From e0050a63db208dd61326cdd337f390724446a27f Mon Sep 17 00:00:00 2001
From: Pietro Carrara <piticarrara@gmail.com>
Date: Mon, 27 Nov 2017 10:46:18 -0200
Subject: [PATCH] Using '-' doesn't raise an error

---
 cmd.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmd.go b/cmd.go
index 64a16474..8c4b7b63 100644
--- a/cmd.go
+++ b/cmd.go
@@ -152,7 +152,7 @@ func parser() (op string, options []string, packages []string, changedConfig boo
 			}
 		}
 
-		if arg[0] == '-' && arg[1] == '-' {
+		if strings.HasPrefix(arg, "--") {
 			changedConfig = true
 			switch arg {
 			case "--printconfig":