node/tools/node_modules/@babel/eslint-parser/lib/configuration.cjs

const _excluded = ["babelOptions", "ecmaVersion", "sourceType", "allowImportExportEverywhere", "requireConfigFile"];

function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }

exports.normalizeESLintConfig = function (options) {
  const {
    babelOptions = {},
    ecmaVersion = 2020,
    sourceType = "module",
    allowImportExportEverywhere = false,
    requireConfigFile = true
  } = options,
        otherOptions = _objectWithoutPropertiesLoose(options, _excluded);

  return Object.assign({
    babelOptions: Object.assign({
      cwd: process.cwd()
    }, babelOptions),
    ecmaVersion: ecmaVersion === "latest" ? 1e8 : ecmaVersion,
    sourceType,
    allowImportExportEverywhere,
    requireConfigFile
  }, otherOptions);
};