Capistrano configuration for RVM, bundler, Sinatra and Unicorn

gistfile1.rb

require "bundler/capistrano"
$:.unshift(File.expand_path('./lib', ENV['rvm_path']))
require "rvm/capistrano"

set :rvm_ruby_string, '1.9.2@sinatroxy'
set :rvm_type, :system
set :bundle_flags, "--deployment"

set :application, "sinatroxy"
set :repository,  "xxx@yyy:sinatroxy"
set :rack_env, :production

set :scm, :git

default_run_options[:pty] = true
set :user,            "deployer"
set :group,           "deployer"
set :use_sudo,        false

role :web, "pod-delivery"
role :app, "pod-delivery"
role :db,  "pod-delivery", :primary => true

set :deploy_to, "/var/www/#{application}/"
# set :deploy_via, :remote_cache

set :unicorn_pid, "#{current_path}/tmp/pids/unicorn.pid"

# before "deploy", "deploy:install_bundler"

 
namespace :deploy do
  task :start, :roles => :app, :except => { :no_release => true } do 
    run "cd #{current_path} ; bundle exec unicorn -c #{current_path}/config/unicorn.rb -D -E #{rack_env};"
  end
  task :stop, :roles => :app, :except => { :no_release => true } do 
    run "#{try_sudo} kill `cat #{unicorn_pid}`"
  end
  task :graceful_stop, :roles => :app, :except => { :no_release => true } do
    run "#{try_sudo} kill -s QUIT `cat #{unicorn_pid}`"
  end
  task :reload, :roles => :app, :except => { :no_release => true } do
    run "#{try_sudo} kill -s USR2 `cat #{unicorn_pid}`"
  end
  task :restart, :roles => :app, :except => { :no_release => true } do
    stop
    start
  end
  task :install_bundler do
    run "cd #{current_path} ; gem install bundler"
  end
end