From 79fc90b6463d9b20391b4edd1540bc0a8e84da6f Mon Sep 17 00:00:00 2001
From: shin- <joffrey@dotcloud.com>
Date: Mon, 12 Aug 2013 19:52:09 +0200
Subject: [PATCH] brew: Don't build if docker daemon can't be reached

---
 contrib/brew/brew/brew.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/contrib/brew/brew/brew.py b/contrib/brew/brew/brew.py
index 352d20c77..e07fdfdbb 100644
--- a/contrib/brew/brew/brew.py
+++ b/contrib/brew/brew/brew.py
@@ -32,6 +32,15 @@ def build_library(repository=None, branch=None, namespace=None, push=False,
         logger.info('Repository provided assumed to be a local path')
         dst_folder = repository
 
+    try:
+        client.version()
+    except Exception as e:
+        logger.error('Could not reach the docker daemon. Please make sure it '
+            'is running.')
+        logger.warning('Also make sure you have access to the docker UNIX '
+            'socket (use sudo)')
+        return
+
     #FIXME: set destination folder and only pull latest changes instead of
     # cloning the whole repo everytime
     if not dst_folder: