Add interface function for deleting tags pointing to a manifest

data/registry_model/registry_pre_oci_model.py

@@ -241,6 +241,21 @@ class PreOCIModel(RegistryDataInterface):
     deleted_tag = model.tag.delete_tag(repo.namespace_user.username, repo.name, tag_name)
     return Tag.for_repository_tag(deleted_tag)
 
+  def delete_tags_for_manifest(self, manifest):
+    """
+    Deletes all tags pointing to the given manifest, making the manifest inaccessible for pulling.
+    Returns the tags deleted, if any. Returns None on error.
+    """
+    try:
+      tagmanifest = database.TagManifest.get(id=manifest._db_id)
+    except database.TagManifest.DoesNotExist:
+      return None
+
+    namespace_name = tagmanifest.tag.repository.namespace_user.username
+    repo_name = tagmanifest.tag.repository.name
+    tags = model.tag.delete_manifest_by_digest(namespace_name, repo_name, manifest.digest)
+    return [Tag.for_repository_tag(tag) for tag in tags]
+
   def change_repository_tag_expiration(self, tag, expiration_date):
     """ Sets the expiration date of the tag under the matching repository to that given. If the
         expiration date is None, then the tag will not expire. Returns a tuple of the previous