Integração de gems com o Rails @ RS on Rails

Transcript

1. Railties
   INTEGRANDO GEMS
   COM O RAILS
   

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2. @cantoniodasilva
   Carlos Antonio
   

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4. Devise
   maintainer
   

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5. SimpleForm
   maintainer
   

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6. Responders
   maintainer
   

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7. Rails
   commiter
   

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8. guru
   SC
   

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9. Railties
   INTEGRANDO GEMS
   COM O RAILS
   

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10. The Road So Far...
    

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11. Rails
    2.3
    

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12. Plugins!
    vendor/plugins
    

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13. script/plugin install
    git://github.com/SomeGuy/
    my_awesome_plugin.git
    

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14. Engines!
    app/*
    

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15. App
    Engine
    

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16. module Rails
    class Plugin
    # Engines are plugins with an app/ directory.
    def engine?
    has_app_directory?
    end
    private
    def has_app_directory?
    File.directory?(File.join(directory, 'app'))
    end
    end
    end
    https://github.com/rails/rails/blob/2-3-stable/railties/lib/rails/plugin.rb
    

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17. module Rails
    class Plugin
    # Engines are plugins with an app/ directory.
    def engine?
    has_app_directory?
    end
    private
    def has_app_directory?
    File.directory?(File.join(directory, 'app'))
    end
    end
    end
    https://github.com/rails/rails/blob/2-3-stable/railties/lib/rails/plugin.rb
    # Engines are plugins with an app/ directory.
    def engine?
    has_app_directory?
    end
    private
    def has_app_directory?
    File.directory?(File.join(directory, 'app'))
    end
    

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19. app/ models
    controllers
    helpers
    config/ routes.rb
    

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20. module Rails
    class Plugin
    def view_path
    File.join(directory, 'app', 'views')
    end
    def controller_path
    File.join(directory, 'app', 'controllers')
    end
    def routing_file
    File.join(directory, 'config', 'routes.rb')
    end
    private
    def app_paths
    [ File.join(directory, 'app', 'models'),
    File.join(directory, 'app', 'helpers'),
    controller_path, metal_path ]
    end
    end
    end
    https://github.com/rails/rails/blob/2-3-stable/railties/lib/rails/plugin.rb
    

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21. module Rails
    class Plugin
    def view_path
    File.join(directory, 'app', 'views')
    end
    def controller_path
    File.join(directory, 'app', 'controllers')
    end
    def routing_file
    File.join(directory, 'config', 'routes.rb')
    end
    private
    def app_paths
    [ File.join(directory, 'app', 'models'),
    File.join(directory, 'app', 'helpers'),
    controller_path, metal_path ]
    end
    end
    end
    https://github.com/rails/rails/blob/2-3-stable/railties/lib/rails/plugin.rb
    def view_path
    File.join(directory, 'app', 'views')
    end
    def controller_path
    File.join(directory, 'app', 'controllers')
    end
    def routing_file
    File.join(directory, 'config', 'routes.rb')
    end
    private
    def app_paths
    [ File.join(directory, 'app', 'models'),
    File.join(directory, 'app', 'helpers'),
    controller_path, metal_path ]
    end
    

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22. Rails
    Active Record
    

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23. module Rails
    class Initializer
    def load_observers
    if gems_dependencies_loaded &&
    configuration.frameworks.include?(:active_record)
    ActiveRecord::Base.instantiate_observers
    end
    end
    def initialize_database
    if configuration.frameworks.include?(:active_record)
    ActiveRecord::Base.configurations =
    configuration.database_configuration
    ActiveRecord::Base.establish_connection
    end
    end
    end
    end
    https://github.com/rails/rails/blob/2-3-stable/railties/lib/initializer.rb
    

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24. module Rails
    class Initializer
    def load_observers
    if gems_dependencies_loaded &&
    configuration.frameworks.include?(:active_record)
    ActiveRecord::Base.instantiate_observers
    end
    end
    def initialize_database
    if configuration.frameworks.include?(:active_record)
    ActiveRecord::Base.configurations =
    configuration.database_configuration
    ActiveRecord::Base.establish_connection
    end
    end
    end
    end
    https://github.com/rails/rails/blob/2-3-stable/railties/lib/initializer.rb
    if gems_dependencies_loaded &&
    configuration.frameworks.include?(:active_record)
    ActiveRecord::Base.instantiate_observers
    end
    if configuration.frameworks.include?(:active_record)
    ActiveRecord::Base.configurations =
    configuration.database_configuration
    ActiveRecord::Base.establish_connection
    end
    

