bottin-ag/cmd/root.go

// Package cmd provides the cobra command and subcommands for the application
package cmd

import (
	"fmt"
	"log"
	"os"
	"strings"

	"git.agecem.com/agecem/bottin-ag/config"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

var cfgFile string

// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
	Use:   "bottin-ag",
	Short: "Application de registre de présence en Assemblée Générale de l'AGECEM",
}

func Execute() {
	err := rootCmd.Execute()
	if err != nil {
		os.Exit(1)
	}
}

func init() {
	cobra.OnInitialize(initConfig)

	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.bottin-ag.yaml)")

	if err := config.RegisterFlags(rootCmd.PersistentFlags()); err != nil {
		log.Fatal(err)
	}
}

// initConfig reads in config file and ENV variables if set.
func initConfig() {
	if cfgFile != "" {
		// Use config file from the flag.
		viper.SetConfigFile(cfgFile)
	} else {
		// Find home directory.
		home, err := os.UserHomeDir()
		cobra.CheckErr(err)

		// Search config in home directory with name ".bottin-ag" (without extension).
		viper.AddConfigPath(home)
		viper.SetConfigType("yaml")
		viper.SetConfigName(".bottin-ag")
	}

	viper.SetEnvPrefix("BOTTINAG")
	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
	viper.AutomaticEnv() // read in environment variables that match

	// If a config file is found, read it in.
	if err := viper.ReadInConfig(); err == nil {
		fmt.Fprintln(os.Stderr, "Using config file:", viper.ConfigFileUsed())
	}
}