refactor: urfave v2

cli/app/run.go

@@ -14,19 +14,21 @@ import (
 	"github.com/docker/cli/cli/command"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/filters"
-	"github.com/urfave/cli"
+	"github.com/urfave/cli/v2"
 )
 
 var user string
 var userFlag = &cli.StringFlag{
-	Name:        "user, u",
+	Name:        "user",
+	Aliases:     []string{"u"},
 	Value:       "",
 	Destination: &user,
 }
 
 var noTTY bool
 var noTTYFlag = &cli.BoolFlag{
-	Name:        "no-tty, t",
+	Name:        "no-tty",
+	Aliases:     []string{"t"},
 	Destination: &noTTY,
 }
 
@@ -45,11 +47,11 @@ var appRunCommand = cli.Command{
 	Action: func(c *cli.Context) error {
 		app := internal.ValidateApp(c)
 
-		if len(c.Args()) < 2 {
+		if c.Args().Len() < 2 {
 			internal.ShowSubcommandHelpAndError(c, errors.New("no <service> provided?"))
 		}
 
-		if len(c.Args()) < 3 {
+		if c.Args().Len() < 3 {
 			internal.ShowSubcommandHelpAndError(c, errors.New("no <args> provided?"))
 		}
 
@@ -68,7 +70,7 @@ var appRunCommand = cli.Command{
 			log.Fatal(err)
 		}
 
-		cmd := c.Args()[2:]
+		cmd := c.Args().Slice()[2:]
 		execCreateOpts := types.ExecConfig{
 			AttachStderr: true,
 			AttachStdin:  true,