Merge remote-tracking branch 'origin/master' into allow-writer-to-be-set

Conflicts:
	app.go
	help.go

command.go

@@ -30,6 +30,8 @@ type Command struct {
 	Flags []Flag
 	// Treat all flags as normal arguments if true
 	SkipFlagParsing bool
+	// Boolean to hide built-in help command
+	HideHelp bool
 }
 
 // Invokes the command given the context, parses ctx.Args() to generate command-specific flags
@@ -39,11 +41,13 @@ func (c Command) Run(ctx *Context) error {
 		return c.startApp(ctx)
 	}
 
-	// append help to flags
-	c.Flags = append(
-		c.Flags,
-		HelpFlag,
-	)
+	if !c.HideHelp {
+		// append help to flags
+		c.Flags = append(
+			c.Flags,
+			HelpFlag,
+		)
+	}
 
 	if ctx.App.EnableBashCompletion {
 		c.Flags = append(c.Flags, BashCompletionFlag)
@@ -115,9 +119,13 @@ func (c Command) startApp(ctx *Context) error {
 		app.Usage = c.Usage
 	}
 
+	// set CommandNotFound
+	app.CommandNotFound = ctx.App.CommandNotFound
+
 	// set the flags and commands
 	app.Commands = c.Subcommands
 	app.Flags = c.Flags
+	app.HideHelp = c.HideHelp
 
 	// bash completion
 	app.EnableBashCompletion = ctx.App.EnableBashCompletion