From a4605307700a3803ad7c9c64c8bfed0acd6a4dfd Mon Sep 17 00:00:00 2001
From: Kevin Sawicki <kevin@github.com>
Date: Thu, 5 Dec 2013 10:43:45 -0800
Subject: [PATCH] Show warning message opening opening dev window without repo
 cloned

---
 src/browser/atom-application.coffee | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/browser/atom-application.coffee b/src/browser/atom-application.coffee
index 75b978e72..550023228 100644
--- a/src/browser/atom-application.coffee
+++ b/src/browser/atom-application.coffee
@@ -245,6 +245,14 @@ class AtomApplication
   #    + initialSize:
   #      Object with height and width keys.
   openPath: ({pathToOpen, pidToKillWhenClosed, newWindow, devMode, initialSize}={}) ->
+    if devMode and not fs.existsSync(global.devResourcePath)
+      dialog.showMessageBox
+        type: 'warning'
+        buttons: ['OK']
+        message: 'Atom source directory not found.'
+        detail: 'To run a window in dev mode you need to have the atom/atom repo cloned to ~/github/atom'
+      return
+
     if pathToOpen
       [basename, initialLine] = path.basename(pathToOpen).split(':')
       if initialLine