muddy/cmd/server/main.go

package main

import (
	"context"
	"flag"
	"io"
	"log/slog"
	"os"
	"os/signal"
	"syscall"
	"time"

	"code.ndumas.com/ndumas/muddy/core"
)

func main() {
	var (
		level   string
		logFile string
	)

	flag.StringVar(&level, "level", "INFO", "Log level: INFO/info, DEBUG/debug, or ERROR/error.")
	flag.StringVar(&logFile, "log", "out.log", "Path to log file.")

	flag.Parse()

	f, err := os.Create(logFile)
	if err != nil {
		slog.With(
			slog.Any("error", err),
		).Error("could not open log file")
		os.Exit(1)
	}

	appConfig := core.AppConfig{
		Port: ":3001",

		LogDest:  io.MultiWriter(f, os.Stderr),
		LogLevel: level,

		TickInterval: time.Millisecond * 30,
	}

	app := core.New(appConfig)

	ctx, cancel := context.WithCancel(context.Background())

	c := make(chan os.Signal, 1)
	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
	go func() {
		<-c
		app.L.Info("shutting down")
		cancel()
	}()

	app.Run(ctx)
}