initial import for Open Source 🎉

data/model/oci/blob.py

@@ -0,0 +1,26 @@
+from data.database import ImageStorage, ManifestBlob
+from data.model import BlobDoesNotExist
+from data.model.storage import get_storage_by_uuid, InvalidImageException
+from data.model.blob import get_repository_blob_by_digest as legacy_get
+
+def get_repository_blob_by_digest(repository, blob_digest):
+  """ Find the content-addressable blob linked to the specified repository and
+      returns it or None if none.
+  """
+  try:
+    storage = (ImageStorage
+               .select(ImageStorage.uuid)
+               .join(ManifestBlob)
+               .where(ManifestBlob.repository == repository,
+                      ImageStorage.content_checksum == blob_digest,
+                      ImageStorage.uploading == False)
+               .get())
+
+    return get_storage_by_uuid(storage.uuid)
+  except (ImageStorage.DoesNotExist, InvalidImageException):
+    # TODO: Remove once we are no longer using the legacy tables.
+    # Try the legacy call.
+    try:
+      return legacy_get(repository, blob_digest)
+    except BlobDoesNotExist:
+      return None