deploy-app.yml

name: deploy app

on:
  push:
    branches: [main]


env:
  AWS_REGION: eu-west-2

jobs:
  deploy:
    runs-on: ubuntu-latest
    permissions:
      id-token: write
      contents: read

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Configure AWS credentials
        uses: aws-actions/configure-aws-credentials@v4
        with:
          role-to-assume: ${{ secrets.AWS_ROLE_ARN }}
          aws-region: eu-west-2

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'
          cache-dependency-path: 'src/handler/package.json'

      - name: Install dependencies
        working-directory: "./src/handler"
        run: npm ci --production


      - name: Package Lambda function
        run: |
          cd src/handler
          zip -r ../../deployment.zip .

      - name: Get artifacts bucket name
        id: bucket
        run: |
          BUCKET=$(aws s3api list-buckets \
            --query "Buckets[?starts_with(Name, 'node-api-dev-lambda-artifacts')].Name" \
            --output text)
          echo "name=${BUCKET}" >> $GITHUB_OUTPUT
          echo "Using bucket: ${BUCKET}"

      - name: Upload to S3
        run: |
          aws s3 cp deployment.zip \
            s3://${{ steps.bucket.outputs.name }}/deployment.zip \
            --metadata "git-commit=${{ github.sha }},git-branch=${{ github.ref_name }},deployed-by=github-actions"

          echo "Uploaded deployment package to S3"

      - name: Update Lambda function code
        id: update-lambda
        run: |
          FUNCTION_NAME="node-api-dev-api"

          echo "Updating Lambda function: ${FUNCTION_NAME}"

          aws lambda update-function-code \
            --function-name ${FUNCTION_NAME} \
            --s3-bucket ${{ steps.bucket.outputs.name }} \
            --s3-key deployment.zip \
            --publish

          echo "Waiting for function update to complete..."
          aws lambda wait function-updated \
            --function-name ${FUNCTION_NAME}

          VERSION=$(aws lambda get-function \
            --function-name ${FUNCTION_NAME} \
            --query 'Configuration.Version' \
            --output text)

          echo "version=${VERSION}" >> $GITHUB_OUTPUT
          echo "Lambda updated to version: ${VERSION}"

      - name: Get API endpoint
        id: api
        run: |
          API_ID=$(aws apigatewayv2 get-apis \
            --query "Items[?Name==\`node-api-dev-api\`].ApiId" \
            --output text)

          if [ -z "$API_ID" ] || [ "$API_ID" == "None" ]; then
            echo "ERROR: API 'node-api-dev-api' not found."
            exit 1
          fi

          ENDPOINT=$(aws apigatewayv2 get-api \
            --api-id "$API_ID" \
            --query 'ApiEndpoint' \
            --output text)

          echo "endpoint=${ENDPOINT}" >> $GITHUB_OUTPUT
          echo "API endpoint: $ENDPOINT"