sudoers

nick ALL=NOPASSWD:/sbin/start foo,/sbin/stop foo,/sbin restart foo,/sbin/service foo start,/sbin/service foo stop,/sbin/service foo restart,/home/nick/.rvm/wrappers/foo/foreman

task.rb

  desc "Restart application"
  task :restart do
    on roles(:app) do
      execute :rvm, "alias create #{fetch(:application)} #{fetch(:rvm_ruby_version)}"
      execute :rvm, "wrapper #{fetch(:application)} --no-links bundle"
      
      #invoke "foreman:export" # <-- this does not work in cap v3
      execute "sudo /home/nick/.rvm/wrappers/my_app/bundle exec foreman export upstart /etc/init -e #{fetch(:rails_env)} -a #{fetch(:application)} -u #{fetch(:user)} -l /var/#{fetch(:application)}/log"

      # on OS X the equivalent pid-finding command is `ps | grep '/puma' | head -n 1 | awk {'print $1'}`
      execute "(kill -s SIGUSR1 $(ps -C ruby -F | grep '/puma' | awk {'print $2'})) || sudo service #{fetch(:application)} restart"

      # foreman.restart # uncomment this (and comment line above) if we need to read changes to the procfile
    end
  end