Capfile used for a unicorn-based deployment of a Rails app

Capfile for unicorn deployment

load 'deploy' if respond_to?(:namespace) # cap2 differentiator
Dir['vendor/plugins/*/recipes/*.rb'].each { |plugin| load(plugin) }

load 'config/deploy' # remove this line to skip loading any of the default tasks

namespace :deploy do
  desc "Restart the master unicorn process"
  task :restart do
    run "kill -USR2 `cat #{deploy_to}/shared/pids/unicorn.pid`" 
  end

  desc "Start unicorn server"
  task :start do 
    run "cd #{deploy_to}/current && unicorn_rails -c config/unicorn.config -E production -D" 
  end

  desc "Stop unicorn server"
  task :stop do 
    run "kill -TERM `cat #{deploy_to}/shared/pids/unicorn.pid`" 
  end

  desc "Link in the config *.yml files" 
  task :after_update_code do
    run "ln -nfs #{deploy_to}/#{shared_dir}/config/database.yml #{release_path}/config/" 
    run "ln -nfs #{deploy_to}/#{shared_dir}/config/unicorn.config #{release_path}/config/" 
    run "ln -nfs #{deploy_to}/#{shared_dir}/config/config.local.yml #{release_path}/config/"
  end
end