leech/config/config.go

package config

import (
	"encoding/json"
	"log"
	"os"
	"path/filepath"
)

type ConfigS struct {
	Host      string            `json:"host"`
	ServeDirs map[string]string `json:"servedirs"`
}

var Config ConfigS

func Init() {
	chosenConfigPath := "/etc/leech/"

	// Deal with a JSON configuration file in that folder.
	configFile := filepath.Join(chosenConfigPath, "config.json")

	// Does the file not exist?
	if _, err := os.Stat(configFile); os.IsNotExist(err) {
		log.Fatal("config file couldn't be found")
	} else {
		// Load the existing file.
		fh, err := os.Open(configFile)
		if err != nil {
			panic(err)
		}
		defer fh.Close()

		decoder := json.NewDecoder(fh)
		err = decoder.Decode(&Config)
		if err != nil {
			panic(err)
		}
	}
}