Update dataset_dict push_to_hub (#7711)

* update dataset_dict push_to_hub

* minor

* fix test

Author: lhoestq

src/datasets/arrow_dataset.py

@@ -5797,7 +5797,7 @@ def push_to_hub(
             num_proc=num_proc,
         )
 
-        def get_deletions_and_dataset_card() -> tuple[str, str, Optional[str]]:
+        def get_deletions_and_dataset_card() -> tuple[str, list[CommitOperationDelete], str, Optional[str]]:
             parent_commit = api.repo_info(repo_id, repo_type="dataset", revision=revision).sha
 
             # Check if the repo already has a README.md and/or a dataset_infos.json to update them with the new split info (size and pattern)
@@ -5977,7 +5977,9 @@ def get_deletions_and_dataset_card() -> tuple[str, str, Optional[str]]:
                     + (f" (still {num_commits - i - 1} to go)" if num_commits - i - 1 else "")
                     + "."
                 )
-            additions = []
+            last_commit_additions = []
+        else:
+            last_commit_additions = additions
 
         for retry, sleep_time in enumerate(itertools.chain(range(10), itertools.repeat(30)), start=1):
             # We need to retry if there was a commit in between in case it touched the dataset card data
@@ -5997,7 +5999,7 @@ def get_deletions_and_dataset_card() -> tuple[str, str, Optional[str]]:
             try:
                 commit_info = api.create_commit(
                     repo_id,
-                    operations=additions + dataset_card_additions + deletions,
+                    operations=last_commit_additions + dataset_card_additions + deletions,
                     commit_message=commit_message,
                     commit_description=commit_description,
                     repo_type="dataset",