setup updated to compliant with eobuilder

setup.py

@@ -1,12 +1,50 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 
-try:
-    from setuptools import setup
-except ImportError:
-    from ez_setup import use_setuptools
-    use_setuptools()
-    from setuptools import setup
+from distutils.command.sdist import sdist
+from setuptools import setup
+
+class eo_sdist(sdist):
+
+    def run(self):
+        print "creating VERSION file"
+        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)
+        print "removing VERSION file"
+        if os.path.exists('VERSION'):
+            os.remove('VERSION')
+
+def get_version():
+
+    version = None
+    for d in glob.glob('*'):
+        if not os.path.isdir(d):
+            continue
+        module_file = os.path.join(d, '__init__.py')
+        if not os.path.exists(module_file):
+            continue
+        for v in re.findall("""__version__ *= *['"](.*)['"]""",
+                open(module_file).read()):
+            assert version is None
+            version = v
+        if version:
+            break
+    assert version is not None
+    if os.path.exists('.git'):
+        import subprocess
+        p = subprocess.Popen(['git','describe','--dirty','--match=v*'],
+                stdout=subprocess.PIPE)
+        result = p.communicate()[0]
+        assert p.returncode == 0, 'git returned non-zero'
+        new_version = result.split()[0][1:]
+        assert new_version.split('-')[0] == version, '__version__ must match the last git annotated tag'
+        version = new_version.replace('-', '.')
+    return version
 
 
 setup(
@@ -30,4 +68,7 @@ setup(
         'Programming Language :: Python :: 2',
     ],
     zip_safe=False,
+    cmdclass={
+        'sdist': eo_sdist
+    },
 )