get version from git

setup.py

@@ -9,9 +9,17 @@ except:
 def get_bzr_version():
     import os
     import re
+    import subprocess
+    dot_git = os.path.join(os.path.dirname(__file__), '.git')
     info = os.path.join(os.path.dirname(__file__), '.bzr/branch/last-revision')
     changelog = os.path.join(os.path.dirname(__file__), 'debian/changelog')
-    if os.path.exists(info):
+    if os.path.exists(dot_git):
+        cmd = ['git', 'rev-list', 'HEAD', '--count']
+        p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        stdout, stderr = p.communicate()
+        rev = int(stdout)
+        return u'%s' % rev
+    elif os.path.exists(info):
         f = open(info)
         rev = int(f.read().split()[0])
         f.close()