.github/workflows/pr-review-trigger.yml

name: PR Review - Trigger
on:
  pull_request:
    types: [ready_for_review, opened, review_requested]
  pull_request_review_comment:
    types: [created]

permissions: {}

# Deduplicate simultaneous pull_request events for the same fork PR.
# When reviewers are requested at the same time, GitHub fires multiple
# review_requested events. Without this group each event triggers a
# separate review via workflow_run, producing duplicate reviews.
concurrency:
  group: pr-review-trigger-${{ github.event.pull_request.number }}
  cancel-in-progress: true

jobs:
  save-context:
    if: github.event.pull_request.head.repo.fork
    runs-on: ubuntu-latest
    steps:
      - name: Save event context
        env:
          PR_NUMBER: ${{ github.event.pull_request.number }}
          PR_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
          COMMENT_JSON: ${{ toJSON(github.event.comment) }}
        run: |
          mkdir -p context
          printf '%s' "${{ github.event_name }}" > context/event_name.txt
          printf '%s' "$PR_NUMBER" > context/pr_number.txt
          printf '%s' "$PR_HEAD_SHA" > context/pr_head_sha.txt
          if [ "${{ github.event_name }}" = "pull_request_review_comment" ]; then
            printf '%s' "$COMMENT_JSON" > context/comment.json
          fi

      - name: Upload context
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: pr-review-context
          path: context/
          retention-days: 1