module Guard
  class Dsl
    
    def self.evaluate_guardfile
      guardfile = "#{Dir.pwd}/Guardfile"
      if File.exists?(guardfile)
        begin
          dsl = new
          dsl.instance_eval(File.read(guardfile.to_s), guardfile.to_s, 1)
        rescue
          UI.error "Invalid Guardfile, original error is:\n#{$!}"
          exit 1
        end
      else
        UI.error "No Guardfile in current folder, please create one."
        exit 1
      end
    end
    
    def self.guardfile_included?(guard_name)
      File.read('Guardfile').include?("guard '#{guard_name}'")
    end
    
    def guard(name, options = {}, &definition)
      @watchers = []
      definition.call if definition
      ::Guard.add_guard(name, @watchers, options)
    end
    
    def watch(pattern, &action)
      @watchers << ::Guard::Watcher.new(pattern, action)
    end
    
  end
end