fix(config): failed reload should not start providers in new state

internal/config/events.go

@@ -39,12 +39,12 @@ func Load() error {
 	state := NewState()
 	cfgWatcher = watcher.NewConfigFileWatcher(common.ConfigFileName)
 
-	err := state.InitFromFileOrExit(common.ConfigPath)
+	err := errors.Join(state.InitFromFileOrExit(common.ConfigPath), state.StartProviders())
 	if err != nil {
 		notifyError("init", err)
 	}
 	SetState(state)
-	return err
+	return nil
 }
 
 func notifyError(action string, err error) {
@@ -72,6 +72,12 @@ func Reload() gperr.Error {
 	// -> replace config -> start new subtasks
 	GetState().Task().FinishAndWait("config changed")
 	SetState(newState)
+
+	if err := newState.StartProviders(); err != nil {
+		gperr.LogWarn("start providers error", err)
+		notifyError("start providers", err)
+		return nil // continue
+	}
 	StartProxyServers()
 	return nil
 }

internal/config/state.go

@@ -108,8 +108,6 @@ func (state *state) Init(data []byte) error {
 	errs.Add(state.initNotification())
 	errs.Add(state.initAccessLogger())
 	errs.Add(state.initEntrypoint())
-	// this must be run after loadRouteProviders
-	errs.Add(state.startRouteProviders())
 	return errs.Error()
 }
 
@@ -155,6 +153,16 @@ func (state *state) IterProviders() iter.Seq2[string, types.RouteProvider] {
 	}
 }
 
+func (state *state) StartProviders() error {
+	errs := gperr.NewGroup("provider errors")
+	for _, p := range state.providers.Range {
+		errs.Go(func() error {
+			return p.Start(state.Task())
+		})
+	}
+	return errs.Wait().Error()
+}
+
 func (state *state) NumProviders() int {
 	return state.providers.Size()
 }
@@ -390,13 +398,3 @@ func (state *state) printState() {
 	l := log.Level(zerolog.InfoLevel)
 	yaml.NewEncoder(l).Encode(state.Config)
 }
-
-func (state *state) startRouteProviders() error {
-	errs := gperr.NewGroup("provider errors")
-	for _, p := range state.providers.Range {
-		errs.Go(func() error {
-			return p.Start(state.Task())
-		})
-	}
-	return errs.Wait().Error()
-}

internal/config/types/state.go

@@ -28,6 +28,7 @@ type State interface {
 	DeleteProvider(key string)
 	IterProviders() iter.Seq2[string, types.RouteProvider]
 	NumProviders() int
+	StartProviders() error
 }
 
 // could be nil