Recursive handling for command line flags

Every struct in a NodeConf with `lopt:"foo" set is now added as a
command-line flag with the RecursiveCreateFlags call. For maps a struct
with the key UNDEF is added so that it can be parsed out.

As the flags for the command-line need variables which hold the values,
for every map an element map[UNDEF] is added.  When now calling the
internal add, these map element can be filtered out and replace by the
given name. (e.g., --netname)

* rewrote node/profile add for recursive functions
* rewrote node/profile set for recursive functions
* rewrote node/profile list for recursive functions

Signed-off-by: Christian Goll <cgoll@suse.com>

internal/pkg/node/methods.go

@@ -399,12 +399,15 @@ func GetByName(node interface{}, name string) (string, error) {
 /*
 Check if the Netdev is empty, so has no values set
 */
-func (dev *NetDevs) Empty() bool {
-	if dev == nil {
+func ObjectIsEmpty(obj interface{}) bool {
+	if obj == nil {
 		return true
 	}
-	varType := reflect.TypeOf(*dev)
-	varVal := reflect.ValueOf(*dev)
+	varType := reflect.TypeOf(obj)
+	varVal := reflect.ValueOf(obj)
+	if varType.Kind() == reflect.Ptr && !varVal.IsNil() {
+		return ObjectIsEmpty(varVal.Elem().Interface())
+	}
 	if varVal.IsZero() {
 		return true
 	}
@@ -418,6 +421,10 @@ func (dev *NetDevs) Empty() bool {
 			if len(varVal.Field(i).Interface().(map[string]string)) != 0 {
 				return false
 			}
+		} else if varType.Field(i).Type.Kind() == reflect.Ptr {
+			if !ObjectIsEmpty(varVal.Field(i).Interface()) {
+				return false
+			}
 		}
 	}
 	return true