enum UnsignError: Error {

case inputFileDoesNotExist(String)

}

let baseURL: URL

let manager = FileManager.default

init(xcode: Xcode) {

baseURL = xcode.url

}

private var binaryLocation: URL {

return URL(fileURLWithPath: "Contents/MacOS/Xcode", relativeTo: baseURL)

}

private var unsignedLocation: URL {

return URL(fileURLWithPath: "Contents/MacOS/Xcode.unsigned", relativeTo: baseURL)

}

func irreversiblyUnsign() throws {

try unsignExecutable(at: binaryLocation, to: unsignedLocation)

try manager.removeItem(at: binaryLocation)

try manager.moveItem(at: unsignedLocation, to: binaryLocation)

}

var isUnsigned: Bool {

let binaryPath = binaryLocation.path

let binaryArray = binaryPath.cString(using: .ascii)

let binaryPointer = UnsafeMutablePointer(mutating: binaryArray)

return is_unsigned(binaryPointer)

}

private func unsignExecutable(at originalLocation: URL, to unsignedLocation: URL) throws {

let inputPath = originalLocation.path

let outputPath = unsignedLocation.path

guard manager.fileExists(atPath: inputPath) else {

throw UnsignError.inputFileDoesNotExist(inputPath)

}

let inputArray = inputPath.cString(using: .ascii)

let outputArray = outputPath.cString(using: .ascii)

let inputPointer = UnsafeMutablePointer(mutating: inputArray)

let outputPointer = UnsafeMutablePointer(mutating: outputArray)

unsign(inputPointer, outputPointer)

}