update-recent.yml

name: Update Recent Solutions

on:
  push:
    branches: [ main ]
  schedule:
    - cron: "0 0 * * *"  # 매일 00:00 UTC (KST 09:00)
  workflow_dispatch:

concurrency:
  group: update-recent-${{ github.ref }}
  cancel-in-progress: false

jobs:
  update:
    runs-on: ubuntu-latest
    permissions:
      contents: write

    env:
      LIMIT: "20"   # 최근 항목 개수 (원하면 15, 20 등으로 변경)

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0   # 전체 히스토리 필요

      - uses: actions/setup-python@v5
        with:
          python-version: "3.x"

      - name: Run updater
        run: |
          python3 scripts/update-recent.py

      - name: Commit & Push if changed
        run: |
          if git diff --quiet README.md; then
            echo "No README changes."
            exit 0
          fi
          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 "chore(readme): auto-update recent solutions"

          # 원격이 앞서있을 수 있으니 rebase 후 재시도 (최대 5회, jittered backoff)
          for i in 1 2 3 4 5; do
            if git push; then
              echo "Pushed on attempt $i."
              exit 0
            fi
            echo "Push rejected (attempt $i). Rebasing on latest origin/main and retrying..."
            if ! git pull --rebase --autostash origin main; then
              echo "Rebase failed on attempt $i; aborting rebase." >&2
              git rebase --abort || true
              exit 1
            fi
            sleep $((RANDOM % 5 + i))
          done
          echo "Failed to push after 5 attempts." >&2
          exit 1