copy: add layer annotations to TryReusingBlobOptions

Signed-off-by: Giuseppe Scrivano <[email protected]>

copy/single.go

@@ -627,6 +627,7 @@ func (ic *imageCopier) copyLayer(ctx context.Context, srcInfo types.BlobInfo, to
 			EmptyLayer:    emptyLayer,
 			LayerIndex:    &layerIndex,
 			SrcRef:        srcRef,
+			Annotations:   srcInfo.Annotations,
 		})
 		if err != nil {
 			return types.BlobInfo{}, "", fmt.Errorf("trying to reuse blob %s at destination: %w", srcInfo.Digest, err)

internal/private/private.go

@@ -113,9 +113,10 @@ type TryReusingBlobOptions struct {
 	// if they use internal/imagedestination/impl.Compat;
 	// in that case, they will all be consistently zero-valued.
 
-	EmptyLayer bool            // True if the blob is an "empty"/"throwaway" layer, and may not necessarily be physically represented.
-	LayerIndex *int            // If the blob is a layer, a zero-based index of the layer within the image; nil otherwise.
-	SrcRef     reference.Named // A reference to the source image that contains the input blob.
+	EmptyLayer  bool              // True if the blob is an "empty"/"throwaway" layer, and may not necessarily be physically represented.
+	LayerIndex  *int              // If the blob is a layer, a zero-based index of the layer within the image; nil otherwise.
+	SrcRef      reference.Named   // A reference to the source image that contains the input blob.
+	Annotations map[string]string // Annotations specified for the layer.
 }
 
 // ReusedBlob is information about a blob reused in a destination.