Base version.py on glance.

This makes setting and calculating the versioning of quantum more
like other OpenStack projects, simplifying the work of the CI
and Release Management teams.

Addresses bug 916018 which prevents the quantum-tarball job from
running correctly.

Change-Id: I5b006ccc3d31c5d213c703853dfa38f04d983918

.gitignore

@@ -7,3 +7,4 @@ run_tests.log
 tests/
 .quantum-venv/
 .venv/
+quantum/vcsversion.py

setup.py

@@ -6,11 +6,37 @@ except ImportError:
     from setuptools import setup, find_packages
 
 import sys
-import version
+import os
+import subprocess
+from quantum import version
+
+
+def run_git_command(cmd):
+    output = subprocess.Popen(["/bin/sh", "-c", cmd],
+                              stdout=subprocess.PIPE)
+    return output.communicate()[0].strip()
+
+
+if os.path.isdir('.git'):
+    branch_nick_cmd = 'git branch | grep -Ei "\* (.*)" | cut -f2 -d" "'
+    branch_nick = run_git_command(branch_nick_cmd)
+    revid_cmd = "git --no-pager log --max-count=1 | cut -f2 -d' ' | head -1"
+    revid = run_git_command(revid_cmd)
+    revno_cmd = "git --no-pager log --oneline | wc -l"
+    revno = run_git_command(revno_cmd)
+    with open("quantum/vcsversion.py", 'w') as version_file:
+        version_file.write("""
+# This file is automatically generated by setup.py, So don't edit it. :)
+version_info = {
+    'branch_nick': '%s',
+    'revision_id': '%s',
+    'revno': %s
+}
+""" % (branch_nick, revid, revno))
 
 Name = 'quantum'
 Url = "https://launchpad.net/quantum"
-Version = version.get_git_version()
+Version = version.canonical_version_string()
 License = 'Apache License 2.0'
 Author = 'Netstack'
 AuthorEmail = 'netstack@lists.launchpad.net'