pull: mark commits from local cache as partial

If one of the localcache repos has the exact same commit we resolved
from the remote, then we need to make sure to mark it as partial so that
we download the full tree.

Closes: #1074

Closes: #1076
Approved by: cgwalters

src/libostree/ostree-repo-pull.c

@@ -1790,6 +1790,7 @@ scan_one_metadata_object_c (OtPullData                 *pull_data,
         {
           if (objtype == OSTREE_OBJECT_TYPE_COMMIT)
             {
+              /* mark as partial to ensure we scan the commit below */
               if (!write_commitpartial_for (pull_data, tmp_checksum, error))
                 return FALSE;
             }
@@ -1819,6 +1820,12 @@ scan_one_metadata_object_c (OtPullData                 *pull_data,
             return FALSE;
           if (!localcache_repo_has_obj)
             continue;
+          if (objtype == OSTREE_OBJECT_TYPE_COMMIT)
+            {
+              /* mark as partial to ensure we scan the commit below */
+              if (!write_commitpartial_for (pull_data, tmp_checksum, error))
+                return FALSE;
+            }
           if (!ostree_repo_import_object_from_with_trust (pull_data->repo, refd_repo,
                                                           objtype, tmp_checksum,
                                                           !pull_data->is_untrusted,