Function downloadFile

packages/csskit_vscode/src/main.js:169–199

* @param {string} url * @param {string} dest * @returns {Promise }

(url, dest)

 * @returns {Promise<void>}
 */
function downloadFile(url, dest) {
	return new Promise((resolve, reject) => {
		/**
		 * @param {string} currentUrl
		 */
		function follow(currentUrl) {
			https
				.get(currentUrl, { headers: { "User-Agent": "csskit-vscode" } }, (res) => {
					if (res.statusCode >= 300 && res.statusCode < 400 && res.headers.location) {
						follow(res.headers.location);
						res.resume();
						return;
					}
					if (res.statusCode !== 200) {
						reject(new Error(`Download failed with status ${res.statusCode}`));
						res.resume();
						return;
					}
					const file = fs.createWriteStream(dest);
					res.pipe(file);
					file.on("finish", () => file.close(() => resolve()));
					file.on("error", (e) => {
						fs.unlink(dest, () => {});
						reject(e);
					});
				})
				.on("error", reject);
		}
		follow(url);
	});
}