Method _readFileTimestamp

lib/FileSystemInfo.js:3635–3669

* @private * @type {Processor<string, FileSystemInfoEntry>}

(path, callback)

	 * @type {Processor<string, FileSystemInfoEntry>}
	 */
	_readFileTimestamp(path, callback) {
		this.fs.stat(path, (err, _stat) => {
			if (err) {
				if (err.code === "ENOENT") {
					this._fileTimestamps.set(path, null);
					this._cachedDeprecatedFileTimestamps = undefined;
					return callback(null, null);
				}
				return callback(/** @type {WebpackError} */ (err));
			}
			const stat = /** @type {IStats} */ (_stat);
			/** @type {FileSystemInfoEntry} */
			let ts;
			if (stat.isDirectory()) {
				ts = {
					safeTime: 0,
					timestamp: undefined
				};
			} else {
				const mtime = Number(stat.mtime);

				if (mtime) applyMtime(mtime);

				ts = {
					safeTime: mtime ? mtime + FS_ACCURACY : Infinity,
					timestamp: mtime
				};
			}

			this._fileTimestamps.set(path, ts);
			this._cachedDeprecatedFileTimestamps = undefined;

			callback(null, ts);
		});
	}

	/**
	 * @private