From 0a7cad51ef27200ce065067b0d6401c15f4fb509 Mon Sep 17 00:00:00 2001
From: Steve Domino <domino.steve@gmail.com>
Date: Fri, 4 Sep 2015 16:29:28 -0600
Subject: [PATCH] checking if a flag is 'private' before adding it to the list
 of flags; this allows for hidden flags

---
 command.go | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/command.go b/command.go
index bf642b53..21e001da 100644
--- a/command.go
+++ b/command.go
@@ -917,12 +917,16 @@ func (c *Command) LocalFlags() *flag.FlagSet {
 
 	local := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
 	c.lflags.VisitAll(func(f *flag.Flag) {
-		local.AddFlag(f)
+		if !f.Private {
+			local.AddFlag(f)
+		}
 	})
 	if !c.HasParent() {
 		flag.CommandLine.VisitAll(func(f *flag.Flag) {
 			if local.Lookup(f.Name) == nil {
-				local.AddFlag(f)
+				if !f.Private {
+					local.AddFlag(f)
+				}
 			}
 		})
 	}
@@ -942,7 +946,9 @@ func (c *Command) InheritedFlags() *flag.FlagSet {
 		if x.HasPersistentFlags() {
 			x.PersistentFlags().VisitAll(func(f *flag.Flag) {
 				if inherited.Lookup(f.Name) == nil && local.Lookup(f.Name) == nil {
-					inherited.AddFlag(f)
+					if !f.Private {
+						inherited.AddFlag(f)
+					}
 				}
 			})
 		}