socialchorus/cumuli

module Cumuli
  class CLI
    class Terminal
      VARS = ['GEM_HOME', 'GEM_PATH', 'RUBYOPT', 'RBENV_DIR']

      attr_reader :command

      def initialize(command)
        @command = command
      end

      def bundled?
        Object.const_defined?('Bundler')
      end

      def spawn
        bundled? ? call_bundled : execute_command
      end

      def call_bundled
        Bundler.with_clean_env do
          clear_env
          execute_command
        end
      end

      def execute_command
        exec(command)
      end

      def clear_env
        VARS.each { |e| ENV.delete(e) }
      end
    end
  end
end