From 13128464aa82358e344bcaeceb9d86e84cdd0f11 Mon Sep 17 00:00:00 2001
From: Jakub Warmuz <jakub@warmuz.org>
Date: Fri, 6 Feb 2015 22:54:28 +0000
Subject: [PATCH] ACME: pylint lint plugin

---
 .pylintrc                |  2 +-
 letsencrypt/acme/lint.py | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 letsencrypt/acme/lint.py

diff --git a/.pylintrc b/.pylintrc
index 44fc15b1c..bf4828e75 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -19,7 +19,7 @@ persistent=yes
 
 # List of plugins (as comma separated values of python modules names) to load,
 # usually to register additional checkers.
-load-plugins=
+load-plugins=letsencrypt.acme.lint
 
 
 [MESSAGES CONTROL]
diff --git a/letsencrypt/acme/lint.py b/letsencrypt/acme/lint.py
new file mode 100644
index 000000000..63f75d69d
--- /dev/null
+++ b/letsencrypt/acme/lint.py
@@ -0,0 +1,20 @@
+"""Let's Encrypt ACME PyLint plugin.
+
+http://docs.pylint.org/plugins.html
+
+"""
+from astroid import MANAGER
+from astroid import nodes
+
+
+def register(unused_linter):
+    """Register this module as PyLint plugin."""
+
+def _transform(cls):
+    if (('Message' in cls.basenames or 'ImmutableMap' in cls.basenames or
+         'util.ImmutableMap' in cls.basenames) and (cls.slots() is not None)):
+        for slot in cls.slots():
+            cls.locals[slot.value] = [nodes.EmptyNode()]
+
+
+MANAGER.register_transform(nodes.Class, _transform)