refactor: drop old arch and cpp templates (#818)

## Summarry

The large number of templates makes it difficult to maintain and test.
so this reduces the number of templates:

- Drop old architecture templates - users can use codegen or older
version of crnl
- Drop cpp templates - our cpp template isn't a pure cpp template, we
should eventually have it

## Test plan

Tested building each template: turbo module, fabric view, nitro module
and ran the example app for Android & iOS to verify it works.

- Nitro fails locally on iOS due to this
mrousavy/nitro#422, so had to force the iOS
version to make it work
- Turbo module works fine locally on iOS but fails on CI

Both of them seem related to XCode 16 and not this change.

Author: satya164

.github/workflows/build-templates.yml

@@ -30,35 +30,19 @@ jobs:
           - ubuntu
           - macos
         type:
-          - turbo-module
-          - fabric-view
-          - legacy-module
-          - legacy-view
-          - nitro-module
-        language:
-          - kotlin-objc
-          - kotlin-swift
-          - cpp
-        exclude:
-          - type: turbo-module
-            language: kotlin-swift
-          - type: fabric-view
-            language: kotlin-swift
-          - type: fabric-view
-            language: cpp
-          - type: legacy-view
-            language: cpp
-          - type: nitro-module
+          - name: turbo-module
             language: kotlin-objc
-          - type: nitro-module
-            language: cpp
+          - name: fabric-view
+            language: kotlin-objc
+          - name: nitro-module
+            language: kotlin-swift
         include:
           - os: ubuntu
-            type: library
-            language: js
+            type.name: library
+            type.language: js
 
     concurrency:
-      group: ${{ github.workflow }}-${{ github.ref }}-${{ matrix.os }}-${{ matrix.type }}-${{ matrix.language }}
+      group: ${{ github.workflow }}-${{ github.ref }}-${{ matrix.os }}-${{ matrix.type.name }}-${{ matrix.type.language }}
       cancel-in-progress: true
 
     runs-on: ${{ matrix.os }}-latest
@@ -76,7 +60,7 @@ jobs:
 
       - name: Get working directory
         run: |
-          echo "work_dir=${{ matrix.os }}-${{ matrix.type }}-${{ matrix.language }}" >> $GITHUB_ENV
+          echo "work_dir=${{ matrix.os }}-${{ matrix.type.name }}-${{ matrix.type.language }}" >> $GITHUB_ENV
 
       - name: Create library
         run: |
@@ -88,9 +72,9 @@ jobs:
             --author-email test@test \
             --author-url https://test.test \
             --repo-url https://test.test \
-            --type ${{ matrix.type }} \
-            --languages ${{ matrix.language }} \
-            --example ${{ matrix.language == 'js' && 'expo' || 'vanilla' }} \
+            --type ${{ matrix.type.name }} \
+            --languages ${{ matrix.type.language }} \
+            --example ${{ matrix.type.language == 'js' && 'expo' || 'vanilla' }} \
             --no-local
 
       - name: Restore dependencies of library
@@ -135,14 +119,14 @@ jobs:
         run: |
           # Build Android for only some matrices to skip redundant builds
           if [[ ${{ matrix.os }} == ubuntu ]]; then
-            if [[ ${{ matrix.type }} == *-view && ${{ matrix.language }} == *-objc ]] || [[ ${{ matrix.type }} == *-module && ${{ matrix.language }} == *-objc ]] || [[ ${{ matrix.type }} == *-module && ${{ matrix.language }} == cpp ]]; then
+            if [[ ${{ matrix.type.name }} == *-view && ${{ matrix.type.language }} == *-objc ]] || [[ ${{ matrix.type.name }} == *-module && ${{ matrix.type.language }} == *-objc ]]; then
               echo "android_build=1" >> $GITHUB_ENV
             fi
           fi
 
           # Build iOS for only some matrices to skip redundant builds
           if [[ ${{ matrix.os }} == macos ]]; then
-            if [[ ${{ matrix.type }} == *-view && ${{ matrix.language }} == kotlin-* ]] || [[ ${{ matrix.type }} == *-module && ${{ matrix.language }} == kotlin-* ]] || [[ ${{ matrix.type }} == *-module && ${{ matrix.language }} == cpp ]]; then
+            if [[ ${{ matrix.type.name }} == *-view && ${{ matrix.type.language }} == kotlin-* ]] || [[ ${{ matrix.type.name }} == *-module && ${{ matrix.type.language }} == kotlin-* ]]; then
               echo "ios_build=1" >> $GITHUB_ENV
             fi
           fi
@@ -153,9 +137,9 @@ jobs:
         with:
           path: |
             ${{ env.work_dir }}/.turbo
-          key: ${{ runner.os }}-library-turborepo-${{ matrix.type }}-${{ matrix.language }}-${{ hashFiles(format('{0}/yarn.lock', env.work_dir)) }}
+          key: ${{ runner.os }}-library-turborepo-${{ matrix.type.name }}-${{ matrix.type.language }}-${{ hashFiles(format('{0}/yarn.lock', env.work_dir)) }}
           restore-keys: |
-            ${{ runner.os }}-library-turborepo-${{ matrix.type }}-${{ matrix.language }}-
+            ${{ runner.os }}-library-turborepo-${{ matrix.type.name }}-${{ matrix.type.language }}-
 
       - name: Check turborepo cache
         if: env.android_build == 1 || env.ios_build == 1
@@ -194,7 +178,7 @@ jobs:
 
       - name: Build example (Web)
         working-directory: ${{ env.work_dir }}
-        if: matrix.language == 'js'
+        if: matrix.type.language == 'js'
         run: |
           yarn example expo export --platform web
 

docs/pages/create.md

@@ -29,6 +29,8 @@ This will ask you a few questions about your project and generate a new project
 
 After the project is created, you can find the development workflow in the generated `CONTRIBUTING.md` file.
 
