jpictl: add `-S` flag to ignore the config file and always scan

Signed-off-by: Alejandro Mery <amery@jpi.io>

cmd/jpictl/config.go

@@ -22,6 +22,8 @@ type Config struct {
 	ConfigFile string
 }
 
+var forceScan bool
+
 var cfg = &Config{
 	Base:   "m",
 	Domain: "jpi.cloud",
@@ -30,8 +32,12 @@ var cfg = &Config{
 // LoadZones loads all zones and machines in the config directory
 // or file
 func (cfg *Config) LoadZones(resolve bool) (*cluster.Cluster, error) {
+	var zones *cluster.Cluster
+	var err error
+
+	if !forceScan {
 		// try config file first
-	zones, err := cluster.NewFromConfig(cfg.ConfigFile,
+		zones, err = cluster.NewFromConfig(cfg.ConfigFile,
 			cluster.ResolvePublicAddresses(resolve),
 			cluster.WithLogger(log),
 		)
@@ -44,6 +50,7 @@ func (cfg *Config) LoadZones(resolve bool) (*cluster.Cluster, error) {
 			// file was bad
 			return nil, core.Wrap(err, "NewFromConfig(%q)", cfg.ConfigFile)
 		}
+	}
 
 	// default file doesn't exist. scan instead.
 	return cluster.NewFromDirectory(cfg.Base, cfg.Domain,
@@ -53,7 +60,10 @@ func (cfg *Config) LoadZones(resolve bool) (*cluster.Cluster, error) {
 }
 
 func init() {
-	rootCmd.PersistentFlags().
-		StringVarP(&cfg.ConfigFile, "config-file", "f",
+	flags := rootCmd.PersistentFlags()
+
+	flags.StringVarP(&cfg.ConfigFile, "config-file", "f",
 		DefaultConfigFile, "config file (JSON or YAML)")
+	flags.BoolVarP(&forceScan, "force-scan", "S",
+		false, "ignore config file and scan the directory instead")
 }