Capistrano::Configuration.instance.load do
  set(:pattern, '')
  set(:all_logs, false)

  namespace :syslog do
    desc "Grep the sys"
    task :grep do
      syslogs_name = if all_logs
        '/var/log/syslog*'
      else
        '/var/log/syslog'
      end

      if pattern.to_s.strip != ''
        sudo "zgrep -E #{pattern} #{syslogs_name}"
      else
        fail "No pattern specified, please use -s pattern=PATTERN"
      end
    end
  end
end