Use Node's spawn behavior except default to a shell on Windows

packages/react-dev-utils/crossSpawn.js

@@ -7,6 +7,36 @@
 
 'use strict';
 
-var crossSpawn = require('cross-spawn');
+const { spawn } = require('child_process');
+
+function crossSpawn(file, args, options) {
+  if (typeof file !== 'string' || file.length === 0) {
+    throw new TypeError('"file" argument must be a non-empty string');
+  }
+
+  if (Array.isArray(args)) {
+    args = args.slice(0);
+  } else if (
+    args !== undefined &&
+    (args === null || typeof args !== 'object')
+  ) {
+    throw new TypeError('Incorrect value of args option');
+  } else {
+    options = args;
+    args = [];
+  }
+
+  if (options === undefined) {
+    options = {};
+  } else if (options === null || typeof options !== 'object') {
+    throw new TypeError('"options" argument must be an object');
+  }
+
+  // Default to using a shell on Windows
+  if (options.shell === undefined && process.platform === 'win32') {
+    options.shell = true;
+  }
+  return spawn(file, args, options);
+}
 
 module.exports = crossSpawn;

packages/react-dev-utils/openBrowser.js

@@ -9,7 +9,7 @@
 
 var chalk = require('chalk');
 var execSync = require('child_process').execSync;
-var spawn = require('cross-spawn');
+var spawn = require('./crossSpawn');
 var opn = require('opn');
 
 // https://github.com/sindresorhus/opn#app

packages/react-dev-utils/package.json

@@ -39,7 +39,6 @@
     "address": "1.0.3",
     "babel-code-frame": "6.26.0",
     "chalk": "1.1.3",
-    "cross-spawn": "5.1.0",
     "detect-port-alt": "1.1.3",
     "escape-string-regexp": "1.0.5",
     "filesize": "3.5.11",