SBT - 有没有办法忽略 copyResources 中的重复映射?

问题描述

限时删除！！

我正在尝试使用 SBT 和 sbt-assembly 生成一个胖 jar.作为一项要求，我需要在 jar 中添加其他非托管资源(目录).问题是 2 个目录上的文件具有相同的文件名和路径.因此，运行 assembly 会导致 copyResources 错误 - 重复映射错误.我想要的行为是如果文件已经存在，则丢弃另一个文件.有没有办法做到这一点?这行得通吗?

I am trying to generate a fat jar using SBT and sbt-assembly. As a requirement, there are other unmanaged resources (directories) that I need to add in the jar. The problem is there are files on 2 directories that have the same file name and path. So running assembly results to a copyResources error - a Duplicate Mappings error. The behaviour that I want is if the file is already existing, discard the other file. Is there a way to do this? Will this work?

unmanagedResources in Compile ~= (_.distinct)

有解决办法吗?有没有更好的解决方案?

Is it a solution? Is there a better solution?

推荐答案

也许是程序集插件的 合并策略设置对您来说已经足够了.试试这个:

Maybe the assembly plugin's merge strategy settings are sufficient for you. Try this:

mergeStrategy in assembly <<= (mergeStrategy in assembly) { (old) => {
  case PathList("path", "to", "file", xs @ _*) =>
    (xs map {_.toLowerCase}) match {
      case ("myduplicatefile" :: Nil) => MergeStrategy.first
      case _ => MergeStrategy.deduplicate
    }
  case x => old(x)
}

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