Feature Request : Callback before log file deletion

[akshaynotes]

Problem :

So, my lumberjack logger has rotation based on size (10 MB) and MaxBackups I am using is 32. I am uploading these log files every hour to my server and I delete the log files which are already uploaded. The problem I am facing is if before triggering my cron job the file count exceeds 32 lumberjack will start deleting the files and I am losing those files (cant upload to the server as lumberjack has deleted them).

Feature Request :

I want a callback function which I can pass while initializing logger, which will get triggered just before deleting the logger file
callback(string filename){
//1. check if this file was uploaded
//2. if not upload
//3. if yes -> continue
}

Thanks !!