added info CLI command

local-cli/commands.js

@@ -51,6 +51,7 @@ const documentedCommands = [
   require('./logAndroid/logAndroid'),
   require('./logIOS/logIOS'),
   require('./dependencies/dependencies'),
+  require('./info/info'),
 ];
 
 // The user should never get here because projects are inited by

local-cli/info/info.js

@@ -0,0 +1,47 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const envinfo = require('envinfo');
+
+const info = function() {
+  const args = Array.prototype.slice.call(arguments)[2];
+
+  try {
+    envinfo.print({
+      packages: typeof args.packages === 'string' ? ['react', 'react-native'].concat(args.packages.split(',')) : args.packages
+    });
+  } catch (error) {
+    console.log('Error: unable to print environment info');
+    console.log(error);
+  }
+}
+
+module.exports = {
+  name: 'info',
+  description: 'Get relevant version info about OS, toolchain and libraries',
+  options: [
+    {
+      command: '--packages [string]',
+      description: 'Which packages from your package.json to include, in addition to the default React Native and React versions.',
+      default: ['react', 'react-native']
+    },
+  ],
+  examples: [
+    {
+      desc: 'Get standard version info',
+      cmd: 'react-native info',
+    },
+    {
+      desc: 'Get standard version info & specified package versions',
+      cmd: 'react-native info --packages jest,eslint,babel-polyfill',
+    }
+  ],
+  func: info,
+};

package.json

@@ -166,6 +166,7 @@
     "create-react-class": "^15.5.2",
     "debug": "^2.2.0",
     "denodeify": "^1.2.1",
+    "envinfo": "^3.0.0",
     "errno": ">=0.1.1 <0.2.0-0",
     "event-target-shim": "^1.0.5",
     "fbjs": "0.8.12",