formatter.rb

  class Formatter
    def self.slim_template(mirrors, time)
      sync_report_template = RiseMirrorApp::PROJECT_ROOT_DIR + 'templates/sync_report.slim'
      #layout = Slim::Template.new { sync_report_template }
      puts  Slim::Template.new(sync_report_template).render(mirrors)
    end

sync_report.slim

doctype html
html
  head
    title Sync Report
    meta name='author' content='riseops'

  body
    - if mirrors.any?
      table#mirrors
        - for mirror in mirrors
          tr
            td.name = mirror.name
            td.last_successful_sync = mirror.last_successful_sync
            td.start_sync = mirror.start_sync
            td.end_sync = mirror.end_sync
            td.status = mirror.status
            td.total_bandwidth = mirror.total_bandwidth
    - else
      p No mirror information found.