Serilog-EnvironmentVariableLoggingLevelSwitch

README.md

Usage

Log.Logger = new LoggerConfiguration()
    .MinimumLevel.ControlledBy(new EnvironmentVariableLoggingLevelSwitch("LOG_LEVEL"))
    .CreateLogger();

EnvironmentVariableLoggingLevelSwitch.cs

public class EnvironmentVariableLoggingLevelSwitch : LoggingLevelSwitch
{
    public EnvironmentVariableLoggingLevelSwitch(string environmentVariable,
        LogEventLevel defaultLevel = LogEventLevel.Information)
    {
        MinimumLevel =
            Enum.TryParse<LogEventLevel>(Environment.GetEnvironmentVariable(environmentVariable), true,
                out var level)
                ? level
                : defaultLevel;

#if DEBUG
        MinimumLevel = LogEventLevel.Debug;
#endif
    }