RunShellCommand.swift

#!/usr/bin/env swift

import Foundation

@discardableResult
func shell(_ args: String...) -> Int32 {
    let task = Process()
    task.launchPath = "/usr/bin/env"
    task.arguments = args
    task.launch()
    task.waitUntilExit()
    return task.terminationStatus
}

shell("ls")
shell("xcodebuild", "-workspace", "myApp.xcworkspace")

// taken here https://stackoverflow.com/questions/26971240/how-do-i-run-an-terminal-command-in-a-swift-script-e-g-xcodebuild