From b7fb7e2e849a8a5a7a598b4cb761a122d435e140 Mon Sep 17 00:00:00 2001
From: Christopher Crone <christopher.crone@docker.com>
Date: Tue, 19 May 2020 14:05:51 +0200
Subject: [PATCH] Allow setting config dir with env var

Signed-off-by: Christopher Crone <christopher.crone@docker.com>
---
 cli/config/flags.go | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/cli/config/flags.go b/cli/config/flags.go
index de0c04f07..b9b3b3ffc 100644
--- a/cli/config/flags.go
+++ b/cli/config/flags.go
@@ -51,10 +51,14 @@ type ConfigFlags struct {
 
 // AddConfigFlags adds persistent (global) flags
 func (c *ConfigFlags) AddConfigFlags(flags *pflag.FlagSet) {
-	flags.StringVar(&c.Config, ConfigFlagName, filepath.Join(home(), ConfigFileDir), "Location of the client config files `DIRECTORY`")
+	flags.StringVar(&c.Config, ConfigFlagName, confDir(), "Location of the client config files `DIRECTORY`")
 }
 
-func home() string {
+func confDir() string {
+	env := os.Getenv("DOCKER_CONFIG")
+	if env != "" {
+		return env
+	}
 	home, _ := os.UserHomeDir()
-	return home
+	return filepath.Join(home, ConfigFileDir)
 }