lambda-deploy.yml

name: Lambda Deploy

on:
  push:
    branches: [main]
    paths:
      - 'apps/backend/lambdas/**'

jobs:
  detect-changes:
    runs-on: ubuntu-latest
    outputs:
      lambdas: ${{ steps.detect.outputs.lambdas }}
      has-changes: ${{ steps.detect.outputs.has-changes }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Detect changed lambdas
        id: detect
        run: |
          BASE_COMMIT="${{ github.event.before }}"

          all_lambdas=$(ls -d apps/backend/lambdas/*/ | grep -Ev "(tools)/" | sed 's#/$##' | jq -R -s -c 'split("\n") | map(select(. != ""))')
          
          changed_files=$(git diff --name-only HEAD~1 HEAD 2>/dev/null || git diff --name-only HEAD)
          
          changed_lambdas=()
          for lambda_path in apps/backend/lambdas/*/; do
            lambda_name=$(basename "$lambda_path")
            if [[ "$lambda_name" != "tools" ]]; then
              if echo "$changed_files" | grep -q "^apps/backend/lambdas/$lambda_name/"; then
                changed_lambdas+=("$lambda_path")
              fi
            fi
          done
          
          if [[ ${#changed_lambdas[@]} -eq 0 ]]; then
            echo "No specific lambda changes detected, deploying all lambdas"
            lambdas=$all_lambdas
            has_changes="true"
          else
            lambdas=$(printf '%s\n' "${changed_lambdas[@]}" | sed 's#/$##' | jq -R -s -c 'split("\n") | map(select(. != ""))')
            has_changes="true"
          fi
          
          echo "lambdas=$lambdas" >> $GITHUB_OUTPUT
          echo "has-changes=$has_changes" >> $GITHUB_OUTPUT

  build:
    needs: detect-changes
    if: needs.detect-changes.outputs.has-changes == 'true'
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        lambda: ${{ fromJson(needs.detect-changes.outputs.lambdas) }}
    steps:
      - uses: actions/checkout@v4
      
      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'
      
      - name: Install dependencies
        working-directory: ${{ matrix.lambda }}
        run: npm ci --legacy-peer-deps
      
      - name: Package lambda
        working-directory: ${{ matrix.lambda }}
        run: npm run package
      
      - name: Upload lambda artifact
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.lambda }}
          path: ${{ matrix.lambda }}/lambda.zip
          if-no-files-found: error

  deploy:
    needs: [detect-changes, build]
    if: needs.detect-changes.outputs.has-changes == 'true'
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        lambda: ${{ fromJson(needs.detect-changes.outputs.lambdas) }}
    env:
      AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
      AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
      AWS_REGION: us-east-2
    steps:
      - name: Download lambda artifact
        uses: actions/download-artifact@v4
        with:
          name: ${{ matrix.lambda }}
          path: ${{ matrix.lambda }}
      
      - name: Deploy lambda
        run: |
          LAMBDA_NAME=$(basename ${{ matrix.lambda }})
          FUNCTION_NAME="branch-${LAMBDA_NAME}"
          
          echo "Deploying Lambda function: $FUNCTION_NAME"
          
          aws lambda update-function-code \
            --function-name "$FUNCTION_NAME" \
            --zip-file fileb://${{ matrix.lambda }}/lambda.zip
          
          echo "✓ Successfully deployed $FUNCTION_NAME"

  summary:
    name: Deployment Summary
    needs: [deploy]
    if: always()
    runs-on: ubuntu-latest
    steps:
      - name: Check deployment results
        run: |
          if [ "${{ needs.deploy.result }}" == "success" ]; then
            echo "✓ All Lambda functions deployed successfully!"
            exit 0
          elif [ "${{ needs.deploy.result }}" == "skipped" ]; then
            echo "⊘ No Lambda changes detected, skipping deployment"
            exit 0
          else
            echo "✗ Lambda deployment failed"
            exit 1
          fi