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25. module Rails
    class Initializer
    private
    def default_frameworks
    [ :active_record, :action_controller,
    :action_view, :action_mailer, :active_resource ]
    end
    end
    end
    https://github.com/rails/rails/blob/2-3-stable/railties/lib/initializer.rb
    

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26. module Rails
    class Initializer
    private
    def default_frameworks
    [ :active_record, :action_controller,
    :action_view, :action_mailer, :active_resource ]
    end
    end
    end
    https://github.com/rails/rails/blob/2-3-stable/railties/lib/initializer.rb
    def default_frameworks
    [ :active_record, :action_controller,
    :action_view, :action_mailer, :active_resource ]
    end
    

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27. ORMs
    

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28. ORMs
    Sequel MongoMapper
    DataMapper Mongoid
    

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29. Frágil
    

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30. monkey
    Patch
    

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31. module Rails
    class Initializer
    def process
    Rails.configuration = configuration
    check_ruby_version
    install_gem_spec_stubs
    set_load_path
    add_gem_load_paths
    require_frameworks
    set_autoload_paths
    add_plugin_load_paths
    load_environment
    preload_frameworks
    initialize_encoding
    initialize_database
    initialize_cache
    initialize_framework_caches
    initialize_logger
    initialize_framework_logging
    initialize_dependency_mechanism
    initialize_whiny_nils
    initialize_time_zone
    initialize_i18n
    initialize_framework_settings
    initialize_framework_views
    initialize_metal
    add_support_load_paths
    check_for_unbuilt_gems
    load_gems
    load_plugins
    https://github.com/rails/rails/blob/2-3-stable/railties/lib/initializer.rb
    # pick up any gems that plugins depend on
    add_gem_load_paths
    load_gems
    check_gem_dependencies
    # bail out if gems are missing - note that check_gem_dependencies
    # will have already called abort() unless $gems_rake_task is set
    return unless gems_dependencies_loaded
    load_application_initializers
    # the framework is now fully initialized
    after_initialize
    # Setup database middleware after initializers have run
    initialize_database_middleware
    # Prepare dispatcher callbacks and run 'prepare' callbacks
    prepare_dispatcher
    # Routing must be initialized after plugins to allow the former to
    # extend the routes
    initialize_routing
    # Observers are loaded after plugins in case Observers or observed
    # models are modified by plugins.
    load_observers
    # Load view path cache
    load_view_paths
    # Load application classes
    load_application_classes
    # Disable dependency loading during request cycle
    disable_dependency_loading
    # Flag initialized
    Rails.initialized = true
    end
    end
    end
    

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32. Single
    Responsibility
    Principle
    

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33. Single
    Responsibility
    Principle
    

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34. Rails
    3
    

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35. Modularidade
    

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36. Rails
    Active Record
    

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37. Rails
    Active Record
    

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38. Rails
    

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39. Rails
    Action Controller
    Action Mailer
    Action View
    Active Record
    Active Resource
    

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40. Rails
    

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41. Rails
    DataMapper
    Devise
    RSpec
    Mongoid
    etc...
    

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42. Hooks!
    

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43. Rails::
    Railtie
    

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44. Configuração
    &
    Inicialização
    

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45. Config
    

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46. module Responders
    class Railtie < ::Rails::Railtie
    config.responders = ActiveSupport::OrderedOptions.new
    config.responders.flash_keys = [ :notice, :alert ]
    # ...
    end
    end
    https://github.com/plataformatec/responders/blob/v0.9.2/lib/responders.rb
    Responders
    

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47. module MyApp
    class Application < ::Rails::Application
    config.responders.flash_keys = [ :success, :failure ]
    end
    end
    

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48. Initializers
    

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49. module Responders
    class Railtie < ::Rails::Railtie
    config.responders.flash_keys = [ :notice, :alert ]
    initializer "responders.flash_responder" do |app|
    Responders::FlashResponder.flash_keys =
    app.config.responders.flash_keys
    # ...
    end
    end
    end
    https://github.com/plataformatec/responders/blob/v0.9.2/lib/responders.rb
    Responders
    

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50. module CarrierWave
    class Railtie < Rails::Railtie
    initializer "carrierwave.setup_paths" do
    CarrierWave.root =
    Rails.root.join(Rails.public_path).to_s
    # ...
    end
    end
    end
    https://github.com/jnicklas/carrierwave/blob/v0.6.2/lib/carrierwave.rb
    CarrierWave
    

