How to change the log file name when using day-based rolling files in 4.0.0?

As you have announced recently, configuring rolling files is possible with the Serilog.Sinks.File package since version 4.0.0. Is there any way to configure the output format for file names when using day-based rolling files?

Consider the following logger configuration:

new LoggerConfiguration().WriteTo.File(filePath, rollingInterval: RollingInterval.Day);

When I set filePath to MyLog.log then the resulting file name would be MyLog20180329.log. How can I get to the following format: 2018-03-29 MyLog.log? The {Date} specifier that was present in Serilog.Sinks.RollingFile seems to be not supported in this package.

I’m currently migrating one of our services from Log4Net to Serilog and we would like to keep the existing name template for our log files.

Thanks for your help in advance!

[feO2x]

@nblumhardt When I placed {Date} in the pathFormat using only Serilog.Sinks.File 4.0.0 package, this was not resolved (the resulting log files were named “{Date} file20180522.log”). Currently, we use Serilog.Sinks.Rollingfile and stick with the date format without dashes.

[nblumhardt]

Hi @feO2x - thanks for the note.

The {Date} specifier used with RollingFile produces identical filenames to the ones used in this package (the internals are directly copied over from that codebase).

At present no filename customization is supported - it’s a reasonable requirement, but hasn’t ended up critical enough for a design to make its way through the works. How does it stand for you - is changing the filename format a viable option, or are you blocked on this one? Thanks!