Skip unavailable shape-stat kernels

Generated with the assistance of an AI coding tool.

src/ifcopenshell-python/ifcopenshell/geom/main.py

@@ -170,7 +170,12 @@ SETTING = Literal[
 # It's possible to use any hybrid combination by the format below:
 # "hybrid-library1-library2".
 # List is updated from abstract_kernel.cpp.
-GEOMETRY_LIBRARY = Literal["cgal", "cgal-simple", "opencascade", "hybrid-cgal-simple-opencascade"]
+GEOMETRY_LIBRARY = Literal["cgal", "cgal-simple", "manifold", "opencascade", "hybrid-cgal-simple-opencascade"]
+
+
+def has_geometry_library(geometry_library: str) -> bool:
+    """Return whether a geometry kernel library can be loaded."""
+    return ifcopenshell_wrapper.has_geometry_library(geometry_library)
 
 
 class missing_setting:

src/ifcopenshell-python/ifcopenshell/ifcopenshell_wrapper.pyi

@@ -1623,6 +1623,7 @@ def arrange_polygons(
 def get_plugin_search_paths() -> tuple[str, ...]: ...
 def set_plugin_search_paths(paths: Sequence[str]) -> None: ...
 def clear_plugin_search_paths() -> None: ...
+def has_geometry_library(geometry_library: str) -> bool: ...
 def clear_schemas(): ...
 def construct_iterator(geometry_library, settings, file, num_threads, logger=None): ...
 def construct_iterator_with_include_exclude(

src/ifcopenshell-python/test/test_shape_stats.py

@@ -14,17 +14,27 @@ test_files = repo_root / "test" / "input" / "tests"
 settings = ifcopenshell.geom.settings()
 
 testdata = list(csv.reader((test_files / "data.csv").open(newline="")))[1:]
+kernels = [
+    pytest.param(
+        kernel,
+        marks=pytest.mark.skipif(
+            not ifcopenshell.geom.has_geometry_library(kernel),
+            reason=f"{kernel} geometry kernel is unavailable",
+        ),
+    )
+    for kernel in ("manifold", "opencascade", "cgal")
+]
 
 print(testdata)
 
 
 @pytest.mark.parametrize("fn,area,volume", testdata)
-def test_conversion(fn, area, volume):
+@pytest.mark.parametrize("kernel", kernels)
+def test_conversion(fn, area, volume, kernel):
     f = ifcopenshell.open(test_files / fn)
     elem = next(inst for inst in f.by_type("IfcElement") if not inst.is_a("IfcOpeningElement"))
-    for kernel in ("manifold", "opencascade", "cgal"):
+    shp = ifcopenshell.geom.create_shape(settings, elem, geometry_library=kernel)
-        shp = ifcopenshell.geom.create_shape(settings, elem, geometry_library=kernel)
+    if area:
-        if area:
+        assert pytest.approx(float(area), rel=0.05) == ifcopenshell.util.shape.get_area(shp.geometry)
-            assert pytest.approx(float(area), rel=0.05) == ifcopenshell.util.shape.get_area(shp.geometry)
+    if volume:
-        if volume:
+        assert pytest.approx(float(volume), rel=0.02) == ifcopenshell.util.shape.get_volume(shp.geometry)
-            assert pytest.approx(float(volume), rel=0.02) == ifcopenshell.util.shape.get_volume(shp.geometry)

src/ifcwrap/IfcPython.i

@@ -286,6 +286,7 @@
 	#include "../ifcgeom/conversion_result.h"
 	#include "../ifcgeom/hybrid_kernel.h"
 	#include "../ifcgeom/geometry_serializer.h"
+	#include "../ifcgeom/kernel_plugin.h"
 
 	#include "../ifcparse/express.h"
 	#include "../ifcparse/file.h"
@@ -325,6 +326,16 @@ std::vector<std::string> get_plugin_search_paths() {
 void clear_plugin_search_paths() {
 	ifcopenshell::plugin::clear_search_paths();
 }
+
+bool has_geometry_library(const std::string& geometry_library) {
+	auto& registry = ifcopenshell::geom::kernels::kernel_registry_instance();
+	try {
+		return registry.has(geometry_library) ||
+			ifcopenshell::geom::kernels::load_kernel_plugin(registry, geometry_library);
+	} catch (const std::exception&) {
+		return false;
+	}
+}
 %}
 
 %include "IfcGeomWrapper.i"