Capistrano tasks for starting unicorn

Capistrano tasks for starting unicorn.rb

set :unicorn_binary, "/usr/local/bin/unicorn"
set(:unicorn_config) { "#{current_path}/config/unicorn.rb" }
set(:unicorn_pid) { "#{deploy_to}/shared/pids/unicorn.pid" }

namespace :deploy do
  task :start, :roles => :app, :except => { :no_release => true } do 
    run "cd #{current_path} && #{try_sudo} #{unicorn_binary} -c #{unicorn_config} -E #{default_stage} -D"
  end
  task :stop, :roles => :app, :except => { :no_release => true } do 
    run "#{try_sudo} kill `cat #{unicorn_pid}`"
  end
  task :graceful_stop, :roles => :app, :except => { :no_release => true } do
    run "#{try_sudo} kill -s QUIT `cat #{unicorn_pid}`"
  end
  task :reload, :roles => :app, :except => { :no_release => true } do
    run "#{try_sudo} kill -s USR2 `cat #{unicorn_pid}`"
  end
  task :restart, :roles => :app, :except => { :no_release => true } do
    stop
    start
  end
end