gcp_backend.yml

name: Deploy Backend to Cloud RUN

on:
#  push:
#    branches: [ "main" ]
#    paths:
#      - 'backend/**'
  workflow_dispatch:
    inputs:
      environment:
        description: 'Select the environment to deploy to'
        required: true
        default: 'development'
      branch:
        description: 'Branch to deploy from'
        required: true
        default: 'main'

env:
  SERVICE: backend
  REGION: us-central1

jobs:
  deploy:
    environment: ${{ github.event.inputs.environment }}
    permissions:
      contents: 'read'
      id-token: 'write'

    runs-on: ubuntu-latest
    steps:
      - name: Validate Environment Input
        run: |
          if [[ "${{ github.event.inputs.environment }}" != "development" && "${{ github.event.inputs.environment }}" != "prod" ]]; then
            echo "Invalid environment: ${{ github.event.inputs.environment }}. Must be 'development' or 'prod'."
            exit 1
          fi

      # To workaround "no space left on device" issue of GitHub-hosted runner
      - name: Delete huge unnecessary tools folder
        run: rm -rf /opt/hostedtoolcache

      - name: Checkout
        uses: actions/checkout@v4

      - name: Google Auth
        id: auth
        uses: 'google-github-actions/auth@v2'
        with:
          credentials_json: ${{ secrets.GCP_CREDENTIALS }}

      - name: Login to GCR
        run: gcloud auth configure-docker

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Google Service Account
        run: echo "${{ secrets.GCP_SERVICE_ACCOUNT }}" | base64 -d > ./backend/google-credentials.json

      - name: Build and Push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./backend/Dockerfile
          push: true
          tags: gcr.io/${{ vars.GCP_PROJECT_ID }}/${{ env.SERVICE }}:latest
          cache-from: type=registry,ref=gcr.io/${{ vars.GCP_PROJECT_ID }}/${{ env.SERVICE }}:buildcache
          cache-to: type=registry,ref=gcr.io/${{ vars.GCP_PROJECT_ID }}/${{ env.SERVICE }}:buildcache,mode=max

      - name: Deploy to Cloud Run
        id: deploy
        uses: google-github-actions/deploy-cloudrun@v2
        with:
          service: ${{ env.SERVICE }}
          region: ${{ env.REGION }}
          image: gcr.io/${{ vars.GCP_PROJECT_ID }}/${{ env.SERVICE }}

      # If required, use the Cloud Run url output in later steps
      - name: Show Output
        run: echo ${{ steps.deploy.outputs.url }}