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51. Initializers
    + Hooks
    

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52. module MyGem
    class Railtie < Rails::Railtie
    config.before_configuration {
    # Executa antes das configurações do usuário
    }
    end
    end
    

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53. module MyGem
    class Railtie < Rails::Railtie
    config.before_initialize {
    # Depois da config do usuário, mas antes dos
    # initializers.
    }
    end
    end
    

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54. module MyGem
    class Railtie < Rails::Railtie
    config.to_prepare {
    # cache_classes = false (development)
    # Roda toda vez antes de recarregar o ambiente.
    # cache_classes = true (production)
    # Roda antes da primeira requisição.
    }
    end
    end
    

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55. module MyGem
    class Railtie < Rails::Railtie
    config.before_eager_load {
    # Antes de carregar todo o código da aplicação,
    # somente com cache_classes true.
    }
    end
    end
    

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56. module MyGem
    class Railtie < Rails::Railtie
    config.after_initialize {
    # Após todos os demais (configs, initializers, etc),
    # uma única vez antes da primeira requisição.
    }
    end
    end
    

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57. Development
    before_configuration
    => Booting WEBrick
    before_initialize
    to_prepare
    after_initialize
    [...] INFO WEBrick 1.3.1
    to_prepare
    Request...
    to_prepare
    Request...
    to_prepare
    Production (cache_classes)
    before_configuration
    => Booting WEBrick
    before_initialize
    to_prepare
    before_eager_load
    after_initialize
    [...] INFO WEBrick 1.3.1
    Request...
    Request...
    

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58. Development
    before_configuration
    => Booting WEBrick
    before_initialize
    to_prepare
    after_initialize
    [...] INFO WEBrick 1.3.1
    to_prepare
    Request...
    to_prepare
    Request...
    to_prepare
    Production (cache_classes)
    before_configuration
    => Booting WEBrick
    before_initialize
    to_prepare
    before_eager_load
    after_initialize
    [...] INFO WEBrick 1.3.1
    Request...
    Request...
    

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59. module ActiveRecord
    class Railtie < Rails::Railtie
    config.after_initialize do
    ActiveSupport.on_load(:active_record) do
    instantiate_observers
    ActionDispatch::Reloader.to_prepare do
    ActiveRecord::Base.instantiate_observers
    end
    end
    end
    end
    end
    https://github.com/rails/rails/tree/3-2-stable/activerecord/lib/active_record/railtie.rb
    Active Record
    

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60. module Rails
    module Mongoid
    class Railtie < Rails::Railtie
    initializer "instantiate observers" do
    config.after_initialize do
    ::Mongoid::instantiate_observers
    ActionDispatch::Reloader.to_prepare do
    ::Mongoid.instantiate_observers
    end
    end
    end
    end
    end
    end
    https://github.com/mongoid/mongoid/blob/3.0.0-stable/lib/mongoid/railtie.rb
    Mongoid
    

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61. module Haml
    module Rails
    class Railtie < ::Rails::Railtie
    config.before_initialize do
    Haml.init_rails(binding)
    Haml::Template.options[:format] = :html5
    end
    end
    end
    end
    https://github.com/indirect/haml-rails/blob/v0.3.5/lib/haml-rails.rb
    Haml
    

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62. Generators
    

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63. simple_form
    lib
    generators
    simple_form
    install_generator.rb
    https://github.com/plataformatec/simple_form
    SimpleForm
    

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64. simple_form
    lib
    generators
    simple_form
    install_generator.rb
    Namespace
    https://github.com/plataformatec/simple_form
    SimpleForm
    

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65. simple_form
    lib
    generators
    simple_form
    install_generator.rb
    Namespace
    Generator
    https://github.com/plataformatec/simple_form
    SimpleForm
    

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66. module SimpleForm
    module Generators
    class InstallGenerator < Rails::Generators::Base
    desc "Copy SimpleForm default files"
    source_root File.expand_path('../templates', __FILE__)
    def copy_config
    directory 'config'
    end
    def copy_scaffold_template
    # ...
    end
    end
    end
    end
    https://github.com/plataformatec/simple_form/blob/v2.0.2/lib/generators/simple_form/install_generator.rb
    SimpleForm
    

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67. rails generate
    simple_form:install
    

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68. Convenções
    

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69. module MyGem
    class Railtie < ::Rails::Railtie
    generators do
    require "my_gem/generators"
    end
    end
    end
    

