Method _getSourceData

lib/ExternalModule.js:1068–1176

* Returns the source data. * @private * @param {string | string[]} request request * @param {ExternalsType} externalType the external type * @param {RuntimeTemplate} runtimeTemplate the runtime template * @param {ModuleGraph} moduleGraph the module graph * @param {ChunkGraph} chunkGraph

(
		request,
		externalType,
		runtimeTemplate,
		moduleGraph,
		chunkGraph,
		runtime,
		dependencyMeta,
		concatenationScope
	)

	 * @returns {SourceData} the source data
	 */
	_getSourceData(
		request,
		externalType,
		runtimeTemplate,
		moduleGraph,
		chunkGraph,
		runtime,
		dependencyMeta,
		concatenationScope
	) {
		request = normalizeNodeCoreModuleRequest(
			request,
			externalType,
			runtimeTemplate
		);
		switch (externalType) {
			case "this":
			case "window":
			case "self":
				return getSourceForGlobalVariableExternal(request, this.externalType);
			case "global":
				return getSourceForGlobalVariableExternal(
					request,
					runtimeTemplate.globalObject
				);
			case "commonjs":
			case "commonjs2":
			case "commonjs-module":
			case "commonjs-static":
			case "node-commonjs": {
				const { node } = runtimeTemplate.compilation.options.externalsPresets;
				// ESM has no `require`; load via `createRequire` when the target is node
				const createRequireInModule =
					/** @type {BuildInfo} */ (this.buildInfo).javascriptModule &&
					(externalType === "node-commonjs" || Boolean(node));
				if (!createRequireInModule) {
					return getSourceForCommonJsExternal(request);
				}
				// for a universal target (e.g. `["node", "web"]`) load defensively so the browser doesn't crash
				return getSourceForCommonJsExternalInNodeModule(
					request,
					runtimeTemplate,
					runtimeTemplate.isUniversalTarget()
				);
			}
			case "amd":
			case "amd-require":
			case "umd":
			case "umd2":
			case "system":
			case "jsonp": {
				const id = chunkGraph.getModuleId(this);
				return getSourceForAmdOrUmdExternal(
					id !== null ? id : this.identifier(),
					this.isOptional(moduleGraph),
					request,
					runtimeTemplate
				);