Add page links to preview docs PR comment #3829
Workflow file for this run
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| name: Preview Docs | |
| on: | |
| pull_request_target: | |
| types: [opened, synchronize, ready_for_review] | |
| branches: | |
| - main | |
| jobs: | |
| run: | |
| runs-on: ubuntu-latest | |
| permissions: | |
| pull-requests: write # Only for commenting | |
| contents: read # For checking out code | |
| steps: | |
| - name: Checkout repository | |
| uses: actions/checkout@v4 | |
| - name: Checkout PR | |
| if: github.event_name == 'pull_request_target' | |
| run: | | |
| git fetch origin pull/${{ github.event.pull_request.number }}/head:pr-${{ github.event.pull_request.number }} | |
| git checkout pr-${{ github.event.pull_request.number }} | |
| - 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 --instance fern-api.docs.buildwithfern.com/learn 2>&1) || true | |
| echo "$OUTPUT" | |
| URL=$(echo "$OUTPUT" | grep -oP 'Published docs to \K.*(?= \()') | |
| echo "preview_url=$URL" >> $GITHUB_OUTPUT | |
| echo "Preview URL: $URL" | |
| - name: Get page links for changed MDX files | |
| id: page-links | |
| env: | |
| FERN_TOKEN: ${{ secrets.FERN_TOKEN }} | |
| run: | | |
| PREVIEW_URL="${{ steps.generate-docs.outputs.preview_url }}" | |
| CHANGED_FILES=$(git diff --name-only origin/main...HEAD -- '*.mdx' 2>/dev/null || echo "") | |
| if [ -z "$CHANGED_FILES" ] || [ -z "$PREVIEW_URL" ]; then | |
| echo "page_links=" >> $GITHUB_OUTPUT; exit 0 | |
| fi | |
| FILES_PARAM=$(echo "$CHANGED_FILES" | tr '\n' ',' | sed 's/,$//') | |
| RESPONSE=$(curl -sf -H "FERN_TOKEN: $FERN_TOKEN" "${PREVIEW_URL}/api/fern-docs/get-slug-for-file?files=${FILES_PARAM}" 2>/dev/null) || { | |
| echo "page_links=" >> $GITHUB_OUTPUT; exit 0 | |
| } | |
| PAGE_LINKS=$(echo "$RESPONSE" | jq -r --arg url "$PREVIEW_URL" \ | |
| '.mappings[] | select(.slug != null) | "- <\($url)/\(.slug)>"') | |
| if [ -n "$PAGE_LINKS" ]; then | |
| { echo "page_links<<EOF"; echo "$PAGE_LINKS"; echo "EOF"; } >> $GITHUB_OUTPUT | |
| else | |
| echo "page_links=" >> $GITHUB_OUTPUT | |
| fi | |
| - name: Create comment content | |
| run: | | |
| echo ":herb: **Preview your docs:** <${{ steps.generate-docs.outputs.preview_url }}>" > preview_url.txt | |
| if [ -n "${{ steps.page-links.outputs.page_links }}" ]; then | |
| echo "" >> preview_url.txt | |
| echo "**Here are the markdown pages you've updated:**" >> preview_url.txt | |
| echo "${{ steps.page-links.outputs.page_links }}" >> preview_url.txt | |
| fi | |
| - name: Comment URL in PR | |
| uses: thollander/[email protected] | |
| with: | |
| filePath: preview_url.txt |