diff --git a/IntegrationTests/websocket_integration_test_server.js b/IntegrationTests/websocket_integration_test_server.js
index 763668f32..50a656871 100755
--- a/IntegrationTests/websocket_integration_test_server.js
+++ b/IntegrationTests/websocket_integration_test_server.js
@@ -7,6 +7,7 @@
  * LICENSE file in the root directory of this source tree.
  *
  * @flow
+ * @format
  */
 'use strict';
 
@@ -26,8 +27,8 @@ An incoming message of 'exit' will shut down the server.
 `);
 
 const server = new WebSocket.Server({port: 5555});
-server.on('connection', (ws) => {
-  ws.on('message', (message) => {
+server.on('connection', ws => {
+  ws.on('message', message => {
     console.log('Received message:', message);
     if (message === 'exit') {
       console.log('WebSocket integration test server exit');
diff --git a/RNTester/js/http_test_server.js b/RNTester/js/http_test_server.js
index 998d73dbf..c9a4be575 100755
--- a/RNTester/js/http_test_server.js
+++ b/RNTester/js/http_test_server.js
@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree.
  *
  * @flow
+ * @format
  */
 'use strict';
 
diff --git a/RNTester/js/websocket_test_server.js b/RNTester/js/websocket_test_server.js
index 3f3a23cfa..eacab9e21 100755
--- a/RNTester/js/websocket_test_server.js
+++ b/RNTester/js/websocket_test_server.js
@@ -6,6 +6,7 @@
  * LICENSE file in the root directory of this source tree.
  *
  * @flow
+ * @format
  */
 'use strict';
 
@@ -29,8 +30,8 @@ ArrayBuffer instead of a string.
 
 const respondWithBinary = process.argv.indexOf('--binary') !== -1;
 const server = new WebSocket.Server({port: 5555});
-server.on('connection', (ws) => {
-  ws.on('message', (message) => {
+server.on('connection', ws => {
+  ws.on('message', message => {
     console.log('Received message:', message);
     console.log('Cookie:', ws.upgradeReq.headers.cookie);
     if (respondWithBinary) {
diff --git a/local-cli/wrong-react-native.js b/local-cli/wrong-react-native.js
index 57f04fead..3b949818a 100755
--- a/local-cli/wrong-react-native.js
+++ b/local-cli/wrong-react-native.js
@@ -5,6 +5,8 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
+ *
+ * @format
  */
 
 const isWindows = process.platform === 'win32';
@@ -14,23 +16,28 @@ if (isWindows) {
   const fs = require('fs');
   const path = require('path');
   // On Windows, assume we are installed globally if we can't find a package.json above node_modules.
-  installedGlobally = !(fs.existsSync(path.join(__dirname, '../../../package.json')));
+  installedGlobally = !fs.existsSync(
+    path.join(__dirname, '../../../package.json'),
+  );
 } else {
   // On non-windows, assume we are installed globally if we are called from outside of the node_mobules/.bin/react-native executable.
   var script = process.argv[1];
   installedGlobally = script.indexOf('node_modules/.bin/react-native') === -1;
 }
 
-
 if (installedGlobally) {
   const chalk = require('chalk');
 
-  console.error([
-    chalk.red('Looks like you installed react-native globally, maybe you meant react-native-cli?'),
-    chalk.red('To fix the issue, run:'),
-    'npm uninstall -g react-native',
-    'npm install -g react-native-cli'
-  ].join('\n'));
+  console.error(
+    [
+      chalk.red(
+        'Looks like you installed react-native globally, maybe you meant react-native-cli?',
+      ),
+      chalk.red('To fix the issue, run:'),
+      'npm uninstall -g react-native',
+      'npm install -g react-native-cli',
+    ].join('\n'),
+  );
   process.exit(1);
 } else {
   require('./cli').run();
diff --git a/react-native-cli/index.js b/react-native-cli/index.js
index 5cde16496..fa8305070 100755
--- a/react-native-cli/index.js
+++ b/react-native-cli/index.js
@@ -5,6 +5,8 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
+ *
+ * @format
  */
 
 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -60,12 +62,7 @@ var semver = require('semver');
 var options = require('minimist')(process.argv.slice(2));
 
 var CLI_MODULE_PATH = function() {
-  return path.resolve(
-    process.cwd(),
-    'node_modules',
-    'react-native',
-    'cli.js'
-  );
+  return path.resolve(process.cwd(), 'node_modules', 'react-native', 'cli.js');
 };
 
 var REACT_NATIVE_PACKAGE_JSON_PATH = function() {
@@ -73,7 +70,7 @@ var REACT_NATIVE_PACKAGE_JSON_PATH = function() {
     process.cwd(),
     'node_modules',
     'react-native',
-    'package.json'
+    'package.json',
   );
 };
 
