name: Monitor vLLM Releases

on:
  schedule:
    - cron: '0 0 * * *' # Every day at midnight
  workflow_dispatch:


permissions:
    contents: read
   
jobs:
  check-vllm-release:
    runs-on: ubuntu-latest
    steps:
      - name: Restore last known vLLM tag
        uses: actions/cache/restore@v4
        with:
          path: .vllm-last-tag
          key: vllm-tag-${{ github.run_id }}
          restore-keys: vllm-tag-

      - name: Get latest vLLM release
        id: vllm
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          response=$(curl -sf https://api.github.com/repos/vllm-project/vllm/releases/latest \
            -H "Authorization: Bearer $GH_TOKEN")
          echo "tag=$(echo "$response" | jq -r '.tag_name')" >> $GITHUB_OUTPUT
          echo "url=$(echo "$response" | jq -r '.html_url')" >> $GITHUB_OUTPUT
          echo "name=$(echo "$response" | jq -r '.name')" >> $GITHUB_OUTPUT

      - name: Check if new release
        id: check
        run: |
          last=$(cat .vllm-last-tag 2>/dev/null || echo "")
          current="${{ steps.vllm.outputs.tag }}"
          echo "Last: $last  Current: $current"
          if [ -n "$current" ] && [ "$last" != "$current" ]; then
            echo "is_new=true" >> $GITHUB_OUTPUT
          else
            echo "is_new=false" >> $GITHUB_OUTPUT
          fi

      - name: Notify Slack
        if: steps.check.outputs.is_new == 'true'
        run: |
          curl -sf -X POST "${{ secrets.SLACK_WEBHOOK_URL }}" \
            -H "Content-Type: application/json" \
            -d '{
              "text": ":rocket: New vLLM release: *${{ steps.vllm.outputs.tag }}*",
              "blocks": [
                {
                  "type": "section",
                  "text": {
                    "type": "mrkdwn",
                    "text": ":rocket: *New vLLM Release: ${{ steps.vllm.outputs.tag }}*\n<${{ steps.vllm.outputs.url }}|View on GitHub>"
                  }
                }
              ]
            }'

      - name: Save new tag
        if: steps.check.outputs.is_new == 'true'
        run: echo "${{ steps.vllm.outputs.tag }}" > .vllm-last-tag

      - name: Update cache
        if: steps.check.outputs.is_new == 'true'
        uses: actions/cache/save@v4
        with:
          path: .vllm-last-tag
          key: vllm-tag-${{ steps.vllm.outputs.tag }}