How to fix Cloud Functions: HTTP 429 - Quota exceeded when deploying functions in Firebase

# Wait before retrying
sleep 120
firebase deploy --only functions

# Deploy specific function groups
firebase deploy --only functions:userAuth,functions:dataProcessor,functions:emailSender

# Or deploy individual functions
firebase deploy --only functions:sendWelcomeEmail
firebase deploy --only functions:processPayment

// deploy-functions.js
const { execSync } = require('child_process');
const fs = require('fs');

// Get all function names from firebase.json or functions/index.ts
const functionNames = [
  'userAuth',
  'dataProcessor',
  'emailSender',
  'webhookHandler',
  // ... add all your functions
];

const BATCH_SIZE = 10;
const DELAY_MS = 5000; // 5 second delay between batches

async function sleep(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

async function deployInBatches() {
  for (let i = 0; i < functionNames.length; i += BATCH_SIZE) {
    const batch = functionNames.slice(i, i + BATCH_SIZE);
    const functionList = batch.map(name => `functions:${name}`).join(',');

    console.log(`Deploying batch ${Math.floor(i / BATCH_SIZE) + 1}: ${batch.join(', ')}`);

    try {
      execSync(`firebase deploy --only ${functionList}`, { stdio: 'inherit' });
      console.log('Batch deployed successfully');
    } catch (error) {
      console.error('Batch deployment failed:', error.message);
      process.exit(1);
    }

    if (i + BATCH_SIZE < functionNames.length) {
      console.log(`Waiting ${DELAY_MS / 1000} seconds before next batch...`);
      await sleep(DELAY_MS);
    }
  }
}

deployInBatches();

# .github/workflows/deploy.yml
name: Deploy Firebase Functions

on:
  push:
    branches: [main]

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: 18

      - name: Install dependencies
        run: npm ci

      - name: Deploy batch 1
        run: firebase deploy --only functions:batch1FuncA,functions:batch1FuncB
        env:
          FIREBASE_TOKEN: ${{ secrets.FIREBASE_TOKEN }}

      - name: Wait
        run: sleep 10

      - name: Deploy batch 2
        run: firebase deploy --only functions:batch2FuncA,functions:batch2FuncB
        env:
          FIREBASE_TOKEN: ${{ secrets.FIREBASE_TOKEN }}

# .gitlab-ci.yml
deploy:
  stage: deploy
  script:
    - firebase deploy --only functions:groupA
    - sleep 10
    - firebase deploy --only functions:groupB
    - sleep 10
    - firebase deploy --only functions:groupC
  only:
    - main

# Deploy only the function you modified
firebase deploy --only functions:myNewFunction

# Or use function groups defined in firebase.json
firebase deploy --only functions:auth