misc: update setup.py to our newest standards

setup.py

@@ -1,18 +1,36 @@
 #! /usr/bin/env python
 
 from setuptools import setup, find_packages
+from distutils.command.sdist import sdist
 import os
 import subprocess
 
-VERSION = '0.1'
+class eo_sdist(sdist):
+    def run(self):
+        if os.path.exists('VERSION'):
+            os.remove('VERSION')
+        version = get_version()
+        version_file = open('VERSION', 'w')
+        version_file.write(version)
+        version_file.close()
+        sdist.run(self)
+        if os.path.exists('VERSION'):
+            os.remove('VERSION')
 
 def get_version():
+    if os.path.exists('VERSION'):
+        version_file = open('VERSION', 'r')
+        version = version_file.read()
+        version_file.close()
+        return version
     if os.path.exists('.git'):
-        p = subprocess.Popen(['git','describe','--dirty'], stdout=subprocess.PIPE)
+        p = subprocess.Popen(['git', 'describe', '--dirty', '--match=v*'], stdout=subprocess.PIPE)
         result = p.communicate()[0]
-        if result:
-            return result.split()[0].replace('-','.')
-    return VERSION
+        if p.returncode == 0:
+            version = result.split()[0][1:]
+            version = version.replace('-', '.')
+            return version
+    return '0'
 
 setup(name='scrutiny',
         version=get_version(),
@@ -27,4 +45,7 @@ setup(name='scrutiny',
             'django >= 1.7, < 1.8',
             'gadjo',
         ],
+        cmdclass={
+            'sdist': eo_sdist,
+        },
 )