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

      - uses: ./.github/actions/setup-fern

      - name: Generate preview URL
        id: generate-docs
        env:
          FERN_TOKEN: ${{ secrets.FERN_TOKEN }}
          POSTHOG_PROJECT_API_KEY: ${{ secrets.POSTHOG_PROJECT_API_KEY }}
        run: |
          set -euo pipefail
          node scripts/fern/run.cjs generate --docs --preview --log-level debug 2>&1 | tee "$RUNNER_TEMP/fern-preview.log"
          URL=$(grep -oP 'Published docs to \K.*(?= \()' "$RUNNER_TEMP/fern-preview.log")
          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