@react-native-community/cli/build/tools/assign.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = assign;

/**
 * Source: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
 *
 * Similar to Object.assign(), but it doesn't execute getters. This allows us to have
 * lazy properties on an object and still be able to merge them together
 *
 */
function assign(target, ...sources) {
  sources.forEach(source => {
    let descriptors = Object.keys(source).reduce((acc, key) => {
      const propertyDescriptor = Object.getOwnPropertyDescriptor(source, key);

      if (propertyDescriptor !== undefined) {
        acc[key] = propertyDescriptor;
      }

      return acc;
    }, {}); // by default, Object.assign copies enumerable Symbols too

    Object.getOwnPropertySymbols(source).forEach(sym => {
      let descriptor = Object.getOwnPropertyDescriptor(source, sym);

      if (descriptor && descriptor.enumerable) {
        descriptors[sym.toString()] = descriptor;
      }
    });
    Object.defineProperties(target, descriptors);
  });
  return target;
}