slag

Overview ¶

Package slag provides a method for setting the log level from the command line.

func main() {
	var level slag.Level
	flag.Var(&level, "log-level", "log level")
	flag.Parse()
	slog.SetDefault(slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{Level: &level})))
}

See [./examples/logger](./examples/logger) for a full example.

This allows the log level to be set from the command line:

$ ./myprogram -log-level=debug

The slag.Level type is a wrapper around slog.Level that implements the flag.Value interface.