make it possible to install via pip

README.md

@@ -55,7 +55,16 @@ Mozilla Public License Version 2.0.
 - [pytest](http://pytest.org) (to test the optional Python interface)
 
 
-# Building and testing
+# Installation
+
+## Installing via pip
+
+```
+pip install git+https://github.com/dftlibs/numgrid@master
+```
+
+
+## Building and testing from sources
 
 Fetch the code:
 

setup.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+
+from distutils.core import setup
+import distutils.spawn as _spawn
+import distutils.command.build as _build
+import distutils.dir_util as _dir_util
+import setuptools.command.install as _install
+import os
+import sys
+from distutils.sysconfig import get_python_lib
+from shutil import copy2
+
+
+def run_cmake():
+    """
+    Runs CMake to determine configuration for this build.
+    """
+    if _spawn.find_executable('cmake') is None:
+        print("CMake is required to build this package.")
+        print("Please install/load CMake and re-run setup.")
+        sys.exit(-1)
+
+    _build_dir = os.path.join(os.path.split(__file__)[0], 'build_setup_py')
+    _dir_util.mkpath(_build_dir)
+    os.chdir(_build_dir)
+
+    try:
+        _spawn.spawn(['cmake', '..'])
+    except _spawn.DistutilsExecError:
+        print("Error while running CMake")
+        sys.exit(-1)
+
+
+class build(_build.build):
+
+    def run(self):
+        cwd = os.getcwd()
+        run_cmake()
+
+        try:
+            _spawn.spawn(['make'])
+            os.chdir(cwd)
+        except _spawn.DistutilsExecError:
+            print("Error while running Make")
+            sys.exit(-1)
+
+        _build.build.run(self)
+
+
+class install(_install.install):
+    def run(self):
+        cwd = os.getcwd()
+        _install.install.run(self)
+        _target_path = os.path.join(get_python_lib(), 'numgrid')
+
+        if not os.path.exists(_target_path):
+             os.makedirs(_target_path)
+
+        if sys.platform == "darwin":
+            suffix = 'dylib'
+        else:
+            suffix = 'so'
+
+        for f in [os.path.join('build_setup_py', 'lib', 'libnumgrid.{0}'.format(suffix)),
+                  os.path.join('build_setup_py', 'include', 'numgrid_export.h'),
+                  os.path.join('numgrid', 'numgrid.h')]:
+            copy2(os.path.join(cwd, f), _target_path)
+
+
+setup(name='numgrid',
+      version='1.0.0-alpha',
+      description='Numerical integration grid for molecules.',
+      author='Radovan Bast',
+      author_email='radovan.bast@uit.no',
+      url='https://github.com/dftlibs/numgrid',
+      packages=['numgrid'],
+      license='MPL-v2.0',
+      install_requires=['cffi', 'numpy'],
+      cmdclass={'install': install, 'build': build})