Method apply

lib/optimize/ModuleConcatenationPlugin.js:84–562

* Applies the plugin by registering its hooks on the compiler. * @param {Compiler} compiler the compiler instance * @returns {void}

(compiler)

	 * @returns {void}
	 */
	apply(compiler) {
		const { _backCompat: backCompat } = compiler;
		compiler.hooks.compilation.tap(PLUGIN_NAME, (compilation) => {
			if (compilation.moduleMemCaches) {
				throw new Error(
					class="st">"optimization.concatenateModules can't be used with cacheUnaffected as module concatenation is a global effect"
				);
			}
			const moduleGraph = compilation.moduleGraph;
			/** @type {Map<Module, string | ((requestShortener: RequestShortener) => string)>} */
			const bailoutReasonMap = new Map();

			/**
			 * Sets bailout reason.
			 * @param {Module} module the module
			 * @param {string | ((requestShortener: RequestShortener) => string)} reason the reason
			 */
			const setBailoutReason = (module, reason) => {
				setInnerBailoutReason(module, reason);
				moduleGraph
					.getOptimizationBailout(module)
					.push(
						typeof reason === class="st">"function"
							? (rs) => formatBailoutReason(reason(rs))
							: formatBailoutReason(reason)
					);
			};

			/**
			 * Sets inner bailout reason.
			 * @param {Module} module the module
			 * @param {string | ((requestShortener: RequestShortener) => string)} reason the reason
			 */
			const setInnerBailoutReason = (module, reason) => {
				bailoutReasonMap.set(module, reason);
			};

			/**
			 * Gets inner bailout reason.
			 * @param {Module} module the module
			 * @param {RequestShortener} requestShortener the request shortener
			 * @returns {string | ((requestShortener: RequestShortener) => string) | undefined} the reason
			 */
			const getInnerBailoutReason = (module, requestShortener) => {
				const reason = bailoutReasonMap.get(module);
				if (typeof reason === class="st">"function") return reason(requestShortener);
				return reason;
			};

			/**
			 * Format bailout warning.
			 * @param {Module} module the module
			 * @param {Problem} problem the problem
			 * @returns {(requestShortener: RequestShortener) => string} the reason
			 */
			const formatBailoutWarning = (module, problem) => (requestShortener) => {
				if (typeof problem === class="st">"function") {
					return formatBailoutReason(