Check for lack of config file

cmd/root.go

@@ -5,7 +5,7 @@ Copyright © 2024 raul
 package cmd
 
 import (
-	"fmt"
+	"log"
 	"os"
 
 	"github.com/spf13/cobra"
@@ -14,7 +14,6 @@ import (
 
 var cfgFile string
 
-// rootCmd represents the base command when called without any subcommands
 var rootCmd = &cobra.Command{
 	Use:   "cert400",
 	Short: "A brief description of your application",
@@ -29,8 +28,6 @@ to quickly create a Cobra application.`,
 	// Run: func(cmd *cobra.Command, args []string) { },
 }
 
-// Execute adds all child commands to the root command and sets flags appropriately.
-// This is called by main.main(). It only needs to happen once to the rootCmd.
 func Execute() {
 	err := rootCmd.Execute()
 	if err != nil {
@@ -40,18 +37,9 @@ func Execute() {
 
 func init() {
 	cobra.OnInitialize(initConfig)
-
-	// Here you will define your flags and configuration settings.
-	// Cobra supports persistent flags, which, if defined here,
-	// will be global for your application.
-
 	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "Config file (default is $HOME/.config/cert400/cert400.toml)")
-
-	// Cobra also supports local flags, which will only run
-	// when this action is called directly.
 }
 
-// initConfig reads in config file and ENV variables if set.
 func initConfig() {
 	if cfgFile != "" {
 		// Use config file from the flag.
@@ -61,16 +49,18 @@ func initConfig() {
 		home, err := os.UserHomeDir()
 		cobra.CheckErr(err)
 
-		// Search config in home directory with name ".cert400" (without extension).
-		viper.AddConfigPath(home + "/.config/cert400")
-		viper.SetConfigName("cert400")
-		viper.SetConfigType("toml")
+		viper.AddConfigPath(home + "/.config/cert400/")
+		viper.SetConfigFile(home + "/.config/cert400/cert400.toml")
 	}
 
 	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())
+	if err := viper.ReadInConfig(); err != nil {
+		if os.IsNotExist(err) {
+			log.Fatalln("Missing config file at $HOME/.config/cert400/cert400.toml")
+		} else {
+			log.Fatal(err)
+		}
 	}
 }