const { execSync } = require("child_process");

module.exports = function () {
	const diff = execSync(
		`git diff origin/${process.env.GITHUB_BASE_REF} -- packages/create-cloudflare/src/frameworks/package.json`
	).toString();

	const changedPackages = diff
		.match(/-\s*".*?":\s".*?",?/g)
		.map((match) => match.match(/-\s*"(.*)":/)?.[1])
		.filter(Boolean);

	if (changedPackages.length === 0) {
		console.warn("No changes detected!");
		return null;
	} else if (changedPackages.length > 1) {
		console.warn(
			`More then one package has changed (${changedPackages.join(
				", "
			)}), that's not currently supported`
		);
		throw new Error("More than one package bump detected");
	} else {
		return changedPackages[0];
	}
};