add Touch Bar support for CLI without .app bundle nor Info.plist

main.swift

class AppDelegate: NSResponder, NSTouchBarDelegate, NSApplicationDelegate {
    @available(OSX 10.12.2, *)
    lazy var touchbar: NSTouchBar = {
        let tb = NSTouchBar()
        tb.delegate = self
        tb.defaultItemIdentifiers = [NSTouchBarItemIdentifier(rawValue: "test")]
        return tb
    }()

    @available(OSX 10.12.2, *)
    override func makeTouchBar() -> NSTouchBar? {
        return touchbar
    }

    @available(OSX 10.12, *)
    lazy var touchbarLabel: NSTextField = NSTextField(labelWithString: "")

    @available(OSX 10.12.2, *)
    func touchBar(_ touchBar: NSTouchBar, makeItemForIdentifier identifier: NSTouchBarItemIdentifier) -> NSTouchBarItem? {
        let item = NSCustomTouchBarItem(identifier: identifier)
        item.view = touchbarLabel
        return item
    }
}

let appDelegate = AppDelegate()
let app = NSApplication.shared()
app.setActivationPolicy(.regular)
app.delegate = appDelegate
app.run()