Standard Compatible

logger is built directly on top of Go’s standard log/slog package.

After initialization, the logger automatically registers itself as the global slog logger, allowing the application to continue using the standard logging API without introducing a custom logging interface.

This keeps the package fully compatible with existing Go logging patterns while extending slog with structured file logging, terminal output, file rotation, and additional helper functionality.

package main

import (
	"log/slog"

	"github.com/netlifeguru/logger"
)

func main() {
	closer, err := logger.Init(logger.Config{
		Dir:             "./logs",
		TerminalOutput:  true,
		DisableColors:   false,
		MinLevel:        slog.LevelInfo,
		ConsoleMinLevel: slog.LevelDebug,
		MaxFileSize:     10 * 1024 * 1024,
		MaxLogFiles:     5,
		AddSource:       true,
	})

	if err != nil {
		slog.Error(err.Error())
	}

	defer closer.Close()

	slog.Info("logger initialized")
}

Once initialized, all standard logging methods such as slog.Info, slog.Warn, and slog.Error automatically use the configured logger instance.

The example above enables:

• structured JSON file logging
• colorized terminal output
• source location tracking
• automatic log rotation
• automatic cleanup of old log files

while remaining fully compatible with the standard Go logging ecosystem.