Function fetchPathsFromURL

lib/util/extractSourceMap.js:105–137

* Fetch from multiple possible file paths * @param {ReadResource} readResource read resource function * @param {string[]} possibleRequests array of possible file paths * @param {string} errorsAccumulator accumulated error messages * @returns {Promise<{ path: string, data?: string }>} source cont

(
	readResource,
	possibleRequests,
	errorsAccumulator = ""
)

 * @returns {Promise<{ path: string, data?: string }>} source content promise
 */
async function fetchPathsFromURL(
	readResource,
	possibleRequests,
	errorsAccumulator = ""
) {
	/** @type {StringOrBuffer} */
	let result;

	try {
		result = await readResource(possibleRequests[0]);
	} catch (error) {
		errorsAccumulator += `${/** @type {Error} */ (error).message}\n\n`;

		const [, ...tailPossibleRequests] = possibleRequests;

		if (tailPossibleRequests.length === 0) {
			/** @type {Error} */ (error).message = errorsAccumulator;

			throw error;
		}

		return fetchPathsFromURL(
			readResource,
			tailPossibleRequests,
			errorsAccumulator
		);
	}

	return {
		path: possibleRequests[0],
		data: result.toString("utf8")
	};
}

/**
 * Fetch source content from URL