@@ -90,7 +87,9 @@ function getYarnVersionIfAvailable() {
     if (process.platform.startsWith('win')) {
       yarnVersion = (execSync('yarn --version 2> NUL').toString() || '').trim();
     } else {
-      yarnVersion = (execSync('yarn --version 2>/dev/null').toString() || '').trim();
+      yarnVersion = (
+        execSync('yarn --version 2>/dev/null').toString() || ''
+      ).trim();
     }
   } catch (error) {
     return null;
@@ -119,51 +118,51 @@ if (cli) {
   cli.run();
 } else {
   if (options._.length === 0 && (options.h || options.help)) {
-    console.log([
-      '',
-      '  Usage: react-native [command] [options]',
-      '',
-      '',
-      '  Commands:',
-      '',
-      '    init <ProjectName> [options]  generates a new project and installs its dependencies',
-      '',
-      '  Options:',
-      '',
-      '    -h, --help    output usage information',
-      '    -v, --version use a specific version of React Native',
-      '    --template use an app template. Use --template to see available templates.',
-      '',
-    ].join('\n'));
+    console.log(
+      [
+        '',
+        '  Usage: react-native [command] [options]',
+        '',
+        '',
+        '  Commands:',
+        '',
+        '    init <ProjectName> [options]  generates a new project and installs its dependencies',
+        '',
+        '  Options:',
+        '',
+        '    -h, --help    output usage information',
+        '    -v, --version use a specific version of React Native',
+        '    --template use an app template. Use --template to see available templates.',
+        '',
+      ].join('\n'),
+    );
     process.exit(0);
   }
 
   if (commands.length === 0) {
     console.error(
-      'You did not pass any commands, run `react-native --help` to see a list of all available commands.'
+      'You did not pass any commands, run `react-native --help` to see a list of all available commands.',
     );
     process.exit(1);
   }
 
   switch (commands[0]) {
-  case 'init':
-    if (!commands[1]) {
+    case 'init':
+      if (!commands[1]) {
+        console.error('Usage: react-native init <ProjectName> [--verbose]');
+        process.exit(1);
+      } else {
+        init(commands[1], options);
+      }
+      break;
+    default:
       console.error(
-        'Usage: react-native init <ProjectName> [--verbose]'
+        'Command `%s` unrecognized. ' +
+          'Make sure that you have run `npm install` and that you are inside a react-native project.',
+        commands[0],
       );
       process.exit(1);
-    } else {
-      init(commands[1], options);
-    }
-    break;
-  default:
-    console.error(
-      'Command `%s` unrecognized. ' +
-      'Make sure that you have run `npm install` and that you are inside a react-native project.',
-      commands[0]
-    );
-    process.exit(1);
-    break;
+      break;
   }
 }
 
@@ -172,7 +171,7 @@ function validateProjectName(name) {
     console.error(
       '"%s" is not a valid name for a project. Please use a valid identifier ' +
         'name (alphanumeric).',
-      name
+      name,
     );
     process.exit(1);
   }
@@ -181,7 +180,7 @@ function validateProjectName(name) {
     console.error(
       '"%s" is not a valid name for a project. Please do not use the ' +
         'reserved word "React".',
-      name
+      name,
     );
     process.exit(1);
   }
@@ -212,10 +211,10 @@ function createAfterConfirmation(name, options) {
     message: 'Directory ' + name + ' already exists. Continue?',
     validator: /y[es]*|n[o]?/,
     warning: 'Must respond yes or no',
-    default: 'no'
+    default: 'no',
   };
 
-  prompt.get(property, function (err, result) {
+  prompt.get(property, function(err, result) {
     if (result.yesno[0] === 'y') {
       createProject(name, options);
     } else {
@@ -231,7 +230,7 @@ function createProject(name, options) {
 
   console.log(
     'This will walk you through creating a new React Native project in',
-    root
+    root,
   );
 
   if (!fs.existsSync(root)) {
@@ -246,9 +245,12 @@ function createProject(name, options) {
       start: 'node node_modules/react-native/local-cli/cli.js start',
       ios: 'react-native run-ios',
       android: 'react-native run-android',
-    }
+    },
   };
-  fs.writeFileSync(path.join(root, 'package.json'), JSON.stringify(packageJson));
+  fs.writeFileSync(
+    path.join(root, 'package.json'),
+    JSON.stringify(packageJson),
+  );
   process.chdir(root);
 
