def safe_index
  sunspot_models = Sunspot.searchable

  index_options = { batch_commit: false, batch_size: 1000 }

  begin
    require 'progress_bar'
    total_documents = sunspot_models.map { | m | m.count }.sum
    index_options[:progress_bar] = ProgressBar.new(total_documents)
  rescue LoadError => e
    $stdout.puts "Skipping progress bar: for progress reporting, add gem 'progress_bar' to your Gemfile"
  rescue Exception => e
    $stderr.puts "Error using progress bar: #{e.message}"
  end

  sunspot_models.each do |model|
    model.solr_index index_options
  end
end