Parse version directly from pymemcache/__init__.py

We can no longer import the __version__ attribute because there is no an
implicit runtime dependency on six (as of #197), and we can't guarantee
that six is installed until *after* setup.py is parsed and run.

Instead, parse the `__version__ = 'x.y.z'` string from __init__.py to
extract the version.

Fixes #214

1 files changed, 13 insertions, 4 deletions

diff --git a/setup.py b/setup.py
index 7984cc9..fa8174d 100644
--- a/setup.py
+++ b/setup.py
@@ -1,20 +1,29 @@
 #!/usr/bin/env python
+
 import os
+import re
 
 from setuptools import setup, find_packages
-from pymemcache import __version__
 
 
-def read(fname):
-    return open(os.path.join(os.path.dirname(__file__), fname)).read()
+def read(path):
+    return open(os.path.join(os.path.dirname(__file__), path)).read()
+
+
+def read_version(path):
+    match = re.search(r"^__version__ = ['\"]([^'\"]*)['\"]", read(path), re.M)
+    if match:
+        return match.group(1)
+    raise RuntimeError("Unable to find __version__ in %s." % path)
 
 
 readme = read('README.rst')
 changelog = read('ChangeLog.rst')
+version = read_version('pymemcache/__init__.py')
 
 setup(
     name='pymemcache',
-    version=__version__,
+    version=version,
     author='Charles Gordon',
     author_email='charles@pinterest.com',
     packages=find_packages(),