fix: don't hardcode mixed template to run with new architecture

Author: satya164

packages/create-react-native-library/src/index.ts

@@ -476,7 +476,7 @@ async function create(argv: yargs.Arguments<any>) {
     type: example,
     dest: folder,
     projectName: options.project.name,
-    isNewArch: options.project.turbomodule,
+    architecture,
   });
 
   spinner.text = 'Copying files';

packages/create-react-native-library/src/utils/generateExampleApp.ts

@@ -35,12 +35,12 @@ export default async function generateExampleApp({
   type,
   dest,
   projectName,
-  isNewArch,
+  architecture,
 }: {
   type: 'expo' | 'native';
   dest: string;
   projectName: string;
-  isNewArch: boolean;
+  architecture: 'turbo' | 'mixed' | 'legacy';
 }) {
   const directory = path.join(dest, 'example');
   const args =
@@ -97,7 +97,7 @@ export default async function generateExampleApp({
 
   // Temporary until autolinking is fixed on iOS
   // https://github.com/facebook/react-native/commit/a5622165c198ac6e7ffff5883d4f269a2c974f2e
-  if (isNewArch) {
+  if (architecture === 'turbo' || architecture === 'mixed') {
     scripts.postinstall = 'patch-package';
 
     Object.assign(devDependencies, PACKAGES_TO_ADD_NEW_ARCH);
@@ -109,7 +109,7 @@ export default async function generateExampleApp({
   );
 
   // If the library is on new architecture, enable new arch for iOS and Android
-  if (isNewArch) {
+  if (architecture === 'turbo') {
     // Android
     // Change newArchEnabled=false to newArchEnabled=true in example/android/gradle.properties
     const gradleProperties = await fs.readFile(

packages/create-react-native-library/templates/common/CONTRIBUTING.md

@@ -35,10 +35,21 @@ yarn example ios
 ```
 
 <% if (project.architecture == 'mixed') { -%>
-By default, the example is configured to build with the new architecture. To build with the old architecture, you can change the following:
+By default, the example is configured to build with the old architecture. To run the example with the new architecture, you can do the following:
+
+1. For Android, run:
+
+   ```sh
+   ORG_GRADLE_PROJECT_newArchEnabled=true yarn example android
+   ```
+
+2. For iOS, run:
+
+   ```sh
+   RCT_NEW_ARCH_ENABLED=1 yarn example pods
+   yarn example ios
+   ```
 
-1. For Android, change `newArchEnabled=true` to `newArchEnabled=false` in `example/android/gradle.properties`.
-2. For iOS, change `ENV['RCT_NEW_ARCH_ENABLED'] = '1'` to `ENV['RCT_NEW_ARCH_ENABLED'] = '0'` in `example/ios/Podfile`.
 <% } -%>
 <% if (!project.native) { -%>
 To run the example app on Web: