Fix setup.py (#67)

* find __version__ without importing the module

If we import the module, the dependencies are not yet installed and
setup fails

* use a single `__version__.py` file instead

emu/__init__.py

@@ -1,3 +1 @@
 from .wsgi import application
-
-__version__ = '0.9.0'

emu/__version__.py

@@ -0,0 +1 @@
+__version__ = '0.9.0'

setup.cfg

@@ -6,7 +6,7 @@ tag = True
 [metadata]
 description-file = README.rst
 
-[bumpversion:file:emu/__init__.py]
+[bumpversion:file:emu/__version__.py]
 search = __version__ = '{current_version}'
 replace = __version__ = '{new_version}'
 

setup.py

@@ -1,15 +1,20 @@
+import re
 import os
 
 from setuptools import setup, find_packages
 
-version = __import__('emu').__version__
 here = os.path.abspath(os.path.dirname(__file__))
 README = open(os.path.join(here, 'README.rst')).read()
 CHANGES = open(os.path.join(here, 'CHANGES.rst')).read()
 
 reqs = [line.strip() for line in open('requirements.txt')]
 extra_reqs = [line.strip() for line in open('requirements_dev.txt')]
 
+# copied from `requests`
+about = {}
+with open(os.path.join(here, 'emu', '__version__.py'), 'r') as f:
+    exec(f.read(), about)
+
 classifiers = [
     'Development Status :: 4 - Beta',
     'Intended Audience :: Science/Research',
@@ -20,7 +25,7 @@
 ]
 
 setup(name='emu',
-      version=version,
+      version=about['__version__'],
       description='WPS processes for testing and demo',
       long_description=README + '\n\n' + CHANGES,
       classifiers=classifiers,