mutating func next()

in Sources/swift-format/Utilities/FileIterator.swift [52:79]

• 24 lines of code
• 6 McCabe index (conditional complexity)

  mutating func next() -> URL? {
    var output: URL? = nil
    while output == nil {
      // Check if we're recursing through a directory.
      if dirIterator != nil {
        output = nextInDirectory()
      } else {
        guard let next = urlIterator.next() else { return nil }
        var isDir: ObjCBool = false
        if FileManager.default.fileExists(atPath: next.path, isDirectory: &isDir), isDir.boolValue {
          dirIterator = FileManager.default.enumerator(at: next, includingPropertiesForKeys: nil)
          currentDirectory = next
        } else {
          // We'll get here if the path is a file, or if it doesn't exist. In the latter case,
          // return the path anyway; we'll turn the error we get when we try to open the file into
          // an appropriate diagnostic instead of trying to handle it here.
          output = next
        }
      }
      if let out = output, visited.contains(out.absoluteURL.standardized.path) {
        output = nil
      }
    }
    if let out = output {
      visited.insert(out.absoluteURL.standardized.path)
    }
    return output
  }