[cli] suppress yeoman create output in init

local-cli/init.js

@@ -2,6 +2,15 @@
 
 var path = require('path');
 var yeoman = require('yeoman-environment');
+var TerminalAdapter = require('yeoman-environment/lib/adapter.js');
+
+class CreateSuppressingTerminalAdapter extends TerminalAdapter {
+  constructor() {
+    super();
+    // suppres 'create' output generated by yeoman
+    this.log.create = function() {};
+  }
+};
 
 // argsOrName can be:
 // - A string (e.g. 'AwesomeApp'). This is the common case when
@@ -10,7 +19,7 @@ var yeoman = require('yeoman-environment');
 //   need to pass custom arguments to the generator.
 function init(projectDir, argsOrName) {
   console.log('Setting up new React Native app in ' + projectDir);
-  var env = yeoman.createEnv();
+  var env = yeoman.createEnv(undefined, undefined, new CreateSuppressingTerminalAdapter());
   env.register(require.resolve(path.join(__dirname, 'generator')), 'react:app');
   // argv is e.g.
   // ['node', 'react-native', 'init', 'AwesomeApp', '--verbose']