From e87fc3b863507baca2154c1d981560684984e11f Mon Sep 17 00:00:00 2001
From: Alexey Aksenov <ezh@ezh.msk.ru>
Date: Sun, 5 Jun 2022 20:44:51 +0400
Subject: [PATCH] Skip empty value assignment

---
 cleanenv.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cleanenv.go b/cleanenv.go
index 3b03d74..e764551 100644
--- a/cleanenv.go
+++ b/cleanenv.go
@@ -321,7 +321,9 @@ func readEnvVars(cfg interface{}, update bool) error {
 
 		for _, env := range meta.envList {
 			if value, ok := os.LookupEnv(env); ok {
-				rawValue = &value
+				if len(strings.TrimSpace(value)) > 0 {
+					rawValue = &value
+				}
 				break
 			}
 		}