A wrapper on top of Golang log package which includes levelling and rotated file output. Complete documentation at Godoc.
Following example uses default logger implementation.
import "github.com/arknable/log"
... etc
l := log.New()
l.Debug("This is a debug message")
l.Info("This is", "an info message")
l.Warning("This is a warning message")
l.Error("This is", "an error message")
There is also package-level logger.
import "github.com/arknable/log"
... etc
log.Debug("This is a debug message")
log.Info("This is", "an info message")
log.Warning("This is a warning message")
log.Error("This is", "an error message")
By default, log messages sent to stdout. To use custom output use SetOutput() function of the logger.
import "github.com/arknable/log"
... etc
file, err := os.Open(......)
if err != nil {
log.Fatal(err)
}
defer file.Close()
l := log.New()
l.SetOutput(io.MultiWriter(os.Stdout, file))
or you can set custom output to package-level logger.
import "github.com/arknable/log"
... etc
file, err := os.Open(......)
if err != nil {
log.Fatal(err)
}
defer file.Close()
log.SetOutput(io.MultiWriter(os.Stdout, file))
If you need file output that has name rolled every day, there is function DailyFileOutput.
import "github.com/arknable/log"
... etc
file, err := DailyFileOutput("test_daily_file", "./")
if err != nil {
t.Fatal(err)
}
defer file.Close()
logger := New()
logger.SetOutput(io.MultiWriter(os.Stdout, file))
2021/03/23 05:35:19 DEBUG This is a debug message
2021/03/23 05:35:19 INFO This is an info message
2021/03/23 05:35:19 WARNING This is a warning message
2021/03/23 05:35:19 ERROR This is an error message
2021/03/23 05:35:19 DEBUG This is a debugf message
2021/03/23 05:35:19 INFO This is an infof message
2021/03/23 05:35:19 WARNING This is a warningf message
2021/03/23 05:35:19 ERROR This is an errorf message