Tag git after deploy

after "deploy:update_code", "tag_last_deploy"

task :tag_last_deploy do
  if rails_env == 'production'
    set :timestamp, Time.now
    set :tag_name, "deployed_to_#{rails_env}_#{timestamp.to_i}"
    `git pull origin #{branch}`
    `git tag -a -m "Tagging deploy to #{rails_env} at #{timestamp}" #{tag_name} origin/#{branch}`
    `git push --tags`
    puts "Tagged release with #{tag_name}."
  end
end