layer1: add builder namespace subscriber step 20

pkg/buildermgr/namespace_subscriber.go

@@ -0,0 +1,44 @@
+package buildermgr
+package buildermgr
+
+import (
+	"context"
+
+	"github.com/fission/fission/pkg/utils"
+	"github.com/fission/fission/pkg/utils/manager"
+)
+
+type builderEnvNamespaceAdder interface {
+	AddNamespace(ctx context.Context, ns string, mgr manager.Interface)
+}
+
+type builderPkgNamespaceAdder interface {
+	AddNamespace(ctx context.Context, ns string, mgr manager.Interface)
+}
+
+func NewNamespaceSubscriber(envw builderEnvNamespaceAdder, pkgw builderPkgNamespaceAdder, mgr manager.Interface) utils.NamespaceSubscriber {
+	return utils.NamespaceSubscriberFuncs{
+		SubscriberName: "buildermgr",
+		AddFunc: func(ctx context.Context, record utils.NamespaceRecord) error {
+			registerBuilderNamespace(ctx, record.Name, envw, pkgw, mgr)
+			return nil
+		},
+		ResyncFunc: func(ctx context.Context, record utils.NamespaceRecord) error {
+			registerBuilderNamespace(ctx, record.Name, envw, pkgw, mgr)
+			return nil
+		},
+	}
+}
+
+func registerBuilderNamespace(ctx context.Context, namespace string, envw builderEnvNamespaceAdder, pkgw builderPkgNamespaceAdder, mgr manager.Interface) {
+	if namespace == "" {
+		return
+	}
+	utils.DefaultNSResolver().AddNamespace(namespace)
+	if envw != nil {
+		envw.AddNamespace(ctx, namespace, mgr)
+	}
+	if pkgw != nil {
+		pkgw.AddNamespace(ctx, namespace, mgr)
+	}
+}