firebase-functions: Module not found: Can't resolve 'child_process' in google-auth-library

I am using react next.js and getting the same error. If I don’t use firestore, I have to transfer my data to mongoDb.

@cmlbrnc @syedfaizan I had the exact same issue and I finally found out what the issue was by pasting my code into https://next-code-elimination.now.sh/. The issue was that my firebase-admin import wasn’t being eliminated by the client-side, leading to the code being run in the browser and causing this error. In my case, the import wasn’t eliminated because it was unused, so simply using it in getServersideProps fixed the error.

I had this problem too with NextJS. It was happening because child_process, a NodeJS API, was being invoked in the browser. You should only use admin in getStaticProps, getServerSideProps, or in an API route handler, i.e., in functions that only run on the server, where admin comes from import * as admin from 'firebase-admin';. If you only use admin in functions that run on the server, NextJS is smart enough to not include the firebase-admin dependency in the client bundle, ensuring that none of its NodeJS-specific code will be executed in the browser.

@cmlbrnc Coincidence much, Im using the same setup and stuck at the same spot, and if this doesnt work i have to go back to mongodb storage

@8q16d I had the same issue and just resolved thanks to your comment. There was import { ... } from 'firebase-admin' instead of 'firebase' (because I carelessly copied it from node.js project). Guys you’d better check for your imports 😉

@cmlbrnc I solved it updating the next package to “latest” and using env property in my next.config.js file. This way you can pass env variables into your Firebase project without the needed of functions config method.

https://nextjs.org/docs/api-reference/next.config.js/environment-variables

I dont use functions config method. I use ``import admin from “firebase-admin”;

try {
  admin.initializeApp({
    credential: admin.credential.cert({
      project_id: process.env.project_id,
      private_key: process.env.private_key,
      client_email: process.env.client_email,
    }),
    databaseURL: "https://....",
  });
} catch (error) {
  /*
   * We skip the "already exists" message which is
   * not an actual error when we're hot-reloading.
   */
  if (!/already exists/u.test(error.message)) {
    // eslint-disable-next-line no-console
    console.error("Firebase admin initialization error", error.stack);
  }

}

export default admin.firestore();

I’m getting this too, followed all the Firebase Docs and Firebase-Functions doc, still missing stuff. I comment out “firebase-functions” and “firebase-admin” and it builds just fine. So what gives with Webpack and Firebase-functions?

Update - these are server side packages - DO NOT ADD/IMPORT Them to client side and try to render with webpack, it will fail.

Hi, is this being called on the client? If you only require firebase-admin and it still fails then file a bug in https://github.com/firebase/firebase-admin-node/issues

import { FieldValue } from '@google-cloud/firestore';

Was the culprit for me.

Hey @francisrod01. We need more information to resolve this issue but there hasn’t been an update in 7 weekdays. I’m marking the issue as stale and if there are no new updates in the next 3 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!