deploy-backend.yml

name: Deploy to AWS EC2

on:
  workflow_run:
    workflows: [Run CI]
    types:
      - completed

jobs:
  deploy-backend:
    if: >
      github.event.workflow_run.conclusion == 'success' &&
      github.event.workflow_run.head_branch == 'main' &&
      github.event.workflow_run.event == 'push'

    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3

            - name: Download artifact
        uses: actions/download-artifact@v3
        with:
          name: changed-files
          path: .

      - name: Check for backend changes
        id: backend-check
        run: |
          if grep '^backend/' changed_files.txt; then
            echo "Backend changed"
            echo "DEPLOY=true" >> $GITHUB_ENV
          else
            echo "No backend changes"
            echo "DEPLOY=false" >> $GITHUB_ENV
          fi

      - name: Exit if no backend changes
        if: env.DEPLOY == 'false'
        run: exit 0

      - name: Deploy on EC2
        uses: appleboy/ssh-action@master
        with:
          host: ${{ secrets.SSH_HOST }}
          username: ${{ secrets.SSH_USERNAME }}
          key: ${{ secrets.SSH_KEY }}
          script: |
            cd feed-forward || exit 1
            git pull origin main
            docker-compose -f docker-compose.yml -f docker-compose.prod.yml down
            docker rmi $(docker images -q)
            docker system prune -a
            docker-compose -f docker-compose.yml -f docker-compose.prod.yml up -d --build