Use typed enums for cleaner parsing.

internal/configparser/schema.go

@@ -15,12 +15,12 @@ type Config struct {
 
 // These top-level structs use custom unmarshaling to unpack each available sub-type
 type DeviceConfig struct {
-	Type   string
+	Type   DeviceType
 	Config interface{}
 }
 
 type RuleConfig struct {
-	Type   string
+	Type   RuleType
 	Name   string
 	Modes  []string
 	Config interface{}
@@ -119,7 +119,7 @@ type RuleTargetConfigModeSelect struct {
 
 func (dc *DeviceConfig) UnmarshalYAML(unmarshal func(data interface{}) error) error {
 	metaConfig := &struct {
-		Type string
+		Type DeviceType
 	}{}
 	err := unmarshal(metaConfig)
 	if err != nil {
@@ -145,7 +145,7 @@ func (dc *DeviceConfig) UnmarshalYAML(unmarshal func(data interface{}) error) er
 
 func (dc *RuleConfig) UnmarshalYAML(unmarshal func(data interface{}) error) error {
 	metaConfig := &struct {
-		Type  string
+		Type  RuleType
 		Name  string
 		Modes []string
 	}{}

internal/configparser/variables.go

@@ -1,15 +1,21 @@
 package configparser
 
-const (
-	DeviceTypePhysical = "physical"
-	DeviceTypeVirtual  = "virtual"
+type DeviceType string
 
-	RuleTypeButton        = "button"
-	RuleTypeButtonCombo   = "button-combo"
-	RuleTypeButtonLatched = "button-latched"
-	RuleTypeAxis          = "axis"
-	RuleTypeAxisCombined  = "axis-combined"
-	RuleTypeAxisToButton  = "axis-to-button"
-	RuleTypeAxisToRelaxis = "axis-to-relaxis"
-	RuleTypeModeSelect    = "mode-select"
+const (
+	DeviceTypePhysical DeviceType = "physical"
+	DeviceTypeVirtual  DeviceType = "virtual"
+)
+
+type RuleType string
+
+const (
+	RuleTypeButton        RuleType = "button"
+	RuleTypeButtonCombo   RuleType = "button-combo"
+	RuleTypeButtonLatched RuleType = "button-latched"
+	RuleTypeAxis          RuleType = "axis"
+	RuleTypeAxisCombined  RuleType = "axis-combined"
+	RuleTypeAxisToButton  RuleType = "axis-to-button"
+	RuleTypeAxisToRelaxis RuleType = "axis-to-relaxis"
+	RuleTypeModeSelect    RuleType = "mode-select"
 )