deploy.yml

name: Backend CD

on:
  pull_request:
    types: [closed]

jobs:
  build-and-push:
    if: |
      github.event.pull_request.merged == true &&
      github.event.pull_request.base.ref == 'main' &&
      contains(github.event.pull_request.labels.*.name, '🎅🏼deploy')

    runs-on: ubuntu-latest  

    steps:
    - name: 리포지토리를 가져옵니다
      uses: actions/checkout@v2
      with:
        fetch-depth: 2

    - name: JDK 17을 설치합니다
      uses: actions/setup-java@v4
      with:
        java-version: '17'
        distribution: 'corretto'

    - name: Install redis
      run: sudo apt-get install -y redis-tools redis-server

    - name: Verify that redis is up
      run: redis-cli ping

    - name: Gradle 명령 실행을 위한 권한을 부여합니다
      run: chmod +x gradlew

    - name: 변경된 모듈을 체크한다.
      id: check_changes
      run: |
        git fetch origin main
        if git diff --name-only HEAD^ HEAD | grep -q "^domain/"; then
          echo "domain 모듈이 변경되었습니다."
          echo "::set-output name=domain_changed::true"
        else
          if git diff --name-only HEAD^ HEAD | grep -q "^app-api/"; then
            echo "api 모듈이 변경되었습니다."
            echo "::set-output name=api_changed::true"
          fi
          if git diff --name-only HEAD^ HEAD | grep -q "^app-scheduler/"; then
            echo "scheduler 모듈이 변경되었습니다."
            echo "::set-output name=scheduler_changed::true"
          fi
        fi

    - name: 변경된 모듈을 빌드한다.
      run: |
        domain_changed=${{ steps.check_changes.outputs.domain_changed }}
        api_changed=${{ steps.check_changes.outputs.api_changed }}
        scheduler_changed=${{ steps.check_changes.outputs.scheduler_changed }}

        if [ "$domain_changed" == "true" ]; then
          echo "도메인 모듈 및 하위 모듈을 빌드합니다."
          ./gradlew build --parallel
        else
          if [ "$api_changed" == "true" ]; then
            echo "api 모듈을 빌드합니다."
            ./gradlew :app-api:build
          fi

          if [ "$scheduler_changed" == "true" ]; then
            echo "scheduler 모듈을 빌드합니다."
            ./gradlew :app-scheduler:build
          fi

          if [ "$api_changed" != "true" ] && [ "$scheduler_changed" != "true" ]; then
            echo "모듈에 변경 사항이 없습니다."
          fi
        fi

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v1  

    - name: 도커 로그인
      uses: docker/login-action@v1
      with:
        username: ${{ secrets.DOCKERHUB_USERNAME }}  
        password: ${{ secrets.DOCKERHUB_TOKEN }}     

    - name: 도커 이미지 build 후 push (API)
      uses: docker/build-push-action@v2
      if: |
        steps.check_changes.outputs.domain_changed == 'true' || 
        steps.check_changes.outputs.api_changed == 'true'
      with:
        context: ./app-api
        file: ./app-api/Dockerfile
        push: true  
        tags: ${{ secrets.DOCKERHUB_USERNAME }}/${{ secrets.API_IMAGE }}:${{ github.sha }}
        platforms: linux/amd64

    - name: 도커 이미지 build 후 push (Scheduler)
      uses: docker/build-push-action@v2
      if: |
        steps.check_changes.outputs.domain_changed == 'true' || 
        steps.check_changes.outputs.scheduler_changed == 'true'
      with:
        context: ./app-scheduler
        file: ./app-scheduler/Dockerfile
        push: true
        tags: ${{ secrets.DOCKERHUB_USERNAME }}/${{ secrets.SCHEDULER_IMAGE }}:${{ github.sha }}
        platforms: linux/amd64
    
  deploy-to-ec2:
    runs-on: ubuntu-latest
    needs: build-and-push
    steps:
    - name: Install SSH
      run: sudo apt update && sudo apt install -y openssh-client

    - name: EC2 접속 및 배포 진행
      uses: appleboy/ssh-action@master
      with:
        host: ${{ secrets.EC2_HOST }}
        username: ${{ secrets.EC2_USERNAME }}
        key: ${{ secrets.EC2_PRIVATE_KEY }}
        script: |
          export COMMIT_VERSION=${{ github.sha }} &&
          ./deploy.sh

  notify-slack:
    runs-on: ubuntu-latest
    needs: deploy-to-ec2
    
    steps:
      - name: 배포 성공시 Slack으로 알립니다
        uses: 8398a7/action-slack@v3
        with:
          author_name: 배포 성공
          status: ${{ job.status }}
          fields: repo,message,commit,author,action,eventName,ref,workflow # selectable (default: repo,message)
        env:
          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }} # required
        if: always() # Pick up events even if the job fails or is canceled.