base.rb

def template(from, to)
  erb = File.read(File.expand_path("../templates/#{from}", __FILE__))
  put ERB.new(erb).result(binding), to
end

def set_default(name, *args, &block)
  set(name, *args, &block) unless exists?(name)
end

def set_required(name)
  set_default(name) { throw Exception.new("#{name} variable is required inside deploy.rb") }
end

namespace :deploy do
  desc "Install everything onto the server"
  task :install do
    run "#{sudo} apt-get -y update"
    run "#{sudo} apt-get -y install python-software-properties"
  end
end

namespace :custom do  
  desc "Run a task on a remote server."  
  # run like: cap staging rake:invoke task=a_certain_task  
  task :rake do  
    run("cd #{deploy_to}/current; /usr/bin/env bundle exec rake #{ENV['task']} RAILS_ENV=#{rails_env}")  
  end
end