repository: replace HasBlob with LookupBlobSize

cmd/restic/cmd_cat.go

@@ -167,8 +167,7 @@ func runCat(ctx context.Context, gopts GlobalOptions, args []string) error {
 		}
 
 		for _, t := range []restic.BlobType{restic.DataBlob, restic.TreeBlob} {
-			bh := restic.BlobHandle{ID: id, Type: t}
-			if !repo.HasBlob(bh) {
+			if _, ok := repo.LookupBlobSize(id, t); !ok {
 				continue
 			}
 

cmd/restic/cmd_copy.go

@@ -202,7 +202,7 @@ func copyTree(ctx context.Context, srcRepo restic.Repository, dstRepo restic.Rep
 
 			// Do we already have this tree blob?
 			treeHandle := restic.BlobHandle{ID: tree.ID, Type: restic.TreeBlob}
-			if !dstRepo.HasBlob(treeHandle) {
+			if _, ok := dstRepo.LookupBlobSize(treeHandle.ID, treeHandle.Type); !ok {
 				// copy raw tree bytes to avoid problems if the serialization changes
 				enqueue(treeHandle)
 			}
@@ -212,7 +212,7 @@ func copyTree(ctx context.Context, srcRepo restic.Repository, dstRepo restic.Rep
 				// Copy the blobs for this file.
 				for _, blobID := range entry.Content {
 					h := restic.BlobHandle{Type: restic.DataBlob, ID: blobID}
-					if !dstRepo.HasBlob(h) {
+					if _, ok := dstRepo.LookupBlobSize(h.ID, h.Type); !ok {
 						enqueue(h)
 					}
 				}