Add nanobind and pybind support

Author: timkpaine

README.md

@@ -14,7 +14,7 @@ A simple, extensible C++ build plugin for [hatch](https://hatch.pypa.io/latest/)
 ```toml
 [tool.hatch.build.hooks.hatch-cpp]
 libraries = [
-    {name = "basic_project/extension", sources = ["cpp/basic-project/basic.cpp"], include-dirs = ["cpp"]}
+    {name = "project/extension", sources = ["cpp/project/basic.cpp"], include-dirs = ["cpp"]}
 ]
 ```
 

hatch_cpp/structs.py

@@ -19,6 +19,7 @@
 BuildType = Literal["debug", "release"]
 CompilerToolchain = Literal["gcc", "clang", "msvc"]
 Language = Literal["c", "c++"]
+Binding = Literal["cpython", "pybind11", "nanobind"]
 Platform = Literal["linux", "darwin", "win32"]
 PlatformDefaults = {
     "linux": {"CC": "gcc", "CXX": "g++", "LD": "ld"},
@@ -33,12 +34,18 @@ class HatchCppLibrary(BaseModel):
     name: str
     sources: List[str]
     language: Language = "c++"
+
+    binding: Binding = "cpython"
+    std: Optional[str] = None
+
     include_dirs: List[str] = Field(default_factory=list, alias="include-dirs")
     library_dirs: List[str] = Field(default_factory=list, alias="library-dirs")
     libraries: List[str] = Field(default_factory=list)
+
     extra_compile_args: List[str] = Field(default_factory=list, alias="extra-compile-args")
     extra_link_args: List[str] = Field(default_factory=list, alias="extra-link-args")
     extra_objects: List[str] = Field(default_factory=list, alias="extra-objects")
+
     define_macros: List[str] = Field(default_factory=list, alias="define-macros")
     undef_macros: List[str] = Field(default_factory=list, alias="undef-macros")
 
@@ -82,29 +89,51 @@ def default() -> HatchCppPlatform:
 
     def get_compile_flags(self, library: HatchCppLibrary, build_type: BuildType = "release") -> str:
         flags = ""
+
+        # Python.h
+        library.include_dirs.append(get_path("include"))
+
+        if library.binding == "pybind11":
+            import pybind11
+
+            library.include_dirs.append(pybind11.get_include())
+            if not library.std:
+                library.std = "c++11"
+        elif library.binding == "nanobind":
+            import nanobind
+
+            library.include_dirs.append(nanobind.include_dir())
+            if not library.std:
+                library.std = "c++17"
+            library.sources.append(str(Path(nanobind.include_dir()).parent / "src" / "nb_combined.cpp"))
+            library.include_dirs.append(str((Path(nanobind.include_dir()).parent / "ext" / "robin_map" / "include")))
+
         if self.toolchain == "gcc":
-            flags = f"-I{get_path('include')}"
             flags += " " + " ".join(f"-I{d}" for d in library.include_dirs)
             flags += " -fPIC"
             flags += " " + " ".join(library.extra_compile_args)
             flags += " " + " ".join(f"-D{macro}" for macro in library.define_macros)
             flags += " " + " ".join(f"-U{macro}" for macro in library.undef_macros)
+            if library.std:
+                flags += f" -std={library.std}"
         elif self.toolchain == "clang":
-            flags = f"-I{get_path('include')} "
             flags += " ".join(f"-I{d}" for d in library.include_dirs)
             flags += " -fPIC"
             flags += " " + " ".join(library.extra_compile_args)
             flags += " " + " ".join(f"-D{macro}" for macro in library.define_macros)
             flags += " " + " ".join(f"-U{macro}" for macro in library.undef_macros)
+            if library.std:
+                flags += f" -std={library.std}"
         elif self.toolchain == "msvc":
-            flags = f"/I{get_path('include')} "
             flags += " ".join(f"/I{d}" for d in library.include_dirs)
             flags += " " + " ".join(library.extra_compile_args)
             flags += " " + " ".join(library.extra_link_args)
             flags += " " + " ".join(library.extra_objects)
             flags += " " + " ".join(f"/D{macro}" for macro in library.define_macros)
             flags += " " + " ".join(f"/U{macro}" for macro in library.undef_macros)
             flags += " /EHsc /DWIN32"
+            if library.std:
+                flags += f" /std:{library.std}"
         # clean
         while flags.count("  "):
             flags = flags.replace("  ", " ")
@@ -142,7 +171,6 @@ def get_link_flags(self, library: HatchCppLibrary, build_type: BuildType = "rele
             flags += " " + " ".join(library.extra_link_args)
             flags += " " + " ".join(library.extra_objects)
             flags += " /LD"
-            flags += f" /Fo:{library.name}.obj"
             flags += f" /Fe:{library.name}.pyd"
             flags += " /link /DLL"
             if (Path(executable).parent / "libs").exists():
@@ -178,10 +206,8 @@ def execute(self):
 
