Refine the packaging infrastructure.

.gitignore

@@ -182,7 +182,7 @@ cython_debug/
 #  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
+.idea/
 
 
 
@@ -645,4 +645,4 @@ FodyWeavers.xsd
 *.msp
 
 # JetBrains Rider
-*.sln.iml
+*.sln.iml

CMakeLists.txt

@@ -1,12 +1,61 @@
-#cmake_minimum_required(VERSION 3.23 FATAL_ERROR)
-cmake_minimum_required(VERSION 3.18 FATAL_ERROR)
+# cmake version 3.23 or higher is needed to support
+# the argument CUDA_ARCHITECTURES all-major
+cmake_minimum_required(VERSION 3.23 FATAL_ERROR)
 
-project(leapct)
+project(leapct LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-ENABLE_TESTING()
+# Find a default GPU accelerator language.
+set(_default_accelerator_type "None")
+include(CheckLanguage)
+check_language(HIP)
+if(CMAKE_HIP_COMPILER)
+    set(_default_accelerator_type "AMD")
+endif()
+check_language(CUDA)
+if(CMAKE_CUDA_COMPILER)
+    set(_default_accelerator_type "NVIDIA")
+endif()
+
+set(LEAP_GPU "$_default_accelerator_type" CACHE STRING "GPU acceleration type")
+unset(_default_accelerator_type)
+
+set_property(CACHE LEAP_GPU PROPERTY STRINGS "NVIDIA" "AMD" "None")
+# Extract "STRINGS" property of the parameter
+get_property(OPT_STRINGS CACHE LEAP_GPU PROPERTY STRINGS)
+# Check that value of the parameter is inside "STRINGS" list.
+if (NOT LEAP_GPU IN_LIST OPT_STRINGS)
+  message(FATAL_ERROR "Wrong value of the parameter 'LEAP_GPU': ${LEAP_GPU}")
+endif ()
+message(STATUS "LEAP_GPU selected accelerator type ${LEAP_GPU}")
+
+string(TOUPPER "${LEAP_GPU}" LEAP_GPU)
+if (LEAP_GPU STREQUAL "NVIDIA")
+    # To minimize binary size and compile time, users are suggested to
+    # set the CUDAARCHS environment variable or define the CMake variable CMAKE_CUDA_ARCHITECTURES
+    # to "native" if building specifically for the GPU visible to the build environment,
+    # or to an explicit numerical architecture code, such as "70"
+    if(NOT DEFINED CMAKE_CUDA_ARCHITECTURES)
+      set(CMAKE_CUDA_ARCHITECTURES all-major)
+    endif()
+    enable_language(CUDA)
+    set(LEAP_CUDA ON)
+elseif (LEAP_GPU STREQUAL "AMD")
+    # Users are advised to set CMAKE_HIP_ARCHITECTURES to a minimal subset.
+    # See also https://rocm.docs.amd.com/en/latest/conceptual/cmake-packages.html#using-hip-in-cmake
+    enable_language(HIP)
+    set(LEAP_HIP ON)
+elseif (LEAP_GPU STREQUAL "NONE")
+    set(LEAP_CPU_ONLY ON)
+else ()
+    message(FATAL_ERROR "CMake scripting error: ${LEAP_GPU} didn't match.")
+endif ()
+
+if((BUILD_TESTING) OR (NOT DEFINED BUILD_TESTING))
+    ENABLE_TESTING()
+endif()
 
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)

pyproject.toml

@@ -0,0 +1,44 @@
+[build-system]
+requires = ["scikit-build-core>=0.10"]
+build-backend = "scikit_build_core.build"
+
+[project]
+name = "leapct"
+dynamic = ["version"]
+description = "LivermorE AI Projector for Computed Tomography (LEAPCT)"
+authors = [
+    { name = "Kyle Champley", email = "champley@gmail.com" },
+    { name = "Hyojin Kim", email = "hkim@llnl.gov" }
+]
+readme = "README.md"
+license-files = ["LICENSE"]
+keywords = [
+    "Machine Learning", "ML", "AI", "Computed Tomography", "CT",
+    "Differentiable Project", "Forward Project", "Back Project"
+]
+requires-python = ">=3.6"
+dependencies = [
+    "imageio",
+    "matplotlib",
+    "numpy",
+    "scipy",
+]
+
+[tool.scikit-build]
+minimum-version = "build-system.requires"
+cmake.version = ">=3.23"
+metadata.version.provider = "scikit_build_core.metadata.setuptools_scm"
+
+wheel.packages = ["src/leap_filter_sequence", "src/leap_preprocessing_algorithms", "src/leapctype", "src/leaptorch"]
+wheel.py-api = "py3"
+# If we have to issue revised packages for the same software version,
+# we can increment a build number:
+wheel.build-tag = 0
+
+[tool.scikit-build.cmake.define]
+BUILD_TESTING = false
+LEAP_GPU = "NVIDIA"
+
+[tool.setuptools_scm]
+# There are several packages. Is there an appropriate place to put a package version?
+#write_to = "src/leap/_version.py"