Firebase: Cannot start emulator

Question

functions: Cannot start emulator. Error: Cannot find module '@google-cloud/functions-emulator/src/config'

This is the error message I get when I try to run functions locally on Mac. My Firebase version is 3.16.0. I tried doing sudo npm install -g @google-cloud/functions-emulator as well. But still no use. Please help.

Answer 1

Working Solution!(OSX) None of the above worked for me. After a long struggle, I found the following solution.

cd my_project/functions

npm install @google-cloud/functions-emulator

Copy @google-cloud/functions-emulator folder generated inside node_modules.

cd /usr/local/lib/node_modules/@google-cloud && open .

Paste the functions-emulator folder here.

In your project's root directory, copy package.json inside functions/node_modules/@google-cloud/functions-emulator

cd /usr/local/lib && open .

Paste the package.json here.

npm install

Hurray! You are good to go. Now go back to your project's root directory and run.

sudo firebase serve --only hosting,functions

And the emulator should start normally.

Note: Do not run sudo npm install -g @google-cloud/functions-emulator since the files will be removed and reinstalled. This is where the installation fails and emulator fails to run.

Hope this helps!

Answer 2

The following worked for me.

1. npm uninstall -g firebase-tools && npm i -g firebase-tools
2. npm i --save @google-cloud/firestore
3. npm i --save @google-cloud/common-grpc
4. npm i -g @google-cloud/functions-emulator
5. npm i --save firebase-functions

current package.json snippet

"dependencies": {
    "@google-cloud/common-grpc": "^0.5.3",
    "@google-cloud/firestore": "^0.11.1",
    "firebase-functions": "^0.8.1",
    "firebase-admin": "5.8.1" 
}