ldapmin/config.go

package main

import (
	"encoding/json"
	"errors"
	"fmt"
	"os"

	"github.com/spf13/pflag"
)

type config struct {
	ListenAddr string     `json:"listenAddr"`
	Ldap       ldapConfig `json:"ldap"`
}

type ldapConfig struct {
	URL        string `json:"url"`
	StartTLS   bool   `json:"starttls"`
	UserFormat string `json:"userformat"`
}

func parseConfig() (config, error) {
	configFile := "config.json"

	pflag.StringVarP(&configFile, "config", "c", configFile, "Path to configuration file.")
	pflag.Parse()

	var c config
	file, err := os.Open(configFile)
	if err != nil {
		return c, fmt.Errorf("can not open configuration file: %s", err)
	}

	if err := json.NewDecoder(file).Decode(&c); err != nil {
		return c, fmt.Errorf("can not parse configuration: %s", err)
	}

	if c.ListenAddr == "" {
		c.ListenAddr = ":8080"
	}

	if c.Ldap.URL == "" {
		return c, errors.New("ldap.url can not be empty")
	}

	if c.Ldap.UserFormat == "" {
		return c, errors.New("ldap.userformat can not be empty")
	}

	return c, nil
}