Transition build system of cuda_cccl to scikit-build-core

python/cuda_cccl/.gitignore

@@ -1,2 +1,4 @@
-cuda/cccl/include
+build
+dist
 *egg-info
+*~

python/cuda_cccl/CMakeLists.txt

@@ -0,0 +1,31 @@
+cmake_minimum_required(VERSION 3.21...3.31 FATAL_ERROR)
+
+# include_guard(GLOBAL)
+
+project(
+    CCCL_HEADERS
+    VERSION ${SKBUILD_PROJECT_VERSION}
+    LANGUAGES C CXX
+    DESCRIPTION "Headers of NVIDIA CUDA Core Compute Libraries"
+)
+
+add_subdirectory(../.. _parent_cccl)
+
+find_package(CUB REQUIRED)
+find_package(Thrust REQUIRED)
+find_package(libcudacxx REQUIRED)
+
+set(_dest_incl_dir cuda/cccl/include)
+
+install(
+    DIRECTORY ${CUB_SOURCE_DIR}/cub
+    DESTINATION ${_dest_incl_dir}
+)
+install(
+    DIRECTORY ${Thrust_SOURCE_DIR}/thrust
+    DESTINATION ${_dest_incl_dir}
+)
+install(
+    DIRECTORY ${libcudacxx_SOURCE_DIR}/include
+    DESTINATION ${_dest_incl_dir}
+)

python/cuda_cccl/LICENSE

@@ -0,0 +1 @@
+../../LICENSE

python/cuda_cccl/cuda/cccl/include/__init__.py

@@ -0,0 +1 @@
+# Intentionally empty

python/cuda_cccl/cuda/cccl/include_paths.py

@@ -57,7 +57,7 @@ def get_include_paths() -> IncludePaths:
 
     return IncludePaths(
         cuda=cuda_incl,
-        libcudacxx=cccl_incl / "libcudacxx",
+        libcudacxx=cccl_incl,
         cub=cccl_incl,
         thrust=cccl_incl,
     )

python/cuda_cccl/pyproject.toml

@@ -3,27 +3,49 @@
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 [build-system]
-requires = ["setuptools>=61.0.0"]
-build-backend = "setuptools.build_meta"
+requires = ["scikit-build-core>=0.10", "setuptools"]
+build-backend = "scikit_build_core.build"
 
 [project]
 name = "cuda-cccl"
+dynamic = ["version"]
 description = "Experimental Package with CCCL headers to support JIT compilation"
 authors = [{ name = "NVIDIA Corporation" }]
 classifiers = [
   "Programming Language :: Python :: 3 :: Only",
   "Environment :: GPU :: NVIDIA CUDA",
   "License :: OSI Approved :: Apache Software License",
 ]
+license-files = ["LICENSE"]
 requires-python = ">=3.9"
-dynamic = ["version", "readme"]
+readme = { file = "README.md", content-type = "text/markdown" }
 
 [project.urls]
 Homepage = "https://github.com/NVIDIA/cccl"
 
-[tool.setuptools.dynamic]
-version = { attr = "cuda.cccl._version.__version__" }
-readme = { file = ["README.md"], content-type = "text/markdown" }
+[tool.scikit-build]
+minimum-version = "build-system.requires"
+build-dir = "build/{wheel_tag}"
 
-[tool.setuptools.package-data]
-cuda = ["cccl/include/**/*"]
+[tool.scikit-build.cmake]
+version = ">=3.21"
+args = []
+build-type = "Release"
+source-dir = "."
+
+[tool.scikit-build.ninja]
+version = ">=1.11"
+make-fallback = true
+
+[tool.scikit-build.wheel]
+py-api = "py3"
+platlib = ""
+
+[tool.scikit-build.wheel.packages]
+"cuda" = "cuda"
+"cuda/cccl" = "cuda/cccl"
+
+[tool.scikit-build.metadata.version]
+provider = "scikit_build_core.metadata.regex"
+input = "cuda/cccl/_version.py"
+# use default regex

python/cuda_cccl/test/test_cuda_cccl.py

@@ -0,0 +1,21 @@
+import cuda.cccl as c4l
+
+
+def test_headers():
+    inc_paths = c4l.get_include_paths()
+    assert hasattr(inc_paths, "cuda")
+    assert hasattr(inc_paths, "cub")
+    assert hasattr(inc_paths, "libcudacxx")
+    assert hasattr(inc_paths, "thrust")
+    tpl = inc_paths.as_tuple()
+    assert len(tpl) == 4
+    thrust_, cub_, cudacxx_, cuda_ = tpl
+    assert cuda_ == inc_paths.cuda
+    assert cub_ == inc_paths.cub
+    assert cudacxx_ == inc_paths.libcudacxx
+    assert thrust_ == inc_paths.thrust
+
+
+def test_version():
+    v = c4l.__version__
+    assert isinstance(v, str)