staging.rb

require 'capistrano/ext/multistage'
require "rvm/capistrano"
require "bundler/capistrano"
require "delayed/recipes"
require 'new_relic/recipes'

set :rvm_ruby_string, ENV['GEM_HOME'].gsub(/.*\//,"") # Read from local system

set :default_environment, {
  'PATH' => "/home/rails/.rvm/gems/ruby-1.8.7-p370@appname/bin:/home/rails/.rvm/bin:/home/rails/.rvm/rubies/ruby-1.8.7-p370/bin:$PATH",
  'GEM_HOME'     => '/home/rails/.rvm/gems/ruby-1.8.7-p370@appname',
  'GEM_PATH'     => '/home/rails/.rvm/gems/ruby-1.8.7-p370@appname:/home/rails/.rvm/gems/ruby-1.8.7-p370@global',
  'BUNDLE_PATH'  => '/home/rails/.rvm/gems/ruby-1.8.7-p370@appname'  # If you are using bundler.
}

set :application, "example.com"
set :domain, "example.com"
set :repository,  "git@github.com:user/app.git"
set :rails_env, "staging"

# If you aren't deploying to /u/apps/#{application} on the target
# servers (which is the default), you can specify the actual location
# via the :deploy_to variable:

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

set :deploy_via,  :remote_cache
set :user, "rails"

set :use_sudo, false

# If you aren't using Subversion to manage your source code, specify
# your SCM below:
set :scm, :git
# Deploy the current branch that is checked out.
set :branch,      $1 if `git branch` =~ /\* (\S+)\s/m

role :app, domain
role :web, domain
role :worker, domain
role :db,  domain, :primary => true

set :delayed_job_server_role, :worker

namespace :rvm do
  task :trust_rvmrc do
    run "rvm rvmrc trust #{release_path}"
  end
end

namespace :deploy do

  after "deploy",         "rvm:trust_rvmrc"
  after "deploy:stop",    "delayed_job:stop"
  after "deploy:start",   "delayed_job:start"
  after "deploy:restart", "delayed_job:restart"

  # Passenger
  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

  # after 'deploy:update_code', 'deploy:symlink_all'
  after "deploy:update", "newrelic:notice_deployment"
  after "bundle:install", "deploy:symlink_all"

  desc "Symlinks the database.yml"
  task :symlink_all, :roles => :app do

    puts "* Symlinking database.yml"
    run "ln -nfs #{deploy_to}/shared/config/database.yml #{release_path}/config/database.yml"
    run "ln -nfs #{deploy_to}/shared/config/connectware.yml #{release_path}/config/connectware.yml"
  end

  namespace :assets do
    task :precompile, :roles => :web, :except => { :no_release => true } do
      from = source.next_revision(current_revision)
      if capture("cd #{latest_release} && #{source.local.log(from)} vendor/assets/ app/assets/ | wc -l").to_i > 0
        run %Q{cd #{latest_release} && #{rake} RAILS_ENV=#{rails_env} #{asset_env} assets:precompile}
      else
        logger.info "Skipping asset pre-compilation because there were no asset changes"
      end
    end
  end

end