logger with current timestamp

[reedgra]

I am replacing the inhouse logger with spdlog. Our logger has a timestamp of the app-start appended to the filename. Now I can see there is a daily option but is there one for creating a new log with the current timestamp? The format of the stamp if it is of use "appname-%Y%m%d%H%M%S.log"

I am aware that I may need to roll my own, is there any particular gotchas I need to be aware of?

[tt4g]

You can replace template argument FileNameCalc of daily_file_sink.

spdlog/include/spdlog/sinks/daily_file_sink.h

Lines 114 to 115 in b75edfa

	template<typename Mutex, typename FileNameCalc = daily_filename_calculator>
	class daily_file_sink final : public base_sink<Mutex>

spdlog/include/spdlog/sinks/daily_file_sink.h

Lines 25 to 38 in b75edfa

	/*
	* Generator of daily log file names in format basename.YYYY-MM-DD.ext
	*/
	struct daily_filename_calculator
	{
	// Create filename for the form basename.YYYY-MM-DD
	static filename_t calc_filename(const filename_t &filename, const tm &now_tm)
	{
	filename_t basename, ext;
	std::tie(basename, ext) = details::file_helper::split_by_extension(filename);
	return fmt_lib::format(SPDLOG_FMT_STRING(SPDLOG_FILENAME_T("{}_{:04d}-{:02d}-{:02d}{}")), basename, now_tm.tm_year + 1900,
	now_tm.tm_mon + 1, now_tm.tm_mday, ext);
	}
	};