From a3fee826f1aafd57c5285323eea6627f642f8b63 Mon Sep 17 00:00:00 2001
From: gVisor bot <gvisor-bot@google.com>
Date: Fri, 21 Dec 2018 10:55:21 +0800
Subject: [PATCH] Fix: parse external-ui

---
 config/config.go | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/config/config.go b/config/config.go
index f7e69c5c..8e48f8c7 100644
--- a/config/config.go
+++ b/config/config.go
@@ -153,12 +153,14 @@ func parseGeneral(cfg *rawConfig) (*General, error) {
 	mode := cfg.Mode
 	logLevel := cfg.LogLevel
 
-	if !filepath.IsAbs(externalUI) {
-		externalUI = filepath.Join(C.Path.HomeDir(), externalUI)
-	}
+	if externalUI != "" {
+		if !filepath.IsAbs(externalUI) {
+			externalUI = filepath.Join(C.Path.HomeDir(), externalUI)
+		}
 
-	if _, err := os.Stat(externalUI); os.IsNotExist(err) {
-		return nil, fmt.Errorf("external-ui: %s not exist", externalUI)
+		if _, err := os.Stat(externalUI); os.IsNotExist(err) {
+			return nil, fmt.Errorf("external-ui: %s not exist", externalUI)
+		}
 	}
 
 	general := &General{