アプリを Amazon EC2 マシンにデプロイする Capistrano スクリプトがあります。アセットのコンパイル時に失敗しています:
* executing "cd -- /home/ec2-user/uc_social_server/releases/20130731161645 && RAILS_ENV=production RAILS_GROUPS=assets rake assets:precompile"
servers: ["ec2-23-22-188-11.compute-1.amazonaws.com"]
[ec2-23-22-188-11.compute-1.amazonaws.com] executing command
** [out :: ec2-23-22-188-11.compute-1.amazonaws.com] Could not find thread_safe-0.1.0 in any of the sources
** [out :: ec2-23-22-188-11.compute-1.amazonaws.com]
** [out :: ec2-23-22-188-11.compute-1.amazonaws.com] Run `bundle install` to install missing gems.
** [out :: ec2-23-22-188-11.compute-1.amazonaws.com]
command finished in 591ms
*** [deploy:update_code] rolling back
* executing "rm -rf /home/ec2-user/uc_social_server/releases/20130731161645; true"
servers: ["ec2-23-22-188-11.compute-1.amazonaws.com"]
[ec2-23-22-188-11.compute-1.amazonaws.com] executing command
command finished in 201ms
failed: "sh -c 'cd -- /home/ec2-user/uc_social_server/releases/20130731161645 && RAILS_ENV=production RAILS_GROUPS=assets rake assets:precompile'" on ec2-23-22-188-11.compute-1.amazonaws.com