fix(ci): fix cibuildwheel builds across linux, macos, and free-threaded python

- Make copy_build_files robust when ../cpp is not present in isolated container mounts
- Skip experimental free-threaded python builds (cp*t-*) in cibuildwheel
- Bump macOS deployment target to 13.3 for C++20 std::format float support
- Fix -Wbraced-scalar-init compiler warnings in pybind11 array constructors

Author: Neiko2002

.github/workflows/BuildAndPublish.yml

@@ -42,8 +42,8 @@ jobs:
         CIBW_ARCHS: auto64
         CIBW_BUILD_FRONTEND: "pip; args: --verbose"
         CIBW_ENVIRONMENT: "FORCE_AVX2=1 CMAKE_BUILD_PARALLEL_LEVEL=4"
-        CIBW_ENVIRONMENT_MACOS: "FORCE_AVX2=1 MACOSX_DEPLOYMENT_TARGET=11.00 CMAKE_BUILD_PARALLEL_LEVEL=4"
-        CIBW_SKIP: "cp314t-* pp*win*"
+        CIBW_ENVIRONMENT_MACOS: "FORCE_AVX2=1 MACOSX_DEPLOYMENT_TARGET=13.3 CMAKE_BUILD_PARALLEL_LEVEL=4"
+        CIBW_SKIP: "cp*t-* pp*win*"
 
     # upload artifacts
     - name: Upload Build Artifacts

.github/workflows/BuildAndTest.yml

@@ -38,8 +38,8 @@ jobs:
         CIBW_ARCHS: auto64
         CIBW_BUILD_FRONTEND: "pip; args: --verbose"
         CIBW_ENVIRONMENT: "FORCE_AVX2=1 CMAKE_BUILD_PARALLEL_LEVEL=4"
-        CIBW_ENVIRONMENT_MACOS: "FORCE_AVX2=1 MACOSX_DEPLOYMENT_TARGET=11.00 CMAKE_BUILD_PARALLEL_LEVEL=4"
-        CIBW_SKIP: "cp314t-* pp*win*"
+        CIBW_ENVIRONMENT_MACOS: "FORCE_AVX2=1 MACOSX_DEPLOYMENT_TARGET=13.3 CMAKE_BUILD_PARALLEL_LEVEL=4"
+        CIBW_SKIP: "cp*t-* pp*win*"
 
