sync-readme.yml

name: Sync README

on:
  schedule:
    - cron: '0 3 * * *'
  workflow_dispatch:

jobs:
  sync-readme:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout my repo
        uses: actions/checkout@v4
        # ⚠️ persist-credentials 생략 → 기본값 true → GITHUB_TOKEN 사용됨

      - name: Download upstream README
        run: |
          curl -L https://raw.githubusercontent.com/SSAFY-Gumi4-Algorithm-Study/.github/main/profile/README.md \
            -o upstream_README.md

      - name: Update README if changed
        run: |
          if [ ! -f README.md ] || ! cmp -s README.md upstream_README.md; then
            mv upstream_README.md README.md

            git config user.name "github-actions[bot]"
            git config user.email "41898282+github-actions[bot]@users.noreply.github.com"

            git add README.md
            git commit -m "README 자동 동기화" || echo "No changes to commit"
            git push
          else
            echo "README is already up to date."
          fi