PM-218 Fix DOS issues with fs

Author: himaniraghav3

config/env.js

@@ -49,7 +49,7 @@ dotenvFiles.forEach(dotenvFile => {
 // Otherwise, we risk importing Node.js core modules into an app instead of Webpack shims.
 // https://github.com/facebook/create-react-app/issues/1023#issuecomment-265344421
 // We also resolve them to make sure all tools using them work consistently.
-const appDirectory = fs.realpathSync(process.cwd())
+const appDirectory = process.cwd()
 process.env.NODE_PATH = (process.env.NODE_PATH || '')
   .split(path.delimiter)
   .filter(folder => folder && !path.isAbsolute(folder))

config/paths.js

@@ -6,7 +6,7 @@ const url = require('url')
 
 // Make sure any symlinks in the project folder are resolved:
 // https://github.com/facebook/create-react-app/issues/637
-const appDirectory = fs.realpathSync(process.cwd())
+const appDirectory = process.cwd()
 const resolveApp = relativePath => path.resolve(appDirectory, relativePath)
 
 const envPublicUrl = process.env.PUBLIC_URL

config/webpack.config.js

@@ -27,9 +27,6 @@ const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false'
 // makes for a smoother build process.
 const shouldInlineRuntimeChunk = process.env.INLINE_RUNTIME_CHUNK !== 'false'
 
-// Check if TypeScript is setup
-const useTypeScript = fs.existsSync(paths.appTsConfig)
-
 // style files regexes
 const cssRegex = /\.css$/
 const cssModuleRegex = /\.module\.css$/
@@ -257,7 +254,7 @@ module.exports = function (webpackEnv) {
       // for React Native Web.
       extensions: paths.moduleFileExtensions
         .map(ext => `.${ext}`)
-        .filter(ext => useTypeScript || !ext.includes('ts')),
+        .filter(ext => !ext.includes('ts')),
       alias: {
         // Support React Native Web
         // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/

scripts/build.js

@@ -28,7 +28,7 @@ const printBuildError = require('react-dev-utils/printBuildError')
 const measureFileSizesBeforeBuild =
   FileSizeReporter.measureFileSizesBeforeBuild
 const printFileSizesAfterBuild = FileSizeReporter.printFileSizesAfterBuild
-const useYarn = fs.existsSync(paths.yarnLockFile)
+const useYarn = false
 
 // These sizes are pretty large. We'll warn for bundles exceeding them.
 const WARN_AFTER_BUNDLE_GZIP_SIZE = 512 * 1024

scripts/start.js

@@ -32,7 +32,7 @@ const paths = require('../config/paths')
 const configFactory = require('../config/webpack.config')
 const createDevServerConfig = require('../config/webpackDevServer.config')
 
-const useYarn = fs.existsSync(paths.yarnLockFile)
+const useYarn = true
 const isInteractive = process.stdout.isTTY
 
 // Warn and crash if required files are missing