gistfile1.rb

namespace :deploy do
    task :default do
        transaction do
            deploy.git_log
            deploy.update
            deploy.setup
            deploy.restart
        end
    end

    desc "Send email notification"
    task :send_notification do
        Notifier.deploy_notification(self).deliver
    end

    after :deploy do
        send_notification
    end

    task :git_log, :roles => :web do
        local_sha = `git rev-parse --verify HEAD`
        remote_sha = capture(:stdout) { stream("cd /home/code/current ; git rev-parse --verify HEAD") }
        puts "#{remote_sha.strip}"
        git_log = `/usr/bin/git log #{remote_sha.strip}..#{local_sha.strip} --pretty=format:'%h from %an, %ar, message: %s'`
        puts git_log
        set :history, git_log.gsub(/\n/, '<br>')
    end

    task :setup_web, :roles => :web do
      # web role initiate
    end

    task :setup_ap, :roles => [:worker, :scheduler, :batch] do
       # web roles initiate
    end

    task :setup do
        setup_web
        setup_ap
    end

    task :start_web, :roles => :web do
        # start web
    end

    task :start_worker, :roles => :worker do
        # start worker
    end

    task :start_scheduler, :roles => :scheduler do
        # start scheduler 
    end

    task :start_batch, :roles => :batch do
        # start batch
    end

    task :start do
        start_web
        start_worker
        start_scheduler
        start_batch
    end

    task :stop_web, :roles => :web do
        # stop web
    end

    task :stop_ap, :roles => [:worker, :scheduler, :batch] do
        # stop ap
    end

    task :stop do
        stop_web
        stop_ap
    end

    task :restart do
        stop
        start
    end

    before 'deploy:restart' do
        run "#{sudo :as => 'root'} monit stop all; true"
    end

    after 'deploy:restart' do
        run "#{sudo :as => 'root'} monit start all; true"
    end
end