unicorn force restart sequentially (reload /etc/enviroment)

deploy.rb

namespace :unicorn do
  desc 'Force restart Unicorn (sequential)'
  task :force_restart do
    on roles(fetch(:unicorn_roles)), in: :sequence, wait: 10 do
      within current_path do
        if test("[ -e #{fetch(:unicorn_pid)} ]")
          if test("kill -0 #{pid}")
            info 'stopping unicorn...'
            execute :kill, '-s QUIT', pid
          else
            info 'cleaning up dead unicorn pid...'
            execute :rm, fetch(:unicorn_pid)
          end

          sleep(3)

          if test("[ -e #{fetch(:unicorn_pid)} ] && kill -0 #{pid}")
            info 'unicorn is running...'
          else
            with rails_env: fetch(:rails_env) do
              execute :bundle, 'exec unicorn', '-c', fetch(:unicorn_config_path), '-E', fetch(:unicorn_rack_env), '-D', fetch(:unicorn_options)
            end
          end
        else
          info 'unicorn is not running...'
        end
      end
    end
  end
end