Method close

lib/Watching.js:482–550

* Processes the provided error callback. * @param {ErrorCallback} callback signals when the watcher is closed * @returns {void}

(callback)

	 * @returns {void}
	 */
	close(callback) {
		if (this._closeCallbacks) {
			if (callback) {
				this._closeCallbacks.push(callback);
			}
			return;
		}
		/**
		 * Processes the provided err.
		 * @param {Error | null} err error if any
		 * @param {Compilation=} compilation compilation if any
		 */
		const finalCallback = (err, compilation) => {
			this.running = false;
			this.compiler.running = false;
			this.compiler.watching = undefined;
			this.compiler.watchMode = false;
			this.compiler.modifiedFiles = undefined;
			this.compiler.removedFiles = undefined;
			this.compiler.fileTimestamps = undefined;
			this.compiler.contextTimestamps = undefined;
			this.compiler.fsStartTime = undefined;
			/**
			 * Processes the provided err.
			 * @param {Error | null} err error if any
			 */
			const shutdown = (err) => {
				this.compiler.hooks.watchClose.call();
				const closeCallbacks =
					/** @type {ErrorCallback[]} */
					(this._closeCallbacks);
				this._closeCallbacks = undefined;
				for (const cb of closeCallbacks) cb(err);
			};
			if (compilation) {
				const logger = compilation.getLogger("webpack.Watching");
				logger.time("storeBuildDependencies");
				this.compiler.cache.storeBuildDependencies(
					compilation.buildDependencies,
					(err2) => {
						logger.timeEnd("storeBuildDependencies");
						shutdown(err || err2);
					}
				);
			} else {
				shutdown(err);
			}
		};

		this.closed = true;
		if (this.watcher) {
			this.watcher.close();
			this.watcher = null;
		}
		if (this.pausedWatcher) {
			this.pausedWatcher.close();
			this.pausedWatcher = null;
		}