rotating_file_handler unable to log to /dev/null

[dirocco]

After upgrading from 1.6.3 to 2.9.0, I'm no longer able to use "/dev/null" as a file name for quill::rotating_file_hander. This is useful for exercising quill and custom fmt types during tests without actually writing to disk.

The error is in quill/src/detail/misc/FileUtilities.cpp where std::filesystem::file_size throws an uncaught exception when RotatingFileHandler.cpp tries to set _current_size:
size_t file_size(fs::path const& filename) { return static_cast<size_t>(fs::file_size(filename)); }

Here is the exception text:
filesystem error: cannot get file size: Operation not supported [/dev/null]

[odygrd]

hey, thanks for reporting this. I have added support to RotatingFileHandler and TimeRotatingFileHandler for /dev/null in latest master.

I have also added the NullHandler class.

Another way to skip logs completely is to never call quill::start() in your testing, that way the logs are only pushed to the unbounded queues but are never processed. But for more complete regression testing it's better to use /dev/null or the NullHandler as it will also process the log statements during your testing.

[odygrd]

fix is in v2.9.1. closing for now, if you have any issues let me know