Nicely format Docker logs

nice-logs.nu

#!/usr/bin/env nu

# Tail the last 50 lines of docker-compose logs and follow
cat log.txt | lines
    | each { sed 's/^[^|]*| //' }
    | where { |line| $line =~ "^\{" }
    | each { from json }
    | each { |record|
        let t = $record.t."$date"
        let s = $record.s
        let c = $record.c
        let id = $record.id
        let ctx = $record.ctx
        let msg = $record.msg
        let attr = if ("attr" in $record) {
            echo $record.attr | to json | lines
            | each { |line| echo $"    ($line)" } | to text
        } else { "N/A" }

        let severity = match $s {
            "F" => "\e[1;31mFATAL",
            "E" => "\e[1;31mERROR",
            "W" => "\e[1;33mWARNING",
            "I" => "\e[1;34mINFO"
            _ => $"\e[1;38;2;255;255;255;48;2;30;30;40m ($s)"
        }

        echo $"
\e[90m[($c)]\e[0m ($severity): \e[4m($msg)\e[0m
    \e[1;32mattr:\e[0m ($attr)"
    } | to text