Changed setup.py to pull version info from git.

Change-Id: Ifdbdd6b587f5e4d0c255d4ed683bc81aeb8d95e4

README

@@ -12,9 +12,9 @@ component.
 Quick Start
 -----------
 
-If you'd like to run trunk, you can fetch from the bzr repo::
+If you'd like to run trunk, you can clone the git repo:
 
-    bzr branch lp:glance
+    git clone git@github.com:openstack/glance.git
 
 
 Install Glance by running::

setup.py

@@ -23,12 +23,28 @@ from setuptools.command.sdist import sdist
 from glance import version
 
 
-if os.path.isdir('.bzr'):
-    with open("glance/vcsversion.py", 'w') as version_file:
-        vcs_cmd = subprocess.Popen(["bzr", "version-info", "--python"],
+def run_git_command(cmd):
+    output = subprocess.Popen(["/bin/sh", "-c", cmd],
                               stdout=subprocess.PIPE)
-        vcsversion = vcs_cmd.communicate()[0]
-        version_file.write(vcsversion)
+    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("glance/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))
 
 
 class local_sdist(sdist):