Logger

A simple prefixer logger that can wrap several backends. The formatters/handlers from this repository must be used in order to make prefix work.

Interface

type Logger interface {
	WithPrefix(prefix string) Logger
	WithPrefixf(format string, args ...interface{}) Logger
	WithField(key string, value interface{}) Logger
	WithError(error error) Logger
	WithFields(fields map[string]interface{}) Logger
	//
	Debug(args ...interface{})
	Debugf(format string, args ...interface{})
	Info(args ...interface{})
	Infof(format string, args ...interface{})
	Warn(args ...interface{})
	Warnf(format string, args ...interface{})
	Error(args ...interface{})
	Errorf(format string, args ...interface{})
	//
	Print(args ...interface{})
	Printf(format string, args ...interface{})
	Println(args ...interface{})
	Fatal(args ...interface{})
	Fatalf(format string, args ...interface{})
	Fatalln(args ...interface{})
	Panic(args ...interface{})
	Panicf(format string, args ...interface{})
	Panicln(args ...interface{})
}

Backends

• Logrus with logger.WrapLogrus(l *logrus.Logger) function
• slog with logger.WrapSlog(l *slog.Logger) function
  • slog_gelf_handler.go can be used independently
  • slog_text_handler.go (logrus format) can be used independently

Helpers

• type M map[string]interface{} used as a shorthand for a map of interfaces used by WithFields method
• func WithLogger(ctx context.Context, l Logger) context.Context to embeds the logger inside a context
• func LogWith(ctx context.Context) Logger to extract a logger from a context

License

MIT

Contributing

All PRs are welcome.

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request