logger.go

package logger

import (
	"os"

	"github.com/15972158793/gin-app/setting"

	"github.com/natefinch/lumberjack"

	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
)

var lg *zap.Logger

func SetUp() (err error) {
	writeSyncer := getLogWriter(setting.AppConfig.LogConfig.Filename, setting.AppConfig.LogConfig.MaxSize, setting.AppConfig.LogConfig.MaxBackups, setting.AppConfig.LogConfig.MaxAge)
	encoder := getEncoder()
	var l = new(zapcore.Level)
	err = l.UnmarshalText([]byte(setting.AppConfig.LogConfig.Level))
	if err != nil {
		return
	}
	// 区分开发模式和发布模式下的日志
	var core zapcore.Core
	if setting.AppConfig.Mode == "debug" {
		consoleEncoder := zapcore.NewConsoleEncoder(zap.NewDevelopmentEncoderConfig())
		// 也可以开发阶段同时写入文件和控制台
		//core = zapcore.NewTee(
		//	zapcore.NewCore(consoleEncoder, zapcore.Lock(os.Stdout), zapcore.DebugLevel),
		//	zapcore.NewCore(encoder, writeSyncer, l),
		//)
		core = zapcore.NewCore(consoleEncoder, zapcore.Lock(os.Stdout), zapcore.DebugLevel)
	} else {
		core = zapcore.NewCore(encoder, writeSyncer, l)
	}

	lg = zap.New(core, zap.AddCaller())
	zap.ReplaceGlobals(lg) // 替换zap包中全局的logger实例，后续在其他包中只需使用zap.L()调用即可
	return
}

func getEncoder() zapcore.Encoder {
	encoderConfig := zap.NewProductionEncoderConfig()
	encoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
	encoderConfig.TimeKey = "time"
	encoderConfig.EncodeLevel = zapcore.CapitalLevelEncoder
	encoderConfig.EncodeDuration = zapcore.SecondsDurationEncoder
	encoderConfig.EncodeCaller = zapcore.ShortCallerEncoder
	return zapcore.NewJSONEncoder(encoderConfig)
}

func getLogWriter(filename string, maxSize, maxBackup, maxAge int) zapcore.WriteSyncer {
	lumberJackLogger := &lumberjack.Logger{
		Filename:   filename,
		MaxSize:    maxSize,
		MaxBackups: maxBackup,
		MaxAge:     maxAge,
	}
	return zapcore.AddSync(lumberJackLogger)
}