Bug Description: - [error] !! functions: Failed to load function definition from source: FirebaseError: Functions codebase could not be analyzed successfully. It may have a syntax or runtime error {"metadata":{"emulator":{"name":"functions"},"message":"Failed to load function definition from source: FirebaseError: Functions codebase could not be analyzed successfully. It may have a syntax or runtime error"}}.

[SupratimR9]

Note: Before filing bugs in this repo, please ensure that this is a bug for the Emulator Suite UI. Emulator Suite and/or Firebase CLI bugs should be filed under the firebase-tools repo here: https://github.com/firebase/firebase-tools/issues/new/choose

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior A clear and concise description of what you expected to happen.

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

[SupratimR9]

firebase-debug.log

[ongnxco]

My code also had the same error. After I commented out each section of code, I discovered that the error was caused by this line: const fetch = require('node-fetch'). Once I removed that line, the error disappeared.

[aalej]

Hi @SupratimR9, thanks for providing your debug logs. Based on the logs, functions are failing to load because of ReferenceError: functions is not defined, it may be possible that you’re trying to access a variable which has not been declared. To help us investigate what’s causing this issue, could you provide more details about this such as, but not limited to:

• Steps to reproduce the issue(e.g. how you set up your functions, and what commands you ran)
• Code snippets of the functions you’re trying to run on the emulator or an MCVE so that we can try to replicate the issue

Thanks!

[leo-paz]

I'm also seeing this when i import node-fetch but the line in the debug logs seems to be misleading

[debug] [2023-07-25T03:59:09.040Z] Got response code 400; body Failed to generate manifest from function source: Error: The default Firebase app already exists. This means you called initializeApp() more than once without providing an app name as the second argument. In most cases you only need to call initializeApp() once. But if you do want to initialize multiple apps, pass a second argument to initializeApp() to give each app a unique name.

Simply removing the code related to node-fetch fixes the issue but I don't think thats a valid solution.

[Zwiqler94]

This error message is really unhelpful. Just in case anyone is having a similar issue using secret manager with cloud functions:

Background: I'm running a cloud function 2nd gen for an expressjs app. Wanted to access some secrets as the app starts outside of an HTTP call.

In the debug log the issue is more specifically

...
Error: ... got response code 400; body failed to generate manifest from function source: error: cannot access the value of secret
...

The error happened because you can't use secrets in the code before runtime, luckily enabled secrets are injected as env vars which solved my issues.

So this [method]( https://firebase.google.com/docs/functions/config-env?gen=2nd#secret_parameters:~:text=Node.jsPython%20(preview)-,const%20%7B%20onRequest%20%7D%20%3D%20require(%22functions,%2F%2F%E2%80%A6,-Because%20the%20values ) of accessing a secret only works inside of a call to an endpoint. Which is not explained too well.

My solution is also not explained well, but every secret you've given a cloud function access to has an env var equivalent. Which kind of makes the about way of doing things a bit redundant.

[taeold]

Hi folks. As noted by several users commenting on this bug, the underlying root cause of the error message Failed to load function definition from source: FirebaseError: Functions codebase could not be analyzed successfully. It may have a syntax or runtime error is usually due to an programmatic error in the source code where the functions are defined.

For example, for node-fetch issue seen by @leo-paz @xuan may be due to the fact that node-fetch v3 is ESM-only, i.e. you cant require("node-fetch"). See https://github.com/node-fetch/node-fetch#installation

@Zwiqler94 seems to have gotten to the bottom of the issue by making sure that value of the secret param is only accessed inside the function handler.

I'm going to close the issue as stated to avoid this specific issue becoming a mega-thread that acts as a catch-all for any programmatic errors. Feel free to create a new issue if anyone is having an issue, and I'd encourage you to follow the issue template to attach any firebase-debug.log and hopefully a MVCE to help our team diagnose the issue more quickly.

[PradyumnaA]

I got the error "!! functions: Failed to load function definition from source: FirebaseError: Functions codebase could not be analyzed successfully. It may have a syntax or runtime error". till 31st of July it was working fine, now this error, can anyone provide a solution, thanks in advance

[PradyumnaA]

i got this error when i ran backend function in thunder Client/postman extension "Function us-central1-app does not exist, valid functions are:" i dont have any "us-central1-app" named function in my code get the following error in backend terminal : functions: Failed to load function definition from source: FirebaseError: Functions codebase could not be analyzed successfully. It may have a syntax or runtime error plz suggest the solution

did your error resolve? I am trying hard, it is not resolved, I even contacted developers. Please let me know if this error gets resolved

[alex-melnyk]

I got the same error while exporting a file with exports.functionName declaration, so fixed by defining this in the index.ts file only.

