Method _materializedNamespaceObject

lib/RuntimeTemplate.js:1386–1440

* Materializes a namespace object that keeps the original export names while * the module's own exports are mangled. Returns undefined when no export was * mangled (then the raw namespace object can be used as-is). * @template GenerateContext * @param {object} options options * @param {Mod

({
		moduleGraph,
		module,
		importVar,
		initFragments,
		runtime,
		runtimeRequirements
	})

	 * @returns {string | undefined} expression of the materialized namespace object, or undefined
	 */
	_materializedNamespaceObject({
		moduleGraph,
		module,
		importVar,
		initFragments,
		runtime,
		runtimeRequirements
	}) {
		const exportsInfo = moduleGraph.getExportsInfo(module);
		/** @type {string[]} */
		const definitions = [];
		let mangled = false;
		for (const exportInfo of exportsInfo.orderedExports) {
			if (exportInfo.provided === false) continue;
			const used = exportsInfo.getUsedName([exportInfo.name], runtime);
			if (!used) continue;
			if (used instanceof InlinedUsedName) {
				// An inlined export isn't reachable by name on the raw exports object,
				// so the decoupled object must expose the inlined value directly.
				mangled = true;
				definitions.push(
					`${propertyName(exportInfo.name)}: ${this.returningFunction(
						used.render(
							Template.toNormalComment(
								`inlined export ${propertyAccess([exportInfo.name])}`
							)
						)
					)}`
				);
				continue;
			}
			if (used[used.length - 1] !== exportInfo.name) mangled = true;
			definitions.push(
				`${propertyName(exportInfo.name)}: ${this.returningFunction(
					`${importVar}${propertyAccess(/** @type {string[]} */ (used))}`
				)}`
			);
		}
		if (!mangled) return;
		const name = `${importVar}_namespace_object`;
		runtimeRequirements.add(RuntimeGlobals.exports);
		runtimeRequirements.add(RuntimeGlobals.makeNamespaceObject);
		runtimeRequirements.add(RuntimeGlobals.definePropertyGetters);
		initFragments.push(
			new InitFragment(
				`var ${name} = {};\n${RuntimeGlobals.makeNamespaceObject}(${name});\n${
					RuntimeGlobals.definePropertyGetters
				}(${name}, {\n\t${definitions.join(",\n\t")}\n});\n`,
				InitFragment.STAGE_PROVIDES,
				0,
				name
			)
		);
		return name;
	}

	/**
	 * Returns expression.