engine/lib/locomotive/hosting/heroku.rb

require 'heroku'
require 'heroku/client'
require 'locomotive/hosting/heroku/custom_domain'

module Locomotive
  module Hosting
    module Heroku

      extend ActiveSupport::Concern

      included do
        class << self
          attr_accessor :heroku_connection
          attr_accessor :heroku_domains
        end
      end

      module ClassMethods

        def heroku?
          self.config.hosting == :heroku ||
          (self.config.hosting == :auto && ENV['HEROKU_SLUG'].present?)
        end

        def enable_heroku
          self.config.domain = 'heroku.com'

          self.config.heroku ||= {}
          self.config.heroku[:name] = ENV['APP_NAME']

          raise 'Heroku application name is mandatory' if self.config.heroku[:name].blank?

          self.open_heroku_connection

          self.enhance_site_model_with_heroku

          # "cache" domains for better performance
          self.heroku_domains = self.heroku_connection.list_domains(self.config.heroku[:name]).collect { |h| h[:domain] }
        end

        def open_heroku_connection
          login = self.config.heroku[:login] || ENV['HEROKU_LOGIN']
          password = self.config.heroku[:password] || ENV['HEROKU_PASSWORD']

          self.heroku_connection = ::Heroku::Client.new(login, password)
        end

        def enhance_site_model_with_heroku
          Site.send :include, Locomotive::Hosting::Heroku::CustomDomain
        end

        # manage domains

        def add_heroku_domain(name)
          Locomotive.logger "[add heroku domain] #{name}"
          self.heroku_connection.add_domain(self.config.heroku[:name], name)
          self.heroku_domains << name
        end

        def remove_heroku_domain(name)
          Locomotive.logger "[remove heroku domain] #{name}"
          self.heroku_connection.remove_domain(self.config.heroku[:name], name)
          self.heroku_domains.delete(name)
        end

      end

    end
  end
end