feat: use Yarn v3 when creating new project

packages/cli-tools/src/executeCommand.ts

@@ -0,0 +1,16 @@
+import execa from 'execa';
+import {logger} from '@react-native-community/cli-tools';
+
+function executeCommand(
+  command: string,
+  args: string[],
+  root?: string,
+  silent?: boolean,
+) {
+  return execa(command, args, {
+    stdio: silent && !logger.isVerbose() ? 'pipe' : 'inherit',
+    cwd: root,
+  });
+}
+
+export default executeCommand;

packages/cli-tools/src/index.ts

@@ -17,5 +17,6 @@ export {default as handlePortUnavailable} from './handlePortUnavailable';
 export * from './port';
 export {default as cacheManager} from './cacheManager';
 export {default as runSudo} from './runSudo';
+export {default as executeCommand} from './executeCommand';
 
 export * from './errors';

packages/cli/src/commands/init/init.ts

@@ -12,6 +12,7 @@ import {
   getLoader,
   Loader,
   cacheManager,
+  executeCommand,
 } from '@react-native-community/cli-tools';
 import {installPods} from '@react-native-community/cli-platform-ios';
 import {
@@ -28,6 +29,7 @@ import {getBunVersionIfAvailable} from '../../tools/bun';
 import {getNpmVersionIfAvailable} from '../../tools/npm';
 import {getYarnVersionIfAvailable} from '../../tools/yarn';
 import {createHash} from 'crypto';
+import semver from 'semver';
 
 const DEFAULT_VERSION = 'latest';
 
@@ -56,6 +58,33 @@ interface TemplateOptions {
   installCocoaPods?: string | boolean;
 }
 
+const YARN_VERSION = '3.6.4';
+
+const bumpYarnVersion = async (silent: boolean, root: string) => {
+  try {
+    let yarnVersion = semver.parse(getYarnVersionIfAvailable());
+    if (yarnVersion && semver.major(yarnVersion) === 1) {
+      await executeCommand(
+        'yarn',
+        ['set', 'version', YARN_VERSION],
+        root,
+        silent,
+      );
+
+      // React Native doesn't support PnP, so we need to set nodeLinker to node-modules. Read more here: https://github.com/react-native-community/cli/issues/27#issuecomment-1772626767
+
+      await executeCommand(
+        'yarn',
+        ['config', 'set', 'nodeLinker', 'node-modules'],
+        root,
+        silent,
+      );
+    }
+  } catch (e) {
+    logger.debug(e as string);
+  }
+};
+
 function doesDirectoryExist(dir: string) {
   return fs.existsSync(dir);
 }
@@ -168,6 +197,10 @@ async function createFromTemplate({
       packageName,
     });
 
+    if (packageManager === 'yarn') {
+      await bumpYarnVersion(false, projectDirectory);
+    }
+
     loader.succeed();
     const {postInitScript} = templateConfig;
     if (postInitScript) {

packages/cli/src/tools/packageManager.ts

@@ -1,5 +1,4 @@
-import execa from 'execa';
-import {logger} from '@react-native-community/cli-tools';
+import {executeCommand} from '@react-native-community/cli-tools';
 import {getYarnVersionIfAvailable, isProjectUsingYarn} from './yarn';
 import {getBunVersionIfAvailable, isProjectUsingBun} from './bun';
 import {getNpmVersionIfAvailable, isProjectUsingNpm} from './npm';
@@ -48,18 +47,7 @@ function configurePackageManager(
 
   const [executable, ...flags] = packageManagers[pm][action];
   const args = [executable, ...flags, ...packageNames];
-  return executeCommand(pm, args, options);
-}
-
-function executeCommand(
-  command: string,
-  args: Array<string>,
-  options: Options,
-) {
-  return execa(command, args, {
-    stdio: options.silent && !logger.isVerbose() ? 'pipe' : 'inherit',
-    cwd: options.root,
-  });
+  return executeCommand(pm, args, options.root, options.silent);
 }
 
 export function shouldUseYarn(options: Options) {