LoggerGo

A lightweight, customizable logging library for Go, designed to provide flexible and simple logging capabilities.

Features

• Simple API for various log levels (Info, Debug, Error).
• Customizable log formats and outputs.
• Lightweight and easy to integrate.
• Supports OTEL (OpenTelemetry) by injecting spanID & traceID into logs.
• By default registers as slog.Default() but this can be change via option

Installation

To install LoggerGo, run:

go get github.com/wasilak/loggergo

Usage

Here's a basic example of how to use LoggerGo:

package main

import (
  "context"
  "flag"
  "log/slog"
  "os"

  "github.com/wasilak/loggergo"
)

func main() {
  ctx := context.Background()
  logLevel := flag.String("log-level", os.Getenv("LOG_LEVEL"), "log level (debug, info, warn, error, fatal)")
  logFormat := flag.String("log-format", os.Getenv("LOG_FORMAT"), "log format (json, plain, otel)")
  devMode := flag.Bool("dev-mode", false, "Development mode")
  otelEnabled := flag.Bool("otel-enabled", false, "OpenTelemetry traces enabled")
  flag.Parse()

  loggerConfig := loggergo.Config{
  Level:        loggergo.LogLevelFromString(*logLevel),
  Format:       loggergo.LogFormatFromString(*logFormat),
  OutputStream: os.Stdout,
  DevMode:      *devMode,
  Output:       loggergo.OutputConsole,
  }

  if *otelEnabled {

  loggerConfig.OtelServiceName = os.Getenv("OTEL_SERVICE_NAME")
  loggerConfig.Output = loggergo.OutputFanout
  loggerConfig.OtelLoggerName = "github.com/wasilak/loggergo" // your package name goes here
  loggerConfig.OtelTracingEnabled = false
  }

  // this registers loggergo as slog.Default()
  _, err := loggergo.LoggerInit(ctx, loggerConfig)
  if err != nil {
  slog.ErrorContext(ctx, err.Error())
  os.Exit(1)
  }

  slog.InfoContext(ctx, "Hello, World!")
}

Contributing

Contributions are welcome! Please fork the repository, make changes, and submit a pull request.

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Feel free to adjust the example to better match the specific functionality of your library.