Example Capistrano deploy file. This is a basic example that I plan to improve soon. Update 1: Added :admin_runner option to ensure deployment directories are created with the correct owner. Update 2: Added better support for multiple environments and added rails:console rails:dbconsole tasks.

deploy.rb

require 'rvm/capistrano'
require 'bundler/capistrano'
require 'capistrano/ext/multistage'
load 'deploy/assets'

set :stages, ["staging", "production"]
set :default_stage, "production"

set :user, '?'
set :admin_runner, '?'
set :application, '?'

set :scm, 'git'
set :repository, "git@bitbucket.org:?/?.git"
set :git_enable_submodules, 1 # if you have vendored rails
set :branch, 'master'
set :git_shallow_clone, 1
set :scm_verbose, true

# additional settings
default_run_options[:pty] = true # Forgo errors when deploying from windows

namespace :db do
  task :setup do
    run "cd #{deploy_to}/current && #{rake} db:setup RAILS_ENV=#{rails_env}"
  end
end

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

namespace :rails do
  desc "Remote console"
  task :console, :roles => :app do
    run_interactively "bundle exec rails console #{rails_env}"
  end

  desc "Remote dbconsole"
  task :dbconsole, :roles => :app do
    run_interactively "bundle exec rails dbconsole #{rails_env}"
  end
end

def run_interactively(command, server=nil)
  server ||= find_servers_for_task(current_task).first
  exec "ssh -l #{user} #{server.host} -t 'source ~/.bash_profile && cd #{deploy_to}/current && #{command}'"
end

production.rb

set :rvm_type, :user
set :rvm_ruby_string, '1.9.3-p362'

# server details
server '?', :app, :web, :db, :primary => true

# deploy config
set :deploy_to, "/var/www/?"
set :deploy_via, :export

set :rails_env, 'production'