Tariffs: swallow startup errors (#16258)

cmd/setup.go

@@ -760,12 +760,28 @@ func configureMessengers(conf globalconfig.Messaging, vehicles push.Vehicles, va
 	return messageChan, nil
 }
 
+func tariffInstance(name string, conf config.Typed) (api.Tariff, error) {
+	instance, err := tariff.NewFromConfig(conf.Type, conf.Other)
+	if err != nil {
+		var ce *util.ConfigError
+		if errors.As(err, &ce) {
+			return nil, err
+		}
+
+		// wrap non-config tariff errors to prevent fatals
+		log.ERROR.Printf("creating tariff %s failed: %v", name, err)
+		instance = tariff.NewWrapper(conf.Type, conf.Other, err)
+	}
+
+	return instance, nil
+}
+
 func configureTariff(name string, conf config.Typed, t *api.Tariff) error {
 	if conf.Type == "" {
 		return nil
 	}
 
-	res, err := tariff.NewFromConfig(conf.Type, conf.Other)
+	res, err := tariffInstance(name, conf)
 	if err != nil {
 		return &DeviceError{name, err}
 	}

tariff/wrapper.go

@@ -0,0 +1,40 @@
+package tariff
+
+import (
+	"fmt"
+
+	"github.com/evcc-io/evcc/api"
+)
+
+// Wrapper wraps an api.Tariff to capture initialization errors
+type Wrapper struct {
+	typ    string
+	config map[string]interface{}
+	err    error
+}
+
+// NewWrapper creates an offline tariff wrapper
+func NewWrapper(typ string, other map[string]interface{}, err error) api.Tariff {
+	v := &Wrapper{
+		typ:    typ,
+		config: other,
+		err:    fmt.Errorf("tariff not available: %w", err),
+	}
+
+	return v
+}
+
+// WrappedConfig indicates a device with wrapped configuration
+func (v *Wrapper) WrappedConfig() (string, map[string]interface{}) {
+	return v.typ, v.config
+}
+
+// Rates implements the api.Tariff interface
+func (t *Wrapper) Rates() (api.Rates, error) {
+	return nil, t.err
+}
+
+// Type implements the api.Tariff interface
+func (t *Wrapper) Type() api.TariffType {
+	return 0
+}

vehicle/wrapper.go

@@ -17,7 +17,7 @@ type Wrapper struct {
 }
 
 // NewWrapper creates an offline Vehicle wrapper
-func NewWrapper(name string, typ string, other map[string]interface{}, err error) api.Vehicle {
+func NewWrapper(name, typ string, other map[string]interface{}, err error) api.Vehicle {
 	var cc struct {
 		embed `mapstructure:",squash"`
 		Other map[string]interface{} `mapstructure:",remain"`
@@ -44,18 +44,11 @@ func NewWrapper(name string, typ string, other map[string]interface{}, err error
 	return v
 }
 
-// Error returns the initialization error
-func (v *Wrapper) Error() string {
-	return v.err.Error()
-}
-
-// Error returns the initialization error
-func (v *Wrapper) Config() (string, map[string]interface{}) {
+// WrappedConfig indicates a device with wrapped configuration
+func (v *Wrapper) WrappedConfig() (string, map[string]interface{}) {
 	return v.typ, v.config
 }
 
-var _ api.Vehicle = (*Wrapper)(nil)
-
 // SetTitle implements the api.TitleSetter interface
 func (v *Wrapper) SetTitle(title string) {
 	v.Title_ = title