为不同的 Scala 版本选择不同的源文件 [英] pick up different source file for different Scala version

问题描述

您好，我想知道使用 SBT 是否可以针对使用某些类的不同源代码的不同 Scala 版本进行交叉编译.基本上保持兼容性，但也要利用新的语言功能.谢谢.

Hi I would like to know if using SBT is possible to cross compiling against different Scala version using different sources for some classes. To keep back compatibility basically but leverage also on the new language features. Thanks.

推荐答案

您可以通过添加到 unmanagedSourceDirectories 设置.

类似这样的:

unmanagedSourceDirectories in Compile <+= (scalaVersion, sourceDirectory in Compile) {
  case (v, dir) if v startsWith "2.9" => dir / "scala_2.9"
  case (v, dir) if v startsWith "2.10" => dir / "scala_2.10"
}

应该允许你拥有三个目录:

Should allow you to have three directories:

src/main/scala      # both 2.9 and 2.10
src/main/scala_2.9  # source only for 2.9
src/main/scala_2.10 # source only for 2.10

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