react · cortinico · Sep 11, 2026 · Sep 11, 2026 · Sep 11, 2026 · Sep 11, 2026
diff --git a/.clang-format-ignore b/.clang-format-ignore
@@ -1,3 +1,6 @@
+**/Pods/**
+**/build/**
+**/node_modules/**
 packages/react-native/React/I18n/FBXXHashUtils.h
 packages/react-native/ReactAndroid/src/main/jni/first-party/yogajni/**
 packages/react-native/ReactAndroid/src/main/jni/third-party/**

diff --git a/build.gradle.kts b/build.gradle.kts
@@ -13,7 +13,6 @@ plugins {
   alias(libs.plugins.kotlin.android) apply false
   alias(libs.plugins.binary.compatibility.validator) apply true
   alias(libs.plugins.android.test) apply false
-  alias(libs.plugins.ktfmt) apply true
 }
 
 val reactAndroidProperties = java.util.Properties()
@@ -176,42 +175,3 @@ if (hermesSubstitution != null) {
     }
   }
 }
-
-ktfmt {
-  blockIndent.set(2)
-  continuationIndent.set(4)
-  maxWidth.set(100)
-  removeUnusedImports.set(false)
-  manageTrailingCommas.set(false)
-}
-
-// Configure ktfmt tasks to include gradle-plugin
-listOf("ktfmtCheck", "ktfmtFormat").forEach { taskName ->
-  tasks.named(taskName) { dependsOn(gradle.includedBuild("gradle-plugin").task(":$taskName")) }
-}
-
-allprojects {
-  // Apply exclusions for specific files that should not be formatted
-  val excludePatterns = listOf(
-      "**/build/**",
-      "**/hermes-engine/**",
-      "**/internal/featureflags/**",
-      "**/systeminfo/ReactNativeVersion.kt",
-  )
-  listOf(
-      com.ncorti.ktfmt.gradle.tasks.KtfmtCheckTask::class,
-      com.ncorti.ktfmt.gradle.tasks.KtfmtFormatTask::class,
-  )
-      .forEach { tasks.withType(it) { exclude(excludePatterns) } }
-
-  // Disable the problematic ktfmt script tasks due to symbolic link issues in subprojects
-  afterEvaluate {
-    listOf("ktfmtCheckScripts", "ktfmtFormatScripts").forEach {
-      tasks.findByName(it)?.enabled = false
-    }
-  }
-}
-
-// We intentionally disable the `ktfmtCheck` tasks as the formatting is primarly handled inside
-// fbsource
-allprojects { tasks.withType<com.ncorti.ktfmt.gradle.tasks.KtfmtCheckTask>() { enabled = false } }
diff --git a/package.json b/package.json
@@ -9,22 +9,26 @@
     "build-android": "./gradlew :packages:react-native:ReactAndroid:build",
     "build": "node ./scripts/build/build.js",
     "build-types": "node ./scripts/js-api/build-types",
-    "clang-format": "node ./scripts/clang-format.js",
     "clean": "node ./scripts/build/clean.js",
     "cxx-api-build": "python -m scripts.cxx-api.parser",
     "cxx-api-validate": "python -m scripts.cxx-api.parser --validate",
     "flow-check": "flow full-check",
     "flow": "flow",
-    "format-check": "prettier --list-different \"./**/*.{js,md,yml,ts,tsx}\"",
-    "format": "npm run prettier && npm run clang-format",
+    "format-check": "yarn format-check-javascript && yarn format-check-cpp && yarn format-check-kotlin && yarn format-check-java",
+    "format-check-cpp": "node ./scripts/clang-format.js --check",
+    "format-check-java": "node ./scripts/format-java.js --check",
+    "format-check-javascript": "prettier --check \"./**/*.{cjs,cts,flow,js,jsx,md,mjs,mts,ts,tsx,yaml,yml}\"",
+    "format-check-kotlin": "node ./scripts/format-kotlin.js --check",
+    "format": "yarn format-javascript && yarn format-cpp && yarn format-kotlin && yarn format-java",
+    "format-cpp": "node ./scripts/clang-format.js",
+    "format-java": "node ./scripts/format-java.js",
+    "format-javascript": "prettier --write \"./**/*.{cjs,cts,flow,js,jsx,md,mjs,mts,ts,tsx,yaml,yml}\"",
+    "format-kotlin": "node ./scripts/format-kotlin.js",
     "featureflags": "yarn --cwd packages/react-native featureflags",
     "js-api-diff": "node ./scripts/js-api/diff-api-snapshot",
-    "lint-kotlin-check": "./gradlew ktfmtCheck",
-    "lint-kotlin": "./gradlew ktfmtFormat",
     "lint-markdown": "markdownlint-cli2 2>&1",
     "lint": "eslint --max-warnings 0 .",
     "preinstall": "node ./scripts/try-set-hermes-compiler-prebuilt.js",
-    "prettier": "prettier --write \"./**/*.{js,md,yml,ts,tsx}\"",
     "shellcheck": "./.github/workflow-scripts/analyze_scripts.sh",
     "start": "yarn --cwd packages/rn-tester start",
     "set-version": "node ./scripts/releases/set-version.js",
@@ -91,6 +95,7 @@
     "flow-eslint": "0.331.0",
     "flow-parser": "0.331.0",
     "flow-transform": "0.331.0",
+    "google-java-format": "1.4.0",
     "ini": "^5.0.0",
     "inquirer": "^7.1.0",
     "jest": "^29.7.0",
@@ -99,6 +104,7 @@
     "jest-junit": "^16.0.0",
     "jest-snapshot": "^29.7.0",
     "jsonc-parser": "2.2.1",
+    "ktfmt": "0.59.0",
     "markdownlint-cli2": "^0.17.2",
     "markdownlint-rule-relative-links": "^3.0.0",
     "memfs": "^4.38.2",