   run(root, projectName, options);
@@ -269,7 +271,7 @@ function getInstallPackage(rnPackage) {
 function run(root, projectName, options) {
   var rnPackage = options.version; // e.g. '0.38' or '/path/to/archive.tgz'
   var forceNpmClient = options.npm;
-  var yarnVersion = (!forceNpmClient) && getYarnVersionIfAvailable();
+  var yarnVersion = !forceNpmClient && getYarnVersionIfAvailable();
   var installCommand;
   if (options.installCommand) {
     // In CI environments it can be useful to provide a custom command,
@@ -286,9 +288,12 @@ function run(root, projectName, options) {
     } else {
       console.log('Installing ' + getInstallPackage(rnPackage) + '...');
       if (!forceNpmClient) {
-        console.log('Consider installing yarn to make this faster: https://yarnpkg.com');
+        console.log(
+          'Consider installing yarn to make this faster: https://yarnpkg.com',
+        );
       }
-      installCommand = 'npm install --save --save-exact ' + getInstallPackage(rnPackage);
+      installCommand =
+        'npm install --save --save-exact ' + getInstallPackage(rnPackage);
       if (options.verbose) {
         installCommand += ' --verbose';
       }
@@ -312,13 +317,15 @@ function checkNodeVersion() {
     return;
   }
   if (!semver.satisfies(process.version, packageJson.engines.node)) {
-    console.error(chalk.red(
+    console.error(
+      chalk.red(
         'You are currently running Node %s but React Native requires %s. ' +
-        'Please use a supported version of Node.\n' +
-        'See https://facebook.github.io/react-native/docs/getting-started.html'
+          'Please use a supported version of Node.\n' +
+          'See https://facebook.github.io/react-native/docs/getting-started.html',
       ),
       process.version,
-      packageJson.engines.node);
+      packageJson.engines.node,
+    );
   }
 }
 
@@ -327,7 +334,9 @@ function printVersionsAndExit(reactNativePackageJsonPath) {
   try {
     console.log('react-native: ' + require(reactNativePackageJsonPath).version);
   } catch (e) {
-    console.log('react-native: n/a - not inside a React Native project directory');
+    console.log(
+      'react-native: n/a - not inside a React Native project directory',
+    );
   }
   process.exit();
 }
diff --git a/react-native-git-upgrade/index.js b/react-native-git-upgrade/index.js
index dea50c344..c5e927312 100644
--- a/react-native-git-upgrade/index.js
+++ b/react-native-git-upgrade/index.js
@@ -5,30 +5,34 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
+ *
+ * @format
  */
 
 var argv = require('minimist')(process.argv.slice(2));
 var cli = require('./cli');
 
 if (argv._.length === 0 && (argv.h || argv.help)) {
-  console.log([
-    '',
-    '  Usage: react-native-git-upgrade [version] [options]',
-    '',
-    '',
-    '  Commands:',
-    '',
-    '    [Version]     upgrades React Native and app templates to the desired version',
-    '                  (latest, if not specified)',
-    '',
-    '  Options:',
-    '',
-    '    -h, --help    output usage information',
-    '    -v, --version output the version number',
-    '    --verbose output debugging info',
-    '    --npm force using the npm client even if your project uses yarn',
-    '',
-  ].join('\n'));
+  console.log(
+    [
+      '',
+      '  Usage: react-native-git-upgrade [version] [options]',
+      '',
+      '',
+      '  Commands:',
+      '',
+      '    [Version]     upgrades React Native and app templates to the desired version',
+      '                  (latest, if not specified)',
+      '',
+      '  Options:',
+      '',
+      '    -h, --help    output usage information',
+      '    -v, --version output the version number',
+      '    --verbose output debugging info',
+      '    --npm force using the npm client even if your project uses yarn',
+      '',
+    ].join('\n'),
+  );
   process.exit(0);
 }
 
@@ -37,5 +41,4 @@ if (argv._.length === 0 && (argv.v || argv.version)) {
   process.exit(0);
 }
 
-cli.run(argv._[0], argv)
-  .catch(console.error);
+cli.run(argv._[0], argv).catch(console.error);
diff --git a/scripts/bump-oss-version.js b/scripts/bump-oss-version.js
index 11ac0f940..6af9eb227 100755
--- a/scripts/bump-oss-version.js
+++ b/scripts/bump-oss-version.js
@@ -4,6 +4,8 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
+ *
+ * @format
  */
 'use strict';
 
@@ -14,13 +16,7 @@
  * All you have to do is push changes to remote and CI will make a new build.
  */
 const fs = require('fs');
-const {
-  cat,
-  echo,
-  exec,
-  exit,
-  sed,
-} = require('shelljs');
+const {cat, echo, exec, exit, sed} = require('shelljs');
 
 const minimist = require('minimist');
 
@@ -30,7 +26,9 @@ let argv = minimist(process.argv.slice(2), {
 });
 
