Append & rotate on short running program...

[gskapka]

I have the logger setup:

Logger::try_with_str("info")
    .and_then(|logger| {
        logger
            .log_to_file(FileSpec::default().directory("./logs"))
            .rotate(
                Criterion::Age(Age::Second),
                Naming::Timestamps,
                Cleanup::KeepLogAndCompressedFiles(2, 2),
            )
            .append()
            .start()
    })
    .and_then(|_| ...)

...in a binary which is not long running, and instead is called multiple times via CLI commands.

The .append works fine, a log file is created in the expected dir, and all program logs are appended therein.

However the rotation doesn't appear to take effect whatsoever.

What am I doing wrong?

[emabee]

You're doing fine :-)

The issue is real, and described in the docs, at Criterion::Age.
On unix (and Mac), the filesystems maintains only a LAST_MODIFIED_AT, not a CREATED_AT property of files. On Windows, there is a CREATED_AT property, but Windows does a weird trick to make it unusable for our case. So flexi_logger "invents" the value for CREATED_AT for the first file (it uses the current timestamp).

With many short program runs, using Criterion::Size for rotation might be a better way out, or disabling append.

[gskapka]

Ah damn! Very sorry to have troubled you in that case - I should have spotted that in the docs.

As it happens I was just playing further and had discovered that it works perfectly as expected if I use size as a criterion - exactly like you said, so I'll switch to that method.

Thank you for the prompt reply though, and for the excellent crate.

Closing as solved.

[emabee]

I added an improvement to the logic you were using, which should help significantly for your case.