Method getFakeMap

lib/ContextModule.js:670–733

* @param {Dependency[]} dependencies all dependencies * @param {ChunkGraph} chunkGraph chunk graph * @returns {FakeMap | FakeMapType} fake map

(dependencies, chunkGraph)

	 * @returns {FakeMap | FakeMapType} fake map
	 */
	getFakeMap(dependencies, chunkGraph) {
		if (!this.options.namespaceObject) {
			return 9;
		}
		const moduleGraph = chunkGraph.moduleGraph;
		// bitfield
		let hasType = 0;
		const comparator = compareModulesById(chunkGraph);
		// if we filter first we get a new array
		// therefore we don't need to create a clone of dependencies explicitly
		// therefore the order of this is !important!
		const sortedModules = dependencies
			.map(
				(dependency) =>
					/** @type {Module} */ (moduleGraph.getModule(dependency))
			)
			.filter(Boolean)
			.sort(comparator);
		/** @type {FakeMap} */
		const fakeMap = Object.create(null);
		for (const module of sortedModules) {
			const exportsType = module.getExportsType(
				moduleGraph,
				this.options.namespaceObject === "strict"
			);
			const id = /** @type {ModuleId} */ (chunkGraph.getModuleId(module));
			switch (exportsType) {
				case "namespace":
					fakeMap[id] = 9;
					hasType |= 1;
					break;
				case "dynamic":
					fakeMap[id] = 7;
					hasType |= 2;
					break;
				case "default-only":
					fakeMap[id] = 1;
					hasType |= 4;
					break;
				case "default-with-named":
					fakeMap[id] = 3;
					hasType |= 8;
					break;
				default:
					throw new Error(`Unexpected exports type ${exportsType}`);
			}
		}
		if (hasType === 1) {
			return 9;
		}
		if (hasType === 2) {
			return 7;
		}
		if (hasType === 4) {
			return 1;
		}
		if (hasType === 8) {
			return 3;