gickup/logger/logger.go

package logger

import (
	"io"
	"os"
	"path"

	"gickup/types"

	"github.com/rs/zerolog"
	"github.com/rs/zerolog/log"
	"gopkg.in/natefinch/lumberjack.v2"
)

func NewRollingFile(config types.FileLogging) io.Writer {
	if config.Dir != "" {
		if err := os.MkdirAll(config.Dir, 0744); err != nil {
			log.Error().Err(err).Str("path", config.Dir).Msg("can't create log directory")
			return nil
		}
	} else {
		config.Dir = "."
	}

	return &lumberjack.Logger{
		Filename: path.Join(config.Dir, config.File),
		MaxAge:   config.MaxAge, // days
	}
}

func CreateLogger(conf types.Logging) zerolog.Logger {
	var writers []io.Writer

	writers = append(writers, zerolog.ConsoleWriter{Out: os.Stderr, TimeFormat: conf.Timeformat})
	if conf.FileLogging.File != "" {
		writers = append(writers, NewRollingFile(conf.FileLogging))
	}
	mw := io.MultiWriter(writers...)

	return zerolog.New(mw).With().Timestamp().Logger()
}