guard-rails-assets/lib/guard/rails-assets.rb

require 'guard'
require 'guard/guard'
require 'rake/dsl_definition'

module Guard
  class RailsAssets < Guard
    def initialize(watchers=[], options={})
      super
      @options = options || {}
      @run_on = @options[:run_on] || [:start, :change]
      @run_on = [@run_on] unless @run_on.respond_to?(:include?)
      @rails_runner = RailsRunner.new
    end

    def start
      compile_assets if run_for? :start
    end

    def reload
      @rails_runner.restart_rails

      compile_assets if run_for? :reload
    end

    def run_all
      compile_assets if run_for? :all
    end

    def run_on_change(paths=[])
      compile_assets if run_for? :change
    end

    def compile_assets
      puts 'Compiling rails assets'
      result = @rails_runner.compile_assets

      if result
        Notifier::notify 'Assets compiled'
      else
        Notifier::notify 'see the details in the terminal', :title => "Can't compile assets", :image => :failed
      end
    end

    def run_for? command
      @run_on.include?(command)
    end
  end
end

require 'guard/rails-assets/rails_runner'