Globbing

No need to port this to Scala:

val dir = "src"/"test"
val matches: Iterator[File] = dir.glob("**/*.{java,scala}")
// above code is equivalent to:
dir.listRecursively().filter(f => f.extension == Some(".java") || f.extension == Some(".scala"))

You can even use more advanced regex syntax instead of glob syntax:

val matches = dir.globRegex("^\\w*$".r) //equivalent to dir.glob("^\\w*$")(syntax = File.PathMatcherSyntax.regex)

By default, glob syntax in better-files is different from the default JDK glob behaviour since it always includes path. To use the default behaviour:

dir.glob("**/*.txt", includePath = false) // JDK default
//OR
dir.glob("*.txt", includePath = true) // better-files default

You can also extend the File.PathMatcherSyntax to create your own matchers.

For custom cases:

dir.collectChildren(_.isSymbolicLink) // collect all symlinks in a directory

For simpler cases, you can always use dir.list or dir.walk(maxDepth: Int)