Method restore

lib/cache/PackFileCacheStrategy.js:1411–1424

* Returns promise to the cached content. * @param {string} identifier unique name for the resource * @param {Etag | null} etag etag of the resource * @returns {Promise<Data>} promise to the cached content

(identifier, etag)

	 * @returns {Promise<Data>} promise to the cached content
	 */
	restore(identifier, etag) {
		return this._getPack()
			.then((pack) =>
				pack.get(identifier, etag === null ? null : etag.toString())
			)
			.catch((err) => {
				if (err && err.code !== "ENOENT") {
					this.logger.warn(
						`Restoring failed for ${identifier} from pack: ${err}`
					);
					this.logger.debug(err.stack);
				}
			});
	}

	/**
	 * Stores build dependencies.