[peterpeterparker]

Here it's a bit ridiculous. Everything compiles fine in my brand new project if I declare the function in index.ts

export const myFunction = onRequest(
  {cors: true},
  async (req: Request, res: Response): Promise<void> => {
    res.status(200);
  },
);

However, if I extract the function to a utility, then it fails.

import {myUtil} from 'utils';

export const myFunctoin = onRequest(
  {cors: true},
  myUtil
);

// Utils
export const myUtil = async (
  req: Request,
  res: Response,
): Promise<void> => {
  res.status(200);
};

[TejasThombare20]

i got this error when i ran backend function in thunder Client/postman extension "Function us-central1-app does not exist, valid functions are:" i dont have any "us-central1-app" named function in my code get the following error in backend terminal : functions: Failed to load function definition from source: FirebaseError: Functions codebase could not be analyzed successfully. It may have a syntax or runtime error plz suggest the solution

did your error resolve? I am trying hard, it is not resolved, I even contacted developers. Please let me know if this error gets resolved

it was basic syntx error you should check your last code

[peterpeterparker]

I resolved my issue.

First I ran firebase deploy --debug to get more information about the issue:

[2023-08-12T06:24:26.201Z] Got response code 400; body Failed to generate manifest from function source: Error [ERR_MODULE_NOT_FOUND]: Cannot find module

Once I got the information, I knew it has to do with ESM and I resolved the issue by making the import explicit adding .js to my imports.

// Error
import {myUtil} from 'utils';

// Ok
import {myUtil} from 'utils.js';

[matija2209]

@peterpeterparker thanks. This can give some insights. I dropped the error log to ChatGPT to find the culprit. I converted the whole project to ES6 using TypeScript and naturally some import errors would occur.

[peterpeterparker]

Faced the error message again today, less than a week later than last time but, for a different reason.

Webstorm automatically imported:

import {getFirestore} from "firebase-admin/lib/firestore";

While the expected and correct import is:

import {getFirestore} from "firebase-admin/firestore";

Really an unpractical error msg. It would useful to replace it with "Please run firebase deploy --debug to figure out what's the issue".

[tylim88]

solution to my problem: https://stackoverflow.com/a/73720118/5338829

[fesmpydev]

I was encountering the same error message when trying to deploy my function. What I did was use the --debug flag when deploying. In my case, I had a syntax error when referencing the collection. Generally, it's due to a syntax error.

[mfb-remotesocial]

I am in this thread because, whilst it seems the issues being reported here are almost all syntax errors, I seem to recall the emulators used to provide much more verbose error reporting, indicating at least the corrupt file name, if not the actual line of the error. Since updating to a more recent version of Firebase and the newer emulators, these errors have been replaced with this extremely unhelpful generic line with no indication of where the error may be occurring. As people have suggested above, a current solution is to simply comment out entire files until you find the one that is causing the error. I don't recall ever having to do that previously.

[jake-stewart]

what a joke

[ntd278]

I wake up the next day and have this error with my functions deploy. My --debug show this: [2023-09-10T12:12:16.078Z] Got response code 400; body Failed to generate manifest from function source: TypeError: Cannot read properties of undefined (reading 'prototype'). Wondering if it is because I have update the firebase tools? This error is too vague can someone please help. Thanks.

[chinomnsoawazie]

Found this out by chance, after so much frustration: where you call initializeApp() matters!

Eg This 👇 will fail,

import {initializeApp} from "firebase-admin/app";
import {CallableRequest, HttpsError, onCall} from "firebase-functions/v2/https";
import {someFunction} from "./someFunctionPath";
import {APIRequestPayload} from "./typeDef";
import {someStuff, someStuff2, someStuff3} from "./constants";
initializeApp();

But this 👇 will not fail

import {initializeApp} from "firebase-admin/app";
initializeApp();
import {CallableRequest, HttpsError, onCall} from "firebase-functions/v2/https";
import {someFunction} from "./someFunctionPath";
import {APIRequestPayload} from "./typeDef";
import {someStuff, someStuff2, someStuff3} from "./constants";

I observed this behaviour happens especially when you import a function in index.ts (or index.js depending on what template you are using), and that imported function uses any firebase-admin module directly eg import {firestore} from "firebase-admin/firestore", or indirectly, eg importing another function in that function that uses any firebase-admin module.

