metro.config.js

const path = require('path');

const exclusionList = require('metro-config/src/defaults/exclusionList');

const blockList = exclusionList([
  /node_modules\/.*\/node_modules\/react-native\/.*/,

  // This stops "react-native run-windows" from causing the metro server to
  // crash if its already running
  new RegExp(`${path.join(__dirname, 'windows').replace(/[/\\]+/g, '/')}.*`),

  // Workaround for `EPERM: operation not permitted, lstat '~\midl-MIDLRT-cl.read.1.tlog'`
  /.*\.tlog/,

  // Prevent Metro from watching temporary files generated by Visual Studio
  // otherwise it may crash when they are removed when closing a project.
  /.*\/.vs\/.*/,

  // Workaround for `EBUSY: resource busy or locked, open '~\msbuild.ProjectImports.zip'`
  /.*\.ProjectImports\.zip/,
]);

const config = {
  projectRoot: path.join(__dirname, 'example'),
  watchFolders: [__dirname],
  resolver: {
    blockList,
    // for some reason, since 0.73, metro does not see this
    extraNodeModules: {
      '@react-native-google-signin/google-signin': __dirname,
    },
  },
};

// Starting with react-native 0.72, we are required to provide a full config.
const { getDefaultConfig, mergeConfig } = require('@react-native/metro-config');
module.exports = mergeConfig(getDefaultConfig(__dirname), config);