http://theadmin.org/articles/capistrano-for-chiliproject/

deploy.rb

require "bundler/capistrano"

set :application, "chiliproject"
set :repository, "git@projects.littlestreamsoftware.app.git"
set :scm, :git
set :git_enable_submodules,1

# fast_remote_cache is better but requires a plugin
set :deploy_via, :remote_cache
# set :deploy_via, :fast_remote_cache

# =============================================================================
# OPTIONAL VARIABLES
# =============================================================================
set :deploy_to, "/home/websites/projects.littlestreamsoftware.com" # defaults to "/u/apps/#{application}"
set :user, "edavis"            # defaults to the currently logged in user
set :use_sudo, false

# =============================================================================
# SSH OPTIONS
# =============================================================================
ssh_options[:forward_agent] = true

default_run_options[:pty] = true

# Is sent to bundler so only production and postgres bundles are created
set :bundle_without, [:development, :test, :rmagick, :mysql, :mysql2, :sqlite]

namespace :deploy do
  desc "Restarting mod_rails with restart.txt"
  task :restart, :roles => :app, :except => { :no_release => true } do
    run "touch #{current_path}/tmp/restart.txt"
  end

  [:start, :stop].each do |t|
    desc "#{t} task is a no-op with mod_rails"
    task t, :roles => :app do ; end
  end

  desc "Migrate the plugins"
  task :migrate_plugins, :roles => [:app] do
    run "cd #{current_path} && rake RAILS_ENV=production  db:migrate_plugins"
  end
end
  
namespace :localize do
  desc "copy shared configurations to current"
  task :copy_shared_configurations, :roles => [:app] do
    %w[database.yml configuration.yml additional_environment.rb].each do |f|
      run "ln -nsf #{shared_path}/config/#{f} #{current_path}/config/#{f}"
    end
  end

  desc "link shared file storage to current"
  task :link_shared_file_storage, :roles => [:app] do
    run "ln -nsf #{shared_path}/files/ #{current_path}/files"
  end

  desc "link session store configuration"
  task :link_session_store, :roles => [:app] do
    run "ln -nsf #{shared_path}/config/session_store.rb #{current_path}/config/initializers/session_store.rb"
  end
end

after "deploy:symlink", "localize:copy_shared_configurations", "localize:link_shared_file_storage", "localize:link_session_store", "deploy:cleanup"