feat(core-cython-hello): Switch to using cython-cmake

Author: jcfr

projects/core-cython-hello/CMakeLists.txt

@@ -6,6 +6,9 @@ find_package(
   Python
   COMPONENTS Interpreter Development.Module
   REQUIRED)
-find_program(CYTHON "cython")
+
+find_package(
+  Cython
+  REQUIRED)
 
 add_subdirectory(hello)

projects/core-cython-hello/hello/CMakeLists.txt

@@ -1,14 +1,9 @@
-add_custom_command(
-  OUTPUT _hello.c
-  DEPENDS _hello.pyx
-  COMMAND "${CYTHON}"
-    "${CMAKE_CURRENT_SOURCE_DIR}/_hello.pyx"
-    --output-file "${CMAKE_CURRENT_BINARY_DIR}/_hello.c"
-  VERBATIM
+Cython_compile_pyx(_hello.pyx
+  OUTPUT_VAR _hello_source_file
   )
 
 Python_add_library(_hello
-  MODULE "${CMAKE_CURRENT_BINARY_DIR}/_hello.c"
+  MODULE ${_hello_source_file}
   WITH_SOABI)
 
 install(TARGETS _hello LIBRARY DESTINATION ${SKBUILD_PROJECT_NAME})

projects/core-cython-hello/pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["scikit-build-core[pyproject]", "cython"]
+requires = ["scikit-build-core[pyproject]", "cython", "cython-cmake"]
 build-backend = "scikit_build_core.build"
 
 [project]