Force capistrano to check your local systems time drift before deploying

deploy.rb

before "deploy", "check_time"

task :check_time do
  offset = `ntpdate -q ntp.ubuntu.com | tail -n 1 | awk -Foffset\  '{print $2}' | awk '{print $1}'`.strip
  if offset.to_f > 1.0
    puts "Your clock is off by #{offset} seconds!  Type `sudo ntpdate ntp.ubuntu.com` and try again."
    exit(1)
  end
end

gistfile1.md

If your local time is way off and you deploy with capistrano bad things can happen.

This task checks your local time before deploying. If it's > 1 second off it halts the deployment, tells you about the problem, and offers an easy way to fix it.