check-open-prs.yml

name: Check Open PRs and Notify Slack

on:
  schedule:
    # 매 1시간마다 실행
    - cron: '0 * * * *'

  workflow_dispatch: # 수동 실행을 위한 트리거
    inputs:
      force_notify:
        description: "Force Slack notification"

jobs:
  notify_open_prs:
    runs-on: ubuntu-latest

    steps:
    # 1. GitHub 리포지토리 체크아웃
    - name: Checkout repository
      uses: actions/checkout@v3

    # 2. PR 데이터 수집
    - name: Fetch Open PRs with Reviewers
      id: fetch_prs
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      run: |
        echo "Fetching open PRs with reviewers..."
        # gh CLI를 사용해 PR 목록 가져오기
        prs=$(gh pr list --json number,title,url,reviewRequests --jq '.[] | select(.reviewRequests | length > 0)')
        
        if [ -z "$prs" ]; then
          echo "No PRs with reviewers found."
          echo "prs_output=" > $GITHUB_ENV
          exit 0
        fi

        echo "Found PRs: $prs"
        echo "prs_output=$prs" >> $GITHUB_ENV

    # 3. Slack 알림 전송
    - name: Notify Slack
      if: env.prs_output != ''
      env:
        SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}
        PRS_OUTPUT: ${{ env.prs_output }}
      run: |
        echo "Preparing Slack notification..."
        
        if [ -z "$PRS_OUTPUT" ]; then
          echo "No PRs to notify about."
          exit 0
        fi

        # Slack 메시지 작성
        message=":warning: *Open Pull Requests with Reviewers:*"
        echo "$PRS_OUTPUT" | jq -c '.[]' | while read -r pr; do
          title=$(echo $pr | jq -r '.title')
          url=$(echo $pr | jq -r '.url')
          reviewers=$(echo $pr | jq -r '.reviewRequests | map(.login) | join(", ")')
          message+="\n- <$url|$title> (Reviewers: $reviewers)"
        done

        # Slack 메시지 전송
        curl -X POST -H 'Content-type: application/json' --data "{\"text\":\"$message\"}" $SLACK_WEBHOOK_URL