included low pass filter in package and add to plot_data example

build/common/pyproject_utils.py

@@ -3,13 +3,22 @@
 from __future__ import annotations
 
 import ast
+import importlib.util
 import subprocess
 import sys
 from pathlib import Path
 
 _BUILD_ROOT = Path(__file__).resolve().parents[1]
-if str(_BUILD_ROOT) not in sys.path:
-    sys.path.insert(0, str(_BUILD_ROOT))
+
+
+def _load_wheel_layout_module():
+    layout_path = _BUILD_ROOT / "wheel" / "layout.py"
+    spec = importlib.util.spec_from_file_location("_orisys_build_wheel_layout", layout_path)
+    if spec is None or spec.loader is None:
+        raise ImportError(f"Cannot load wheel layout helper from {layout_path}")
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
 
 
 def _load_toml(text: str) -> dict:
@@ -94,7 +103,7 @@ def bundle_items(repo_root: Path) -> list[dict]:
 
 def bundle_data_files(repo_root: Path) -> list[tuple[str, list[str]]]:
     """Map bundle items marked dev_install=true to setuptools data_files entries."""
-    from wheel.layout import resolve_bundle_source_files
+    resolve_bundle_source_files = _load_wheel_layout_module().resolve_bundle_source_files
 
     grouped: dict[str, list[str]] = {}
     for item in bundle_items(repo_root):