metro.config.js

// Learn more https://docs.expo.io/guides/customizing-metro
const {getDefaultConfig} = require('expo/metro-config')
const cfg = getDefaultConfig(__dirname)

cfg.resolver.sourceExts = process.env.RN_SRC_EXT
  ? process.env.RN_SRC_EXT.split(',').concat(cfg.resolver.sourceExts)
  : cfg.resolver.sourceExts

if (cfg.resolver.resolveRequest) {
  throw Error('Update this override because it is conflicting now.')
}
cfg.resolver.resolveRequest = (context, moduleName, platform) => {
  // HACK: manually resolve a few packages that use `exports` in `package.json`.
  // A proper solution is to enable `unstable_enablePackageExports` but this needs careful testing.
  if (moduleName.startsWith('multiformats/hashes/hasher')) {
    return context.resolveRequest(
      context,
      'multiformats/dist/src/hashes/hasher',
      platform,
    )
  }
  if (moduleName.startsWith('multiformats/cid')) {
    return context.resolveRequest(
      context,
      'multiformats/dist/src/cid',
      platform,
    )
  }
  if (moduleName === '@ipld/dag-cbor') {
    return context.resolveRequest(context, '@ipld/dag-cbor/src', platform)
  }
  return context.resolveRequest(context, moduleName, platform)
}

cfg.transformer.getTransformOptions = async () => ({
  transform: {
    experimentalImportSupport: true,
    inlineRequires: true,
    nonInlinedRequires: [
      // We can remove this option and rely on the default after
      // https://github.com/facebook/metro/pull/1126 is released.
      'React',
      'react',
      'react/jsx-dev-runtime',
      'react/jsx-runtime',
      'react-native',
    ],
  },
})

module.exports = cfg