My Hammerspoon config

hammerspoon.init.lua

function shell(command)
  ok, result = hs.osascript.applescript(string.format('do shell script "%s"', command))
  return result
end

function sleep(n)
  os.execute('sleep ' .. tonumber(n))
end

-- https://github.com/smudge/nightlight
function nightlight(command)
  return shell('/usr/local/bin/nightlight ' .. command)
end

function rerunNightlight()
  if (string.match(nightlight('status'), 'on until')) then
    nightlight('off')
    sleep(0.2)
    nightlight('on')
  end
end

function caffeinateCallback(eventType)
  if (eventType == hs.caffeinate.watcher.screensDidUnlock) then
    rerunNightlight()
  end
end
  
caffeinateWatcher = hs.caffeinate.watcher.new(caffeinateCallback)
caffeinateWatcher:start()