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",
@@ -30,19 +32,24 @@ var cfg = &Config{
 // LoadZones loads all zones and machines in the config directory
 // or file
 func (cfg *Config) LoadZones(resolve bool) (*cluster.Cluster, error) {
-	// try config file first
-	zones, err := cluster.NewFromConfig(cfg.ConfigFile,
-		cluster.ResolvePublicAddresses(resolve),
-		cluster.WithLogger(log),
-	)
+	var zones *cluster.Cluster
+	var err error
+
+	if !forceScan {
+		// try config file first
+		zones, err = cluster.NewFromConfig(cfg.ConfigFile,
+			cluster.ResolvePublicAddresses(resolve),
+			cluster.WithLogger(log),
+		)
 
-	switch {
-	case err == nil:
-		// file was good
-		return zones, nil
-	case !os.IsNotExist(err) || cfg.ConfigFile != DefaultConfigFile:
-		// file was bad
-		return nil, core.Wrap(err, "NewFromConfig(%q)", cfg.ConfigFile)
+		switch {
+		case err == nil:
+			// file was good
+			return zones, nil
+		case !os.IsNotExist(err) || cfg.ConfigFile != DefaultConfigFile:
+			// file was bad
+			return nil, core.Wrap(err, "NewFromConfig(%q)", cfg.ConfigFile)
+		}
 	}
 
 	// default file doesn't exist. scan instead.
@@ -53,7 +60,10 @@ func (cfg *Config) LoadZones(resolve bool) (*cluster.Cluster, error) {
 }
 
 func init() {
-	rootCmd.PersistentFlags().
-		StringVarP(&cfg.ConfigFile, "config-file", "f",
-			DefaultConfigFile, "config file (JSON or YAML)")
+	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")
 }