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70. Generators
    + Hooks
    

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71. module ActiveRecord
    class Railtie < Rails::Railtie
    config.app_generators.orm :active_record,
    :migration => true, :timestamps => true
    end
    end
    https://github.com/rails/rails/tree/3-2-stable/activerecord/lib/active_record/railtie.rb
    Active Record
    

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72. module Rails
    module Mongoid
    class Railtie < Rails::Railtie
    def self.generator
    config.respond_to?(:app_generators) ?
    :app_generators : :generators
    end
    config.send(generator).orm :mongoid,
    migration: false
    end
    end
    end
    https://github.com/mongoid/mongoid/blob/3.0.0-stable/lib/mongoid/railtie.rb
    Mongoid
    

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73. module RSpec
    module Rails
    class Railtie < ::Rails::Railtie
    generators = config.respond_to?(:app_generators) ?
    config.app_generators : config.generators
    generators.integration_tool :rspec
    generators.test_framework :rspec
    end
    end
    end
    https://github.com/rspec/rspec-rails/blob/v2.11.0/lib/rspec-rails.rb
    RSpec
    

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74. module Responders
    class Railtie < ::Rails::Railtie
    if config.respond_to?(:app_generators)
    config.app_generators.scaffold_controller =
    :responders_controller
    else
    config.generators.scaffold_controller =
    :responders_controller
    end
    end
    end
    https://github.com/plataformatec/responders/blob/v0.9.2/lib/responders.rb
    Responders
    

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75. module Haml
    module Rails
    class Railtie < ::Rails::Railtie
    if ::Rails.version.to_f >= 3.1
    config.app_generators.template_engine :haml
    else
    config.generators.template_engine :haml
    end
    end
    end
    end
    https://github.com/indirect/haml-rails/blob/v0.3.5/lib/haml-rails.rb
    Haml
    

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76. :assets => true
    :force_plural => false
    :helper => true
    :integration_tool => nil
    :javascripts => true
    :javascript_engine => :js
    :orm => false
    :performance_tool => nil
    :resource_controller => :controller
    :resource_route => true
    :scaffold_controller => :scaffold_controller
    :stylesheets => true
    :stylesheet_engine => :css
    :test_framework => false
    :template_engine => :erb
    https://github.com/rails/rails/blob/3-2-stable/railties/lib/rails/generators.rb
    

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77. Console
    

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78. module MyGem
    class Railtie < Rails::Railtie
    console do
    puts "Hello console!"
    end
    end
    end
    

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79. module ActiveRecord
    class Railtie < Rails::Railtie
    console do |app|
    if app.sandbox?
    require "active_record/railties/console_sandbox"
    end
    ActiveRecord::Base.logger = Logger.new(STDERR)
    end
    end
    end
    https://github.com/rails/rails/tree/3-2-stable/activerecord/lib/active_record/railtie.rb
    Active Record
    

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80. module PryRails
    class Railtie < Rails::Railtie
    console do
    # ... código para carregar o Pry
    end
    end
    end
    https://github.com/rweng/pry-rails/blob/master/lib/pry-rails/railtie.rb
    Pry Rails
    

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81. Rails
    4
    SPOILER
    

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82. RAILS 4
    https://github.com/rails/rails/commit/951b582
    

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83. module PryRails
    class Railtie < Rails::Railtie
    console do
    if Rails::VERSION::MAJOR == 4
    Rails.application.config.console = Pry
    end
    end
    end
    end
    https://github.com/rweng/pry-rails/blob/master/lib/pry-rails/railtie.rb
    Pry Rails
    

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84. Rake Tasks
    

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85. module RSpec
    module Rails
    class Railtie < ::Rails::Railtie
    rake_tasks do
    load "rspec/rails/tasks/rspec.rake"
    end
    end
    end
    end
    https://github.com/rspec/rspec-rails/blob/v2.11.0/lib/rspec-rails.rb
    RSpec
    

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86. module ActiveRecord
    class Railtie < Rails::Railtie
    rake_tasks do
    load "active_record/railties/databases.rake"
    end
    end
    end
    https://github.com/rails/rails/tree/3-2-stable/activerecord/lib/active_record/railtie.rb
    Active Record
    

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87. module Rails
    module Mongoid
    class Railtie < Rails::Railtie
    rake_tasks do
    load "mongoid/railties/database.rake"
    end
    end
    end
    end
    https://github.com/mongoid/mongoid/blob/3.0.0-stable/lib/mongoid/railtie.rb
    Mongoid
    

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88. Framework
    Loading
    

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89. module MyGem
    module SimpleFormExtensions
    def special_input(*)
    # ...
    end
    end
    end
    SimpleForm::FormBuilder.send(
    :include, MyGem::SimpleFormExtensions)
    

