How to disable a log.Logger

Question

I have some heavily instrumented code that makes use of the log package. Now it\'s come time to turn off the logging, and I can\'t determine how to turn off the

Answer 1

This approach allows you to turn logging on and off at runtime:

type LogWriter struct{
    enabled bool
}

func (l *LogWriter) Enable() {
    l.enabled = true
}

func (l *LogWriter) Disable() {
    l.enabled = false
}

func (l *LogWriter) Write([]byte) (int, error) {
    if l.enabled {
        //...
    }
    return 0, nil
}

And this approach enables or disables logging for the entire runtime:

type LogWriter struct{}

func (l *LogWriter) Write([]byte) (int, error) {
    if some.Constant {
        //...
    }
    return 0, nil
}

_{Where some.Constant would be either a constant that you set before compiling (producing a "production" binary) or a variable that is set only once when running the program via command-line flags (something like myprogram --enable-logging=true)}

With both approaches you can leave your current code almost entirely untouched.