name: Sync LMSYS SGLang blogs

on:
  workflow_dispatch:
  schedule:
    - cron: "0 */12 * * *"

permissions:
  contents: write
  pull-requests: write

jobs:
  sync:
    if: github.repository == 'sgl-project/sglang' && github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    steps:
      - name: Check out repository
        uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.11"

      - name: Sync blog cards
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: python docs/scripts/update_lmsys_sglang_blogs.py

      - name: Open or update pull request
        env:
          GH_TOKEN: ${{ secrets.GH_PAT_FOR_PULL_REQUEST }}
        run: |
          set -euo pipefail

          if git diff --quiet -- docs/index.mdx; then
            echo "No blog card changes; nothing to do."
            exit 0
          fi

          BRANCH="bot/lmsys-blog-cards"
          git config user.name "sglang-bot"
          git config user.email "sglang-bot@users.noreply.github.com"

          # Recreate the bot branch as "current main + card diff" and overwrite
          # any previous state, so the PR always shows a clean single-commit diff.
          git checkout -B "$BRANCH"
          git add docs/index.mdx
          git commit -m "docs: sync LMSYS SGLang blog cards"
          git push --force origin "$BRANCH"

          # Open a PR only if one is not already open for this branch; otherwise
          # the force-push above has already updated the existing PR in place.
          if [ -z "$(gh pr list --head "$BRANCH" --base main --state open --json number --jq '.[].number')" ]; then
            gh pr create \
              --base main \
              --head "$BRANCH" \
              --title "docs: sync LMSYS SGLang blog cards" \
              --body $'Automated sync of the LMSYS SGLang blog cards in `docs/index.mdx`.\n\n🤖 Generated with GitHub Actions'
          fi