Can old files in the Rotating files feature be named by date？

[bboxerxiaofeng]

Currently, old files are suffixed with numbers, such as test.1.log test.2.log...
Now I want to use the current log as the extension for the old file，such as test.2024-08-27.1.log , test.2024-08-27.2.log, What should I do?

[tt4g]

You can rename the log file with file_event_handlers.

https://github.com/gabime/spdlog/blob/a3a0c9d66386962fcaf0178fcae03ac77c1e0257/include/spdlog/common.h#L328C8-L339

Another way: create a custom sink: Wiki: 4. Sinks (implementing your own sink)

[bboxerxiaofeng]

Could you please give an example to illustrate？

[bboxerxiaofeng]

I used the code you provided and it compiled successfully, but the old file names are still suffixed with numbers, such as test.1.log

[tt4g]

If you want to do that, implement custom sink: Wiki: 4. Sinks (implementing your own sink)

[bboxerxiaofeng]

Could you please help me implement it? Thank you.

[bboxerxiaofeng]

I found that the java log library itself supports such a function. For example, the log files they generate are test.log, test-2024-01-23.1.log, test-2024-01-23.2.log, test-2024-01 -24.1.log, 2024-01-24.2.log

[tt4g]

Could you please help me implement it? Thank you.

If you encounter problems implementing a custom sync, you can open an issue and get help.
However, the specification of the behavior of the date and size rotation is unclear.

Note a similar issue was created previously, but the specification of how it would work was unclear: #2702 (comment)

For example, the log files they generate are test.log, test-2024-01-23.1.log, test-2024-01-23.2.log, test-2024-01 -24.1.log, 2024-01-24.2.log

The above example does not show how the logs would be rotated.
For example, are you thinking about the following behavior specification?

• When is test.log rotated?
  • Suppose the 2024-01-23 log is written in test.log. When the date changes to 2024-01-24, will test.log be rotated to test.log.2024-01-23.1.log? Or does test.log remain as is?
    • If it doesn't rotate with the date, what would the file name be if it rotates on 2024-01-24? test-2024-01-23.1.log? Or test-2024-01-24.1.log?

Rotation of dates and sizes is often considered easy. However, the specifications must be carefully considered.