capistrano_config

# Gemfile

  gem 'capistrano',         require: false
  gem 'capistrano-rvm',     require: false
  gem 'capistrano-rails',   require: false
  gem 'capistrano-bundler', require: false
  gem 'capistrano3-puma',   require: false
  
  
# Capfile

  require 'capistrano/setup'
  require 'capistrano/deploy'

  require 'capistrano/rails'
  require 'capistrano/bundler'
  require 'capistrano/rvm'
  require 'capistrano/puma'
  install_plugin Capistrano::Puma

  Dir.glob("lib/capistrano/tasks/*.rake").each { |r| import r }


  # config/deploy.rb

  lock "3.8.1"

  set :repo_url,        'git@github.com:xxxx.git'
  set :application,     'abcd'
  set :user,            'ubuntu'
  set :puma_threads,    [4, 8]
  set :puma_workers,    1
  set :pem_file,        %w(/home/mayur/Documents/project\ docs/abcd.pem)
  set :assets_roles, [:web, :app]

  set :pty,             true
  set :use_sudo,        false

  set :deploy_via,      :remote_cache
  set :deploy_to,       "/var/www/apps/#{fetch(:application)}"
  set :puma_bind,       "unix://#{shared_path}/sockets/puma.sock"
  set :puma_state,      "#{shared_path}/pids/puma.state"
  set :puma_pid,        "#{shared_path}/pids/puma.pid"
  set :puma_access_log, "#{shared_path}/log/puma.stdout.log"
  set :puma_error_log,  "#{shared_path}/log/puma.stderr.log"
  set :ssh_options,     {
    forward_agent: true,
    user: fetch(:user),
    auth_methods: ["publickey"],
    keys: fetch(:pem_file),
    keepalive: true
  }
  set :puma_preload_app, true
  set :puma_worker_timeout, nil
  set :puma_init_active_record, true

  namespace :puma do
    desc 'Create Directories for Puma Pids and Socket'
    task :make_dirs do
      on roles(:app) do
        execute "mkdir #{shared_path}/sockets -p"
        execute "mkdir #{shared_path}/pids -p"
        execute "mkdir #{shared_path}/log -p"
      end
    end

    before :start, :make_dirs
  end


# config/deploy/staging.rb

  server '0.0.0.0', port: 22, roles: [:web, :app, :db], primary: true

  set :branch, :dev
  set :stage,  :staging

  namespace :deploy do
    desc "Make sure local git is in sync with remote."
    task :check_revision do
      on roles(:app) do
        unless `git rev-parse HEAD` == `git rev-parse origin/dev`
          puts "WARNING: HEAD is not the same as origin/dev"
          puts "Run `git push` to sync changes."
          exit
        end
      end
    end

    desc 'Initial Deploy'
    task :initial do
      on roles(:app) do
        before 'deploy:restart', 'puma:start'
        invoke 'deploy'
      end
    end

    desc 'Restart application'
    task :restart do
      on roles(:app), in: :sequence, wait: 5 do
        invoke 'puma:restart'
      end
    end

    desc "Link shared files"
    task :symlink_config_files do
      on roles(:app) do
        execute "ln -s #{shared_path}/config/application.yml #{release_path}/config/application.yml"
      end
    end

    before :starting,       :check_revision
    after  'deploy:symlink:linked_dirs', 'symlink_config_files'
    after  :finishing,      :cleanup
    after  :finishing,      :restart
  end


# config/deploy/production.rb

  server '1.1.1.1', port: 22, roles: [:web, :app, :db], primary: true

  set :branch, :master
  set :stage,  :production

  namespace :deploy do
    desc "Make sure local git is in sync with remote."
    task :check_revision do
      on roles(:app) do
        unless `git rev-parse HEAD` == `git rev-parse origin/master`
          puts "WARNING: HEAD is not the same as origin/master"
          puts "Run `git push` to sync changes."
          exit
        end
      end
    end

    desc 'Initial Deploy'
    task :initial do
      on roles(:app) do
        before 'deploy:restart', 'puma:start'
        invoke 'deploy'
      end
    end

    desc 'Restart application'
    task :restart do
      on roles(:app), in: :sequence, wait: 5 do
        invoke 'puma:restart'
      end
    end

    before :starting,     :check_revision
    after  :finishing,    :compile_assets
    after  :finishing,    :cleanup
    after  :finishing,    :restart
  end