setGroup throws: java.io.IOException: 'owner' parameter can't be a group

[fanf]

Hello, we are trying to use setOwner on a file, but we get ava.io.IOException: 'owner' parameter can't be a group.
It's on linux, with an existing group (else we get an other exception: java.nio.file.attribute.UserPrincipalNotFoundException).

Example reproduced case:

object Test {
  def main(args: Array[String]): Unit = {
    println("start")
    import better.files._
    val file = File("/tmp/plop")
    file.createFileIfNotExists()
    file.setGroup("the current user group for example")
    println("done")
  }
}

[fanf]

Sorry for the mixed between setOwner and setGroup

[pathikrit]

Your exception says owner parameter can't be a group but you are setting the group in your example e.g.

I don't see why that would work - that exception makes sense IMO. Do you have a working example using plain Java code that works that fails in better-files?

[fanf]

Well, I expected setGroup method to allow to set the file group... How I'm supposed to set it with better file?
Corresponding working Java code:

object Test2 {
  def main(args: Array[String]): Unit = {
    println("start")
    import better.files._
    val file = File("/tmp/plop")
    file.createFileIfNotExists()
    val group = java.nio.file.FileSystems.getDefault.getUserPrincipalLookupService.lookupPrincipalByGroupName("1000")
    java.nio.file.Files.getFileAttributeView(file.path, classOf[java.nio.file.attribute.PosixFileAttributeView], java.nio.file.LinkOption.NOFOLLOW_LINKS).setGroup(group)
    println("done")
  }
}

[pathikrit]

@fanf : Thanks for the clarification. I see what you mean. I think there is bug on this line then since I use setOwner: https://github.com/pathikrit/better-files/blob/master/core/src/main/scala/better/files/File.scala#L948