typescript-nightly #318

	name: typescript-nightly

	on:
	schedule:
	# Schedule to run nightly at midnight
	- cron: '0 0 * * *'
	workflow_dispatch:

	jobs:
	compare:
	runs-on: macos-latest
	steps:
	- name: Set up Node.js
	uses: actions/setup-node@v4
	with:
	node-version: 18

	- name: Get latest TypeScript version
	id: get-versions
	run: \|
	# Fetch the latest published version of TypeScript on npm
	latest_version=$(npm show typescript dist-tags.latest)

	# Get the currently installed version
	rc_version=$(npm show typescript dist-tags.rc)

	latest_major_minor=$(echo "$latest_version" \| cut -d '.' -f 1,2)
	rc_major_minor=$(echo "$rc_version" \| cut -d '.' -f 1,2)

	echo "latest_version=$latest_major_minor" >> $GITHUB_OUTPUT
	echo "rc_version=$rc_major_minor" >> $GITHUB_OUTPUT

	test:
	runs-on: macos-latest
	# Skip TypeScript compatibility check on "main".
	# A merged pull request implies passing "typescript" job.
	if: ${{ needs.compare.outputs.latest_version != needs.compare.outputs.rc_version }}
	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Set up Node.js
	uses: actions/setup-node@v4
	with:
	node-version: 18

	- name: Set up pnpm
	uses: pnpm/action-setup@v4
	with:
	version: 8.15.6

	- name: Install dependencies
	run: pnpm install

	- name: Build
	run: pnpm build

	- name: Install TypeScript RC
	run: pnpm add typescript@rc

	- name: Write tsconfig
	run: \|
	cp test/typings/tsconfig.5.2.json test/typings/tsconfig.${needs.compare.outputs.rc_version}.json

	- name: Typings tests
	run: \|
	pnpm tsc --version
	pnpm test:ts

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