8394 Update bundle download API (#8403)

Fixes #8394  .

### Description

Add support to download monaihosting bundles from Huggingface.

### Types of changes
<!--- Put an `x` in all the boxes that apply, and remove the not
applicable items -->
- [x] Non-breaking change (fix or new feature that would not break
existing functionality).
- [ ] Breaking change (fix or new feature that would cause existing
functionality to change).
- [ ] New tests added to cover the changes.
- [ ] Integration tests passed locally by running `./runtests.sh -f -u
--net --coverage`.
- [ ] Quick tests passed locally by running `./runtests.sh --quick
--unittests --disttests`.
- [ ] In-line docstrings updated.
- [ ] Documentation updated, tested `make html` command in the `docs/`
folder.

---------

Signed-off-by: Yiheng Wang <vennw@nvidia.com>
Co-authored-by: YunLiu <55491388+KumoLiu@users.noreply.github.com>

Author: yiheng-wang-nv

monai/bundle/scripts.py

@@ -528,7 +528,9 @@ def download(
             If source is "ngc_private", you need specify the NGC_API_KEY in the environment variable.
         repo: repo name. This argument is used when `url` is `None` and `source` is "github" or "huggingface_hub".
             If `source` is "github", it should be in the form of "repo_owner/repo_name/release_tag".
-            If `source` is "huggingface_hub", it should be in the form of "repo_owner/repo_name".
+            If `source` is "huggingface_hub", it should be in the form of "repo_owner/repo_name". Please note that
+            bundles for "monaihosting" source are also hosted on Hugging Face Hub, but the "repo_id" is always in the form
+            of "MONAI/bundle_name", therefore, this argument is not required for "monaihosting" source.
             If `source` is "ngc_private", it should be in the form of "org/org_name" or "org/org_name/team/team_name",
             or you can specify the environment variable NGC_ORG and NGC_TEAM.
         url: url to download the data. If not `None`, data will be downloaded directly
@@ -600,11 +602,15 @@ def download(
             _download_from_github(repo=repo_, download_path=bundle_dir_, filename=name_ver, progress=progress_)
         elif source_ == "monaihosting":
             try:
+                extract_path = os.path.join(bundle_dir_, name_)
+                huggingface_hub.snapshot_download(repo_id=f"MONAI/{name_}", revision=version_, local_dir=extract_path)
+            except (huggingface_hub.errors.RevisionNotFoundError, huggingface_hub.errors.RepositoryNotFoundError):
+                # if bundle or version not found from huggingface, download from ngc monaihosting
                 _download_from_monaihosting(
                     download_path=bundle_dir_, filename=name_, version=version_, progress=progress_
                 )
             except urllib.error.HTTPError:
-                # for monaihosting bundles, if cannot download from default host, download according to bundle_info
+                # if also cannot download from ngc monaihosting, download according to bundle_info
                 _download_from_bundle_info(
                     download_path=bundle_dir_, filename=name_, version=version_, progress=progress_
                 )

tests/bundle/test_bundle_download.py

@@ -63,6 +63,8 @@
 
 TEST_CASE_6 = [["models/model.pt", "configs/train.json"], "renalStructures_CECT_segmentation", "0.1.0"]
 
+TEST_CASE_6_HF = [["models/model.pt", "configs/train.yaml"], "mednist_ddpm", "1.0.1"]
+
 TEST_CASE_7 = [
     ["model.pt", "model.ts", "network.json", "test_output.pt", "test_input.pt"],
     "test_bundle",
@@ -193,6 +195,7 @@ def test_ngc_private_source_download_bundle(self, bundle_files, bundle_name, _ur
 
     @parameterized.expand([TEST_CASE_6])
     @skip_if_quick
+    @skipUnless(has_huggingface_hub, "Requires `huggingface_hub`.")
     def test_monaihosting_source_download_bundle(self, bundle_files, bundle_name, version):
         with skip_if_downloading_fails():
             # download a single file from url, also use `args_file`
@@ -239,6 +242,7 @@ def test_list_latest_versions(self):
         self.assertEqual(_list_latest_versions(data), ["1.1", "1.0"])
 
     @skip_if_quick
+    @skipUnless(has_huggingface_hub, "Requires `huggingface_hub`.")
     @patch("monai.bundle.scripts.get_versions", return_value={"version": "1.2"})
     def test_download_monaihosting(self, mock_get_versions):
         """Test checking MONAI version from a metadata file."""
@@ -333,6 +337,7 @@ def test_load_weights(self, bundle_files, bundle_name, repo, device, model_file)
 
     @parameterized.expand([TEST_CASE_8])
     @skip_if_quick
+    @skipUnless(has_huggingface_hub, "Requires `huggingface_hub`.")
     def test_load_weights_with_net_override(self, bundle_name, device, net_override):
         with skip_if_downloading_fails():
             # download bundle, and load weights from the downloaded path