setup.py: Read __version__ from uvloop/__init__.py

Fixes #137.

Author: 1st1

setup.py

@@ -22,7 +22,6 @@
         raise RuntimeError('uvloop requires Python 3.5 or 3.6b3 or greater')
 
 
-VERSION = '0.9.2.dev0'
 CFLAGS = ['-O2']
 LIBUV_DIR = os.path.join(os.path.dirname(__file__), 'vendor', 'libuv')
 LIBUV_BUILD_DIR = os.path.join(os.path.dirname(__file__), 'build', 'libuv')
@@ -211,6 +210,18 @@ def build_extensions(self):
     readme = f.read()
 
 
+with open(os.path.join(
+        os.path.dirname(__file__), 'uvloop', '__init__.py')) as f:
+    for line in f:
+        if line.startswith('__version__ ='):
+            _, _, version = line.partition('=')
+            VERSION = version.strip(" \n'\"")
+            break
+    else:
+        raise RuntimeError(
+            'unable to read the version from uvloop/__init__.py')
+
+
 setup(
     name='uvloop',
     description='Fast implementation of asyncio event loop on top of libuv',

uvloop/__init__.py

@@ -7,6 +7,7 @@
 from .loop import Loop as __BaseLoop  # NOQA
 
 
+__version__ = '0.9.2.dev0'
 __all__ = ('new_event_loop', 'EventLoopPolicy')