add trigger kind "time" in rolling_file

[Dirreke]

I add the trigger kind "time" in rolling_file. It can be set with limit like 5second, 10minute, 1day, 3weeks...It may be able to solve the Issue #235. I referred to #139 and thank for @SSebo

[Dirreke]

I modified the trigger logic again. Now, assuming the trigger time is 2 days, a new log file will be generated at 0:00 every other day, even though the first trigger may be less than 2 days. The same applies to others.
it can achieve cover the feature of #295

[Sandvoxel]

With time based trigger you might want to add the pattern for the window to allow the time and date the file was created.

[estk]

@Dirreke mention me here when ready for a new review @bconn98 big shoutout for the assist and driving this forward.

[estk]

I suggest that whether the log get written pre or post roll should be configurable. Lets make the logic dependent on the roller.

[Dirreke]

Doc wasn't competed yet.

[Dirreke]

I added a config item in roller called is_pre_process(I haven't figured out the name yet) to detemine if the file should roll pre or post getting written. What do you think about these codes?

[Dirreke]

@estk @bconn98

[Dirreke]

The changes are as follows

• Change limit to interval`.
• Add modulate and max_random_delay parameters and implement them.
• change the trigger logic to be same witj log4j.

I don't use the humantime because it sets year to 365.25 days and sets month to 30.43 days and I don't like it. I set they both to the actual number of days but not average.

[Dirreke]

There are two differences between log4rs and log4j.

• In log4j, the first day of the week is Sunday. But in log4rs, the first day of the week will be Monday , which is the same as chrono crate and the ISO 8601 standard.
• The unit used by log4rs is the pattern string in the file name. But in log4rs, I have to keep using the unit of the interval because we don't have a date/time pattern yet.

Any thoughts?

[bconn98]

I'm good with both of those trade offs

[bconn98]

I'll re-review tomorrow

[bconn98]

@Dirreke, hey the MSRV needs to get bumped to support the toml crate. Here is a commit making the same change.

[Dirreke]

We can close #289 #235 #309 now.