diff --git a/packages/gradle-plugin/build.gradle.kts b/packages/gradle-plugin/build.gradle.kts
@@ -7,7 +7,6 @@
 
 plugins {
   alias(libs.plugins.kotlin.jvm).apply(false)
-  alias(libs.plugins.ktfmt).apply(true)
 }
 
 tasks.register("build") {
@@ -27,25 +26,3 @@ tasks.register("clean") {
       ":shared:clean",
   )
 }
-
-tasks.named("ktfmtCheck") {
-  dependsOn(
-      ":react-native-gradle-plugin:ktfmtCheck",
-      ":settings-plugin:ktfmtCheck",
-      ":shared-testutil:ktfmtCheck",
-      ":shared:ktfmtCheck",
-  )
-}
-
-tasks.named("ktfmtFormat") {
-  dependsOn(
-      ":react-native-gradle-plugin:ktfmtFormat",
-      ":settings-plugin:ktfmtFormat",
-      ":shared-testutil:ktfmtFormat",
-      ":shared:ktfmtFormat",
-  )
-}
-
-// We intentionally disable the `ktfmtCheck` tasks as the formatting is primarly handled inside
-// fbsource
-allprojects { tasks.withType<com.ncorti.ktfmt.gradle.tasks.KtfmtCheckTask>() { enabled = false } }
diff --git a/packages/gradle-plugin/gradle/libs.versions.toml b/packages/gradle-plugin/gradle/libs.versions.toml
@@ -6,7 +6,6 @@ javapoet = "1.13.0"
 junit = "4.13.2"
 kotlin = "2.2.0"
 assertj = "3.25.1"
-ktfmt = "0.22.0"
 
 [libraries]
 kotlin-gradle-plugin = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.ref = "kotlin" }
@@ -19,4 +18,3 @@ assertj = { module = "org.assertj:assertj-core", version.ref = "assertj" }
 
 [plugins]
 kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
-ktfmt = { id = "com.ncorti.ktfmt.gradle", version.ref = "ktfmt" }
diff --git a/packages/gradle-plugin/react-native-gradle-plugin/build.gradle.kts b/packages/gradle-plugin/react-native-gradle-plugin/build.gradle.kts
@@ -12,7 +12,6 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
   alias(libs.plugins.kotlin.jvm)
-  alias(libs.plugins.ktfmt)
   id("java-gradle-plugin")
 }
 

diff --git a/packages/gradle-plugin/settings-plugin/build.gradle.kts b/packages/gradle-plugin/settings-plugin/build.gradle.kts
@@ -12,7 +12,6 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
   alias(libs.plugins.kotlin.jvm)
-  alias(libs.plugins.ktfmt)
   id("java-gradle-plugin")
 }
 

diff --git a/packages/gradle-plugin/shared-testutil/build.gradle.kts b/packages/gradle-plugin/shared-testutil/build.gradle.kts
@@ -12,7 +12,6 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
   alias(libs.plugins.kotlin.jvm)
-  alias(libs.plugins.ktfmt)
 }
 
 repositories { mavenCentral() }

diff --git a/packages/gradle-plugin/shared/build.gradle.kts b/packages/gradle-plugin/shared/build.gradle.kts
@@ -12,7 +12,6 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
   alias(libs.plugins.kotlin.jvm)
-  alias(libs.plugins.ktfmt)
 }
 
 repositories { mavenCentral() }

diff --git a/packages/react-native/ReactAndroid/build.gradle.kts b/packages/react-native/ReactAndroid/build.gradle.kts
@@ -18,7 +18,6 @@ plugins {
   id("com.facebook.react")
   alias(libs.plugins.android.library)
   alias(libs.plugins.download)
-  alias(libs.plugins.ktfmt)
 }
 
 version = project.findProperty("VERSION_NAME")?.toString()!!

