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package logging
import (
"fmt"
"io"
"os"
logrus_stack "github.com/Gurpartap/logrus-stack"
"github.com/sirupsen/logrus"
"github.com/authelia/authelia/v4/internal/configuration/schema"
)
// Logger returns the standard logrus logger.
func Logger() *logrus.Logger {
return logrus.StandardLogger()
}
// InitializeLogger configures the default logger similar to ConfigureLogger but also configures the stack levels hook.
func InitializeLogger(config schema.Log, log bool) (err error) {
initializeStackTracer(config)
return ConfigureLogger(config, log)
}
func initializeStackTracer(config schema.Log) {
// Ensure the stack trace hook is only initialized once.
stacktrace.Do(func() {
var (
callerLevels, stackLevels []logrus.Level
)
switch LogLevel(config.Level).Level() {
case logrus.DebugLevel:
stackLevels = []logrus.Level{logrus.PanicLevel, logrus.FatalLevel, logrus.ErrorLevel}
case logrus.TraceLevel:
stackLevels = []logrus.Level{logrus.PanicLevel, logrus.FatalLevel, logrus.ErrorLevel}
callerLevels = logrus.AllLevels
default:
stackLevels = []logrus.Level{logrus.PanicLevel, logrus.FatalLevel}
}
logrus.AddHook(logrus_stack.NewHook(callerLevels, stackLevels))
})
}
// ConfigureLogger configures the default loggers level, formatting, and the output destinations.
func ConfigureLogger(config schema.Log, log bool) (err error) {
setLevelStr(config.Level, log)
switch config.Format {
case FormatJSON:
logrus.SetFormatter(&logrus.JSONFormatter{})
default:
logrus.SetFormatter(&logrus.TextFormatter{})
}
var writers []io.Writer
switch {
case config.FilePath != "":
lf = NewFile(config.FilePath)
if err = lf.Open(); err != nil {
return err
}
if config.Format != FormatJSON {
logrus.SetFormatter(&logrus.TextFormatter{
DisableColors: true,
FullTimestamp: true,
})
}
writers = []io.Writer{lf}
if config.KeepStdout {
writers = append(writers, os.Stdout)
}
default:
writers = []io.Writer{os.Stdout}
}
logrus.SetOutput(io.MultiWriter(writers...))
return nil
}
// Reopen handles safely reopening the log file.
func Reopen() (err error) {
if lf == nil {
return fmt.Errorf("error reopening log file: file is not configured or open")
}
return lf.Reopen()
}
func setLevelStr(level string, log bool) {
logrus.SetLevel(LogLevel(level).Level())
if log {
logrus.Infof("Log severity set to %s", level)
}
}
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