flexi_logger 0.31.8

An easy-to-configure and flexible logger that writes logs to stderr or stdout and/or to files. It allows custom logline formats, and it allows changing the log specification at runtime. It also allows defining additional log streams, e.g. for alert or security messages.
Documentation 
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/// The age after which a log file rotation will be triggered,
/// when [`Criterion::Age`](crate::Criterion::Age) is chosen.
#[derive(Copy, Clone, Debug)]
pub enum Age {
    /// Rotate the log file when the local clock has started a new day since the
    /// current file had been created.
    Day,
    /// Rotate the log file when the local clock has started a new hour since the
    /// current file had been created.
    Hour,
    /// Rotate the log file when the local clock has started a new minute since the
    /// current file had been created.
    Minute,
    /// Rotate the log file when the local clock has started a new second since the
    /// current file had been created.
    Second,
}