feat(ssr-perf-check): check whether server side rendering is used

- performance gain by not bundling for the server when ssr is not in use

Author: Alain Sollberger

libs/native-federation-core/src/lib/core/build-for-federation.ts

@@ -58,13 +58,9 @@ export async function buildForFederation(
       'browser'
     );
 
-    const sharedPackageInfoServer = await bundleShared(
-      sharedServer,
-      config,
-      fedOptions,
-      externals,
-      'node'
-    );
+    const sharedPackageInfoServer = fedOptions.ssr
+      ? await bundleShared(sharedServer, config, fedOptions, externals, 'node')
+      : [];
 
     const separatePackageInfoBrowser = await bundleSeparate(
       separateBrowser,
@@ -74,13 +70,15 @@ export async function buildForFederation(
       'browser'
     );
 
-    const separatePackageInfoServer = await bundleSeparate(
-      separateServer,
-      externals,
-      config,
-      fedOptions,
-      'node'
-    );
+    const separatePackageInfoServer = fedOptions.ssr
+      ? await bundleSeparate(
+          separateServer,
+          externals,
+          config,
+          fedOptions,
+          'node'
+        )
+      : [];
 
     sharedPackageInfoCache = [
       ...sharedPackageInfoBrowser,

libs/native-federation-core/src/lib/core/federation-options.ts

@@ -8,6 +8,7 @@ export interface FederationOptions {
   verbose?: boolean;
   dev?: boolean;
   watch?: boolean;
+  ssr?: boolean;
   packageJson?: string;
   entryPoint?: string;
   buildNotifications?: BuildNotificationOptions;

libs/native-federation/src/builders/build/builder.ts

@@ -204,6 +204,7 @@ export async function* runBuilder(
     verbose: options.verbose,
     watch: false, // options.watch,
     dev: !!nfOptions.dev,
+    ssr: !!nfOptions.ssr,
     entryPoint,
     buildNotifications: nfOptions.buildNotifications,
   };