 // - check we are in release branch, e.g. 0.33-stable
-let branch = exec('git symbolic-ref --short HEAD', {silent: true}).stdout.trim();
+let branch = exec('git symbolic-ref --short HEAD', {
+  silent: true,
+}).stdout.trim();
 
 if (branch.indexOf('-stable') === -1) {
   echo('You must be in 0.XX-stable branch to bump a version');
@@ -44,14 +42,18 @@ let versionMajor = branch.slice(0, branch.indexOf('-stable'));
 // e.g. 0.33.1 or 0.33.0-rc4
 let version = argv._[0];
 if (!version || version.indexOf(versionMajor) !== 0) {
-  echo(`You must pass a tag like 0.${versionMajor}.[X]-rc[Y] to bump a version`);
+  echo(
+    `You must pass a tag like 0.${versionMajor}.[X]-rc[Y] to bump a version`,
+  );
   exit(1);
 }
 
 // Generate version files to detect mismatches between JS and native.
 let match = version.match(/^(\d+)\.(\d+)\.(\d+)(?:-(.+))?$/);
 if (!match) {
-  echo(`You must pass a correctly formatted version; couldn't parse ${version}`);
+  echo(
+    `You must pass a correctly formatted version; couldn't parse ${version}`,
+  );
   exit(1);
 }
 let [, major, minor, patch, prerelease] = match;
@@ -62,8 +64,11 @@ fs.writeFileSync(
     .replace('${major}', major)
     .replace('${minor}', minor)
     .replace('${patch}', patch)
-    .replace('${prerelease}', prerelease !== undefined ? `"${prerelease}"` : 'null'),
-  'utf-8'
+    .replace(
+      '${prerelease}',
+      prerelease !== undefined ? `"${prerelease}"` : 'null',
+    ),
+  'utf-8',
 );
 
 fs.writeFileSync(
@@ -72,8 +77,11 @@ fs.writeFileSync(
     .replace('${major}', `@(${major})`)
     .replace('${minor}', `@(${minor})`)
     .replace('${patch}', `@(${patch})`)
-    .replace('${prerelease}', prerelease !== undefined ? `@"${prerelease}"` : '[NSNull null]'),
-  'utf-8'
+    .replace(
+      '${prerelease}',
+      prerelease !== undefined ? `@"${prerelease}"` : '[NSNull null]',
+    ),
+  'utf-8',
 );
 
 fs.writeFileSync(
@@ -82,8 +90,11 @@ fs.writeFileSync(
     .replace('${major}', major)
     .replace('${minor}', minor)
     .replace('${patch}', patch)
-    .replace('${prerelease}', prerelease !== undefined ? `'${prerelease}'` : 'null'),
-  'utf-8'
+    .replace(
+      '${prerelease}',
+      prerelease !== undefined ? `'${prerelease}'` : 'null',
+    ),
+  'utf-8',
 );
 
 let packageJson = JSON.parse(cat('package.json'));
@@ -91,16 +102,27 @@ packageJson.version = version;
 fs.writeFileSync('package.json', JSON.stringify(packageJson, null, 2), 'utf-8');
 
 // - change ReactAndroid/gradle.properties
-if (sed('-i', /^VERSION_NAME=.*/, `VERSION_NAME=${version}`, 'ReactAndroid/gradle.properties').code) {
-  echo('Couldn\'t update version for Gradle');
+if (
+  sed(
+    '-i',
+    /^VERSION_NAME=.*/,
+    `VERSION_NAME=${version}`,
+    'ReactAndroid/gradle.properties',
+  ).code
+) {
+  echo("Couldn't update version for Gradle");
   exit(1);
 }
 
 // verify that files changed, we just do a git diff and check how many times version is added across files
-let numberOfChangedLinesWithNewVersion = exec(`git diff -U0 | grep '^[+]' | grep -c ${version} `, {silent: true})
-  .stdout.trim();
+let numberOfChangedLinesWithNewVersion = exec(
+  `git diff -U0 | grep '^[+]' | grep -c ${version} `,
+  {silent: true},
+).stdout.trim();
 if (+numberOfChangedLinesWithNewVersion !== 2) {
-  echo('Failed to update all the files. package.json and gradle.properties must have versions in them');
+  echo(
+    'Failed to update all the files. package.json and gradle.properties must have versions in them',
+  );
   echo('Fix the issue, revert and try again');
   exec('git diff');
   exit(1);
@@ -114,7 +136,9 @@ if (exec(`git commit -a -m "[${version}] Bump version numbers"`).code) {
 
 // - add tag v0.21.0-rc
 if (exec(`git tag v${version}`).code) {
-  echo(`failed to tag the commit with v${version}, are you sure this release wasn't made earlier?`);
+  echo(
+    `failed to tag the commit with v${version}, are you sure this release wasn't made earlier?`,
+  );
   echo('You may want to rollback the last commit');
   echo('git reset --hard HEAD~1');
   exit(1);