Gracefully handle initial installation error (facebook#1512)

* Gracefully handle initial installation error

* Print out message when problem occurs
* Delete project folder on errors

* Fix directory deleting message

Resolves facebook#1505
# Conflicts:
#	tasks/e2e-installs.sh

Author: chitchu

packages/create-react-cy-app/index.js

@@ -182,7 +182,30 @@ function run(root, appName, version, verbose, originalDirectory, template) {
 
   install(allDependencies, verbose, function(code, command, args) {
     if (code !== 0) {
-      console.error(chalk.cyan(command + ' ' + args.join(' ')) + ' failed');
+      console.log();
+      console.error('Aborting installation.', chalk.cyan(command + ' ' + args.join(' ')), 'has failed.');
+      // On 'exit' we will delete these files from target directory.
+      var knownGeneratedFiles = [
+        'package.json', 'npm-debug.log', 'yarn-error.log', 'yarn-debug.log', 'node_modules'
+      ];
+      var currentFiles = fs.readdirSync(path.join(root));
+      currentFiles.forEach(function (file) {
+        knownGeneratedFiles.forEach(function (fileToMatch) {
+          // This will catch `(npm-debug|yarn-error|yarn-debug).log*` files
+          // and the rest of knownGeneratedFiles.
+          if ((fileToMatch.match(/.log/g) && file.indexOf(fileToMatch) === 0) || file === fileToMatch) {
+            console.log('Deleting generated file...', chalk.cyan(file));
+            fs.removeSync(path.join(root, file));
+          }
+        });
+      });
+      var remainingFiles = fs.readdirSync(path.join(root));
+      if (!remainingFiles.length) {
+        // Delete target folder if empty
+        console.log('Deleting', chalk.cyan(appName + '/'), 'from', chalk.cyan(path.resolve(root, '..')));
+        fs.removeSync(path.join(root));
+      }
+      console.log('Done.');
       process.exit(1);
     }