Method render

lib/library/SystemLibraryPlugin.js:83–246

* Returns source with library export. * @param {Source} source source * @param {RenderContext} renderContext render context * @param {LibraryContext<T>} libraryContext context * @returns {Source} source with library export

(source, { chunkGraph, moduleGraph, chunk }, { options, compilation })

	 * @returns {Source} source with library export
	 */
	render(source, { chunkGraph, moduleGraph, chunk }, { options, compilation }) {
		const modules = chunkGraph
			.getChunkModules(chunk)
			.filter(
				(m) => m instanceof ExternalModule && m.externalType === "system"
			);
		const externals = /** @type {ExternalModule[]} */ (modules);

		// The name this bundle should be registered as with System
		const name = options.name
			? `${JSON.stringify(compilation.getPath(options.name, { chunk }))}, `
			: "";

		// The array of dependencies that are external to webpack and will be provided by System
		const systemDependencies = JSON.stringify(
			externals.map((m) =>
				typeof m.request === "object" && !Array.isArray(m.request)
					? m.request.amd
					: m.request
			)
		);

		// The name of the variable provided by System for exporting
		const dynamicExport = "__WEBPACK_DYNAMIC_EXPORT__";

		// An array of the internal variable names for the webpack externals
		const externalWebpackNames = externals.map(
			(m) =>
				`__WEBPACK_EXTERNAL_MODULE_${Template.toIdentifier(
					`${chunkGraph.getModuleId(m)}`
				)}__`
		);

		// Declaring variables for the internal variable names for the webpack externals
		const externalVarDeclarations = externalWebpackNames
			.map((name) => `var ${name} = {};`)
			.join("\n");

		// Define __esModule flag on all internal variables and helpers
		/** @type {string[]} */
		const externalVarInitialization = [];

		// The system.register format requires an array of setter functions for externals.
		const setters =
			externalWebpackNames.length === 0
				? ""
				: Template.asString([
						"setters: [",
						Template.indent(
							externals
								.map((module, i) => {
									const external = externalWebpackNames[i];
									const exportsInfo = moduleGraph.getExportsInfo(module);
									const otherUnused =
										exportsInfo.otherExportsInfo.getUsed(chunk.runtime) ===
										UsageState.Unused;
									/** @type {string[]} */
									const instructions = [];