From 50c29652a0bbce88f011406f5db06a939f9d0d5e Mon Sep 17 00:00:00 2001
From: Takumasa Sakao <takumasa.sakao@aktsk.jp>
Date: Mon, 20 Nov 2017 23:20:38 +0900
Subject: [PATCH] Expand variables on parseValue

---
 godotenv.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/godotenv.go b/godotenv.go
index b505f51..19751d7 100644
--- a/godotenv.go
+++ b/godotenv.go
@@ -291,6 +291,13 @@ func parseValue(value string, envMap map[string]string) string {
 		}
 	}
 
+	// expand variables
+	value = os.Expand(value, func(key string) string {
+		if val, ok := envMap[key]; ok {
+			return val
+		}
+		return ""
+	})
 	return value
 }