main.yml

name: Deploy NestJS Backend to GAE

on:
  push:
    branches:
      - main
    paths:
      - 'server/**'
  pull_request:
    branches:
      - main
    paths:
      - 'server/**'

jobs:
  deploy:
    runs-on: ubuntu-latest
    defaults:
      run:
        working-directory: server

    steps:
      - name: 'Checkout code'
        uses: 'actions/checkout@v3'

      - name: 'Set up Node.js'
        uses: 'actions/setup-node@v4'
        with:
          node-version: 20

      - name: 'Install dependencies'
        run: 'npm ci'  # faster and reproducible builds

      - name: 'Build the project' # (compile TS to JS)
        run: 'npm run build'

      - id: 'auth'
        uses: 'google-github-actions/auth@v2'
        with:
          credentials_json: ${{ secrets.GCP_SA_KEY }}
  
      - id: 'deploy'
        uses: 'google-github-actions/deploy-appengine@v2'
        with:
          deliverables: 'server/app.yaml'
          project_id: ${{ secrets.GCP_PROJECT_ID }}
  
      # Example of using the output
      - id: 'test'
        run: 'curl "${{ steps.deploy.outputs.version_url }}"'