From 8cd33fccc7384ef531731b6ddf87c19f7f768d20 Mon Sep 17 00:00:00 2001
From: "Jason R. Coombs" <jaraco@jaraco.com>
Date: Tue, 2 Feb 2016 20:03:13 -0500
Subject: Update signatures to require keyrings.alt for improved compatibility
 with keyring 8.0

---
 setup.py               | 2 +-
 wheel/tool/__init__.py | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/setup.py b/setup.py
index 62cd584..24957ca 100644
--- a/setup.py
+++ b/setup.py
@@ -39,7 +39,7 @@ setup(name='wheel',
           ],
       extras_require={
           ':python_version=="2.6"': ['argparse'],
-          'signatures': ['keyring'],
+          'signatures': ['keyring', 'keyrings.alt'],
           'signatures:sys_platform!="win32"': ['pyxdg'],
           'faster-signatures': ['ed25519ll'],
           'tool': []
diff --git a/wheel/tool/__init__.py b/wheel/tool/__init__.py
index 389e619..95f0a9b 100644
--- a/wheel/tool/__init__.py
+++ b/wheel/tool/__init__.py
@@ -29,8 +29,9 @@ def get_keyring():
     try:
         from ..signatures import keys
         import keyring
-    except ImportError:
-        raise WheelError("Install wheel[signatures] (requires keyring, pyxdg) for signatures.")
+        assert keyring.get_keyring().priority
+    except (ImportError, AssertionError):
+        raise WheelError("Install wheel[signatures] (requires keyring, keyrings.alt, pyxdg) for signatures.")
     return keys.WheelKeys, keyring
 
 def keygen(get_keyring=get_keyring):
-- 
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