Method _computeAffectedModules

lib/Compilation.js:2837–3006

* Compute affected modules. * @private * @param {Set<Module>} modules modules

(modules)

	 * @param {Set<Module>} modules modules
	 */
	_computeAffectedModules(modules) {
		const moduleMemCacheCache = this.compiler.moduleMemCaches;
		if (!moduleMemCacheCache) return;
		if (!this.moduleMemCaches) {
			this.moduleMemCaches = new Map();
			this.moduleGraph.setModuleMemCaches(this.moduleMemCaches);
		}
		const { moduleGraph, moduleMemCaches } = this;
		/** @type {Set<Module>} */
		const affectedModules = new Set();
		/** @type {Set<Module>} */
		const infectedModules = new Set();
		let statNew = 0;
		let statChanged = 0;
		let statUnchanged = 0;
		let statReferencesChanged = 0;
		let statWithoutBuild = 0;

		/**
		 * Compute references.
		 * @param {Module} module module
		 * @returns {WeakReferences | undefined} references
		 */
		const computeReferences = (module) => {
			/** @type {WeakReferences | undefined} */
			let references;
			for (const connection of moduleGraph.getOutgoingConnections(module)) {
				const d = connection.dependency;
				const m = connection.module;
				if (!d || !m || unsafeCacheDependencies.has(d)) continue;
				if (references === undefined) references = new WeakMap();
				references.set(d, m);
			}
			return references;
		};

		/**
		 * Compares references.
		 * @param {Module} module the module
		 * @param {WeakReferences | undefined} references references
		 * @returns {boolean} true, when the references differ
		 */
		const compareReferences = (module, references) => {
			if (references === undefined) return true;
			for (const connection of moduleGraph.getOutgoingConnections(module)) {
				const d = connection.dependency;
				if (!d) continue;
				const entry = references.get(d);
				if (entry === undefined) continue;
				if (entry !== connection.module) return false;
			}
			return true;
		};

		const modulesWithoutCache = new Set(modules);
		for (const [module, cachedMemCache] of moduleMemCacheCache) {
			if (modulesWithoutCache.has(module)) {
				const buildInfo = module.buildInfo;