Deploy with mina on DigitalOcean server.

deploy.rb

require 'mina/bundler'
require 'mina/rails'
require 'mina/git'
require 'mina/rvm'
require 'mina_sidekiq/tasks'

set :rails_env, 'production'
set :domain, 'YOUR_IP_OR_DOMAIN'
set :deploy_to, "/home/rails/#{rails_env}"
set :repository, 'git@github.com:fousa/<YOUR_REPOSITORY>.git'
set :branch, 'master'

set :user, 'root'
set :ssh_options, '-A'
set :shared_paths, ['config/database.yml', 'log', 'pids']

set :rvm_path, "/usr/local/rvm/bin/rvm"
task :environment do
  invoke :'rvm:use[ruby-2.0.0-p353@default]'
end

namespace :whenever do
  desc "Clear crontab"
  task :clear do
    queue %{
      echo "-----> Clear crontab for #{domain}_#{rails_env}"
      #{echo_cmd %[cd #{deploy_to!}/#{current_path!} ; bundle exec whenever --clear-crontab #{domain}_#{rails_env} --set 'environment=#{rails_env}&path=#{deploy_to!}/#{current_path!}']}
    }
  end
  desc "Update crontab"
  task :update do
    queue %{
      echo "-----> Update crontab for #{domain}_#{rails_env}"
      #{echo_cmd %[cd #{deploy_to!}/#{current_path!} ; bundle exec whenever --update-crontab #{domain}_#{rails_env} --set 'environment=#{rails_env}&path=#{deploy_to!}/#{current_path!}']}
    }
  end
  desc "Write crontab"
  task :write do
    queue %{
      echo "-----> Update crontab for #{domain}_#{rails_env}"
      #{echo_cmd %[cd #{deploy_to!}/#{current_path!} ; bundle exec whenever --write-crontab #{domain}_#{rails_env} --set 'environment=#{rails_env}&path=#{deploy_to!}/#{current_path!}']}
    }
  end
end

namespace :unicorn do
  set :unicorn_pid, "/home/unicorn/pids/unicorn.pid"
  set :start_unicorn, %{
    service unicorn restart
  }
 
  desc "Start unicorn"
  task :start => :environment do
    queue 'echo "-----> Start Unicorn"'
    queue! start_unicorn
  end
 
  desc "Stop unicorn"
  task :stop do
    queue 'echo "-----> Stop Unicorn"'
    queue! %{
      test -s "#{unicorn_pid}" && kill -QUIT `cat "#{unicorn_pid}"` && echo "Stop Ok" && exit 0
      echo >&2 "Not running"
    }
  end
 
  desc "Restart unicorn using 'upgrade'"
  task :restart => :environment do
    invoke 'unicorn:stop'
    invoke 'unicorn:start'
  end
end

task :setup => :environment do
  queue! %[mkdir -p "#{deploy_to}/shared/log"]
  queue! %[chmod g+rx,u+rwx "#{deploy_to}/shared/log"]

  queue! %[mkdir -p "#{deploy_to}/shared/config"]
  queue! %[chmod g+rx,u+rwx "#{deploy_to}/shared/config"]

  queue! %[touch "#{deploy_to}/shared/config/database.yml"]
  queue  %[echo "-----> Be sure to edit 'shared/config/database.yml'."]

  # sidekiq needs a place to store its pid file and log file
  queue! %[mkdir -p "#{deploy_to}/shared/pids"]
  queue! %[chmod g+rx,u+rwx "#{deploy_to}/shared/pids"]
end

desc "Deploys the current version to the server."
task :deploy => :environment do
  deploy do
    invoke :'sidekiq:quiet'
    invoke :'git:clone'
    invoke :'deploy:link_shared_paths'
    invoke :'bundle:install'
    invoke :'rails:db_migrate'
    invoke :'rails:assets_precompile'

    to :launch do
      invoke :'unicorn:restart'
      invoke :'sidekiq:restart'
    end
  end
end