From 590b2378b387d800b76946b741bc7c490838282e Mon Sep 17 00:00:00 2001
From: Victor Ruiz <bictorman@users.noreply.github.com>
Date: Thu, 18 Feb 2016 19:30:45 +0100
Subject: [PATCH] replace '.' with '_' in environment variables

---
 flag.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/flag.go b/flag.go
index 151cae1..5bbaafb 100644
--- a/flag.go
+++ b/flag.go
@@ -860,7 +860,8 @@ func (f *FlagSet) ParseEnv(environ []string) error {
 			envKey = f.envPrefix + "_" + envKey
 		}
 		envKey = strings.Replace(envKey, "-", "_", -1)
-
+		envKey = strings.Replace(envKey, ".", "_", -1)
+		
 		value, isSet := env[envKey]
 		if !isSet {
 			continue