Add delete target to image remove

Adds atomicity to image delete when deleting from a list.

Signed-off-by: Derek McGowan <derek@mcg.dev>

images/image.go

@@ -58,6 +58,7 @@ type Image struct {
 // DeleteOptions provide options on image delete
 type DeleteOptions struct {
 	Synchronous bool
+	Target      *ocispec.Descriptor
 }
 
 // DeleteOpt allows configuring a delete operation
@@ -72,6 +73,16 @@ func SynchronousDelete() DeleteOpt {
 	}
 }
 
+// DeleteTarget is used to specify the target value an image is expected
+// to have when deleting. If the image has a different target, then
+// NotFound is returned.
+func DeleteTarget(target *ocispec.Descriptor) DeleteOpt {
+	return func(ctx context.Context, o *DeleteOptions) error {
+		o.Target = target
+		return nil
+	}
+}
+
 // Store and interact with images
 type Store interface {
 	Get(ctx context.Context, name string) (Image, error)