feat: add validate-config command

.golangci.yml

@@ -48,3 +48,4 @@ linters:
     - ifshort
     - gci
     - depguard
+    - mnd

cmd/cosmos-node-exporter.go

@@ -13,7 +13,7 @@ var (
 	version = "unknown"
 )
 
-func Execute(configPath string) {
+func ExecuteMain(configPath string) {
 	appConfig, err := config.GetConfig(configPath)
 	if err != nil {
 		logger.GetDefaultLogger().Fatal().Err(err).Msg("Could not load config")
@@ -37,15 +37,37 @@ func Execute(configPath string) {
 	}
 }
 
+func ExecuteValidateConfig(configPath string) {
+	appConfig, err := config.GetConfig(configPath)
+	if err != nil {
+		logger.GetDefaultLogger().Fatal().Err(err).Msg("Could not load config!")
+	}
+
+	if err = appConfig.Validate(); err != nil {
+		logger.GetDefaultLogger().Fatal().Err(err).Msg("Provided config is invalid!")
+	}
+
+	logger.GetDefaultLogger().Info().Msg("Provided config is valid.")
+}
+
 func main() {
 	var ConfigPath string
 
 	rootCmd := &cobra.Command{
-		Use:     "cosmos-node-exporter",
+		Use:     "cosmos-node-exporter --config [config path]",
 		Long:    "A Prometheus scraper to return data about fullnode sync status and present upgrades.",
 		Version: version,
 		Run: func(cmd *cobra.Command, args []string) {
-			Execute(ConfigPath)
+			ExecuteMain(ConfigPath)
+		},
+	}
+
+	validateConfigCmd := &cobra.Command{
+		Use:     "validate-config --config [config path]",
+		Long:    "Validate config.",
+		Version: version,
+		Run: func(cmd *cobra.Command, args []string) {
+			ExecuteValidateConfig(ConfigPath)
 		},
 	}
 
@@ -54,6 +76,13 @@ func main() {
 		logger.GetDefaultLogger().Fatal().Err(err).Msg("Could not set flag as required")
 	}
 
+	validateConfigCmd.PersistentFlags().StringVar(&ConfigPath, "config", "", "Config file path")
+	if err := validateConfigCmd.MarkPersistentFlagRequired("config"); err != nil {
+		logger.GetDefaultLogger().Fatal().Err(err).Msg("Could not set flag as required")
+	}
+
+	rootCmd.AddCommand(validateConfigCmd)
+
 	if err := rootCmd.Execute(); err != nil {
 		logger.GetDefaultLogger().Fatal().Err(err).Msg("Could not start application")
 	}