diff_comment.yml

name: OpenAPI diff comment

on:
  workflow_run:
    workflows: ["Lint and validate OpenAPI specs"]
    types: [completed]

jobs:
  comment:
    runs-on: ubuntu-latest
    if: github.event.workflow_run.outputs.diff_generated
    permissions:
      issues: write
    steps:
      - name: Get the PR number
        id: get_pr_number
        run: |
          echo "pr_number=$(jq '.workflow_run.pull_requests[0].number' $GITHUB_EVENT_PATH)" >> $GITHUB_OUTPUT
      - name: Download diff
        uses: actions/download-artifact@v4
        with:
          name: openapi-diff-log
          workflow: 'Lint and validate OpenAPI specs'
      - name: Create PR comment
        uses: actions/github-script@v7
        with:
          script: |
            const diff = require('fs').readFileSync('diff.md', 'utf8');
            github.rest.issues.createComment({
              issue_number: steps.get_pr_number.outputs.pr_number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: '## OpenAPI diff:\n\n' + diff
            })