Handle config options

internal/config/cli.go

@@ -0,0 +1,24 @@
+package config
+
+import (
+	"flag"
+)
+
+// declareFlags registers flags for the structure Options.
+func declareFlags(o *Config) {
+	flag.StringVar(&o.Bind, "bind", ":8081", "Bind port/socket")
+}
+
+// parseCLI parse the flags and treats extra args as configuration filename.
+func parseCLI(o *Config) error {
+	flag.Parse()
+
+	for _, conf := range flag.Args() {
+		err := parseFile(o, conf)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}