My Capistrano Deploy.rb

Deploy.rb

set :application, "abc"
set :repository,  "git://github.com/gaagaaga/abcde.git"

set :scm, :git

set :user, 'deploy'
set :use_sudo, false
set :deploy_to, "/home/deploy/rapp/abc"
set :deploy_via, :remote_cache

role :web, "aaaa.bbb.com"                          # Your HTTP server, Apache/etc
role :app, "aaaa.bbb.com"                          # This may be the same as your `Web` server
role :db,  "aaaa.bbb.com", :primary => true # This is where Rails migrations will run

after "deploy", "my_tasks:post_deploy"
default_environment["PATH"] = "/opt/ruby/bin:/usr/bin:/bin:/usr/sbin:/sbin"

namespace :deploy do
  task :start do ; end
  task :stop do ; end
  task :restart, :roles => :app, :except => { :no_release => true } do
    run "touch #{File.join(current_path,'tmp','restart.txt')}"
  end
end

namespace :my_tasks do
  task :post_deploy do 
    run "ln -sf #{shared_path}/config/database.yml #{release_path}/config/database.yml"
    run "ln -sf #{shared_path}/public/photo_store #{release_path}/public/photo_store"
    # run "ln -sf #{shared_path}/vendor/gems #{release_path}/vendor/gems"

    run "cd #{deploy_to}/current && bundle install vendor/gems"
  end
end