expand-release-detail.yml

name: Add diff to release
on:
  release:
    types: [published]

jobs:
  show_diff:
    name: Show ts diff in release notes
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
        with:
          fetch-depth: 0

      - name: Setup Node
        uses: actions/setup-node@v2

      - uses: actions/cache@v2
        id: node-modules-cache
        with:
          path: |
            node_modules
            */*/node_modules
          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}

      - name: NPM Install
        run: npm install

      - name: Generate diff
        id: generate_diff
        run: npm run --silent generate:diff > diff.md
      - name: Read diff.md
        id: diff
        uses: juliangruber/read-file-action@v1
        with:
          path: diff.md
        
      - uses: octokit/request-action@v2.x
        id: get_latest_release
        with:
          route: GET /repos/${{ github.repository }}/releases/latest
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      - uses: octokit/request-action@v2.x
        id: update_release
        with:
          route: PATCH /repos/${{ github.repository }}/releases/{release_id}
          release_id: ${{ fromJson(steps.get_latest_release.outputs.data).id }}
          body: |
            |
            ${{ fromJson(steps.get_latest_release.outputs.data).body }}
            ${{ steps.diff.outputs.content }}
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}