From b96dd75141f233adeb39cbe63c41c962585a1c7a Mon Sep 17 00:00:00 2001
From: Eric Paris <eparis@redhat.com>
Date: Fri, 13 Feb 2015 19:44:12 -0500
Subject: [PATCH] new InheritedFlags() command to tell all flags which
 persisted from a parent

---
 command.go | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/command.go b/command.go
index 5ff32ea..3cf7db2 100644
--- a/command.go
+++ b/command.go
@@ -737,6 +737,34 @@ func (c *Command) LocalFlags() *flag.FlagSet {
 	return local
 }
 
+// All Flags which were inherited from parents commands
+func (c *Command) InheritedFlags() *flag.FlagSet {
+	c.mergePersistentFlags()
+
+	local := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+
+        var rmerge func(x *Command)
+
+        rmerge = func(x *Command) {
+                if x.HasPersistentFlags() {
+                        x.PersistentFlags().VisitAll(func(f *flag.Flag) {
+                                if local.Lookup(f.Name) == nil {
+                                        local.AddFlag(f)
+                                }
+                        })
+                }
+                if x.HasParent() {
+                        rmerge(x.parent)
+                }
+        }
+
+	if c.HasParent() {
+		rmerge(c.parent)
+	}
+
+	return local
+}
+
 // Get the Persistent FlagSet specifically set in the current command
 func (c *Command) PersistentFlags() *flag.FlagSet {
 	if c.pflags == nil {