build.sbt 中的条件库 [英] Conditional libraries in build.sbt

问题描述

使用 buildsbt.我正在尝试做这样的事情:

Using buildsbt. I'm trying to do something like this:

if (condition) {
  libraryDependencies += ... // library from maven
}
else {
  unmanagedJars in Compile += ... // local library instead
}

然而，build.sbt 根本不喜欢这个.我已经能够使用副作用来实现这一点，但这显然是不可取的.任何意见，将不胜感激.谢谢.

However, build.sbt doesn't like this at all. I've been able to accomplish this using side effects, but that's obviously undesirable. Any advice would be appreciated. Thanks.

推荐答案

您可以执行以下操作:

val additionalLibraryDependencies = Seq(...)
val additionalUnmanagedJars  = Seq(...)

libraryDependencies ++=(
  if (condition) {
    additionalLibraryDependencies
  }
)

unmanagedJars in Compile ++= (
  if (!condition) {
    additionalUnmanagedJars
  }
)

要从命令行设置条件，您应该添加以下几行:

To set the condition from command line you should add the following lines:

val someValueFromCommandLine = System.getProperty("key.of.the.value", "false")
if (someValueFromCommandLine.equals("true")){
    ...
}

你可以像 sbt -Dkey.of.the.value=true

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