local package = require "package"

function reload(module)
  if package.loaded[module] == nil then
    -- initial load
    return require(module)
  else
    -- reload
    local oldmod = package.loaded[module]
    package.loaded[module] = nil
    local ok, obj = pcall(require, module)
    if ok then
      return obj
    else
      package.loaded[module] = oldmod
      return oldmod
    end
  end
end