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file.go
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file.go
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package logger
import (
"io"
"os"
"path/filepath"
"time"
"github.com/rs/zerolog/diode"
"gopkg.in/natefinch/lumberjack.v2"
)
type FileConfig struct {
// MaxSize is the maximum size in megabytes of the log file before it gets
// rotated. It defaults to 100 megabytes.
MaxSize int
// MaxAge is the maximum number of days to retain old log files based on the
// timestamp encoded in their filename. Note that a day is defined as 24
// hours and may not exactly correspond to calendar days due to daylight
// savings, leap seconds, etc. The default is not to remove old log files
// based on age.
MaxAge int
// MaxBackups is the maximum number of old log files to retain. The default
// is to retain all old log files (though MaxAge may still cause them to get
// deleted.)
MaxBackups int
// LocalTime determines if the time used for formatting the timestamps in
// backup files is the computer's local time. The default is to use UTC
// time.
LocalTime bool
// Compress determines if the rotated log files should be compressed
// using gzip. The default is not to perform compression.
Compress bool
}
func File(filename string, c FileConfig) (io.Writer, error) {
if err := os.MkdirAll(filepath.Dir(filename), 0744); err != nil {
return nil, err
}
fd := &lumberjack.Logger{
Filename: filename,
MaxSize: c.MaxSize,
MaxBackups: c.MaxBackups,
MaxAge: c.MaxAge,
Compress: c.Compress,
LocalTime: c.LocalTime,
}
return diode.NewWriter(fd, 1000, 10*time.Millisecond, nil), nil
}