Use resource path when possible for absoluteResourcePath

Signed-off-by: Louis Chemineau <louis@chmn.me>

lib/ModuleFilenameHelpers.js

@@ -138,7 +138,8 @@ ModuleFilenameHelpers.createFilename = (
 		);
 		identifier = memoize(() => requestShortener.shorten(module.identifier()));
 		moduleId = () => chunkGraph.getModuleId(module);
-		absoluteResourcePath = () => module.identifier().split("!").pop();
+		absoluteResourcePath = () =>
+			requestShortener.shorten(module.nameForCondition());
 		hash = getHash(identifier, hashFunction);
 	}
 	const resource = memoize(() => shortIdentifier().split("!").pop());

test/configCases/source-map/resource-path/index.js

@@ -0,0 +1,8 @@
+it("should not include layer or type in absoluteResourcePath", function() {
+	var fs = require("fs");
+	var source = fs.readFileSync(__filename + ".map", "utf-8");
+	var map = JSON.parse(source);
+	expect(map.sources).toContain("webpack:///test.js");
+});
+
+if (Math.random() < 0) require("./test.js");

test/configCases/source-map/resource-path/test.js

@@ -0,0 +1,3 @@
+var foo = {};
+
+module.exports = foo;

test/configCases/source-map/resource-path/webpack.config.js

@@ -0,0 +1,26 @@
+const path = require("path");
+
+/** @type {import("../../../../").Configuration} */
+module.exports = {
+	node: {
+		__dirname: false,
+		__filename: false
+	},
+	experiments: {
+		layers: true
+	},
+	devtool: "source-map",
+	entry: {
+		main: {
+			import: "./index",
+			layer: "something"
+		}
+	},
+	output: {
+		devtoolModuleFilenameTemplate(info) {
+			const rootDir = process.cwd();
+			const rel = path.relative(rootDir, info.absoluteResourcePath);
+			return `webpack:///${rel}`;
+		}
+	}
+};