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import platform

import sys

from glob import glob

from pathlib import Path

import pybind11

from setuptools import Extension, find_packages, setup

from setuptools.command.build_clib import build_clib

from setuptools.command.build_ext import build_ext

PACKAGE_NAME = "ratapi"

with open("README.md") as f:

LONG_DESCRIPTION = f.read()

libevent = ("eventManager", {"sources": ["cpp/RAT/events/eventManager.cpp"], "include_dirs": ["cpp/RAT/events/"]})

ext_modules = [

Extension(

"ratapi.rat_core",

sources=["cpp/rat.cpp", *glob("cpp/RAT/*.c*")],

include_dirs=[

# Path to pybind11 headers

pybind11.get_include(),

pybind11.get_include(True),

"cpp/RAT/",

"cpp/includes/",

language="c++",

]

# check whether compiler supports a flag

def has_flag(compiler, flagname):

import tempfile

from setuptools.errors import CompileError

with tempfile.NamedTemporaryFile("w", suffix=".cpp") as f:

f.write("int main (int argc, char **argv) { return 0; }")

try:

compiler.compile([f.name], extra_postargs=[flagname])

except CompileError:

return False

return True

def get_shared_object_name(lib_name):

if platform.system() == "Windows":

return f"{lib_name}.dll"

elif platform.system() == "Darwin":

return f"{lib_name}.dylib"

else:

return f"{lib_name}.so"

class BuildExt(build_ext):

"""A custom build extension for adding compiler-specific options."""

c_opts = {

"msvc": ["/O2", "/EHsc", "/openmp"],

"unix": ["-O2", "-fopenmp", "-std=c++11"],

}

l_opts = {

"msvc": [],

"unix": ["-fopenmp"],

}

if sys.platform == "darwin":

darwin_opts = ["-stdlib=libc++", "-mmacosx-version-min=10.9"]

c_opts["unix"] = [*darwin_opts, "-fopenmp", "-O2"]

l_opts["unix"] = [*darwin_opts, "-lomp"]

def build_extensions(self):

ct = self.compiler.compiler_type

opts = self.c_opts.get(ct, [])

link_opts = self.l_opts.get(ct, [])

if ct == "unix":

if "-Wstrict-prototypes" in self.compiler.compiler_so:

self.compiler.compiler_so.remove("-Wstrict-prototypes")

opts.append(f'-DVERSION_INFO="{self.distribution.get_version()}"')

if has_flag(self.compiler, "-fvisibility=hidden"):

opts.append("-fvisibility=hidden")

elif ct == "msvc":

opts.append(f'/DVERSION_INFO=\\"{self.distribution.get_version()}\\"')

for ext in self.extensions:

ext.extra_compile_args = opts

ext.extra_link_args = link_opts

build_ext.build_extensions(self)

def run(self):

super().run()

build_py = self.get_finalized_command("build_py")

package_dir = f"{build_py.build_lib}/{PACKAGE_NAME}/"

for p in Path(package_dir).glob("**/*"):

if p.suffix in {".exp", ".a", ".lib"}:

p.unlink()

if self.inplace:

obj_name = get_shared_object_name(libevent[0])

src = f"{build_py.build_lib}/{PACKAGE_NAME}/{obj_name}"

dest = f"{build_py.get_package_dir(PACKAGE_NAME)}/{obj_name}"

build_py.copy_file(src, dest)

class BuildClib(build_clib):

def initialize_options(self):

super().initialize_options()

build_py = self.get_finalized_command("build_py")

self.build_clib = f"{build_py.build_lib}/{PACKAGE_NAME}"

def build_libraries(self, libraries):

# bug in distutils: flag not valid for c++

flag = "-Wstrict-prototypes"

if hasattr(self.compiler, "compiler_so") and flag in self.compiler.compiler_so:

self.compiler.compiler_so.remove(flag)

compiler_type = self.compiler.compiler_type

if compiler_type == "msvc":

compile_args = ["/EHsc", "/LD", "-D_DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR"]

else:

compile_args = ["-std=c++11", "-fPIC"]

for lib_name, build_info in libraries:

build_info["cflags"] = compile_args

macros = build_info.get("macros")

include_dirs = build_info.get("include_dirs")

cflags = build_info.get("cflags")

sources = list(build_info.get("sources"))

objects = self.compiler.compile(

sources,

output_dir=self.build_temp,

macros=macros,

include_dirs=include_dirs,

extra_postargs=cflags,

debug=self.debug,

)

language = self.compiler.detect_language(sources)

self.compiler.link_shared_object(

objects,

get_shared_object_name(lib_name),

output_dir=self.build_clib,

target_lang=language,

)

super().build_libraries(libraries)

setup(

name=PACKAGE_NAME,

author="",

author_email="",

url="https://github.com/RascalSoftware/python-RAT",

description="Python extension for the Reflectivity Analysis Toolbox (RAT)",

long_description=LONG_DESCRIPTION,

long_description_content_type="text/markdown",

packages=find_packages(exclude=("tests",)),

include_package_data=True,

package_data={"": [get_shared_object_name(libevent[0])], "ratapi.examples": ["data/*.dat"]},

cmdclass={"build_clib": BuildClib, "build_ext": BuildExt},

libraries=[libevent],

ext_modules=ext_modules,

zip_safe=False,

)

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