Hammerspoon script so that ctrl acts as esc if it's pressed by itself

init.lua

--- ==========================================
--- Reload this config if it changes
--- ==========================================

function reloadConfig(files)
   doReload = false
   for _,file in pairs(files) do
      if file:sub(-4) == ".lua" then
         doReload = true
      end
   end

   if doReload then
      result, success = hs.execute("luac -p ~/.hammerspoon/init.lua 2>&1 >/dev/null", true)
      if not success then
         hs.alert(result)
         return
      end

      hs.reload()
   end
end

hs_config_watcher = hs.pathwatcher.new(os.getenv("HOME") .. "/.hammerspoon/", reloadConfig):start()
hs.alert.show("Config loaded.")

g_mod_keys = true

-- ==========================================
-- ESC
-- ==========================================
send_escape = false
last_mods = {}

control_key_handler = function()
   send_escape = false
end

control_key_timer = hs.timer.delayed.new(0.15, control_key_handler)

control_handler = function(evt)
   if not g_mod_keys then
      return
   end

   local new_mods = evt:getFlags()
   if last_mods["ctrl"] == new_mods["ctrl"] then
      return false
   end
   if not last_mods["ctrl"] then
      last_mods = new_mods
      send_escape = true
      control_key_timer:start()
   else
      if send_escape then
         if not g_hs_mode then
            hs.eventtap.event.newKeyEvent({}, 'escape', true):post()
            hs.eventtap.event.newKeyEvent({}, 'escape', false):post()
         end
      end
      last_mods = new_mods
      control_key_timer:stop()
   end
   return false
end

control_tap = hs.eventtap.new({hs.eventtap.event.types.flagsChanged}, control_handler)
control_tap:start()

other_handler = function(evt)
   send_escape = false
   return false
end

other_tap = hs.eventtap.new({hs.eventtap.event.types.keyDown}, other_handler)
other_tap:start()