metro.config.js

const path = require('path');
const pkg = require('../package.json');

const {getDefaultConfig, mergeConfig} = require('@react-native/metro-config');
const escape = require('escape-string-regexp');
const exclusionList = require('metro-config/src/defaults/exclusionList');

const peerDependencies = Object.keys(pkg.peerDependencies);
const root = path.resolve(__dirname, '..');
const projectNodeModules = path.join(__dirname, 'node_modules');
const rootNodeModules = path.join(root, 'node_modules');

// We need to make sure that only one version is loaded for peerDependencies
// So we block them at the root, and alias them to the versions in example's node_modules
const blacklistRE = exclusionList(
  peerDependencies.map((name) => new RegExp(`^${escape(path.join(rootNodeModules, name))}\\/.*$`)),
);

const extraNodeModules = peerDependencies.reduce((acc, name) => {
  acc[name] = path.join(projectNodeModules, name);
  return acc;
}, {});

/**
 * Metro configuration
 * https://reactnative.dev/docs/metro
 *
 * @type {import('metro-config').MetroConfig}
 */
const config = {
  projectRoot: __dirname,
  watchFolders: [root],
  resolver: {blacklistRE, extraNodeModules},
};

module.exports = mergeConfig(getDefaultConfig(__dirname), config);