Capistrano running clockwork as daemon

clockwork.rb

after "deploy:stop", "clockwork:stop"
after "deploy:start", "clockwork:start"
after "deploy:restart", "clockwork:restart"

namespace :clockwork do
  desc "Stop clockwork"
  task :stop, :roles => clockwork_roles, :on_error => :continue, :on_no_matching_servers => :continue do
    run "if [ -d #{current_path} ] && [ -f #{pid_file} ]; then cd #{current_path} && kill -INT `cat #{pid
_file}` ; fi"
  end

  desc "Start clockwork"
  task :start, :roles => clockwork_roles, :on_no_matching_servers => :continue do
    run "daemon --inherit --name=clockwork --env='#{rails_env}' --output=#{log_file} --pidfile=#{pid_file
} -D #{current_path} -- bundle exec clockwork config/clockwork.rb"
  end

  desc "Restart clockwork"
  task :restart, :roles => clockwork_roles, :on_no_matching_servers => :continue do
    stop
    start
  end

  def rails_env
    fetch(:rails_env, false) ? "RAILS_ENV=#{fetch(:rails_env)}" : ''
  end

  def log_file
    fetch(:clockwork_log_file, "#{current_path}/log/clockwork.log")
  end

  def pid_file
    fetch(:clockwork_pid_file, "#{current_path}/tmp/pids/clockwork.pid")
  end
end

I have a few questions about this, do you think you can help me?