New static configuration loading system.

Co-authored-by: Mathieu Lonjaret <mathieu.lonjaret@gmail.com>

pkg/config/label/label.go

@@ -0,0 +1,33 @@
+// Package label implements the decoding and encoding between flat labels and a typed Configuration.
+package label
+
+import (
+	"github.com/containous/traefik/pkg/config"
+	"github.com/containous/traefik/pkg/config/parser"
+)
+
+// DecodeConfiguration converts the labels to a configuration.
+func DecodeConfiguration(labels map[string]string) (*config.Configuration, error) {
+	conf := &config.Configuration{
+		HTTP: &config.HTTPConfiguration{},
+		TCP:  &config.TCPConfiguration{},
+	}
+
+	err := parser.Decode(labels, conf, "traefik.http", "traefik.tcp")
+	if err != nil {
+		return nil, err
+	}
+
+	return conf, nil
+}
+
+// EncodeConfiguration converts a configuration to labels.
+func EncodeConfiguration(conf *config.Configuration) (map[string]string, error) {
+	return parser.Encode(conf)
+}
+
+// Decode converts the labels to an element.
+// labels -> [ node -> node + metadata (type) ] -> element (node)
+func Decode(labels map[string]string, element interface{}, filters ...string) error {
+	return parser.Decode(labels, element, filters...)
+}