From fd02443d4235cd632f33e1d77e005ae463b9c444 Mon Sep 17 00:00:00 2001
From: "martin f. krafft" <madduck@madduck.net>
Date: Thu, 20 Jun 2013 07:55:35 +0200
Subject: [PATCH] Enable negated patterns

A host pattern of the form '!foo' by itself does not work, but
'all:!foo' does. If the first pattern is a negation, this commit
automatically prepends 'all'.

Signed-off-by: martin f. krafft <madduck@madduck.net>
---
 lib/ansible/inventory/__init__.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/ansible/inventory/__init__.py b/lib/ansible/inventory/__init__.py
index d5df2f89d9..f85add0ad7 100644
--- a/lib/ansible/inventory/__init__.py
+++ b/lib/ansible/inventory/__init__.py
@@ -136,6 +136,11 @@ class Inventory(object):
         finds hosts that match a list of patterns. Handles negative
         matches as well as intersection matches.
         """
+        try:
+            if patterns[0].startswith("!"):
+                patterns.insert(0, "all")
+        except IndexError:
+            pass
 
         hosts = set()
         for p in patterns: