custom-slog-logger

Custom logger based on slog used to display nice colored messages on any io.Writer including source lines of error. In addition, the logger can be configured to send JSON formatted log to a third-party http server (e.g. a logging microservice)

As a slog.Logger using a custom slog.Handler, it can be used to generate new logger, with additinonal attributes that will be print each time a slog.Record has to be handled (e.g. an user id in the context of a http server), or with a group name (i.e. prefix for the attributes), or both of them.

This logger is customisable with the use of CustomHandlerOptions.

Installation

A simple go get github.com/darthyoh/custom-slog-logger should install the package in your module.

Basic usage

Generate a simple CustomLogger with NewCustomLogger() utility and start logging :

package main

import customlogger "github.com/darthyoh/curstom-slog-logger"

func main() {

	//create a new logger with default (nil) *CustomHandlerOptions
	//will print colored log on os.Stderr, with source code and a default Info level
	//no json url server provided
	logger := customlogger.NewCustomLogger(os.Stderr, nil)

	//simple Info log
	logger.Info("using custom logger", "an attr", "a value")

	//simple Error log
	logger.Error("fatal error", "error_message","the error message")

	//simple Debug log
	logger.Debug("test debug") //won't be printed : Debug Level in not enough for this logger !
	
	//simply log to os.Stderr
	logger.InfoTextOnly("Info log")

	//simply send to server
	logger.InfoJsonOnly("Info log") //won't be printed but WON'T BE SENT, cause no jsonurl was provided
}