setup.py: get rid of most GLOBAL_CONSTANTS

setup.py

 #!/usr/bin/env python
 
-# Copyright 2012-2015 Tinyarray authors.
+# Copyright 2012-2016 Tinyarray authors.
 #
 # This file is part of Tinyarray.  It is subject to the license terms in the
 # file LICENSE.rst found in the top-level directory of this distribution and
@@ -32,24 +32,8 @@ except ImportError:
         return _getfinalpathname(f1) == _getfinalpathname(f2)
 
 
-README_FILE = 'README.rst'
 SAVED_VERSION_FILE = 'version'
-VERSION_HEADER = ['src', 'version.hh']
-
-CLASSIFIERS = """\
-Development Status :: 5 - Production/Stable
-Intended Audience :: Science/Research
-Intended Audience :: Developers
-License :: OSI Approved :: BSD License
-Programming Language :: Python :: 2
-Programming Language :: Python :: 3
-Programming Language :: C++
-Topic :: Software Development
-Topic :: Scientific/Engineering
-Operating System :: POSIX
-Operating System :: Unix
-Operating System :: MacOS
-Operating System :: Microsoft :: Windows"""
+
 
 distr_root = os.path.dirname(os.path.abspath(__file__))
 
@@ -126,7 +110,7 @@ def long_description():
     text = []
     skip = True
     try:
-        with open(README_FILE) as f:
+        with open('README.rst') as f:
             for line in f:
                 if line == "\n":
                     if skip:
@@ -145,7 +129,7 @@ def long_description():
 
 class our_build_ext(build_ext):
     def run(self):
-        with open(os.path.join(*VERSION_HEADER), 'w') as f:
+        with open(os.path.join('src', 'version.hh'), 'w') as f:
             f.write("// This file has been generated by setup.py.\n")
             f.write("// It is not included in source distributions.\n")
             f.write('#define VERSION "{}"\n'.format(version))
@@ -168,15 +152,29 @@ class our_sdist(sdist):
                     .format(version))
 
 
-module = Extension('tinyarray',
-                   language='c++',
-                   sources=['src/arithmetic.cc', 'src/array.cc',
-                            'src/functions.cc'],
-                   depends=['src/arithmetic.hh', 'src/array.hh',
-                            'src/conversion.hh', 'src/functions.hh'])
-
-
 def main():
+    exts = [Extension('tinyarray',
+                      language='c++',
+                      sources=['src/arithmetic.cc', 'src/array.cc',
+                               'src/functions.cc'],
+                      depends=['src/arithmetic.hh', 'src/array.hh',
+                               'src/conversion.hh', 'src/functions.hh'])]
+
+    classifiers = """\
+    Development Status :: 5 - Production/Stable
+    Intended Audience :: Science/Research
+    Intended Audience :: Developers
+    License :: OSI Approved :: BSD License
+    Programming Language :: Python :: 2
+    Programming Language :: Python :: 3
+    Programming Language :: C++
+    Topic :: Software Development
+    Topic :: Scientific/Engineering
+    Operating System :: POSIX
+    Operating System :: Unix
+    Operating System :: MacOS
+    Operating System :: Microsoft :: Windows"""
+
     setup(name='tinyarray',
           version=version,
           author='Christoph Groth (CEA) and others',
@@ -187,10 +185,10 @@ def main():
           download_url="http://downloads.kwant-project.org/tinyarray/",
           license="Simplified BSD license",
           platforms=["Unix", "Linux", "Mac OS-X", "Windows"],
-          classifiers=CLASSIFIERS.split('\n'),
+          classifiers=classifiers.split('\n'),
           cmdclass={'build_ext': our_build_ext,
                     'sdist': our_sdist},
-          ext_modules=[module],
+          ext_modules=exts,
           test_suite = 'nose.collector',
           tests_require=['nose >= 1.0'])