preview-docs.yml

name: preview-docs

on: pull_request

jobs:
  run:
    runs-on: ubuntu-latest
    permissions: write-all
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Install Fern
        run: npm install -g fern-api

      - name: Generate preview URL
        id: generate-docs
        env:
          FERN_TOKEN: ${{ secrets.FERN_TOKEN }}
        run: |
          OUTPUT=$(fern generate --docs --preview 2>&1) || true
          echo "$OUTPUT"
          URL=$(echo "$OUTPUT" | grep -oP 'Published docs to \K.*(?= \()')
          echo "Preview URL: $URL"
          echo "🌿 Preview your docs: $URL" > preview_url.txt

      - name: Comment URL in PR
        uses: thollander/actions-comment-pull-request@v2.4.3
        with:
          filePath: preview_url.txt