+> Note: If you want to create a library using the legacy native modules and view APIs instead of the new architecture, you can use the `0.49.8` version of `create-react-native-library`: `npx create-react-native-library@0.49.8 awesome-library`.
+
 ## Local library
 
 While the default templates are for libraries that are published to npm, you can also create a local library that is not published but used locally in your app.

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

@@ -261,39 +261,33 @@ export default async function generateExampleApp({
       'android.enableJetifier=false'
     );
 
-    // If the library is on new architecture, enable new arch for iOS and Android
-    if (config.project.arch === 'new') {
-      // iOS
-      // Add ENV['RCT_NEW_ARCH_ENABLED'] = 1 on top of example/ios/Podfile
-      const podfile = await fs.readFile(
-        path.join(directory, 'ios', 'Podfile'),
-        'utf8'
-      );
+    // Enable new arch for iOS and Android
+    // iOS
+    // Add ENV['RCT_NEW_ARCH_ENABLED'] = 1 on top of example/ios/Podfile
+    const podfile = await fs.readFile(
+      path.join(directory, 'ios', 'Podfile'),
+      'utf8'
+    );
 
-      await fs.writeFile(
-        path.join(directory, 'ios', 'Podfile'),
-        "ENV['RCT_NEW_ARCH_ENABLED'] = '1'\n\n" + podfile
-      );
+    await fs.writeFile(
+      path.join(directory, 'ios', 'Podfile'),
+      "ENV['RCT_NEW_ARCH_ENABLED'] = '1'\n\n" + podfile
+    );
 
-      // Android
-      // Make sure newArchEnabled=true is present in android/gradle.properties
-      if (gradleProperties.split('\n').includes('#newArchEnabled=true')) {
-        gradleProperties = gradleProperties.replace(
-          '#newArchEnabled=true',
-          'newArchEnabled=true'
-        );
-      } else if (
-        gradleProperties.split('\n').includes('newArchEnabled=false')
-      ) {
-        gradleProperties = gradleProperties.replace(
-          'newArchEnabled=false',
-          'newArchEnabled=true'
-        );
-      } else if (
-        !gradleProperties.split('\n').includes('newArchEnabled=true')
-      ) {
-        gradleProperties += '\nnewArchEnabled=true';
-      }
+    // Android
+    // Make sure newArchEnabled=true is present in android/gradle.properties
+    if (gradleProperties.split('\n').includes('#newArchEnabled=true')) {
+      gradleProperties = gradleProperties.replace(
+        '#newArchEnabled=true',
+        'newArchEnabled=true'
+      );
+    } else if (gradleProperties.split('\n').includes('newArchEnabled=false')) {
+      gradleProperties = gradleProperties.replace(
+        'newArchEnabled=false',
+        'newArchEnabled=true'
+      );
+    } else if (!gradleProperties.split('\n').includes('newArchEnabled=true')) {
+      gradleProperties += '\nnewArchEnabled=true';
     }
 
     await fs.writeFile(

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

@@ -18,13 +18,11 @@ export type ArgName =
   | 'example'
   | 'reactNativeVersion';
 
-export type ProjectLanguages = 'kotlin-objc' | 'kotlin-swift' | 'cpp' | 'js';
+export type ProjectLanguages = 'kotlin-objc' | 'kotlin-swift' | 'js';
 
 export type ProjectType =
   | 'turbo-module'
   | 'fabric-view'
-  | 'legacy-module'
-  | 'legacy-view'
   | 'nitro-module'
   | 'library';
 
@@ -36,17 +34,12 @@ const LANGUAGE_CHOICES: {
   {
     title: 'Kotlin & Swift',
     value: 'kotlin-swift',
-    types: ['nitro-module', 'legacy-module', 'legacy-view'],
+    types: ['nitro-module'],
   },
   {
     title: 'Kotlin & Objective-C',
     value: 'kotlin-objc',
-    types: ['turbo-module', 'fabric-view', 'legacy-module', 'legacy-view'],
-  },
-  {
-    title: 'C++ for Android & iOS',
-    value: 'cpp',
-    types: ['turbo-module', 'legacy-module'],
+    types: ['turbo-module', 'fabric-view'],
   },
   {
     title: 'JavaScript for Android, iOS & Web',
@@ -101,16 +94,6 @@ const TYPE_CHOICES: {
     description:
       'type-safe, fast integration for native APIs to JS (experimental)',
   },
-  {
-    title: 'Legacy Native module',
-    value: 'legacy-module',
-    description: 'bridge for native APIs to JS (old architecture)',
-  },
-  {
-    title: 'Legacy Native view',
-    value: 'legacy-view',
-    description: 'bridge for native views to JS (old architecture)',
-  },
   {
     title: 'JavaScript library',
     value: 'library',
@@ -167,7 +150,6 @@ export const acceptedArgs: Record<ArgName, yargs.Options> = {
 } as const;
 
 export type Args = Record<ArgName | 'name', string>;
-export type SupportedArchitecture = 'new' | 'legacy';
 export type ExampleApp = 'none' | 'test-app' | 'expo' | 'vanilla';
 
 export type Answers = {