metro.config.js

const path = require("path");

const escape = require("escape-string-regexp");
const blacklist = require("metro-config/src/defaults/exclusionList");

const pak = require("../package.json");

const root = path.resolve(__dirname, "..");

const modules = Object.keys({
  ...pak.peerDependencies,
});

module.exports = {
  projectRoot: __dirname,
  watchFolders: [root],

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

    extraNodeModules: modules.reduce((acc, name) => {
      acc[name] = path.join(__dirname, "node_modules", name);
      return acc;
    }, {}),
  },

  transformer: {
    getTransformOptions: async () => ({
      transform: {
        experimentalImportSupport: false,
        inlineRequires: true,
      },
    }),
  },
};