add ID to repo snapshot

Signed-off-by: Yonghui Li <lyonghui@vmware.com>

pkg/repository/udmrepo/kopialib/lib_repo.go

@@ -712,6 +712,7 @@ func (kr *kopiaRepository) GetSnapshot(ctx context.Context, id udmrepo.ID) (udmr
 	}
 
 	return udmrepo.Snapshot{
+		ID:          udmrepo.ID(snap.ID),
 		Source:      snap.Source.Path,
 		Description: snap.Description,
 		StartTime:   snap.StartTime.ToTime(),
@@ -751,6 +752,7 @@ func (kr *kopiaRepository) ListSnapshot(ctx context.Context, source string) ([]u
 	snapshots := []udmrepo.Snapshot{}
 	for _, snap := range mani {
 		snapshots = append(snapshots, udmrepo.Snapshot{
+			ID:          udmrepo.ID(snap.ID),
 			Source:      snap.Source.Path,
 			Description: snap.Description,
 			StartTime:   snap.StartTime.ToTime(),

pkg/repository/udmrepo/kopialib/lib_repo_test.go

@@ -1609,6 +1609,7 @@ func TestGetSnapshot(t *testing.T) {
 			snapshotID:  udmrepo.ID("fake-id"),
 			setRepoMock: true,
 			expectedSnap: udmrepo.Snapshot{
+				ID:          "fake-id",
 				Source:      "fake-source",
 				Description: "fake-desc",
 				StartTime:   mockMani.StartTime.ToTime(),
@@ -1805,6 +1806,7 @@ func TestListSnapshot(t *testing.T) {
 			setRepoMock: true,
 			expectedSnaps: []udmrepo.Snapshot{
 				{
+					ID:          "fake-id",
 					Source:      "fake-source",
 					Description: "fake-desc",
 					StartTime:   mockMani.StartTime.ToTime(),

pkg/repository/udmrepo/repo.go

@@ -98,6 +98,7 @@ type Metadata struct {
 }
 
 type Snapshot struct {
+	ID          ID
 	Source      string
 	Description string
 	StartTime   time.Time