return actual value from subcommand

bee.go

@@ -30,7 +30,7 @@ const version = "1.2.1"
 type Command struct {
 	// Run runs the command.
 	// The args are the arguments after the command name.
-	Run func(cmd *Command, args []string)
+	Run func(cmd *Command, args []string) int
 
 	// UsageLine is the one-line usage message.
 	// The first word in the line is taken to be the command name.
@@ -110,8 +110,7 @@ func main() {
 				cmd.Flag.Parse(args[1:])
 				args = cmd.Flag.Args()
 			}
-			cmd.Run(cmd, args)
-			os.Exit(2)
+			os.Exit(cmd.Run(cmd, args))
 			return
 		}
 	}