feat: implement login/logout UX

cmd/notation/login.go

@@ -24,9 +24,9 @@ func loginCommand(opts *loginOpts) *cobra.Command {
 		opts = &loginOpts{}
 	}
 	command := &cobra.Command{
-		Use:   "login [options] [server]",
-		Short: "Provides credentials for authenticated registry operations",
-		Long: `notation login [options] [server]
+		Use:   "login [flags] <server>",
+		Short: "Login to registry",
+		Long: `Log in to an OCI registry
 
 Example - Login with provided username and password:
 	notation login -u <user> -p <password> registry.example.com
@@ -50,7 +50,7 @@ Example - Login using $NOTATION_USERNAME $NOTATION_PASSWORD variables:
 			return runLogin(cmd, opts)
 		},
 	}
-	command.Flags().BoolVar(&opts.passwordStdin, "password-stdin", false, "Take the password from stdin")
+	command.Flags().BoolVar(&opts.passwordStdin, "password-stdin", false, "take the password from stdin")
 	opts.ApplyFlags(command.Flags())
 	return command
 }
@@ -67,6 +67,7 @@ func runLogin(cmd *cobra.Command, opts *loginOpts) error {
 	if err != nil {
 		return fmt.Errorf("could not get the credentials store: %v", err)
 	}
+
 	// init creds
 	creds := newCredentialFromInput(
 		opts.Username,
@@ -75,6 +76,8 @@ func runLogin(cmd *cobra.Command, opts *loginOpts) error {
 	if err = nativeStore.Store(serverAddress, creds); err != nil {
 		return fmt.Errorf("failed to store credentials: %v", err)
 	}
+
+	fmt.Println("Login Succeeded")
 	return nil
 }
 

cmd/notation/logout.go

@@ -16,8 +16,8 @@ func logoutCommand(opts *logoutOpts) *cobra.Command {
 		opts = &logoutOpts{}
 	}
 	return &cobra.Command{
-		Use:   "logout [server]",
-		Short: "Log out the specified registry hostname",
+		Use:   "logout [flags] <server>",
+		Short: "Log out from the logged in registries",
 		Args: func(cmd *cobra.Command, args []string) error {
 			if len(args) == 0 {
 				return errors.New("no hostname specified")

cmd/notation/main.go

@@ -21,7 +21,6 @@ func main() {
 		pluginCommand(),
 		loginCommand(nil),
 		logoutCommand(nil))
-
 	if err := cmd.Execute(); err != nil {
 		log.Fatal(err)
 	}

specs/commandline/logout.md

@@ -7,15 +7,13 @@ Use `notation logout` to log out from an OCI registry.
 ## Outline
 
 ```text
-Log out from an OCI registry
+Log out from the logged in registries
 
 Usage:
-  notation logout [flags] [server]
+  notation logout [flags] <server>
 
 Flags:
-      --all           log out from all logged in registries
   -h, --help          help for logout
-      --plain-http    registry access via plain HTTP
 ```
 
 ## Usage