Make 'npm start' an alias for 'packager.sh', don't silently no-op on Windows

Reviewed By: martinbigio

Differential Revision: D2559772

fb-gh-sync-id: d1cd2874c32459d6e1f0af7d084c3559ebc145aa

Author: Martin Konicek

local-cli/cli.js

@@ -15,13 +15,13 @@ var generate = require('../private-cli/src/generate/generate');
 var init = require('./init.js');
 var library = require('../private-cli/src/library/library');
 var runAndroid = require('./run-android.js');
+var runPackager = require('./run-packager.js');
 var server = require('../private-cli/src/server/server');
 
 // TODO: remove once we fully roll out the `private-cli` based cli
 // var bundle_DEPRECATED = require('./bundle.js');
 // var generateAndroid_DEPRECATED = require('./generate-android.js');
 // var newLibrary_DEPRECATED = require('./new-library.js');
-// var runPackager_DEPRECATED = require('./run-packager.js');
 
 function printUsage() {
   console.log([
@@ -31,7 +31,8 @@ function printUsage() {
     '  start: starts the webserver',
     '  bundle: builds the javascript bundle for offline use',
     '  new-library: generates a native library bridge',
-    '  android: generates an Android project for your app'
+    '  android: generates an Android project for your app',
+    '  run-android: builds your app and starts it on a connected Android emulator or device'
   ].join('\n'));
   process.exit(1);
 }
@@ -53,8 +54,7 @@ function run() {
   var config = Config.get(__dirname);
   switch (args[0]) {
   case 'start':
-    server(args, config).done();
-    // runPackager_DEPRECATED();
+    runPackager(false);
     break;
   case 'bundle':
     bundle(args, config).done();
@@ -86,6 +86,9 @@ function run() {
   case 'run-android':
     runAndroid();
     break;
+  case 'help':
+    printUsage();
+    break;
   default:
     console.error('Command `%s` unrecognized', args[0]);
     printUsage();

local-cli/run-packager.js

@@ -8,9 +8,14 @@
  */
 'use strict';
 
+var chalk = require('chalk');
 var path = require('path');
 var child_process = require('child_process');
 
+/**
+ * Main entry point to starting the packager from JS.
+ * @param {boolean} newWindow If true, will start the packager in a new shell window.
+ */
 module.exports = function(newWindow) {
   if (newWindow) {
     var launchPackagerScript =
@@ -22,6 +27,16 @@ module.exports = function(newWindow) {
         'xterm',
         ['-e', 'sh', launchPackagerScript],
         {detached: true});
+    } else if (/^win/.test(process.platform)) {
+      console.log(chalk.yellow('Starting the packager in a new window ' +
+        'is not supported on Windows yet.\nPlease start it manually using ' +
+        '\'react-native start\'.'));
+      console.log('We believe the best Windows ' +
+        'support will come from a community of people\nusing React Native on ' +
+        'Windows on a daily basis.\n' +
+        'Would you be up for sending a pull request?');
+    } else {
+      console.log('Cannot start the packager. Unknown platform ' + process.platform);
     }
   } else {
     if (/^win/.test(process.platform)) {