adding setup.py for pip install integration

Signed-off-by: Alex McCaskey <mccaskeyaj@ornl.gov>

setup.py

+#! /usr/bin/env python3
+
+import os
+import re
+import sys
+import sysconfig
+import platform
+import subprocess
+import multiprocessing
+
+from distutils.version import LooseVersion
+from setuptools import setup, Extension, find_packages
+from setuptools.command.build_ext import build_ext
+from setuptools.command.install import install as InstallCommandBase
+from setuptools.command.test import test as TestCommand
+from shutil import copyfile, copymode
+import shutil
+
+env = os.environ.copy()
+
+class CMakeExtension(Extension):
+    def __init__(self, name, sourcedir=''):
+        Extension.__init__(self, name, sources=[])
+        self.sourcedir = os.path.abspath(sourcedir)
+
+openssl_root_dir = None
+
+class InstallCommand(InstallCommandBase):
+    user_options = InstallCommandBase.user_options + [
+		    ('openssl-dir=', None, 'Specify OPENSSL_ROOT_DIR')
+		    ]
+
+    def initialize_options(self):
+        InstallCommandBase.initialize_options(self)
+        self.openssl_dir = '/usr/local/opt/openssl' if platform.system() == 'Darwin' else '/usr/lib64'
+
+    def finalize_options(self):
+        global openssl_root_dir
+        print('openssl ', self.openssl_dir)
+        openssl_root_dir = self.openssl_dir
+        InstallCommandBase.finalize_options(self)
+
+    def run(self):
+        global install_directory
+        InstallCommandBase.run(self)
+        self.do_egg_install()
+        subdirs = [name for name in os.listdir(self.install_lib)
+			            if os.path.isdir(os.path.join(self.install_lib, name)) 
+				    and 'xacc-0.1.0' in name and 'egg-info' not in name]
+        copyfile(env['HOME']+'/.xacc/lib/python/pyxacc.so', self.install_lib+subdirs[0]+'/pyxacc.so')
+
+class CMakeBuild(build_ext):
+    def run(self):
+        try:
+            out = subprocess.check_output(['cmake', '--version'])
+        except OSError:
+            raise RuntimeError(
+                "CMake must be installed to build the following extensions: " +
+                ", ".join(e.name for e in self.extensions))
+
+        if platform.system() == "Windows":
+            cmake_version = LooseVersion(re.search(r'version\s*([\d.]+)',
+                                         out.decode()).group(1))
+            if cmake_version < '3.1.0':
+                raise RuntimeError("CMake >= 3.1.0 is required on Windows")
+
+        for ext in self.extensions:
+            self.build_extension(ext)
+
+    def build_extension(self, ext):
+        extdir = os.path.abspath(
+            os.path.dirname(self.get_ext_fullpath(ext.name)))
+
+        cmake_args = ['-DPYTHON_EXECUTABLE=' + sys.executable, 
+			'-DOPENSSL_ROOT_DIR='+openssl_root_dir,
+			'-DCMAKE_INSTALL_PREFIX='+env['HOME']+'/.xacc']
+
+        cfg = 'Debug' if self.debug else 'Release'
+        build_args = ['--config', cfg]
+
+        if platform.system() == "Windows":
+            cmake_args += ['-DCMAKE_LIBRARY_OUTPUT_DIRECTORY_{}={}'.format(
+                cfg.upper(),
+                extdir)]
+            if sys.maxsize > 2**32:
+                cmake_args += ['-A', 'x64']
+            build_args += ['--', '/m']
+        else:
+            cmake_args += ['-DCMAKE_BUILD_TYPE=' + cfg]
+            build_args += ['--', '-j'+str(multiprocessing.cpu_count())]
+
+        env['CXXFLAGS'] = '{} -DVERSION_INFO=\\"{}\\"'.format(
+            env.get('CXXFLAGS', ''),
+            self.distribution.get_version())
+        if not os.path.exists(self.build_temp):
+            os.makedirs(self.build_temp)
+        subprocess.check_call(['cmake', ext.sourcedir] + cmake_args,
+                              cwd=self.build_temp, env=env)
+        subprocess.check_call(['cmake', '--build', '.'] + build_args,
+                              cwd=self.build_temp)
+        print() # Add an empty line for cleaner output
+
+s = setup(
+    name='xacc',
+    version='0.1.0',
+    author='Alex McCaskey',
+    author_email='xacc-dev@eclipse.org',
+    description='Hardware-agnostic quantum programming framework',
+    long_description='XACC provides a language and hardware agnostic programming framework for hybrid classical-quantum applications.',
+    scripts=['tools/plugins/xacc-install-plugins.py'],
+    ext_modules=[CMakeExtension('.')],
+    cmdclass={'build_ext':CMakeBuild, 'install':InstallCommand},
+    zip_safe=False
+)