Process exit when dependencies not found

- Show error and exit when dependencies not found.
- Log install show custom package name

Author: n3tr

packages/create-react-app/index.js

@@ -133,10 +133,6 @@ function createApp(name, verbose, version, template) {
   var originalDirectory = process.cwd();
   process.chdir(root);
 
-  console.log('Installing packages. This might take a couple minutes.');
-  console.log('Installing ' + chalk.cyan('react, react-dom, react-scripts') + '...');
-  console.log();
-
   run(root, appName, version, verbose, originalDirectory, template);
 }
 
@@ -176,6 +172,10 @@ function run(root, appName, version, verbose, originalDirectory, template) {
 
   var allDependencies = ['react', 'react-dom', packageToInstall];
 
+  console.log('Installing packages. This might take a couple minutes.');
+  console.log('Installing ' + chalk.cyan(`react, react-dom, ${packageName}`) + '...');
+  console.log();
+
   install(allDependencies, verbose, function(code, command, args) {
     if (code !== 0) {
       console.error(chalk.cyan(command + ' ' + args.join(' ')) + ' failed');
@@ -276,24 +276,29 @@ function checkAppName(appName) {
 
 function moveReactScriptsToDev(packageName) {
   var packagePath = path.join(process.cwd(), 'package.json');
-  if (!fs.existsSync(packagePath)) {
-    return;
-  }
-
   var packageJson = require(packagePath);
+
   if (typeof packageJson.dependencies === 'undefined') {
-    return;
+    console.error(
+      chalk.red('Missing dependencies in package.json')
+    );
+    process.exit(1);
   }
 
-  var packageVersion = packageJson.dependencies[packageName]
-
-  if (typeof packageVersion !== 'undefined') {
-    packageJson.devDependencies = packageJson.devDependencies || {};
-    packageJson.devDependencies[packageName] = packageVersion;
-    delete packageJson.dependencies[packageName];
+  var packageVersion = packageJson.dependencies[packageName];
 
-    fs.writeFileSync(packagePath, JSON.stringify(packageJson, null, 2));
+  if (typeof packageVersion === 'undefined') {
+    console.error(
+      chalk.red('Unable to find ' + packageName + ' in package.json')
+    );
+    process.exit(1);
   }
+
+  packageJson.devDependencies = packageJson.devDependencies || {};
+  packageJson.devDependencies[packageName] = packageVersion;
+  delete packageJson.dependencies[packageName];
+
+  fs.writeFileSync(packagePath, JSON.stringify(packageJson, null, 2));
 }
 
 // If project only contains files generated by GH, it’s safe.