release_notes.yml

name: release_notes

on:
  workflow_dispatch:
    inputs:
      releasePr:
        description: 'Enter release PR number'
        required: true
        type: number
  issue_comment:
    types: [created]

permissions:
  contents: write
  pull-requests: write

jobs:
  release_notes:
    runs-on: ubuntu-latest
    # Run only if dispatched or comment on a pull request
    if: ${{ github.event_name == 'workflow_dispatch' || (github.event_name == 'issue_comment' && github.event.issue.pull_request && github.event.comment.body == 'run release_notes') }}
    steps:
      # Determine if the triggering_actor is allowed to run this action
      # We only permit maintainers
      # Not only is 'triggering_actor' common between the trigger events it will also change if someone re-runs an old job
      - name: check if triggering_actor is allowed to generate notes
        env:
          GITHUB_TOKEN: ${{ github.token }}
          COMMENTER: ${{ github.triggering_actor && github.triggering_actor || 'empty_triggering_actor' }}
          API_ENDPOINT: /repos/${{ github.repository }}/collaborators?permission=maintain
        shell: bash
        run: |
          if [ $COMMENTER = "empty_triggering_actor" ]; then exit 1; fi
          set -o pipefail
          if gh api "$API_ENDPOINT" --paginate --jq ".[].login" | grep -q "^$COMMENTER\$"; then
            echo "$COMMENTER permitted to trigger notes!" && exit 0
          else
            echo "$COMMENTER not permitted to trigger notes" && exit 1
          fi

      # checkout the HEAD ref from prNumber
      - uses: actions/checkout@v3
        with:
          ref: refs/pull/${{ github.event_name == 'issue_comment' && github.event.issue.number || inputs.releasePr }}/head


      # Setup Node.js and npm install
      - name: actions/setup
        uses: ./.github/actions/setup

      # See: https://github.com/googleapis/release-please/issues/1274

      # Get the PRs that are in this release
      # Outputs a list of comma seperated PR numbers, parsed from HISTORY.md
      - id: pr_list
        run: node .github/scripts/pr_list.mjs
        env:
          GITHUB_TOKEN: ${{ github.token }}

      # From the list of PRs, gather the highlight sections of the PR body
      # output JSON with "highlights" key (to preserve newlines)
      - id: highlights
        run: node .github/scripts/highlights.mjs
        env:
          GITHUB_TOKEN: ${{ github.token }}
          PR_LIST: ${{ steps.pr_list.outputs.pr_list }}

      # The combined output is available
      - id: release_notes
        run: node .github/scripts/release_notes.mjs
        env:
          GITHUB_TOKEN: ${{ github.token }}
          HIGHLIGHTS: ${{ steps.highlights.outputs.highlights }}

      # Update the release PR body
      - run: gh pr edit ${{ github.event_name == 'issue_comment' && github.event.issue.number || inputs.releasePr }} --body-file ${{ steps.release_notes.outputs.release_notes_path }}
        shell: bash
        env:
          GITHUB_TOKEN: ${{ github.token }}