Capistrano tasks for stopping Sidekiq

sidekiq.rake

# lib/capistrano/tasks/sidekiq.rake

namespace :load do
  task :defaults do
    set :sidekiq_role, ->{ :app }
  end
end

namespace :sidekiq do
  def for_each_process(command)
    on roles fetch(:sidekiq_role) do
      execute "for file in `find '#{current_path}/tmp/pids/' -name 'sidekiq*'`; do #{command}; done || true"
    end
  end

  # https://github.com/mperham/sidekiq/wiki/Signals
  def kill_processes(signal)
    unless ENV['SIDEKIQ']=='0'
      for_each_process "pid=`cat $file`; echo Sending #{signal} to Sidekiq $pid; kill -#{signal} $pid"
    end
  end

  desc "Term sidekiq"
  task :stop do
    kill_processes :TERM
  end

  desc "Quiet sidekiq (stop accepting new work)"
  task :quiet do
    kill_processes :USR1
  end

  after 'deploy:starting',   'sidekiq:quiet'
  after 'deploy:publishing', 'sidekiq:stop'
end