nushell/crates/nu-std/tests/logger_tests/commons.nu

export def now [] {
    date now | date format "%Y-%m-%dT%H:%M:%S%.3f"
}

export def format-message [
    message: string,
    format: string
    prefix: string,
    ansi
] {
    [   
        ["%MSG%" $message]
        ["%DATE%" (now)]
        ["%LEVEL%" $prefix]
        ["%ANSI_START%" $ansi]
        ["%ANSI_STOP%" (ansi reset)]
    ] | reduce --fold $format {
        |it, acc| $acc | str replace --all $it.0 $it.1
    }
}