Django wsgi patch. Every time it starts updates two files. changeset.txt with the current mercurial changeset, wsgistart_info.txt with the host and date of start

wsgi.py

import os
import sys

reload(sys)
sys.setdefaultencoding("utf-8")
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "crowddeals.settings")

def touch_wsgistart_info():
    from mercurial import hg, ui
    import time
    import socket

    root = os.path.abspath(os.path.dirname(__file__))
    repo_path = os.path.join(root, '..')
    repo = hg.repository(ui=ui.ui(), path=repo_path)
    ctx = repo[None]

    with file(os.path.join(root, 'templates/changeset.txt'), 'w') as f:
        f.write('rev. %(num)s:%(rev)s%(changed)s (%(branch)s)' % {
            'num': ctx.p1().rev(),
            'rev': ctx.parents()[0],
            'changed': '+' if ctx.status() else '',
            'branch': ctx.branch()
        })

    with file(os.path.join(root, 'templates/wsgistart_info.txt'), 'w') as f:
        f.write('since %s on %s' % (
            time.asctime(time.localtime()),
            socket.gethostname()
        ))

touch_wsgistart_info()

from django.core.wsgi import get_wsgi_application
application = get_wsgi_application()