benchmark-comment.yml

name: Benchmark Comment

on:
  workflow_run:
    workflows: [CI, Benchmark On Demand]
    types: [completed]

jobs:
  comment:
    if: >
      github.event.workflow_run.conclusion == 'success' &&
      github.event.workflow_run.event != 'push'
    runs-on: ubuntu-latest
    permissions:
      actions: read
      pull-requests: write

    steps:
      - name: Download benchmark result
        uses: actions/download-artifact@v4
        with:
          name: benchmark-result
          run-id: ${{ github.event.workflow_run.id }}
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        run: |
          echo "number=$(sed -n '1p' benchmark-result.md)" >> "$GITHUB_OUTPUT"
          echo "heading=$(sed -n '2p' benchmark-result.md)" >> "$GITHUB_OUTPUT"
          tail -n +2 benchmark-result.md > benchmark-comment.md
          echo "" >> benchmark-comment.md
          echo "<sub>To run a specific benchmark, comment <code>/benchmark &lt;name&gt;</code><br><code>attributes</code>, <code>aware</code>, <code>class</code>, <code>default</code>, <code>forwarding</code>, <code>merge</code>, <code>named-slots</code>, <code>no-attributes</code>, <code>slot</code>, <code>compilation</code></sub>" >> benchmark-comment.md

      - name: Find existing comment
        uses: peter-evans/find-comment@v3
        id: find
        with:
          issue-number: ${{ steps.meta.outputs.number }}
          comment-author: 'github-actions[bot]'
          body-includes: '${{ steps.meta.outputs.heading }}'

      - name: Post or update comment
        uses: peter-evans/create-or-update-comment@v4
        with:
          issue-number: ${{ steps.meta.outputs.number }}
          comment-id: ${{ steps.find.outputs.comment-id }}
          edit-mode: replace
          body-path: benchmark-comment.md