp.filter{ file => (file.data.name contains "classes") || (file.data.name contains "test-classes")}  ++  (fullClasspath in Runtime).value
}

此代码块实质上是从测试类路径中过滤掉了 deps。我们将其包括在内以避免痛苦的合并冲突。我通过添加逻辑以包含所需的play-json 部门来解决此问题：

fullClasspath in (Test, assembly) := {
  val cp = (fullClasspath in Test).value
  cp.filter{ file =>
    (file.data.name contains "classes") ||
    (file.data.name contains "test-classes") ||
    // sorta hacky
    (file.data.name contains "play")
  }  ++  (fullClasspath in Runtime).value
}

【讨论】：