code: def mkvirtualenv():
      
      root = '/'.join([deployment_root(),'env'])
      path = '/'.join([root,env.project_fullname])
      dirs_created = []
      if env.verbosity:
          print env.host,'CREATING VIRTUALENV', path
      if not exists(root): dirs_created += mkdirs(root)
      with cd(root):
          run(' '.join(["virtualenv",env.project_fullname]))
      with cd(path):
          dirs_created += mkdirs('egg_cache')
          sudo('chown -R %s:www-data egg_cache'% env.user)
          sudo('chmod -R g+w egg_cache')
          run(''.join(["echo 'cd ",path,'/','project','/',env.project_package_name,'/sitesettings',"' > bin/postactivate"]))
          sudo('chmod ugo+rwx bin/postactivate')
  
      #Create a state
      out = State(' '.join([env.host,'virtualenv',path,'created']))
      out.object = dirs_created + ['bin','lib','include']
      out.failed = False
      return out
docs: Create the virtualenv project environment