From 95113e9dfd0ee2c68b7e21b29ca6982f22647619 Mon Sep 17 00:00:00 2001
From: Tim Yung <yungsters@meta.com>
Date: Mon, 2 Jun 2025 08:40:55 -0700
Subject: [PATCH] RN: Default `featureflags` Script to Update (#51708)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/51708

Changes `yarn featureflags` to default to `--update` when no options are supplied.

Provides a way to display the available options with a new `--help` option.

Changelog:
[Internal]

Reviewed By: sammy-SC

Differential Revision: D75692119

fbshipit-source-id: 50d25c5f12c7646159872661c93ebe8c42f44788
---
 .../react-native/scripts/featureflags/index.js    | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/packages/react-native/scripts/featureflags/index.js b/packages/react-native/scripts/featureflags/index.js
index 14b12078685..c88a46560de 100644
--- a/packages/react-native/scripts/featureflags/index.js
+++ b/packages/react-native/scripts/featureflags/index.js
@@ -19,6 +19,11 @@ if (require.main === module) {
     command = 'verify-unchanged';
   } else if (process.argv.includes('--print')) {
     command = 'print';
+  } else if (process.argv.includes('--help')) {
+    command = 'help';
+  } else {
+    console.log('Defaulting to `--update`. See all options using `--help`.');
+    command = 'update';
   }
 
   switch (command) {
@@ -31,10 +36,12 @@ if (require.main === module) {
     case 'print':
       require('./print').default(process.argv.includes('--json'));
       break;
-    default:
-      console.error(
-        'Usage: node featureflags.js [--update|--verify-unchanged|--print]',
+    case 'help':
+      console.log(
+        'Usage: node featureflags.js [--update|--verify-unchanged|--print|--help]',
       );
-      process.exit(1);
+      break;
+    default:
+      throw new Error('Unexpected script execution.');
   }
 }