Hammerspoon change layout from Russian to English

keyboard.lua

ctrlPressed = false
keyPressed = false

layoutWatcher = hs.eventtap.new({hs.eventtap.event.types.flagsChanged, hs.eventtap.event.types.keyUp}, function(e)
    local flags = e:getFlags()
    local keyCode = e:getKeyCode()
    if flags.cmd and keyCode == 0x36 and not (flags.alt or flags.shift or flags.ctrl or flags.fn) then
        ctrlPressed = true
        keyPressed = false
    elseif ctrlPressed and not (flags.cmd or flags.alt or flags.shift or flags.ctrl or flags.fn) and not keyPressed then
        ctrlPressed = false
        if keyCode == 0x36 then
            local lay = hs.keycodes.currentLayout()
            if lay == "U.S." then
              hs.keycodes.setLayout("Russian")
            else
              hs.keycodes.setLayout("U.S.")
            end
        end
    else
        keyPressed = true
    end
end):start()