logging/logging.go

package logging

import (
	"log"

	"git.loafle.net/commons_go/config"

	"go.uber.org/zap"
)

var logger *zap.SugaredLogger

func Logger() *zap.SugaredLogger {
	if nil == logger {
		log.Panicf("Initialize Logger first to use Logger")
	}
	return logger
}

func InitializeLogger(configPath string) error {
	var (
		cfg     zap.Config
		_logger *zap.Logger
		err     error
	)

	conf := config.New()

	if err = conf.Load(&cfg, configPath); nil != err {
		log.Printf("Loading of logger config has been failed [%v]", err)
		if _logger, err = zap.NewDevelopment(); nil != err {
			return err
		}
		logger = _logger.Sugar()
		logger.Infof("Logger has been initialized as development mode")
		return nil
	}

	if _logger, err = cfg.Build(); nil != err {
		return err
	}
	logger = _logger.Sugar()

	return nil
}