当我尝试使用 Moonshine 将我的 rails 应用程序部署到 Rackspace 时，我收到以下错误：
* 2013-01-20 22:54:44 executing `app:symlinks:update'
* 2013-01-20 22:54:44 executing `deploy:create_symlink'
triggering before callbacks for `deploy:create_symlink'
* 2013-01-20 22:54:44 executing `moonshine:apply'
* executing "sudo -p 'sudo password: ' RAILS_ROOT=/srv/appname/releases/20130121065443 DEPLOY_STAGE= RAILS_ENV=production shadow_puppet /srv/appname/releases/20130121065443/app/manifests/application_manifest.rb"
servers: ["appname.com"]
[appname.com] executing command
** [out :: appname.com] Uncaught exception: LoadError: cannot load such file -- /srv/appname/releases/20130121065443/app/manifests/application_manifest.rb
** [out :: appname.com]
** [out :: appname.com]
** [out :: appname.com] /usr/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
** [out :: appname.com]
** [out :: appname.com]
** [out :: appname.com] /usr/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
** [out :: appname.com]
** [out :: appname.com]
** [out :: appname.com] /usr/lib/ruby/gems/1.9.1/gems/shadow_puppet-0.6.2/bin/shadow_puppet:130:in `<top (required)>'
** [out :: appname.com]
** [out :: appname.com]
** [out :: appname.com] /usr/bin/shadow_puppet:19:in `load'
** [out :: appname.com]
** [out :: appname.com]
** [out :: appname.com] /usr/bin/shadow_puppet:19:in `<main>'
** [out :: appname.com]
command finished in 2569ms
*** [deploy:update_code] rolling back
* executing "rm -rf /srv/appname/releases/20130121065443; true"
servers: ["appname.com"]
[appname.com] executing command
command finished in 364ms
failed: "sh -c 'sudo -p '\\''sudo password: '\\'' RAILS_ROOT=/srv/appname/releases/20130121065443 DEPLOY_STAGE= RAILS_ENV=production shadow_puppet /srv/appname/releases/20130121065443/app/manifests/application_manifest.rb'" on appname.com
我应该如何解决这个问题？如果您不知道如何修复它，还有哪些其他的宝石可以帮助我将我的应用程序部署到 Rackspace。