release-notes.yml

name: Generate Release Notes

on:
  workflow_dispatch: # Allows manual trigger of the workflow

jobs:
  generate_release_notes:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Get latest release
        id: get_latest_release
        run: |
          latest_release=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" "https://api.github.com/repos/${{ github.repository }}/releases/latest")
          echo "latest_release_date=$(echo $latest_release | jq -r .published_at)" >> $GITHUB_ENV

      - name: Fetch closed issues since latest release
        id: fetch_closed_issues
        run: |
          issues=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" "https://api.github.com/repos/${{ github.repository }}/issues?state=closed&since=${{ env.latest_release_date }}&per_page=100")
          echo "$issues" > closed_issues.json

      - name: Generate release notes
        id: generate_release_notes
        run: |
          release_notes="# Release Notes\n\n"
          release_notes+="$(jq -r '.[] | select(has("pull_request") | not) | "- #\(.number) \(.title) (closed on \(.closed_at[:10]))"' closed_issues.json)"
          release_notes_b64=$(echo "$release_notes" | base64)
          echo "release_notes_b64=$release_notes_b64" >> $GITHUB_ENV

      - name: Output release notes
        run: |
          echo "${{ env.release_notes_b64 }}" | base64 --decode