buildr/internal/logging/setup.go

package logging

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

func NewConfig() Config {
	return Config{
		LogLevel: new(slog.LevelVar),
	}
}

type Config struct {
	LogLevel  *slog.LevelVar
	AddSource bool
}

func (c *Config) Flags() *flag.FlagSet {
	flagSet := flag.NewFlagSet("logging", flag.PanicOnError)
	flagSet.TextVar(
		c.LogLevel,
		"log.level",
		c.LogLevel,
		"set log level",
	)
	flagSet.BoolVar(
		&c.AddSource,
		"log.add-source",
		false,
		"Enable to get detailed information where the log was produced",
	)

	return flagSet
}

func (c *Config) Logger() *slog.Logger {
	slogOptions := slog.HandlerOptions{
		AddSource: c.AddSource,
		Level:     c.LogLevel.Level(),
	}

	return slog.New(slog.NewTextHandler(os.Stderr, &slogOptions))
}