Merge pull request #387 from izaera/LPS-126503

feat: allow extension of webpack `exposes`

Author: izaera

projects/npm-tools/packages/npm-scripts/src/utils/createFederationConfig.js

@@ -179,8 +179,13 @@ module.exports = async function () {
 
 	await writeWebpackFederationEntryPoint(mainFilePath);
 
-	let {remotes, shared} = getMergedConfig('npmscripts', 'federation');
+	const config = getMergedConfig('npmscripts');
 
+	const {build, federation} = config;
+
+	let {exposes, remotes, shared} = federation;
+
+	exposes = exposes || [];
 	remotes = remotes || [];
 	shared = shared || [];
 
@@ -220,6 +225,7 @@ module.exports = async function () {
 		plugins: [
 			new ModuleFederationPlugin({
 				exposes: {
+					...transformExposes(exposes, build.input),
 					'.': mainFilePath,
 				},
 				filename: 'container.js',
@@ -256,3 +262,21 @@ module.exports = async function () {
 		},
 	};
 };
+
+function transformExposes(exposes, inputDir) {
+	return exposes.reduce((exposes, filePath) => {
+		if (!filePath.startsWith('<inputDir>/')) {
+			throw new Error(
+				"Only paths relative to '<inputDir>/' are accepted as 'exposes'"
+			);
+		}
+
+		filePath = filePath.replace(/^<inputDir>\//, '');
+
+		const exposeName = filePath.replace(/\.js$/i, '');
+
+		exposes[exposeName] = `./${inputDir}/${filePath}`;
+
+		return exposes;
+	}, {});
+}