From 878215eb4233f4fc515edee10d802ef31a1d43da Mon Sep 17 00:00:00 2001
From: Pedro Belo <pedro@heroku.com>
Date: Fri, 3 Apr 2015 11:58:51 -0700
Subject: [PATCH] Use commander to parse command-line options

Makes it a bit more declarative/easier to add new commands and
options to the command line.
---
 react-native-cli/index.js     | 36 +++++++++++++++--------------------
 react-native-cli/package.json |  3 +++
 2 files changed, 18 insertions(+), 21 deletions(-)

diff --git a/react-native-cli/index.js b/react-native-cli/index.js
index 5742067f8ba80f..519c98950529c5 100755
--- a/react-native-cli/index.js
+++ b/react-native-cli/index.js
@@ -6,6 +6,7 @@
 
 var fs = require('fs');
 var path = require('path');
+var program = require('commander');
 var spawn = require('child_process').spawn;
 
 var CLI_MODULE_PATH = function() {
@@ -25,29 +26,22 @@ try {
 if (cli) {
   cli.run();
 } else {
-  var args = process.argv.slice(2);
-  if (args.length === 0) {
-    console.error(
-      'You did not pass any commands, did you mean to run `react-native init`?'
-    );
+  program
+    .command('init <projectName>')
+    .description('create new React Native project with given name')
+    .action(init);
+
+  program.on('*', function(command) {
+    console.error('Unknown command: ' + command);
+    program.outputHelp();
     process.exit(1);
-  }
+  });
 
-  if (args[0] === 'init') {
-    if (args[1]) {
-      init(args[1]);
-    } else {
-      console.error(
-        'Usage: react-native init <ProjectName>'
-      );
-      process.exit(1);
-    }
-  } else {
-    console.error(
-      'Command `%s` unrecognized. ' +
-      'Did you mean to run this inside a react-native project?',
-      args[0]
-    );
+  program.parse(process.argv);
+
+  if (!program.args.length) {
+    console.error('You did not pass any commands, did you mean to run `react-native init`?');
+    program.outputHelp();
     process.exit(1);
   }
 }
diff --git a/react-native-cli/package.json b/react-native-cli/package.json
index 8644e7eae217ca..a4f2a1b55495dd 100644
--- a/react-native-cli/package.json
+++ b/react-native-cli/package.json
@@ -5,5 +5,8 @@
   "main": "index.js",
   "bin": {
     "react-native": "index.js"
+  },
+  "dependencies": {
+    "commander": "^2.7.x"
   }
 }