17 Logging
| (require koyo/logging) | package: koyo-lib |
This module provides utilities for displaying log messages.
procedure
(start-logger #:levels levels [ #:color? color? #:parent parent #:output-port out]) → (-> void?) levels : (listof (cons/c symbol? log-level/c)) color? : boolean? = #t parent : logger? = (current-logger) out : port? = (current-error-port)
Starts a background thread that receives logs based on
levels and writes them to out in the following
format:
[<timestamp>] [<pid>] [<level>] <topic>: <message>
The levels argument is a list of topic and level pairs. The debug, info, warning and error <level>s are colored using ANSI escape sequences unless #:color? is #f.
The return value is a function that will stop the background thread when called. Calling the stopper function after the thread has been stopped has no effect.