Function mergeConfig

lib/utils.ts:53–69

(defaults: object, incoming: object)

 * @param incoming loaded config
 */
export const mergeConfig = (defaults: object, incoming: object) => {
  const overwrite: object = mapValues(defaults, (value, key) => {
    if (isPlainObject(value)) {
      return mergeConfig(value, get(incoming, key))
    }

    const incomingValue = get(incoming, key)

    return [isNumber, isArray, isString, isBoolean].some(
      (test) => test(value) !== test(incomingValue),
    )
      ? value
      : incomingValue
  })

  return isPlainObject(incoming) ? { ...incoming, ...overwrite } : overwrite
}