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node_modules/webpack/lib/EvalDevToolModuleTemplatePlugin.js

@@ -4,26 +4,54 @@
 */
 "use strict";
 
-const RawSource = require("webpack-sources").RawSource;
+const { RawSource } = require("webpack-sources");
 const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
 
+const cache = new WeakMap();
+
 class EvalDevToolModuleTemplatePlugin {
-	constructor(sourceUrlComment, moduleFilenameTemplate) {
-		this.sourceUrlComment = sourceUrlComment || "\n//# sourceURL=[url]";
-		this.moduleFilenameTemplate = moduleFilenameTemplate || "webpack:///[resourcePath]?[loaders]";
+	constructor(options) {
+		this.sourceUrlComment = options.sourceUrlComment || "\n//# sourceURL=[url]";
+		this.moduleFilenameTemplate =
+			options.moduleFilenameTemplate ||
+			"webpack://[namespace]/[resourcePath]?[loaders]";
+		this.namespace = options.namespace || "";
 	}
 
 	apply(moduleTemplate) {
-		moduleTemplate.plugin("module", (source, module) => {
-			const content = source.source();
-			const str = ModuleFilenameHelpers.createFilename(module, this.moduleFilenameTemplate, moduleTemplate.requestShortener);
-			const footer = ["\n",
-				ModuleFilenameHelpers.createFooter(module, moduleTemplate.requestShortener),
-				this.sourceUrlComment.replace(/\[url\]/g, encodeURI(str).replace(/%2F/g, "/").replace(/%20/g, "_").replace(/%5E/g, "^").replace(/%5C/g, "\\").replace(/^\//, ""))
-			].join("\n");
-			return new RawSource(`eval(${JSON.stringify(content + footer)});`);
-		});
-		moduleTemplate.plugin("hash", hash => {
+		moduleTemplate.hooks.module.tap(
+			"EvalDevToolModuleTemplatePlugin",
+			(source, module) => {
+				const cacheEntry = cache.get(source);
+				if (cacheEntry !== undefined) return cacheEntry;
+				const content = source.source();
+				const str = ModuleFilenameHelpers.createFilename(
+					module,
+					{
+						moduleFilenameTemplate: this.moduleFilenameTemplate,
+						namespace: this.namespace
+					},
+					moduleTemplate.runtimeTemplate.requestShortener
+				);
+				const footer =
+					"\n" +
+					this.sourceUrlComment.replace(
+						/\[url\]/g,
+						encodeURI(str)
+							.replace(/%2F/g, "/")
+							.replace(/%20/g, "_")
+							.replace(/%5E/g, "^")
+							.replace(/%5C/g, "\\")
+							.replace(/^\//, "")
+					);
+				const result = new RawSource(
+					`eval(${JSON.stringify(content + footer)});`
+				);
+				cache.set(source, result);
+				return result;
+			}
+		);
+		moduleTemplate.hooks.hash.tap("EvalDevToolModuleTemplatePlugin", hash => {
 			hash.update("EvalDevToolModuleTemplatePlugin");
 			hash.update("2");
 		});