shell.swift

public func shell(tool toolPath: String, arguments: [String]) -> String {
    let process = Process()
    process.launchPath = toolPath
    process.arguments = arguments

    let output = Pipe()
    process.standardOutput = output
    process.launch()
    process.waitUntilExit()

    return String(
        data: output.fileHandleForReading.readDataToEndOfFile(),
        encoding: .utf8)!
}