Add tea login delete (#296)

add `tea login delete`

alias to tea logout

Co-authored-by: Norwin Roosen <git@nroo.de>
Reviewed-on: https://gitea.com/gitea/tea/pulls/296
Reviewed-by: khmarbaise <khmarbaise@noreply.gitea.io>
Reviewed-by: 6543 <6543@obermui.de>
Co-Authored-By: Norwin <noerw@noreply.gitea.io>
Co-Committed-By: Norwin <noerw@noreply.gitea.io>

cmd/logout.go

@@ -1,14 +1,11 @@
-// Copyright 2018 The Gitea Authors. All rights reserved.
+// Copyright 2020 The Gitea Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
 package cmd
 
 import (
-	"errors"
-	"log"
-
-	"code.gitea.io/tea/modules/config"
+	"code.gitea.io/tea/cmd/login"
 
 	"github.com/urfave/cli/v2"
 )
@@ -18,33 +15,6 @@ var CmdLogout = cli.Command{
 	Name:        "logout",
 	Usage:       "Log out from a Gitea server",
 	Description: `Log out from a Gitea server`,
-	Action:      runLogout,
-	Flags: []cli.Flag{
-		&cli.StringFlag{
-			Name:    "name",
-			Aliases: []string{"n"},
-			Usage:   "Login name to remove",
-		},
-	},
-}
-
-func runLogout(ctx *cli.Context) error {
-	logins, err := config.GetLogins()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	var name string
-
-	if ctx.IsSet("name") {
-		name = ctx.String("name")
-	} else if len(ctx.Args().First()) != 0 {
-		name = ctx.Args().First()
-	} else if len(logins) == 1 {
-		name = logins[0].Name
-	} else {
-		return errors.New("Please specify a login name")
-	}
-
-	return config.DeleteLogin(name)
+	ArgsUsage:   "<login name>",
+	Action:      login.RunLoginDelete,
 }