From 9b69a93484f04ccef21686b0d7f7a21d0140e2e6 Mon Sep 17 00:00:00 2001
From: dtimberlake <daniel@danieltimberlake.com>
Date: Mon, 19 Dec 2016 01:30:46 -0600
Subject: [PATCH] parsing GetAtt now correctly converts atributes with a '.'

---
 awscli/customizations/cloudformation/yamlhelper.py          | 2 +-
 tests/unit/customizations/cloudformation/test_yamlhelper.py | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/awscli/customizations/cloudformation/yamlhelper.py b/awscli/customizations/cloudformation/yamlhelper.py
index 7f622aa3cbce..9c09c1b7a11b 100644
--- a/awscli/customizations/cloudformation/yamlhelper.py
+++ b/awscli/customizations/cloudformation/yamlhelper.py
@@ -35,7 +35,7 @@ def intrinsics_multi_constructor(loader, tag_prefix, node):
         # ShortHand notation for !GetAtt accepts Resource.Attribute format
         # while the standard notation is to use an array
         # [Resource, Attribute]. Convert shorthand to standard format
-        value = node.value.split(".")
+        value = node.value.split(".", 1)
 
     elif isinstance(node, ScalarNode):
         # Value of this node is scalar
diff --git a/tests/unit/customizations/cloudformation/test_yamlhelper.py b/tests/unit/customizations/cloudformation/test_yamlhelper.py
index ad29e1afc5b7..bdd628ed4390 100644
--- a/tests/unit/customizations/cloudformation/test_yamlhelper.py
+++ b/tests/unit/customizations/cloudformation/test_yamlhelper.py
@@ -27,6 +27,7 @@ class TestYaml(unittest.TestCase):
         Key2: !GetAtt Another.Arn
         Key3: !FooBar [!Baz YetAnother, "hello"]
         Key4: !SomeTag {"a": "1"}
+        Key5: !GetAtt OneMore.Outputs.Arn
     """
 
     parsed_yaml_dict = {
@@ -47,6 +48,9 @@ class TestYaml(unittest.TestCase):
                 "Fn::SomeTag": {
                     "a": "1"
                 }
+            },
+            "Key5": {
+                "Fn::GetAtt": ["OneMore", "Outputs.Arn"]
             }
         }
     }