config.js

'use strict';

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

var _assign = require('babel-runtime/core-js/object/assign');

var _assign2 = _interopRequireDefault(_assign);

var _typeof2 = require('babel-runtime/helpers/typeof');

var _typeof3 = _interopRequireDefault(_typeof2);

var _map = require('babel-runtime/core-js/map');

var _map2 = _interopRequireDefault(_map);

exports.default = getConfig;

var _findUp = require('find-up');

var _findUp2 = _interopRequireDefault(_findUp);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var cache = new _map2.default();

var defaultConfig = {
  webpack: null,
  webpackDevMiddleware: null,
  distDir: '.next',
  assetPrefix: '',
  configOrigin: 'default',
  useFileSystemPublicRoutes: true
};

function getConfig(dir, customConfig) {
  if (!cache.has(dir)) {
    cache.set(dir, loadConfig(dir, customConfig));
  }
  return cache.get(dir);
}

function loadConfig(dir, customConfig) {
  if (customConfig && (typeof customConfig === 'undefined' ? 'undefined' : (0, _typeof3.default)(customConfig)) === 'object') {
    customConfig.configOrigin = 'server';
    return withDefaults(customConfig);
  }
  var path = _findUp2.default.sync('next.config.js', {
    cwd: dir
  });

  var userConfig = {};

  if (path && path.length) {
    var userConfigModule = require(path);
    userConfig = userConfigModule.default || userConfigModule;
    if (userConfig.poweredByHeader === true || userConfig.poweredByHeader === false) {
      console.warn('> the `poweredByHeader` option has been removed https://err.sh/zeit/next.js/powered-by-header-option-removed');
    }
    userConfig.configOrigin = 'next.config.js';
  }

  return withDefaults(userConfig);
}

function withDefaults(config) {
  return (0, _assign2.default)({}, defaultConfig, config);
}