build a libtorch extension

[MaxCrazy1101]

import scikit_test
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: libtorch.so: cannot open shared object file: No such file or directory

[build-system]
requires = ["scikit-build-core>=0.10", "pybind11"]
build-backend = "scikit_build_core.build"


[project]
name = "scikit_test"
version = "0.1.0"
description = "A minimal example package (with pybind11)"
readme = "README.md"
authors = [
    { name = "me", email = "[email protected]" },
]
requires-python = ">=3.9"
classifiers = [
    "Development Status :: 4 - Beta",
    "License :: OSI Approved :: MIT License",
    "Programming Language :: Python :: 3 :: Only",
    "Programming Language :: Python :: 3.7",
    "Programming Language :: Python :: 3.8",
    "Programming Language :: Python :: 3.9",
    "Programming Language :: Python :: 3.10",
    "Programming Language :: Python :: 3.11",
    "Programming Language :: Python :: 3.12",
    "Programming Language :: Python :: 3.13",
]

[project.optional-dependencies]
test = ["pytest"]


[tool.scikit-build]
wheel.expand-macos-universal-tags = true
minimum-version = "build-system.requires"


[tool.pytest.ini_options]
minversion = "8.0"
addopts = ["-ra", "--showlocals", "--strict-markers", "--strict-config"]
xfail_strict = true
log_cli_level = "INFO"
filterwarnings = [
    "error",
    "ignore::pytest.PytestCacheWarning",
]
testpaths = ["tests"]


[tool.cibuildwheel]
build-frontend = "build[uv]"
test-command = "pytest {project}/tests"
test-extras = ["test"]

[tool.cibuildwheel.pyodide]
build-frontend = { name = "build", args = ["--exports", "whole_archive"] }

[tool.ruff.lint]
extend-select = [
    "B", # flake8-bugbear
    "I", # isort
    "ARG", # flake8-unused-arguments
    "C4", # flake8-comprehensions
    "EM", # flake8-errmsg
    "ICN", # flake8-import-conventions
    "G", # flake8-logging-format
    "PGH", # pygrep-hooks
    "PIE", # flake8-pie
    "PL", # pylint
    "PT", # flake8-pytest-style
    "PTH", # flake8-use-pathlib
    "RET", # flake8-return
    "RUF", # Ruff-specific
    "SIM", # flake8-simplify
    "T20", # flake8-print
    "UP", # pyupgrade
    "YTT", # flake8-2020
    "EXE", # flake8-executable
    "NPY", # NumPy specific rules
    "PD", # pandas-vet
]
ignore = [
    "PLR09", # Too many X
    "PLR2004", # Magic comparison
]
isort.required-imports = ["from __future__ import annotations"]

[tool.ruff.lint.per-file-ignores]
"tests/**" = ["T20"]

# Require CMake 3.15+ (matching scikit-build-core) Use new versions of all
# policies up to CMake 3.27
cmake_minimum_required(VERSION 3.15...3.27)

# Scikit-build-core sets these values for you, or you can just hard-code the
# name and version.
project(${SKBUILD_PROJECT_NAME}
        VERSION ${SKBUILD_PROJECT_VERSION}
        LANGUAGES CXX)

set(PYBIND11_NEWPYTHON ON)
add_subdirectory("extern/pybind11")

# find libtorch
find_package(Torch REQUIRED)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TORCH_CXX_FLAGS}")

file(GLOB SOURCE ${CMAKE_SOURCE_DIR}/src/*.cpp)
set(INCLUDE_DIR "${CMAKE_SOURCE_DIR}/include")
include_directories(${INCLUDE_DIR})

pybind11_add_module(${PROJECT_NAME} ${SOURCE})
target_link_libraries(${PROJECT_NAME} PRIVATE ${TORCH_LIBRARIES})

# This is passing in the version as a define just as an example
target_compile_definitions(${PROJECT_NAME} PRIVATE VERSION_INFO=${PROJECT_VERSION})

# The install directory is the output (wheel) directory
install(TARGETS ${PROJECT_NAME} DESTINATION .)