Provide a null implementation for Harbor adapter

This commit provides a null implementation for Harbor adapter to fill data for the listing adapter API

Signed-off-by: Wenkai Yin <yinw@vmware.com>

.gitignore

@@ -1,4 +1,3 @@
-harbor
 !/contrib/helm/harbor
 
 make/docker-compose.yml

src/replication/ng/adapter/harbor/adapter.go

@@ -0,0 +1,59 @@
+// Copyright Project Harbor Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package harbor
+
+import (
+	"github.com/goharbor/harbor/src/common/utils/log"
+	adp "github.com/goharbor/harbor/src/replication/ng/adapter"
+	"github.com/goharbor/harbor/src/replication/ng/model"
+)
+
+const (
+	harbor model.RegistryType = "Harbor"
+)
+
+func init() {
+	// TODO add more information to the info
+	info := &adp.Info{
+		Type:                   harbor,
+		SupportedResourceTypes: []model.ResourceType{model.ResourceTypeRepository},
+	}
+	if err := adp.RegisterFactory(info, func(registry *model.Registry) (adp.Adapter, error) {
+		return newAdapter(registry), nil
+	}); err != nil {
+		log.Errorf("failed to register factory for %s: %v", harbor, err)
+		return
+	}
+	log.Infof("the factory for adapter %s registered", harbor)
+}
+
+// TODO implement the functions
+type adapter struct {
+	*adp.DefaultImageRegistry
+}
+
+func newAdapter(registry *model.Registry) *adapter {
+	return &adapter{}
+}
+
+func (a *adapter) ListNamespaces(*model.NamespaceQuery) ([]*model.Namespace, error) {
+	return nil, nil
+}
+func (a *adapter) CreateNamespace(*model.Namespace) error {
+	return nil
+}
+func (a *adapter) GetNamespace(string) (*model.Namespace, error) {
+	return nil, nil
+}

src/replication/ng/adapter/image_registry.go

@@ -31,3 +31,43 @@ type ImageRegistry interface {
 	PullBlob(repository, digest string) (size int64, blob io.ReadCloser, err error)
 	PushBlob(repository, digest string, size int64, blob io.Reader) error
 }
+
+// TODO implement the functions
+
+// DefaultImageRegistry provides a default implementation for interface ImageRegistry
+type DefaultImageRegistry struct{}
+
+// FetchImages ...
+func (d *DefaultImageRegistry) FetchImages(namespaces []string, filters []*model.Filter) ([]*model.Resource, error) {
+	return nil, nil
+}
+
+// ManifestExist ...
+func (d *DefaultImageRegistry) ManifestExist(repository, reference string) (exist bool, digest string, err error) {
+	return false, "", nil
+}
+
+// PullManifest ...
+func (d *DefaultImageRegistry) PullManifest(repository, reference string, accepttedMediaTypes []string) (manifest distribution.Manifest, digest string, err error) {
+	return nil, "", nil
+}
+
+// PushManifest ...
+func (d *DefaultImageRegistry) PushManifest(repository, reference, mediaType string, payload []byte) error {
+	return nil
+}
+
+// BlobExist ...
+func (d *DefaultImageRegistry) BlobExist(repository, digest string) (exist bool, err error) {
+	return false, nil
+}
+
+// PullBlob ...
+func (d *DefaultImageRegistry) PullBlob(repository, digest string) (size int64, blob io.ReadCloser, err error) {
+	return 0, nil, nil
+}
+
+// PushBlob ...
+func (d *DefaultImageRegistry) PushBlob(repository, digest string, size int64, blob io.Reader) error {
+	return nil
+}

src/replication/ng/replication.go

@@ -25,6 +25,8 @@ import (
 
 	"github.com/goharbor/harbor/src/replication/ng/scheduler"
 
+	// register the Harbor adapter
+	_ "github.com/goharbor/harbor/src/replication/ng/adapter/harbor"
 	"github.com/goharbor/harbor/src/replication/ng/flow"
 	"github.com/goharbor/harbor/src/replication/ng/operation"
 	"github.com/goharbor/harbor/src/replication/ng/registry"