[EASY!] firebase emulator:start (in debug mode)

Before we could debug firebase functions in a local machine by running emulator and attaching a debugger using (@google-cloud/functions-emulator) more info at https://cloud.google.com/functions/docs/emulator

For example Debugging with the Node.js Emulator. You can debug your functions running in the Node.js Emulator using either the standard Node.js Debugger or the V8 Inspector integration. To debug using the standard Node.js Debugger, run the following command:

functions debug helloWorld

since The Cloud Functions Emulator has been deprecated

Now I use firebase emulators:start --only functions (more info https://firebase.google.com/docs/functions/local-emulator)

I can run my functions locally but can not attach debugger like I used to do. And seems there are no docs on how to attach debugger for functions served by command “firebase emulators:start”

My question how we can attach a debugger to set breakpoints like here https://github.com/googlearchive/cloud-functions-emulator/wiki/Debugging-with-Visual-Studio-Code For example firebase --debug emulators:start --only functions
and in my vscode attach to port/process and set breakpoints

Please submit feature requests through our support page.

[sultanmyrza]

Solved: on how to debug firebase functions in emulator (without any dependencies like @google-cloud/functions-emulator)

✅ no need for external libs (@google-cloud/functions-emulator) pure firebase functions ✅. hot reload no code change

1. init firebase project firebase init
2. add npm script in package.json "debug": "tsc -w | firebase emulators:start --inspect-functions",
3. run npm run debug
4. press F1 in vscode select Debug: Attach to Node Process
5. it will prompt running processes select process usually its first one

here are screenshot steps https://imgur.com/a/LUSW8NF

[vongohren]

@samtstern question, the known issue you are pointing to is not very releated. This issue demands some documentation on how to acctually do the debugging, because now since firebase emulators is the go to runner of a functions setup with emulators, there should be some way to run an attached process to the running node code.

The attached issue points to some issue after it seems he has gotten it to work.

But why is it not a clear way to just open a debugger inspect port?