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logger.go
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logger.go
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package log
import (
"bufio"
"fmt"
rotatelogs "github.com/lestrrat-go/file-rotatelogs"
"github.com/pkg/errors"
"github.com/rifflock/lfshook"
log "github.com/sirupsen/logrus"
"io"
"os"
"path/filepath"
"time"
)
const (
logFileName = "lc.log"
)
func InitLogger(dir, logLevel string) (io.Writer, error) {
logDir := filepath.Join(dir, "logs")
_, err := os.Stat(logDir)
if os.IsNotExist(err) {
err = os.MkdirAll(logDir, 0755)
if err != nil {
return nil, err
}
}
baseLogPath := filepath.Join(logDir, logFileName)
writer, err := rotatelogs.New(
baseLogPath+".%Y%m%d%H%M",
rotatelogs.WithLinkName(baseLogPath), // generate soft-link,point the latest log
rotatelogs.WithMaxAge(7*24*time.Hour), // maximum file storage time
rotatelogs.WithRotationTime(24*time.Hour), // log cutting interval
)
if err != nil {
return nil, errors.Wrap(err, "create rotatelogs failed")
}
//log.SetFormatter(&log.TextFormatter{})
switch logLevel {
// if the log level is not debug, do not print the log to the console
case "debug":
log.SetLevel(log.DebugLevel)
log.SetOutput(os.Stderr)
case "info":
setNull()
log.SetLevel(log.InfoLevel)
case "warn":
setNull()
log.SetLevel(log.WarnLevel)
case "error":
setNull()
log.SetLevel(log.ErrorLevel)
default:
setNull()
log.SetLevel(log.InfoLevel)
}
lfHook := lfshook.NewHook(lfshook.WriterMap{
log.DebugLevel: writer, // set different output purposes for different levels
log.InfoLevel: writer,
log.WarnLevel: writer,
log.ErrorLevel: writer,
log.FatalLevel: writer,
log.PanicLevel: writer,
}, &log.TextFormatter{})
log.AddHook(lfHook)
return writer, nil
}
func setNull() {
src, err := os.OpenFile(os.DevNull, os.O_APPEND|os.O_WRONLY, os.ModeAppend)
if err != nil {
fmt.Println("err", err)
}
writer := bufio.NewWriter(src)
log.SetOutput(writer)
}