From ba2214e571268a2e826f7ccec6a32e59d7a911d0 Mon Sep 17 00:00:00 2001
From: Jack Pope <jackpope1@gmail.com>
Date: Mon, 29 Sep 2025 20:40:24 -0400
Subject: [PATCH] Apply build script changes for RN to main (#34640)

This was merged into the 19.1.1 patch release branch in
https://github.com/facebook/react/pull/33972 but we never upstreamed it
to main. This should merge to main to make it easier to sync versions to
RN after future releases.

---------

Co-authored-by: Riccardo Cipolleschi <cipolleschi@meta.com>
---
 scripts/rollup/build-all-release-channels.js | 55 ++++++++------------
 1 file changed, 23 insertions(+), 32 deletions(-)

diff --git a/scripts/rollup/build-all-release-channels.js b/scripts/rollup/build-all-release-channels.js
index 8c1ca3ced1baf..47d3ac9d3e4a7 100644
--- a/scripts/rollup/build-all-release-channels.js
+++ b/scripts/rollup/build-all-release-channels.js
@@ -231,9 +231,16 @@ function processStable(buildDir) {
     }
 
     if (fs.existsSync(buildDir + '/react-native')) {
-      updatePlaceholderReactVersionInCompiledArtifactsFb(
+      updatePlaceholderReactVersionInCompiledArtifacts(
         buildDir + '/react-native',
-        rnVersionString
+        rnVersionString,
+        filename => filename.endsWith('.fb.js')
+      );
+
+      updatePlaceholderReactVersionInCompiledArtifacts(
+        buildDir + '/react-native',
+        ReactVersion,
+        filename => !filename.endsWith('.fb.js') && filename.endsWith('.js')
       );
     }
 
@@ -340,9 +347,16 @@ function processExperimental(buildDir, version) {
   }
 
   if (fs.existsSync(buildDir + '/react-native')) {
-    updatePlaceholderReactVersionInCompiledArtifactsFb(
+    updatePlaceholderReactVersionInCompiledArtifacts(
       buildDir + '/react-native',
-      rnVersionString
+      rnVersionString,
+      filename => filename.endsWith('.fb.js')
+    );
+
+    updatePlaceholderReactVersionInCompiledArtifacts(
+      buildDir + '/react-native',
+      ReactVersion,
+      filename => !filename.endsWith('.fb.js') && filename.endsWith('.js')
     );
   }
 
@@ -437,38 +451,15 @@ function updatePackageVersions(
 
 function updatePlaceholderReactVersionInCompiledArtifacts(
   artifactsDirectory,
-  newVersion
+  newVersion,
+  filteringClosure
 ) {
   // Update the version of React in the compiled artifacts by searching for
   // the placeholder string and replacing it with a new one.
-  const artifactFilenames = String(
-    spawnSync('grep', [
-      '-lr',
-      PLACEHOLDER_REACT_VERSION,
-      '--',
-      artifactsDirectory,
-    ]).stdout
-  )
-    .trim()
-    .split('\n')
-    .filter(filename => filename.endsWith('.js'));
-
-  for (const artifactFilename of artifactFilenames) {
-    const originalText = fs.readFileSync(artifactFilename, 'utf8');
-    const replacedText = originalText.replaceAll(
-      PLACEHOLDER_REACT_VERSION,
-      newVersion
-    );
-    fs.writeFileSync(artifactFilename, replacedText);
+  if (filteringClosure == null) {
+    filteringClosure = filename => filename.endsWith('.js');
   }
-}
 
-function updatePlaceholderReactVersionInCompiledArtifactsFb(
-  artifactsDirectory,
-  newVersion
-) {
-  // Update the version of React in the compiled artifacts by searching for
-  // the placeholder string and replacing it with a new one.
   const artifactFilenames = String(
     spawnSync('grep', [
       '-lr',
@@ -479,7 +470,7 @@ function updatePlaceholderReactVersionInCompiledArtifactsFb(
   )
     .trim()
     .split('\n')
-    .filter(filename => filename.endsWith('.fb.js'));
+    .filter(filteringClosure);
 
   for (const artifactFilename of artifactFilenames) {
     const originalText = fs.readFileSync(artifactFilename, 'utf8');