     def cleanup(self):
         if self.platform.platform == "win32":
-            for library in self.libraries:
-                temp_obj = Path(f"{library.name}.obj")
-                if temp_obj.exists():
-                    temp_obj.unlink()
+            for temp_obj in Path(".").glob("*.obj"):
+                temp_obj.unlink()
 
 
 class HatchCppBuildConfig(BaseModel):

hatch_cpp/tests/test_project_basic/cpp/basic-project/basic.cpp renamed to hatch_cpp/tests/test_project_basic/cpp/project/basic.cpp

@@ -1,4 +1,4 @@
-#include "basic-project/basic.hpp"
+#include "project/basic.hpp"
 
 PyObject* hello(PyObject*, PyObject*) {
     return PyUnicode_FromString("A string");

hatch_cpp/tests/test_project_basic/cpp/basic-project/basic.hpp renamed to hatch_cpp/tests/test_project_basic/cpp/project/basic.hpp

@@ -14,50 +14,22 @@ dependencies = [
 
 [tool.hatch.build]
 artifacts = [
-    "basic_project/*.dll",
-    "basic_project/*.dylib",
-    "basic_project/*.so",
+    "project/*.dll",
+    "project/*.dylib",
+    "project/*.so",
 ]
 
 [tool.hatch.build.sources]
 src = "/"
 
 [tool.hatch.build.targets.sdist]
-packages = ["basic_project"]
+packages = ["project"]
 
 [tool.hatch.build.targets.wheel]
-packages = ["basic_project"]
+packages = ["project"]
 
 [tool.hatch.build.hooks.hatch-cpp]
 verbose = true
 libraries = [
-    {name = "basic_project/extension", sources = ["cpp/basic-project/basic.cpp"], include-dirs = ["cpp"]}
+    {name = "project/extension", sources = ["cpp/project/basic.cpp"], include-dirs = ["cpp"]}
 ]
-
-# build-function = "hatch_cpp.cpp_builder"
-
-# [tool.hatch.build.hooks.defaults]
-# build-type = "release"
-
-# [tool.hatch.build.hooks.env-vars]
-# TODO: these will all be available via
-# CLI after https://github.com/pypa/hatch/pull/1743
-# e.g. --hatch-cpp-build-type=debug
-# build-type = "BUILD_TYPE"
-# ccache = "USE_CCACHE"
-# manylinux = "MANYLINUX"
-# vcpkg = "USE_VCPKG"
-
-# [tool.hatch.build.hooks.cmake]
-
-# [tool.hatch.build.hooks.vcpkg]
-# triplets = {linux="x64-linux", macos="x64-osx", windows="x64-windows-static-md"}
-# clone = true
-# update = true
-
-# [tool.hatch.build.hooks.hatch-cpp.build-kwargs]
-# path = "cpp"
-
-[tool.pytest.ini_options]
-asyncio_mode = "strict"
-testpaths = "basic_project/tests"

hatch_cpp/tests/test_project_basic/basic_project/__init__.py renamed to hatch_cpp/tests/test_project_basic/project/__init__.py

@@ -0,0 +1,2 @@
+#include "project/basic.hpp"
+

hatch_cpp/tests/test_project_basic/pyproject.toml

@@ -0,0 +1,7 @@
+#pragma once
+#include <nanobind/nanobind.h>
+#include <nanobind/stl/string.h>
+
+NB_MODULE(extension, m) {
+    m.def("hello", []() { return "A string"; });
+}

hatch_cpp/tests/test_project_nanobind/cpp/project/basic.cpp

@@ -0,0 +1,35 @@
+[build-system]
+requires = ["hatchling>=1.20"]
+build-backend = "hatchling.build"
+
+[project]
+name = "hatch-cpp-test-project-basic"
+description = "Basic test project for hatch-cpp"
+version = "0.1.0"
+requires-python = ">=3.9"
+dependencies = [
+    "hatchling>=1.20",
+    "hatch-cpp",
+]
+
+[tool.hatch.build]
+artifacts = [
+    "project/*.dll",
+    "project/*.dylib",
+    "project/*.so",
+]
+
+[tool.hatch.build.sources]
+src = "/"
+
+[tool.hatch.build.targets.sdist]
+packages = ["project"]
+
+[tool.hatch.build.targets.wheel]
+packages = ["project"]
+
+[tool.hatch.build.hooks.hatch-cpp]
+verbose = true
+libraries = [
+    {name = "project/extension", sources = ["cpp/project/basic.cpp"], include-dirs = ["cpp"], binding = "nanobind"},
+]