Fix storage clients on windows

.github/workflows/test_windows.yml

@@ -0,0 +1,37 @@
+name: CI
+
+permissions: {}
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: ["**"]
+
+jobs:
+  tests-windows:
+    name: Run tests on Windows
+    runs-on: windows-2022
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          lfs: true
+      - name: Set up uv
+        uses: astral-sh/setup-uv@v2
+        with:
+          enable-cache: true
+          cache-dependency-glob: "uv.lock"
+      - name: "Set up Python"
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+      - name: Sync
+        run: uv sync --all-packages --frozen
+      - name: Run datasets tests
+        run: cd tilebox-datasets && uv run --all-packages pytest -Wall -Werror -v .
+      - name: Run grpc tests
+        run: cd tilebox-grpc && uv run --all-packages pytest -Wall -Werror -v .
+      - name: Run storage tests
+        run: cd tilebox-storage && uv run --all-packages pytest -Wall -Werror -v .
+      - name: Run workflows tests
+        run: cd tilebox-workflows && uv run --all-packages pytest -Wall -Werror -v .

.pre-commit-config.yaml

@@ -9,7 +9,7 @@ repos:
     hooks:
       - id: sync-with-uv
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.14.3
+    rev: v0.14.7
     hooks:
       - id: ruff-check
         args: [--fix, --exit-non-zero-on-fix]

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- `tilebox-storage`: Fixed a bug on Windows, where the `CopernicusStorageClient` and `USGSLandsatStorageClient` were
+  unable to download products due to an incorrect path separator in the underlying S3 paths.
+
 ## [0.45.0] - 2025-11-17
 
 ### Added

tilebox-storage/tests/test_storage_client.py

@@ -17,6 +17,7 @@
     UmbraStorageClient,
     USGSLandsatStorageClient,
     _HttpClient,
+    list_object_paths,
 )
 from tilebox.storage.granule import (
     ASFStorageGranule,
@@ -149,6 +150,22 @@ async def test_cached_download(httpx_mock: HTTPXMock, tmp_path: Path, granule: A
     assert len(httpx_mock.get_requests(url=granule.urls.data)) == 1
 
 
+@pytest.mark.asyncio
+async def test_list_object_paths() -> None:
+    with TemporaryDirectory() as tmp_path:
+        store_path = Path(tmp_path) / "store"
+        store_path.mkdir(exist_ok=True, parents=True)
+        store = LocalStore(store_path)
+
+        await store.put_async("prefix/object1", b"content1")
+        await store.put_async("prefix/object2", b"content2")
+        await store.put_async("prefix/subdir/object3", b"content3")
+
+        objects = await list_object_paths(store, "prefix")
+        # we always need a forward slash in our paths, even on windows
+        assert objects == ["object1", "object2", "subdir/object3"]
+
+
 @pytest.mark.asyncio
 @given(umbra_granules())
 @settings(max_examples=1, deadline=timedelta(milliseconds=100))

tilebox-storage/tilebox/storage/aio.py

@@ -7,6 +7,7 @@
 from asyncio import Queue, QueueEmpty
 from collections.abc import AsyncIterator
 from pathlib import Path
+from pathlib import PurePosixPath as ObjectPath
 from typing import Any, TypeAlias
 
 import anyio
@@ -259,8 +260,8 @@ async def destroy_cache(self) -> None:
 
 async def list_object_paths(store: ObjectStore, prefix: str) -> list[str]:
     objects = await obs.list(store, prefix).collect_async()
-    prefix_path = Path(prefix)
-    return sorted(str(Path(obj["path"]).relative_to(prefix_path)) for obj in objects)
+    prefix_path = ObjectPath(prefix)
+    return sorted(str(ObjectPath(obj["path"]).relative_to(prefix_path)) for obj in objects)
 
 
 async def download_objects(  # noqa: PLR0913
@@ -299,7 +300,7 @@ async def _download_worker(
 async def _download_object(
     store: ObjectStore, prefix: str, obj: str, output_dir: Path, show_progress: bool = True
 ) -> Path:
-    key = str(Path(prefix) / obj)
+    key = str(ObjectPath(prefix) / obj)
     output_path = output_dir / obj
     if output_path.exists():  # already cached
         return output_path
@@ -609,7 +610,7 @@ async def _list_objects(self, datapoint: xr.Dataset | CopernicusStorageGranule)
         granule = CopernicusStorageGranule.from_data(datapoint)
         # special handling for Sentinel-5P, where the location is not a folder but a single file
         if granule.location.endswith(".nc"):
-            return [Path(granule.granule_name).name]
+            return [str(ObjectPath(granule.granule_name))]
 
         return await list_object_paths(self._store, _copernicus_s3_prefix(granule))
 

tilebox-storage/tilebox/storage/granule.py

@@ -1,6 +1,6 @@
 from dataclasses import dataclass
 from datetime import datetime
-from pathlib import Path
+from pathlib import PurePosixPath as ObjectPath
 
 import xarray as xr
 
@@ -103,7 +103,7 @@ def _thumbnail_relative_to_eodata_location(thumbnail_url: str, location: str) ->
     url_path = thumbnail_url.split("?path=")[-1]
     url_path = url_path.removeprefix("/")
     location = location.removeprefix("/eodata/")
-    return str(Path(url_path).relative_to(location))
+    return str(ObjectPath(url_path).relative_to(location))
 
 
 @dataclass