如何在Swift中从app启动命令行工具？

import Foundation

func runCommand(cmd: String, args: [String]) -> String {
    let task = Process()
    task.launchPath = cmd
    task.arguments = args
    
    let pipe = Pipe()
    task.standardOutput = pipe
    task.launch()
    
    let data = pipe.fileHandleForReading.readDataToEndOfFile()
    let output = String(data: data, encoding: .utf8)!
    
    return output
}

let command = "/usr/bin/env"
let arguments = ["ls", "-l"]

let result = runCommand(cmd: command, args: arguments)
print(result)