   build_sdist:
     runs-on: ubuntu-latest

python/README.md

@@ -79,8 +79,9 @@ Build source distributions (`sdist`) and binary wheels:
 uv run python -m build
 ```
 
-To build manylinux/musllinux wheels for Linux distribution via PyPI:
+To build manylinux/musllinux wheels for Linux distribution via PyPI (ensure `copy_build_files` has been executed first):
 ```bash
+uv run python setup.py copy_build_files
 cibuildwheel --archs auto64 --output-dir dist
 ```
 

python/pyproject.toml

@@ -54,6 +54,7 @@ filterwarnings = [
 testpaths = ["tests"]
 
 [tool.cibuildwheel]
+skip = "cp*t-* pp*win*"
 test-command = "pytest {project}"
 test-extras = ["test"]
 

python/setup.py

@@ -55,6 +55,11 @@ def run(self):
         copy_dirs = [(os.path.join("..", "cpp"), "lib")]
 
         for src, dst in copy_dirs:
+            if not os.path.exists(src):
+                if os.path.exists(dst) and any(Path(dst).iterdir()):
+                    print(f"Source '{src}' not found, but '{dst}' already exists and contains files. Skipping copy.")
+                    continue
+                raise FileNotFoundError(f"Source directory '{src}' does not exist and '{dst}' is not populated.")
             print(f"Copying {src} to {dst}")
             shutil.copytree(src, dst, dirs_exist_ok=True, ignore=ignore_dirs)
         print("Files copied successfully.")

python/src/deg_cpp/deglib_cpp.cpp

@@ -137,14 +137,14 @@ py::object graph_search_single_wrapper(
     }
 
     const size_t count = result.size();
-    py::array_t<uint32_t> result_indices({static_cast<py::ssize_t>(count)});
+    py::array_t<uint32_t> result_indices(static_cast<py::ssize_t>(count));
     py::buffer_info result_indices_info = result_indices.request();
     auto result_indices_ptr = static_cast<uint32_t*>(result_indices_info.ptr);
 
     py::array_t<float> result_distances;
     float* result_distances_ptr = nullptr;
     if (return_distances) {
-        result_distances = py::array_t<float>({static_cast<py::ssize_t>(count)});
+        result_distances = py::array_t<float>(static_cast<py::ssize_t>(count));
         result_distances_ptr = static_cast<float*>(result_distances.request().ptr);
     }
 
@@ -374,14 +374,14 @@ py::object graph_explore_single_wrapper(
     }
 
     const size_t count = result.size();
-    py::array_t<uint32_t> result_indices({static_cast<py::ssize_t>(count)});
+    py::array_t<uint32_t> result_indices(static_cast<py::ssize_t>(count));
     py::buffer_info result_indices_info = result_indices.request();
     auto result_indices_ptr = static_cast<uint32_t*>(result_indices_info.ptr);
 
     py::array_t<float> result_distances;
     float* result_distances_ptr = nullptr;
     if (return_distances) {
-        result_distances = py::array_t<float>({static_cast<py::ssize_t>(count)});
+        result_distances = py::array_t<float>(static_cast<py::ssize_t>(count));
         result_distances_ptr = static_cast<float*>(result_distances.request().ptr);
     }
 
@@ -416,11 +416,11 @@ graph_has_path_wrapper(const G& graph, const std::vector<uint32_t>& entry_vertex
     std::vector<deglib::search::ObjectDistance> path = graph.hasPath(entry_vertex_indices, to_vertex, eps, k);
 
     const size_t count = path.size();
-    py::array_t<uint32_t> result_indices({static_cast<py::ssize_t>(count)});
+    py::array_t<uint32_t> result_indices(static_cast<py::ssize_t>(count));
     py::buffer_info result_indices_info = result_indices.request();
     auto result_indices_ptr = static_cast<uint32_t*>(result_indices_info.ptr);
 
-    py::array_t<float> result_distances({static_cast<py::ssize_t>(count)});
+    py::array_t<float> result_distances(static_cast<py::ssize_t>(count));
     py::buffer_info result_distances_info = result_distances.request();
     auto result_distances_ptr = static_cast<float*>(result_distances_info.ptr);
 
@@ -534,12 +534,12 @@ std::tuple<py::array_t<uint32_t>, py::array_t<float>> dynamic_exploration_graph_
 ) {
     deglib::search::ResultSet result = graph.explore(entry_external_label, k, max_distance_computation_count, eps, include_entry, filter);
 
-    py::array_t<uint32_t> result_indices({static_cast<py::ssize_t>(k)});
+    py::array_t<uint32_t> result_indices(static_cast<py::ssize_t>(k));
     py::buffer_info result_indices_info = result_indices.request();
     auto result_indices_ptr = static_cast<uint32_t*>(result_indices_info.ptr);
     std::fill_n(result_indices_ptr, k, 0);
 
-    py::array_t<float> result_distances({static_cast<py::ssize_t>(k)});
+    py::array_t<float> result_distances(static_cast<py::ssize_t>(k));
     py::buffer_info result_distances_info = result_distances.request();
     auto result_distances_ptr = static_cast<float*>(result_distances_info.ptr);
     std::fill_n(result_distances_ptr, k, std::numeric_limits<float>::quiet_NaN());

python/src/deglib/builder.py

@@ -79,7 +79,6 @@ def __init__(
         self.graph = graph
         self.optimization_target = optimization_target
 
-
     def add_entry(self, external_label: int | Iterable[int] | np.ndarray, feature: np.ndarray):
         """
         Provide the builder with new entries to be added to the graph during the build process.