Open xcworkspace (CocoaPods support) (#197)

Fixes #196

README.md

@@ -415,7 +415,8 @@ Packager so try to avoid doing so.
 - You can launch your app on the simulator without opening Xcode by running
 `react-native run-ios` in your app's root directory (since RN 0.19.0).
 
-- To change advanced settings run `re-natal xcode` to quickly open the Xcode project.
+- To change advanced settings run `re-natal xcode` to quickly open the Xcode project. (A workspace 
+will be opened in preference to a project if present.)
 
 - If you have customized project layout and `re-natal upgrade` does not fit you well,
 then these commands might be useful for you:
@@ -450,7 +451,7 @@ $ node ../re-natal/index.js
     init [options] <name>              create a new ClojureScript React Native project
     upgrade                            upgrades project files to current installed version of re-natal (the upgrade of re-natal itself is done via npm)
     add-platform <platform>            adds additional app platform: 'windows' - UWP app, 'wpf' - WPF app
-    xcode                              open Xcode project
+    xcode                              open Xcode project (or workspace if present)
     deps                               install all dependencies for the project
     use-figwheel                       generate index.*.js for development with figwheel
     use-android-device <type>          sets up the host for android device type: 'real' - localhost, 'avd' - 10.0.2.2, 'genymotion' - 10.0.3.2, IP

re-natal.coffee

@@ -675,17 +675,21 @@ addPlatform = (platform) ->
     logErr message
 
 openXcode = (name) ->
+  if fs.existsSync "ios/#{name}.xcworkspace"
+    openTarget = "#{name}.xcworkspace"
+  else
+    openTarget = "#{name}.xcodeproj"
   try
-    exec "open ios/#{name}.xcodeproj"
+    exec "open ios/#{openTarget}"
   catch {message}
     logErr \
       if message.match /ENOENT/i
         """
-        Cannot find #{name}.xcodeproj in ios.
+        Cannot find #{openTarget} in ios.
         Run this command from your project's root directory.
         """
       else if message.match /EACCES/i
-        "Invalid permissions for opening #{name}.xcodeproj in ios"
+        "Invalid permissions for opening #{openTarget} in ios"
       else
         message
 
@@ -941,7 +945,7 @@ cli.command 'add-platform <platform>'
     addPlatform(platform)
 
 cli.command 'xcode'
-  .description 'open Xcode project'
+  .description 'open Xcode project (or workspace if present)'
   .action ->
     ensureOSX ->
       ensureXcode ->