FileHandleTextOutput

FileHandleTextOutput.swift

final public class FileHandleTextOutput: TextOutputStream {
  /// File path
  let path: String

  private let fileHandle: FileHandle

  public init?(path: String, append: Bool = false) {
    let expandedPath = (path as NSString).expandingTildeInPath
    guard let file = FileHandle(forWritingAtPath: expandedPath) else { return nil }
    fileHandle = file
    if append {
      fileHandle.seekToEndOfFile()
    }
    self.path = expandedPath
  }

  public func write(_ string: String) {
    fileHandle.write(string.data(using: .utf8)!)
  }

  deinit {
    fileHandle.closeFile()
  }

}


let testSream = FileHandleTextOutput(path: "/tmp/demo.txt", append: true)
testSream?.write("Hello world.")