build native sources when calling pip install (#223)

setup.py

@@ -1,4 +1,62 @@
-from setuptools import setup
+import os
+import subprocess
+from setuptools import setup, Extension
+from setuptools.command.build_ext import build_ext
+
+cwd = os.getcwd()
+WINDOWS = (os.name == 'nt')
+
+buildFolder = "build"
+nativeSources = os.path.join(cwd, "pythonfmu", "pythonfmu-export")
+
+
+class CMakeExtension(Extension):
+
+    def __init__(self, name):
+        super().__init__(name, sources=[])
+
+
+class CMakeBuild(build_ext):
+
+    def run(self):
+        for ext in self.extensions:
+            self.build_extension(ext)
+        super().run()
+
+    def build_extension(self, ext):
+        os.chdir(nativeSources)
+        if not os.path.exists(buildFolder):
+            os.mkdir(buildFolder)
+        build_type = 'Release'
+        # configure
+        cmake_args = [
+            'cmake',
+            '.',
+            '-B',
+            buildFolder,
+            '-DCMAKE_BUILD_TYPE={}'.format(build_type),
+        ]
+        if WINDOWS:
+            cmake_args.extend(['-A', 'x64'])
+
+        subprocess.check_call(cmake_args)
+        cmake_args_build = [
+            'cmake',
+            '--build',
+            buildFolder
+        ]
+        if WINDOWS:
+            cmake_args_build.extend(['--config', 'Release'])
+        subprocess.check_call(cmake_args_build)
+        os.chdir(cwd)
+
+
+def binary_suffix():
+    return ".exe" if WINDOWS else ""
+
 
 # See setup.cfg for Python package parameters
-setup()
+setup(
+    ext_modules=[CMakeExtension('.')],
+    cmdclass=dict(build_ext=CMakeBuild)
+)