docs: Enable indexing for Stainless comparison page #2196

	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"
	echo "🌿 Preview your docs: $URL" > preview_url.txt

	- name: Comment URL in PR
	uses: thollander/[email protected]
	with:
	filePath: preview_url.txt

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