Function defineReplaceableLazyAttribute

lib/internal/util.js:631–672

(target, id, keys, writable = true, check)

}

function defineReplaceableLazyAttribute(target, id, keys, writable = true, check) {
  let mod;
  for (let i = 0; i < keys.length; i++) {
    const key = keys[i];
    let value;
    let setterCalled = false;

    function get() {
      if (check !== undefined) {
        FunctionPrototypeCall(check, this);
      }
      if (setterCalled) {
        return value;
      }
      mod ??= require(id);
      value ??= mod[key];
      return value;
    }

    ObjectDefineProperty(get, 'name', {
      __proto__: null,
      value: `get ${key}`,
    });

    function set(val) {
      setterCalled = true;
      value = val;
    }
    ObjectDefineProperty(set, 'name', {
      __proto__: null,
      value: `set ${key}`,
    });

    ObjectDefineProperty(target, key, {
      __proto__: null,
      enumerable: true,
      configurable: true,
      get,
      set: writable ? set : undefined,
    });
  }
}

function exposeLazyInterfaces(target, id, keys) {
  defineLazyProperties(target, id, keys, false);