root.go

package main

import (
	"fmt"
	"os"

	"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:   "changelogmanager",
	Short: "Small app to manage change log entries and combine them into CHANGELOG.md",
	Long: `Allows users to generate change log entry .json files /changelogs/unreleased/.
	
	Then can combine all the .json files in /changelogs/unreleased/ 
	into CHANGELOG.md and a stand alone file`,
}

// Execute adds all child commands to the root command sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
	if err := RootCmd.Execute(); err != nil {
		fmt.Println(err)
		os.Exit(-1)
	}
}

func init() {
	cobra.OnInitialize(initConfig)
}

// initConfig reads in config file and ENV variables if set.
func initConfig() {
	if cfgFile != "" { // enable ability to specify config file via flag
		viper.SetConfigFile(cfgFile)
	}

	viper.SetConfigName(".changelogmanager") // name of config file (without extension)
	viper.AddConfigPath("$HOME")             // adding home directory as first search path
	viper.AutomaticEnv()                     // read in environment variables that match

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