code: def rebuild(mode=''):
      
      scan_site()  # for good measure
      if not current_user.can_rebuild_site:
          return error('You are not permitted to rebuild the site.</p>'
                       '<p class="lead">Contact an administartor for '
                       'more information.', 401)
      if db is not None:
          db.set('site:needs_rebuild', '-1')
          if not q.fetch_job('build') and not q.fetch_job('orphans'):
              b = q.enqueue_call(func=coil.tasks.build,
                                 args=(app.config['REDIS_URL'],
                                       app.config['NIKOLA_ROOT'], mode),
                                 job_id='build')
              q.enqueue_call(func=coil.tasks.orphans,
                             args=(app.config['REDIS_URL'],
                                   app.config['NIKOLA_ROOT']), job_id='orphans',
                             depends_on=b)
          return render('coil_rebuild.tmpl', {'title': 'Rebuild'})
      else:
          status, outputb = coil.tasks.build_single(mode)
          _, outputo = coil.tasks.orphans_single()
          site.coil_needs_rebuild = '0'
          return render('coil_rebuild_single.tmpl',
                        {'title': 'Rebuild', 'status': '1' if status else '0',
                         'outputb': outputb, 'outputo': outputo})
docs: Rebuild the site with a nice UI.