From 4fbc9fb9fd27ea416ff7745035af3e6cd3ac1664 Mon Sep 17 00:00:00 2001
From: Pieter De Baets <pieterdb@meta.com>
Date: Fri, 25 Sep 2026 03:59:58 -0700
Subject: [PATCH] Exclude generated files from repository formatting (#58645)

Summary:
Pull Request resolved: https://github.com/react/react-native/pull/58645

Prevent repository-wide formatting commands from rewriting internal-only sources and generated renderer implementations.

Changelog: [Internal]

Differential Revision: D121200839
---
 .clang-format-ignore     |  1 +
 .prettierignore          |  7 +++++++
 scripts/format-java.js   |  1 +
 scripts/format-kotlin.js |  1 +
 scripts/format-python.js | 13 +++++++++++++
 scripts/format-swift.js  |  7 ++++++-
 6 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/.clang-format-ignore b/.clang-format-ignore
index 8d232f8c190b..5f3620f21d50 100644
--- a/.clang-format-ignore
+++ b/.clang-format-ignore
@@ -1,5 +1,6 @@
 **/Pods/**
 **/build/**
+**/metainternal/**
 **/node_modules/**
 packages/react-native/React/I18n/FBXXHashUtils.h
 packages/react-native/ReactAndroid/src/main/jni/first-party/yogajni/**
diff --git a/.prettierignore b/.prettierignore
index a2c77e3527d0..2c9d8e9bc2e5 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,12 +1,19 @@
 # Ignore Pods
 **/Pods
+**/metainternal/**
 
 # Ignore hermes as it is downloaded from the react_native_pods
 **/sdks/hermes
 **/sdks/downloads
 
+flow-typed/npm/**
 packages/*/dist
 vendor
 packages/**/types_generated/
+packages/react-native/ReactNativeApi.d.ts
+packages/react-native/Libraries/Renderer/**
+packages/react-native/src/private/featureflags/ReactNativeFeatureFlags.js
+packages/react-native-babel-preset/src/__tests__/__fixtures__/output/**
+private/eslint-plugin-monorepo/rules/sort-imports.js
 
 packages/react-native-codegen/e2e/__test_fixtures__/modules/NativeEnumTurboModule.js
diff --git a/scripts/format-java.js b/scripts/format-java.js
index d991b6b38922..cba29c9af176 100644
--- a/scripts/format-java.js
+++ b/scripts/format-java.js
@@ -25,6 +25,7 @@ const IGNORE = [
   '**/Pods/**',
   '**/build/**',
   '**/com/facebook/yoga/**',
+  '**/metainternal/**',
   '**/node_modules/**',
 ];
 
diff --git a/scripts/format-kotlin.js b/scripts/format-kotlin.js
index 9879f9bcbf97..9e42ec8c9dd6 100644
--- a/scripts/format-kotlin.js
+++ b/scripts/format-kotlin.js
@@ -27,6 +27,7 @@ const IGNORE = [
   '**/com/facebook/yoga/**',
   '**/hermes-engine/**',
   '**/internal/featureflags/**',
+  '**/metainternal/**',
   '**/node_modules/**',
   '**/systeminfo/ReactNativeVersion.kt',
 ];
diff --git a/scripts/format-python.js b/scripts/format-python.js
index ba7dcb745ca9..a358e701cd1d 100644
--- a/scripts/format-python.js
+++ b/scripts/format-python.js
@@ -17,6 +17,11 @@ const path = require('node:path');
 
 const REPO_ROOT = path.resolve(__dirname, '..');
 const RUFF_VERSION = '0.14.0';
+// Passed to Ruff as `--config <inline TOML>`, which overrides only this single
+// setting and leaves any discovered configuration files in place. The
+// `--exclude` flag cannot be used instead: it replaces Ruff's default
+// exclusions (`node_modules`, `build`, …) rather than adding to them.
+const RUFF_CONFIG = 'extend-exclude = ["**/metainternal/**"]';
 const RUFF_ROOT = path.join(
   REPO_ROOT,
   'node_modules',
@@ -99,7 +104,12 @@ function runRuff(command, prefixArguments, check) {
   }
   const format = run(command, [
     ...prefixArguments,
+    '--config',
+    RUFF_CONFIG,
     'format',
+    // Ruff ignores RUFF_CONFIG's exclusions for any path named explicitly on
+    // the command line unless exclusions are forced.
+    '--force-exclude',
     ...(check ? ['--check'] : []),
     '.',
   ]);
@@ -193,7 +203,10 @@ function main() {
       ...python.prefixArguments,
       '-m',
       'ruff',
+      '--config',
+      RUFF_CONFIG,
       'format',
+      '--force-exclude',
       ...(check ? ['--check'] : []),
       '.',
     ],
diff --git a/scripts/format-swift.js b/scripts/format-swift.js
index 74885bd7d79d..c944d98311d0 100644
--- a/scripts/format-swift.js
+++ b/scripts/format-swift.js
@@ -27,7 +27,12 @@ const MINIMUM_SWIFT_FORMAT_MAJOR = 6;
 const MINIMUM_SWIFT_FORMAT_MINOR = 3;
 const MAX_FILES_PER_PROCESS = 100;
 const MAX_HEADER_BYTES = 4096;
-const IGNORE = ['**/Pods/**', '**/build/**', '**/node_modules/**'];
+const IGNORE = [
+  '**/Pods/**',
+  '**/build/**',
+  '**/metainternal/**',
+  '**/node_modules/**',
+];
 
 function isGenerated(file) {
   let fd;