Add manifest creation to new registry data model interface

image/docker/interfaces.py

@@ -34,6 +34,12 @@ class ManifestInterface(object):
     """ Returns the Docker V1 image ID for the leaf (top) layer, if any, or None if none. """
     pass
 
+  @abstractproperty
+  def legacy_image_ids(self):
+    """ Returns the Docker V1 image IDs for the layers of this manifest or None if not applicable.
+    """
+    pass
+
   @abstractproperty
   def blob_digests(self):
     """ Returns an iterator over all the blob digests referenced by this manifest,

image/docker/schema1.py

@@ -254,6 +254,10 @@ class DockerSchema1Manifest(ManifestInterface):
   def image_ids(self):
     return {mdata.v1_metadata.image_id for mdata in self.layers}
 
+  @property
+  def legacy_image_ids(self):
+    return {mdata.v1_metadata.image_id for mdata in self.layers}
+
   @property
   def parent_image_ids(self):
     return {mdata.v1_metadata.parent_image_id for mdata in self.layers

image/docker/schema2/manifest.py

@@ -172,6 +172,10 @@ class DockerSchema2Manifest(ManifestInterface):
   def leaf_layer_v1_image_id(self):
     return list(self.layers_with_v1_ids)[-1].v1_id
 
+  @property
+  def legacy_image_ids(self):
+    return [l.v1_id for l in self.layers_with_v1_ids]
+
   @property
   def blob_digests(self):
     return [str(layer.digest) for layer in self.layers]