Fix serve command

[jonjamz]

From the Firebase docs, you must use --only in order to run the local function emulator.
See https://firebase.google.com/docs/functions/local-emulator

[timneutkens]

@jthegedus

[jthegedus]

@jonjamz Your fork is out of date. I've written comments about this not working and linked to relevant issues in the README - see current canary https://github.com/zeit/next.js/tree/canary/examples/with-firebase-hosting#run-firebase-locally-for-testing

I'll look at this again now and see if anything has changed.

[jthegedus]

Wow, the local function emulation actually works now! Cheers @jonjamz for bringing this to my attention 😄

Interestingly it still checks online to see if a Firebase project with that name exists within your account, but it certainly runs local functions with hosting rewrites. And it runs without having to have the Functions already deployed 💯 I may have spoke too soon. This does work, but may require a previous deployment.

@jonjamz Once you update to the latest canary the changes that need to occur are:

// package.json
+ "preserve": "npm run build-all",
- "serve": "echo \"for details see:\n\thttps://github.com/firebase/firebase-tools/issues/535 \n\thttps://github.com/zeit/next.js/issues/3167\";",
+ "serve": "NODE_ENV=production firebase serve --only functions,hosting",
+ "build-all": "npm run build-public && npm run build-funcs && npm run build-app && npm run copy-deps && npm run install-deps",

This would also close this #3167

[jonjamz]

Ha! I actually just did exactly what you did and came back here to write about it but you already had it figured out 😄. Glad it's all working!

[jthegedus]

@jonjamz You're still going to need to perform the update to the PR yourself, I don't have write access to your repo.

It is exciting though as this significantly reduces the turn around time from writing to testing.

You should also update the README.md as so

- Unfortunately I have been unable to get any combination of

- firebase serve --only functions,hosting
+ npm run serve

- to locally host the built Next.js app as expected. [This issue is where solutions are being explored](https://github.com/firebase/firebase-tools/issues/535) and they will be shared here and on the [Next.js repo's similar issue](https://github.com/zeit/next.js/issues/3167) when discovered.

[timneutkens]

Fixed the suggestions you mentioned @jthegedus