From d35ed3fd8346d47195a6b3e6eb41ab0d6a8c2e02 Mon Sep 17 00:00:00 2001
From: Pepijn <pepijn@huggingface.co>
Date: Mon, 1 Sep 2025 11:01:27 +0200
Subject: [PATCH] conversion dest

---
 .../v21/convert_dataset_v20_to_v21.py         | 63 +++++++++++++------
 1 file changed, 43 insertions(+), 20 deletions(-)

diff --git a/src/lerobot/datasets/v21/convert_dataset_v20_to_v21.py b/src/lerobot/datasets/v21/convert_dataset_v20_to_v21.py
index 4ebc1086a..2b6e2dea3 100644
--- a/src/lerobot/datasets/v21/convert_dataset_v20_to_v21.py
+++ b/src/lerobot/datasets/v21/convert_dataset_v20_to_v21.py
@@ -13,20 +13,24 @@
 # limitations under the License.
 
 """
-This script will help you convert any LeRobot dataset already pushed to the hub from codebase version 2.0 to
-2.1. It will:
+This script converts a LeRobot dataset already pushed to the Hub from codebase version 2.0 to 2.1.
+It downloads metadata from a SOURCE dataset repo, computes/validates per-episode stats, updates
+the codebase version in `info.json`, and uploads the result to a DESTINATION dataset repo.
+It will:
 
 - Generate per-episodes stats and writes them in `episodes_stats.jsonl`
 - Check consistency between these new stats and the old ones.
 - Remove the deprecated `stats.json`.
 - Update codebase_version in `info.json`.
-- Push this new version to the hub on the 'main' branch and tags it with "v2.1".
+- Push this new version to the destination repo/branch and tag it with the current codebase version.
 
 Usage:
 
 ```bash
 python -m lerobot.datasets.v21.convert_dataset_v20_to_v21 \
-    --repo-id=aliberts/koch_tutorial
+    --source-repo-id=namespace/source_dataset \
+    --dest-repo-id=namespace/destination_dataset \
+    --branch=main
 ```
 
 """
@@ -54,48 +58,67 @@ class SuppressWarnings:
 
 
 def convert_dataset(
-    repo_id: str,
+    source_repo_id: str,
+    dest_repo_id: str,
     branch: str | None = None,
     num_workers: int = 4,
 ):
+    # Download metadata from the source repo at v2.0
     with SuppressWarnings():
-        dataset = LeRobotDataset(repo_id, revision=V20, force_cache_sync=True)
+        dataset = LeRobotDataset(source_repo_id, revision=V20, force_cache_sync=True)
 
+    # Ensure we recompute fresh episodes stats
     if (dataset.root / EPISODES_STATS_PATH).is_file():
         (dataset.root / EPISODES_STATS_PATH).unlink()
 
+    # Compute and validate stats
     convert_stats(dataset, num_workers=num_workers)
     ref_stats = load_stats(dataset.root)
     check_aggregate_stats(dataset, ref_stats)
 
+    # Update codebase version in info.json
     dataset.meta.info["codebase_version"] = CODEBASE_VERSION
     write_info(dataset.meta.info, dataset.root)
 
-    dataset.push_to_hub(branch=branch, tag_version=False, allow_patterns="meta/")
-
-    # delete old stats.json file
-    if (dataset.root / STATS_PATH).is_file:
+    # Remove deprecated stats.json locally so it won't be uploaded
+    if (dataset.root / STATS_PATH).is_file():
         (dataset.root / STATS_PATH).unlink()
 
+    # Push only meta/ to destination repo
     hub_api = HfApi()
-    if hub_api.file_exists(
-        repo_id=dataset.repo_id, filename=STATS_PATH, revision=branch, repo_type="dataset"
-    ):
-        hub_api.delete_file(
-            path_in_repo=STATS_PATH, repo_id=dataset.repo_id, revision=branch, repo_type="dataset"
-        )
+    hub_api.create_repo(repo_id=dest_repo_id, private=False, repo_type="dataset", exist_ok=True)
+    if branch:
+        hub_api.create_branch(repo_id=dest_repo_id, branch=branch, repo_type="dataset", exist_ok=True)
 
-    hub_api.create_tag(repo_id, tag=CODEBASE_VERSION, revision=branch, repo_type="dataset")
+    hub_api.upload_folder(
+        repo_id=dest_repo_id,
+        folder_path=str(dataset.root),
+        repo_type="dataset",
+        revision=branch,
+        allow_patterns="meta/",
+    )
+
+    # Ensure old stats.json is deleted on destination
+    if hub_api.file_exists(repo_id=dest_repo_id, filename=STATS_PATH, revision=branch, repo_type="dataset"):
+        hub_api.delete_file(path_in_repo=STATS_PATH, repo_id=dest_repo_id, revision=branch, repo_type="dataset")
+
+    # Tag destination with current codebase version
+    hub_api.create_tag(dest_repo_id, tag=CODEBASE_VERSION, revision=branch, repo_type="dataset")
 
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
     parser.add_argument(
-        "--repo-id",
+        "--source-repo-id",
         type=str,
         required=True,
-        help="Repository identifier on Hugging Face: a community or a user name `/` the name of the dataset "
-        "(e.g. `lerobot/pusht`, `cadene/aloha_sim_insertion_human`).",
+        help="Source dataset repo id to download from (must be v2.0).",
+    )
+    parser.add_argument(
+        "--dest-repo-id",
+        type=str,
+        required=True,
+        help="Destination dataset repo id to upload the converted metadata to.",
     )
     parser.add_argument(
         "--branch",