From c25387f10d265e6ed88fef3fe3d37bc757124983 Mon Sep 17 00:00:00 2001
From: akutz <sakutz@gmail.com>
Date: Thu, 29 Oct 2015 12:57:16 -0500
Subject: [PATCH] AllKeys() now includes bound flag and env var keys

This patch fixes a bug where the function `AllKeys()` did not include
the keys for bound flags and environment variables.
---
 viper.go | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/viper.go b/viper.go
index 20c12ec..f316671 100644
--- a/viper.go
+++ b/viper.go
@@ -962,19 +962,27 @@ func (v *Viper) AllKeys() []string {
 	m := map[string]struct{}{}
 
 	for key, _ := range v.defaults {
-		m[key] = struct{}{}
+		m[strings.ToLower(key)] = struct{}{}
+	}
+
+	for key, _ := range v.pflags {
+		m[strings.ToLower(key)] = struct{}{}
+	}
+
+	for key, _ := range v.env {
+		m[strings.ToLower(key)] = struct{}{}
 	}
 
 	for key, _ := range v.config {
-		m[key] = struct{}{}
+		m[strings.ToLower(key)] = struct{}{}
 	}
 
 	for key, _ := range v.kvstore {
-		m[key] = struct{}{}
+		m[strings.ToLower(key)] = struct{}{}
 	}
 
 	for key, _ := range v.override {
-		m[key] = struct{}{}
+		m[strings.ToLower(key)] = struct{}{}
 	}
 
 	a := []string{}