Reload the config file on SIGHUP

bot/bot.go

@@ -76,7 +76,8 @@ func (b *Bot) RegisterHandlers() {
 }
 
 func Run() error {
-	setupConfig()
+	initConfig()
+	go reloadConfig()
 
 	if err := lib.SeedMathRand(); err != nil {
 		log.Warn(err)
@@ -97,8 +98,7 @@ func Run() error {
 
 	dg.Identify.Intents = discordgo.IntentsGuildMessages | discordgo.IntentsDirectMessages
 
-	err = dg.Open()
-	if err != nil {
+	if err = dg.Open(); err != nil {
 		log.Fatalf("error opening connection: %v\n", err)
 	}
 
@@ -115,9 +115,7 @@ func Run() error {
 	return nil
 }
 
-func setupConfig() {
-	var err error
-
+func initConfig() {
 	C = NewConfig()
 
 	viper.SetEnvPrefix("BEEPBOOP")
@@ -127,22 +125,43 @@ func setupConfig() {
 	viper.SetConfigType("toml")
 	viper.AddConfigPath(".")
 
-	viper.BindEnv("DEBUG")
+	viper.SetDefault("debug", false)
+
 	viper.BindEnv("DISCORD_TOKEN")
 	viper.BindEnv("OPEN_WEATHER_MAP_TOKEN")
 
+	loadConfig()
+}
+
+func loadConfig() {
 	if err := viper.ReadInConfig(); err != nil {
 		if _, ok := err.(viper.ConfigFileNotFoundError); !ok {
 			log.Fatalf("fatal error config file: %v", err)
 		}
 	}
 
-	err = viper.Unmarshal(&C)
+	log.WithField("filename", viper.ConfigFileUsed()).Info(
+		"loaded configuration file",
+	)
+
+	err := viper.Unmarshal(&C)
 	if err != nil {
 		log.Fatalf("unable to decode into struct: %v", err)
 	}
 
 	if viper.GetBool("debug") {
 		log.SetLevel(log.DebugLevel)
+	} else {
+		log.SetLevel(log.InfoLevel)
+	}
+}
+
+func reloadConfig() {
+	sc := make(chan os.Signal, 1)
+	signal.Notify(sc, syscall.SIGHUP)
+	for {
+		<-sc
+
+		loadConfig()
 	}
 }