allow argumentless flags

docs/markdown/backend/options.md

@@ -18,6 +18,8 @@ backend:
 
 In this example, whenever `autorestic` runs `restic backup` it will append a `--tag abc --tag` to the native command.
 
-For more detail see the [location docs](/location/options) for options, as they are the same
+For more detail see the [location docs](/location/options) for options, as they are the same.
+
+> For flags without arguments you can set them to `true`. They will be handled accordingly.
 
 > :ToCPrevNext

docs/markdown/location/options.md

@@ -18,4 +18,6 @@ locations:
 
 In this example, whenever `autorestic` runs `restic backup` it will append a `--tag abc --tag` to the native command.
 
+> For flags without arguments you can set them to `true`. They will be handled accordingly.
+
 > :ToCPrevNext

internal/config.go

@@ -239,7 +239,18 @@ func getOptions(options Options, key string) []string {
 	var selected []string
 	for k, values := range options[key] {
 		for _, value := range values {
-			selected = append(selected, fmt.Sprintf("--%s", k), value)
+			// Bool
+			asBool, ok := value.(bool)
+			if ok && asBool {
+				selected = append(selected, fmt.Sprintf("--%s", k))
+				continue
+			}
+			// String
+			asString, ok := value.(string)
+			if ok {
+				selected = append(selected, fmt.Sprintf("--%s", k), asString)
+				continue
+			}
 		}
 	}
 	return selected

internal/location.go

@@ -30,7 +30,7 @@ type Hooks struct {
 	Failure HookArray `yaml:"failure,omitempty"`
 }
 
-type Options map[string]map[string][]string
+type Options map[string]map[string][]interface{}
 
 type Location struct {
 	name    string   `yaml:",omitempty"`