To save myself some hassle, I always just call initializeApp() right after importing it like this 👇

import {initializeApp} from "firebase-admin/app";
initializeApp();

[mmkkkkzz]

@chinomnsoawazie 's finding resolves the error that happens to me as well. Thanks:)

[jasimchz]

In my case, the issue was I didn't have the .env file, I had .env.dev and .env.prod, just created .env and moved the content

[axelvalles]

@chinomnsoawazie omg, this works for me, I spent almost 2 days trying to deploy and this solved it, and I really don't understand why

[chinomnsoawazie]

@chinomnsoawazie 's finding resolves the error that happens to me as well. Thanks:)

You're welcome

[dothem1337]

For me it was the wrong import for defineString

Wrong: import {defineString} from "firebase-functions/lib/params";

Right import {defineString} from "firebase-functions/params";

[thinkininfinity]

I encountered this issue because I mistakenly exported other variables and functions in addition to 'onRequest' in Firebase Functions. I suspect that firebase-tools analyzes all the data exported by developers. So, if you're facing the same error, you can try removing those exports and see if it resolves the issue.

For example when I use it with trpc, it throws above error:

import { initTRPC } from "@trpc/server";
import { createHTTPHandler } from "@trpc/server/adapters/standalone";
import { onRequest } from "firebase-functions/v1/https";

const t = initTRPC.create();

// How to fix: don't export appRouter, just define it and use it
// if you want to export appRouter, I think you can use another file to do it instead of using src/index.ts file
export const appRouter = t.router({
  Hi: t.procedure.query(() => {
    return { data: "hi" };
  }),
});

export const v0 = onRequest(
  createHTTPHandler({
    router: appRouter,
    createContext: () => {
      return {};
    },
  }),
);

[NeatFastro]

For me it was using this enum's syntax

export enum DocStatus {
    draft = 'draft',
    saved = 'saved',
    archived = 'archived',
    deleted = 'deleted',
}

whenever I would use:

DocStatus.draft

The error would appear.

P.S don't ask me how I diagnosed it.

[McLeanAdam]

Had this issue, but I completely forgot to pull runtimeconfig down. its an obvs one but running firebase functions:config:get > .runtimeconfig.json

fixed my issue.

[dmr121]

I got rid of this error by moving const db = getFirestore(); from the top of the file to inside the function that I need it in.

[lwts]

Sorry but this is insane - the issue here isn't the invalid code (you can see with everyone's replies that something random is causing the error) but the way that the error is being displayed to us. In previous versions the console was super clear around what the issue was, now since updating it just gives a generic error message and it's on us to comment things out until we find what the issue is and still then we may find the line but not know the error. Turns a simple bug into a massive deep dive and is making development inefficient.

[mfb-remotesocial]

Sorry but this is insane - the issue here isn't the invalid code (you can see with everyone's replies that something random is causing the error) but the way that the error is being displayed to us. In previous versions the console was super clear around what the issue was, now since updating it just gives a generic error message and it's on us to comment things out until we find what the issue is and still then we may find the line but not know the error. Turns a simple bug into a massive deep dive and is making development inefficient.

Thank you... I commented as much above, but it was mostly skipped over. Updating firebase again last week seems to have returned the error reporting behaviour I was used to seeing from some months ago, which makes finding issues in your code much easier. Perhaps grab the most recent version of firebase-tools (or just firebase-functions).

[jnrdrgz]

Sorry but this is insane - the issue here isn't the invalid code (you can see with everyone's replies that something random is causing the error) but the way that the error is being displayed to us. In previous versions the console was super clear around what the issue was, now since updating it just gives a generic error message and it's on us to comment things out until we find what the issue is and still then we may find the line but not know the error. Turns a simple bug into a massive deep dive and is making development inefficient.

Thank you... I commented as much above, but it was mostly skipped over. Updating firebase again last week seems to have returned the error reporting behaviour I was used to seeing from some months ago, which makes finding issues in your code much easier. Perhaps grab the most recent version of firebase-tools (or just firebase-functions).

I updated firebase-functions and it give me a much clearer error log, thanks