Embed Seeds

// InterceptConfigsPreRunHandler performs a pre-run function for the root daemon
// application command. It will create a Viper literal and a default server
// Context. The server Tendermint configuration will either be read and parsed
// or created and saved to disk, where the server Context is updated to reflect
// the Tendermint configuration. The Viper literal is used to read and parse
// the application configuration. Command handlers can fetch the server Context
// to get the Tendermint configuration or to get access to Viper.
func InterceptConfigsPreRunHandler(cmd *cobra.Command) error {
	serverCtx := NewDefaultContext()

	// Get the executable name and configure the viper instance so that environmental
	// variables are checked based off that name. The underscore character is used
	// as a separator
	executableName, err := os.Executable()
	if err != nil {
		return err
	}

	basename := path.Base(executableName)

	// Configure the viper instance
	serverCtx.Viper.BindPFlags(cmd.Flags())
	serverCtx.Viper.BindPFlags(cmd.PersistentFlags())
	serverCtx.Viper.SetEnvPrefix(basename)
	serverCtx.Viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_", "-", "_"))
	serverCtx.Viper.AutomaticEnv()

	// intercept configuration files, using both Viper instances separately
	config, err := interceptConfigs(serverCtx.Viper)
	if err != nil {
		return err
	}

	// return value is a tendermint configuration object
	serverCtx.Config = config
	if err = bindFlags(basename, cmd, serverCtx.Viper); err != nil {
		return err
	}

	var logWriter io.Writer
	if strings.ToLower(serverCtx.Viper.GetString(flags.FlagLogFormat)) == tmcfg.LogFormatPlain {
		logWriter = zerolog.ConsoleWriter{Out: os.Stderr}
	} else {
		logWriter = os.Stderr
	}

	logLvlStr := serverCtx.Viper.GetString(flags.FlagLogLevel)
	logLvl, err := zerolog.ParseLevel(logLvlStr)
	if err != nil {
		return fmt.Errorf("failed to parse log level (%s): %w", logLvlStr, err)
	}

	serverCtx.Logger = ZeroLogWrapper{zerolog.New(logWriter).Level(logLvl).With().Timestamp().Logger()}

	return SetCmdServerContext(cmd, serverCtx)
}