Firebase configuration for multiple projects/environments

Question

I'm using Cloud Functions for Firebase with three different projects for development, testing and production purposes. Each project has a service-account.json. When I deploy the sources to an environment, the initialization looks like this:

var serviceAccount = require("./service-account-dev.json");  firebase.initializeApp({     credential: firebase.credential.cert(serviceAccount),     databaseURL: "https://nwDEV.firebaseio.com" }); 

This is a bit difficult to handle, because I have to change the code everytime I want to deploy to a different environment. Is there a way to have an overall configuration, e.g. in firebase.json or.firebasesrc, which allows to integrate the service-account and decides on deployment which configuration to choose?

Otherwise is there a possibility to detect under which environment the code is running and to load the specific service-account.json and to set the databaseURL-property?

Answer 1

You can use environment variables. https://firebase.google.com/docs/functions/config-env

1. Select the project (you can use the command firebase projects:list to see them): firebase use my-project-development

2. Set an environment variable firebase functions:config:set app.environment="dev"

3. In your functions file, apply a conditional to choose the file: const serviceAccount = functions.config().app.environment === 'dev' ? 'credentials-dev.json' : 'credentials-prod.json';

Then you can use the file depending on the project:

firebase.initializeApp({     credential: firebase.credential.cert(serviceAccount),     databaseURL: "https://nwDEV.firebaseio.com" });