Add a recursive sbt.IO.listFiles

As of SBT 0.13.7, there doesn’t appear to be a way to recursively list files in a directory using the provided sbt.IO.listFiles helper functions. Essentially I want an sbt.IO.listFiles that lists all files within a given directory, and optionally all of its subdirectories.

http://www.scala-sbt.org/0.13.7/api/index.html#sbt.IO$

When needed, I end up doing something like this peppered around several build definitions:

def listFilesRecursively(dir: File): Seq[File] = {
  val list = sbt.IO.listFiles(dir)
  list.filter(_.isFile) ++ list.filter(_.isDirectory).flatMap(listFilesRecursively)
}

It would be great if SBT could fold this into sbt.IO — either by creating a new function named listFilesRecursively, or add an optional recursive:Boolean = false argument to the existing sbt.IO.listFiles functions which one could set to true to make them recursive as needed.

[reactormonk]

Just in case anyone comes across this, Path.allSubpaths

[eed3si9n]

sbt also has Paths, which is pretty versatile. What you’re after could be written as:

scala> import sbt._, Path._
import sbt._
import Path._

scala> val base = new java.io.File(".")
base: java.io.File = .

scala> ((base ** "*") filter { !_.isDirectory }).get
res0: Seq[java.io.File] = ArrayBuffer(./.gitattributes,...

or more concisely as:

scala> (base ** (-DirectoryFilter)).get
res1: Seq[java.io.File] = ArrayBuffer(./.gitattributes,...