this is nowhere near working yet

internal/config/config.go

@@ -0,0 +1,83 @@
+package config
+
+import (
+	"fmt"
+
+	"git.eeqj.de/sneak/gohttpserver/internal/globals"
+	"git.eeqj.de/sneak/gohttpserver/internal/logger"
+	"github.com/rs/zerolog"
+	"github.com/spf13/viper"
+	"go.uber.org/fx"
+
+	// spooky action at a distance!
+	// this populates the environment
+	// from a ./.env file automatically
+	// for development configuration.
+	// .env contents should be things like
+	// `DBURL=postgres://user:pass@.../`
+	// (without the backticks, of course)
+	_ "github.com/joho/godotenv/autoload"
+)
+
+type ConfigParams struct {
+	Globals globals.Globals
+	Logger  logger.Logger
+}
+
+type Config struct {
+	DBURL           string
+	Debug           bool
+	MaintenanceMode bool
+	MetricsPassword string
+	MetricsUsername string
+	Port            int
+	SentryDSN       string
+	params          ConfigParams
+	log             *zerolog.Logger
+}
+
+func New(lc fx.Lifecycle, params ConfigParams) (*Config, error) {
+	log := params.Logger.Get()
+	name := params.Globals.Appname
+
+	viper.SetConfigName(name)
+	viper.SetConfigType("yaml")
+	// path to look for the config file in:
+	viper.AddConfigPath(fmt.Sprintf("/etc/%s", name))
+	// call multiple times to add many search paths:
+	viper.AddConfigPath(fmt.Sprintf("$HOME/.config/%s", name))
+	// viper.SetEnvPrefix(strings.ToUpper(s.appname))
+	viper.AutomaticEnv()
+
+	viper.SetDefault("DEBUG", "false")
+	viper.SetDefault("MAINTENANCE_MODE", "false")
+	viper.SetDefault("PORT", "8080")
+	viper.SetDefault("DBURL", "")
+	viper.SetDefault("SENTRY_DSN", "")
+	viper.SetDefault("METRICS_USERNAME", "")
+	viper.SetDefault("METRICS_PASSWORD", "")
+
+	if err := viper.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
+			// Config file not found; ignore error if desired
+		} else {
+			// Config file was found but another error was produced
+			log.Panic().
+				Err(err).
+				Msg("config file malformed")
+		}
+	}
+
+	s := &Config{
+		DBURL:           viper.GetString("DBURL"),
+		Debug:           viper.GetBool("debug"),
+		Port:            viper.GetInt("PORT"),
+		SentryDSN:       viper.GetString("SENTRY_DSN"),
+		MaintenanceMode: viper.GetBool("MAINTENANCE_MODE"),
+		MetricsUsername: viper.GetString("METRICS_USERNAME"),
+		MetricsPassword: viper.GetString("METRICS_PASSWORD"),
+		log:             log,
+	}
+
+	return s, nil
+}