fs: Add Exclusive parameter to Option to choose Examples only #3455

fs/backend_config.go

@@ -161,6 +161,7 @@ func ConfigConfirm(state string, Default bool, name string, help string) (*Confi
 				Value: "false",
 				Help:  "No",
 			}},
+			Exclusive: true,
 		},
 	}, nil
 }
@@ -185,6 +186,7 @@ func ConfigChooseFixed(state string, name string, help string, items []OptionExa
 			Name:      name,
 			Help:      help,
 			Examples:  items,
+			Exclusive: true,
 		},
 	}
 	choose.Option.Default = choose.Option.Examples[0].Value

fs/config/ui.go

@@ -402,7 +402,7 @@ func ChooseOption(o *fs.Option, name string) string {
 					help = append(help, example.Help)
 				}
 			}
-			in = Choose(o.Name, values, help, true)
+			in = Choose(o.Name, values, help, !o.Exclusive)
 		} else {
 			fmt.Printf("%s> ", o.Name)
 			in = ReadLine()

fs/fs.go

@@ -184,6 +184,7 @@ type Option struct {
 	IsPassword bool             // set if the option is a password
 	NoPrefix   bool             // set if the option for this should not use the backend prefix
 	Advanced   bool             // set if this is an advanced config option
+	Exclusive  bool             // set if the answer can only be one of the examples
 }
 
 // BaseOption is an alias for Option used internally

fs/fs_test.go

@@ -242,6 +242,7 @@ func TestOptionMarshalJSON(t *testing.T) {
 "IsPassword": false,
 "NoPrefix": false,
 "Advanced": true,
+"Exclusive": false,
 "DefaultStr": "false",
 "ValueStr": "true",
 "Type": "bool"