Example capistrano deploy script

gistfile1.txt

set :stages, %w(production)

require 'capistrano/ext/multistage'
require 'bundler/capistrano'
require 'rvm/capistrano'
require './config/boot'

ssh_options[:username] = 'deployer'
ssh_options[:forward_agent] = true

set :application, 'my-app'
set :repository, "git@github.com:Organization/#{application}.git"
set :scm, :git
set(:deploy_to) {"/var/www/#{application}/#{rails_env}"}
set :rvm_type, :user
set :rvm_ruby_string, "2.1.3@#{application}"
set :use_sudo, false

set :shared_symlinks, %w(config/database.yml config/unicorn.rb config/secrets.yml)
set :tasks_for_rake, %w(db:migrate)

before 'deploy:assets:precompile',      'deploy:create_shared_symlinks'
after  'deploy:assets:precompile',      'deploy:db:migrate'
after  'deploy:db:migrate',             'nginx:config'
after  'nginx:config',                  'nginx:reload'
after  'deploy',                        'deploy:cleanup'

namespace :deploy do
  task :start do
    run "cd #{current_path} && bundle exec unicorn -c #{shared_path}/config/unicorn.rb -E #{rails_env} -D"
  end 

  task :stop do
    run "kill `cat #{shared_path}/pids/unicorn.pid`; true"
  end 

  task :restart do
    stop
    start
  end 

  task :create_shared_symlinks, :except => {:no_release => true} do
    run(shared_symlinks.map {|link| "ln -nfs #{shared_path}/#{link} #{release_path}/#{link}"}.join(' && '))
  end 

  namespace :db do
    task :backup, :except => {:no_release => true} do
      run "cd #{current_path} && RAILS_ENV=#{rails_env} bundle exec rake db:backup"
    end 

    task :migrate, :except => {:no_release => true} do
      backup
      run "cd #{release_path} && RAILS_ENV=#{rails_env} bundle exec rake db:migrate"
    end 

    task :seed, :except => {:no_release => true} do
      run "cd #{release_path} && RAILS_ENV=#{rails_env} bundle exec rake db:seed"
    end 
  end 
end

namespace :nginx do
  task :config do
    run "sudo rm -f /etc/nginx/sites-enabled/#{application}_#{rails_env} && sudo ln -nfs #{current_path}/config/nginx_#{rails_env}.conf /etc/nginx/sites-enabled/#{application}_#{rails_env}"
  end 

  task :reload do
    run "sudo /etc/init.d/nginx reload"
  end 
end

require './config/boot'