Generate lua functions from lua environment

gen_lua_functions.lua

local function get_args(fun)
  local args = {}
  local hook = debug.gethook()
  local argHook = function( ... )
    local info = debug.getinfo(3)
    if 'pcall' ~= info.name then return end
    for i=1,100 do
      local name, value = debug.getlocal(2, i)
      if name == nil or name:match('%(') then
        break
      end
      table.insert(args,name)
    end
    debug.sethook(hook)
    error('')
  end

  debug.sethook(argHook, "c")
  pcall(fun)
  return args
end

function generate()
  local functions = {}
  local parsed = {}
  local function trace(t, prefix)
    if parsed[t] then return end
    parsed[t] = true
    for name,v in pairs(t) do
      if type(name) == 'string' then
        if type(v) == 'function' then
          local info = debug.getinfo(v)
          local args = get_args(v)
          local fname = string.format('%s%s(%s)', prefix, name, table.concat(args, ','))
          table.insert(functions, fname)
        elseif type(v) == 'table' then
          trace(v, prefix .. name .. '.')
        end
      end
    end
  end
  trace(_G, '')
  table.sort(functions)
  return functions
end

local functions = generate()
for i,name in ipairs(functions) do
  print(name)
end