cmd is ok

cmd/config/config.go

@@ -2,10 +2,7 @@ package config
 
 import "github.com/urfave/cli/v2"
 
-var Command *cli.Command
+var Command = &cli.Command{
-
-func init() {
-	Command = &cli.Command{
 	Name:  "config",
 	Usage: "config some settings",
 	Subcommands: []*cli.Command{
@@ -14,4 +11,3 @@ func init() {
 		DNSCommand,
 	},
 }
-}

cmd/config/database.go

@@ -7,16 +7,13 @@ import (
 	"github.com/urfave/cli/v2"
 )
 
-var DatabaseCommand *cli.Command
+var migrationCommand = &cli.Command{
-
-func init() {
-	migrationCommand := &cli.Command{
 	Name:   "migrate",
 	Usage:  "migrate database",
 	Action: migrateDatabase,
 }
 
-	DatabaseCommand = &cli.Command{
+var DatabaseCommand = &cli.Command{
 	Name:    "database",
 	Usage:   "database administration",
 	Aliases: []string{"db"},
@@ -24,7 +21,6 @@ func init() {
 		migrationCommand,
 	},
 }
-}
 
 func migrateDatabase(c *cli.Context) error {
 	if err := database.Connect(c.String("mysql-dsn")); err != nil {

cmd/config/dns.go

@@ -5,25 +5,22 @@ import (
 	"reCoreD-UI/database"
 
 	"github.com/urfave/cli/v2"
+	"github.com/urfave/cli/v2/altsrc"
 )
 
-var DNSCommand *cli.Command
+var DNSCommand = &cli.Command{
-
-func init() {
-	DNSCommand = &cli.Command{
 	Name:  "dns",
 	Usage: "Config DNS Settings",
 	Flags: []cli.Flag{
-			&cli.StringSliceFlag{
+		altsrc.NewStringSliceFlag(&cli.StringSliceFlag{
 			Name:     "servers",
 			Usage:    "dns servers",
 			Aliases:  []string{"s"},
 			Required: true,
-			},
+		}),
 	},
 	Action: setDNS,
 }
-}
 
 func setDNS(c *cli.Context) error {
 	if err := database.Connect(c.String("mysql-dsn")); err != nil {

cmd/config/user.go

@@ -5,33 +5,30 @@ import (
 	"reCoreD-UI/database"
 
 	"github.com/urfave/cli/v2"
+	"github.com/urfave/cli/v2/altsrc"
 )
 
-var UserCommand *cli.Command
+var UserCommand = &cli.Command{
-
-func init() {
-	UserCommand = &cli.Command{
 	Name:  "user",
 	Usage: "set admin username and password",
 	Flags: []cli.Flag{
-			&cli.StringFlag{
+		altsrc.NewStringFlag(&cli.StringFlag{
 			Name:    "username",
 			Aliases: []string{"u"},
 			Value:   "amdin",
 			Usage:   "admin username",
 			EnvVars: []string{"RECORED_ADMIN_USERNAME"},
-			},
+		}),
-			&cli.StringFlag{
+		altsrc.NewStringFlag(&cli.StringFlag{
 			Name:     "passowrd",
 			Aliases:  []string{"p"},
 			Required: true,
 			Usage:    "admin password",
 			EnvVars:  []string{"RECORED_ADMIN_PASSWORD"},
-			},
+		}),
 	},
 	Action: setUser,
 }
-}
 
 func setUser(c *cli.Context) error {
 	if err := database.Connect(c.String("mysql-dsn")); err != nil {

cmd/server/server.go

@@ -4,34 +4,31 @@ import (
 	webserver "reCoreD-UI/server"
 
 	"github.com/urfave/cli/v2"
+	"github.com/urfave/cli/v2/altsrc"
 )
 
-var Command *cli.Command
+var Command = &cli.Command{
-
-func init() {
-	Command = &cli.Command{
 	Name:  "server",
 	Usage: "run server",
 	Flags: []cli.Flag{
-			&cli.StringFlag{
+		altsrc.NewStringFlag(&cli.StringFlag{
 			Name:  "prefix",
 			Value: "/",
 			Usage: "web prefix",
-			},
+		}),
-			&cli.StringFlag{
+		altsrc.NewStringFlag(&cli.StringFlag{
 			Name:  "listen",
 			Value: "[::]",
 			Usage: "IP for listen at",
-			},
+		}),
-			&cli.IntFlag{
+		altsrc.NewIntFlag(&cli.IntFlag{
 			Name:  "port",
 			Value: 8080,
 			Usage: "Port for listen at",
-			},
+		}),
 	},
 	Action: runServer,
 }
-}
 
 func runServer(c *cli.Context) error {
 	server, err := webserver.NewServer(c)

main.go

@@ -2,6 +2,8 @@ package main
 
 import (
 	"os"
+	"reCoreD-UI/cmd/config"
+	"reCoreD-UI/cmd/server"
 
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli/v2"
@@ -18,17 +20,14 @@ func main() {
 			Name:    "config",
 			Usage:   "config yaml file",
 			Aliases: []string{"c"},
-			Value:   "config.yaml",
 			EnvVars: []string{"RECORED_CONFIG_FILE"},
 		},
-		altsrc.NewStringSliceFlag(&cli.StringSliceFlag{}),
+		altsrc.NewStringFlag(&cli.StringFlag{
-		&cli.StringFlag{
 			Name:     "mysql-dsn",
 			Usage:    "mysql dsn",
-			Required: true,
 			EnvVars:  []string{"RECORED_MYSQL_DSN"},
-		},
+		}),
-		&cli.BoolFlag{
+		altsrc.NewBoolFlag(&cli.BoolFlag{
 			Name:  "debug",
 			Usage: "enable debug mode",
 			Value: false,
@@ -38,16 +37,21 @@ func main() {
 				}
 				return nil
 			},
-		},
+		}),
 	}
 
 	app := &cli.App{
 		Name:  "reCoreD-UI",
 		Usage: "Web UI for CoreDNS",
+		UseShortOptionHandling: true,
 		Before: altsrc.InitInputSourceWithContext(
 			flags, altsrc.NewYamlSourceFromFlagFunc("config"),
 		),
 		Flags: flags,
+		Commands: []*cli.Command{
+			server.Command,
+			config.Command,
+		},
 	}
 
 	if err := app.Run(os.Args); err != nil {