How to conditionally schedule a Firebase pubsub function depending on the Firebase account

firebase-functions.js

const productionFirebaseAccount = 'production-firebase-account';

if (process.env.GCLOUD_PROJECT === productionFirebaseAccount) {
  exports.generateInvoices = functions.pubsub
    .schedule('0 15 * * 5') // every Friday at 3pm PST
    .timeZone('America/Vancouver')
    .onRun(async context => {
    const generateInvoices = require('./reports/generateInvoices');
    await generateInvoices();
  });
}

Our scenario, is basically if we have a production and development Firebase account, I only want the scheduled functions (pubsubs) for running say reports, to run on the production account so the team doesn't get doubled-up invoices.

So the above code setup ensures only the production Firebase account gets the pubsubs deployed to it, by conditionally exporting the pubsub depending on the Firebase project/account by referencing the GCLOUD_PROJECT reserved environment variable.