swift-scrip-part1.swift

// MARK:- Scripting
func shell(launchPath: String, arguments: [String]) -> String
{
  let task = Process()
  task.launchPath = launchPath
  task.arguments = arguments
  
  let pipe = Pipe()
  task.standardOutput = pipe
  task.launch()
  
  let data = pipe.fileHandleForReading.readDataToEndOfFile()
  let output = String(data: data, encoding: String.Encoding.utf8)!
  if output.count > 0 {
    let lastIndex = output.index(before: output.endIndex)
    return String(output[output.startIndex ..< lastIndex])
  }
  return output
}

@discardableResult
func bash(command: String, arguments: [String]) -> String {
  let whichPathForCommand = shell(launchPath: "/bin/bash", arguments: [ "-l", "-c", "which \(command)" ])
  return shell(launchPath: whichPathForCommand, arguments: arguments)
}