Choose fields to display with -o flag

cmd/root.go

@@ -14,11 +14,13 @@ const (
 )
 
 var (
-	gJails []Jail
+	gJails			[]Jail
 
-	gUseSudo bool
+	gUseSudo		bool
+
+	gConfigFile		string
+	gDisplayColumns	string
 
-	gConfigFile string
 
 	rootCmd = & cobra.Command{
     	Use:    "gocage",
@@ -73,8 +75,8 @@ func init() {
     rootCmd.PersistentFlags().BoolVarP(&gUseSudo, "sudo", "s", false, "Use sudo to run commands")
 
 // Command dependant switches
-/*    listComputerCmd.PersistentFlags().BoolVarP(&gDisplayAsCSV, "csv-format", "v", false, "Show results in CSV (separator = ';')")
-    searchComputerCmd.PersistentFlags().BoolVarP(&gShowAccount, "show-account", "c", false, "Show account when listing computer")
+    listCmd.PersistentFlags().StringVarP(&gDisplayColumns, "outcol", "o", "JID,Name,Config.Release,Config.Ip4_addr,Running", "Show these columns in output")
+/*    searchComputerCmd.PersistentFlags().BoolVarP(&gShowAccount, "show-account", "c", false, "Show account when listing computer")
     searchComputerCmd.PersistentFlags().BoolVarP(&gDisplayAsCSV, "csv-format", "v", false, "Show results in CSV (separator = ';')")
 */
     
@@ -102,7 +104,14 @@ func initConfig() {
 //	fmt.Println("Using config file:", viper.ConfigFileUsed())
 //	fmt.Printf("datastore in config : %s\n", viper.GetStringSlice("datastore"))
 //	fmt.Printf("datastore.0 in config : %s\n", viper.GetStringSlice("datastore.0"))
-	gUseSudo = viper.GetBool("sudo")
+	
+	// Command line flags have priority on config file
+	if false == rootCmd.Flags().Lookup("sudo").Changed {
+		gUseSudo = viper.GetBool("sudo")
+	}
+	if false == listCmd.Flags().Lookup("outcol").Changed {
+		gDisplayColumns = viper.GetString("outcol")
+	}
 }
 
 func Execute() {