diff --git a/packages/react-native/gradle/libs.versions.toml b/packages/react-native/gradle/libs.versions.toml
@@ -31,7 +31,6 @@ jsc-android = "2026004.0.1"
 jsr305 = "3.0.2"
 junit = "4.13.2"
 kotlin = "2.2.0"
-ktfmt = "0.22.0"
 mockito = "3.12.4"
 mockito-kotlin = "3.2.0"
 nexus-publish = "2.0.0"
@@ -97,7 +96,6 @@ thoughtworks = {module = "com.thoughtworks.xstream:xstream", version.ref = "xstr
 android-application = { id = "com.android.application", version.ref = "agp" }
 android-library = { id = "com.android.library", version.ref = "agp" }
 download = { id = "de.undercouch.download", version.ref = "download" }
-ktfmt = { id = "com.ncorti.ktfmt.gradle", version.ref = "ktfmt" }
 nexus-publish = { id = "io.github.gradle-nexus.publish-plugin", version.ref = "nexus-publish" }
 kotlin-android = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
 binary-compatibility-validator = { id = "org.jetbrains.kotlinx.binary-compatibility-validator", version.ref = "binary-compatibility-validator" }

diff --git a/scripts/clang-format.js b/scripts/clang-format.js
@@ -10,18 +10,49 @@
 
 'use strict';
 
-const dotslash = require('fb-dotslash');
 const {spawnSync} = require('node:child_process');
 const fs = require('node:fs');
 const path = require('node:path');
 const {globSync} = require('tinyglobby');
 
 const REPO_ROOT = path.resolve(__dirname, '..');
-const CLANG_FORMAT = path.join(__dirname, 'clang-format');
+const OSS_CLANG_FORMAT_DOTSLASH = path.join(__dirname, 'clang-format');
 const GENERATED_MARKER = Buffer.from('@' + 'generated');
+const IGNORE_FILE = path.join(REPO_ROOT, '.clang-format-ignore');
 const MAX_HEADER_BYTES = 4096;
 const MAX_FILES_PER_PROCESS = 30;
 
+const SOURCE_GLOB = '**/*.{c,cc,cpp,cu,cuh,cxx,h,hh,hpp,hxx,m,mm,proto,tcc}';
+
+function findClangFormat() {
+  if (process.env.CLANG_FORMAT != null && process.env.CLANG_FORMAT !== '') {
+    return {command: process.env.CLANG_FORMAT, prefixArguments: []};
+  }
+
+  try {
+    const metaClangFormat = require('./clang-format.fb').findMetaClangFormat();
+    if (metaClangFormat != null) {
+      return metaClangFormat;
+    }
+  } catch (error) {
+    if (
+      error == null ||
+      error.code !== 'MODULE_NOT_FOUND' ||
+      !String(error.message).includes("'./clang-format.fb'")
+    ) {
+      throw error;
+    }
+  }
+
+  return {
+    command:
+      process.env.DOTSLASH != null && process.env.DOTSLASH !== ''
+        ? process.env.DOTSLASH
+        : require('fb-dotslash'),
+    prefixArguments: [OSS_CLANG_FORMAT_DOTSLASH],
+  };
+}
+
 /** @param {string} file */
 function isGenerated(file) {
   let fd;
@@ -41,16 +72,33 @@ function isGenerated(file) {
 }
 
 function main() {
+  const arguments_ = process.argv.slice(2);
+  const check = arguments_.includes('--check');
+  const clangFormat = findClangFormat();
+  const positionalArguments = arguments_.filter(
+    argument => argument !== '--check',
+  );
+  const ignore = fs
+    .readFileSync(IGNORE_FILE, 'utf8')
+    .split('\n')
+    .map(line => line.trim())
+    .filter(line => line !== '' && !line.startsWith('#'));
+  const discoveredFiles = globSync(SOURCE_GLOB, {cwd: REPO_ROOT, ignore});
   const files =
-    process.argv.length > 2
-      ? process.argv.slice(2)
-      : globSync('*/**/*.{h,cpp,m,mm}', {cwd: REPO_ROOT});
+    positionalArguments.length > 0
+      ? positionalArguments.filter(file => discoveredFiles.includes(file))
+      : discoveredFiles;
   const sourceFiles = files.filter(file => !isGenerated(file));
+  let exitStatus = 0;
 
   for (let i = 0; i < sourceFiles.length; i += MAX_FILES_PER_PROCESS) {
+    const formatterArguments = [
+      ...(check ? ['--dry-run', '--Werror'] : ['-i']),
+      ...sourceFiles.slice(i, i + MAX_FILES_PER_PROCESS),
+    ];
     const result = spawnSync(
-      dotslash,
-      [CLANG_FORMAT, '-i', ...sourceFiles.slice(i, i + MAX_FILES_PER_PROCESS)],
+      clangFormat.command,
+      [...clangFormat.prefixArguments, ...formatterArguments],
       {
         cwd: REPO_ROOT,
         stdio: 'inherit',
@@ -61,13 +109,13 @@ function main() {
       throw result.error;
     }
     if (result.signal != null) {
-      process.kill(process.pid, result.signal);
-      return;
+      throw new Error(`clang-format was terminated by ${result.signal}`);
     }
     if (result.status !== 0) {
-      process.exit(result.status ?? 1);
+      exitStatus = result.status ?? 1;
     }
   }
+  process.exitCode = exitStatus;
 }
 
 main();