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90. module MyGem
    module SimpleFormExtensions
    def special_input(*)
    # ...
    end
    end
    end
    SimpleForm::FormBuilder.send(
    :include, MyGem::SimpleFormExtensions)
    

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91. module SimpleForm
    class FormBuilder
    end
    end
    ActiveSupport.run_load_hooks(
    :simple_form, SimpleForm::FormBuilder)
    

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92. module MyGem
    module SimpleFormExtensions
    def special_input(*)
    # ...
    end
    end
    end
    ActiveSupport.on_load(:simple_form) do
    include MyGem::SimpleFormExtensions
    end
    

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93. module ActiveRecord
    class Base
    end
    end
    ActiveSupport.run_load_hooks(
    :active_record, ActiveRecord::Base)
    https://github.com/rails/rails/blob/3-2-stable/activerecord/lib/active_record/base.rb
    Active Record
    

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94. module ActiveRecord
    class Railtie < Rails::Railtie
    initializer "active_record.initialize_timezone" do
    ActiveSupport.on_load(:active_record) do
    self.time_zone_aware_attributes = true
    self.default_timezone = :utc
    end
    end
    end
    end
    https://github.com/rails/rails/tree/3-2-stable/activerecord/lib/active_record/railtie.rb
    Active Record
    

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95. module MyGem
    module ActiveRecordExtensions
    end
    end
    ActiveSupport.on_load(:active_record) do
    include MyGem::ActiveRecordExtensions
    end
    

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96. ActiveSupport.on_load(:active_record) do
    include MyGem::ActiveRecordExtensions
    end
    ActiveSupport.on_load(:action_controller) do
    include MyGem::ActionControllerExtensions
    end
    

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97. Criar uma
    Railtie?
    

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98. module MyGem
    class Railtie < Rails::Railtie
    end
    end
    

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99. Você nem sempre
    precisa de uma
    Railtie!
    

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100. Initializers
     Railtie: quando?
     

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101. rake tasks
     Railtie: quando?
     

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102. Expor configs
     de sua gem
     Railtie: quando?
     

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103. Extensões para o
     console
     Railtie: quando?
     

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104. Generators em outro
     diretório
     Railtie: quando?
     

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105. Alterar um
     generator default
     Railtie: quando?
     

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106. Rails::
     Engine
     

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107. Engine < Railtie
     

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108. Paths + Autoload
     

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109. app/ *
     assets
     controllers
     helpers
     mailers
     models
     views
     

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110. https://github.com/plataformatec/devise/tree/v2.1.2/app
     

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111. config/ environments/
     #{Rails.env}.rb
     initializers/*.rb
     locales/*.{rb,yml}
     routes.rb
     

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112. https://github.com/plataformatec/devise/tree/v2.1.2/config
     

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113. lib/ assets/*
     tasks/*.rake
     vendor/ assets/*
     

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114. https://github.com/rails/jquery-rails/tree/v2.1.2/vendor/assets/javascripts
     

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115. module MyGem
     class Railtie < ::Rails::Engine
     # Você pode alterar os paths padrão.
     paths.app.controllers << "lib/controllers"
     end
     end
     

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116. Criar uma
     Engine?
     

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117. module MyGem
     class Railtie < ::Rails::Engine
     end
     end
     

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118. module Jquery
     module Rails
     class Engine < ::Rails::Engine
     end
     end
     end
     https://github.com/rails/jquery-rails/blob/v2.1.2/lib/jquery/rails/engine.rb
     Jquery Rails
     

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119. module Devise
     class Engine < ::Rails::Engine
     config.devise = Devise
     # Force routes to be loaded if we are doing any
     # eager load.
     config.before_eager_load { |app| app.reload_routes! }
     initializer "devise.url_helpers" do
     Devise.include_helpers(Devise::Controllers)
     end
     initializer "devise.omniauth" do |app|
     # ...
     end
     # ...
     end
     end https://github.com/plataformatec/devise/blob/v2.1.2/lib/devise/rails.rb
     Devise
     

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120. Quando eu preciso
     de uma Engine?
     

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121. Rotas
     Railtie: quando?
     

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122. Models
     Railtie: quando?
     

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123. Controllers
     Railtie: quando?
     

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124. Views
     Railtie: quando?
     

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125. app/*
     Railtie: quando?
     

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126. config/*
     Railtie: quando?
     

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127. Rails::
     Plugin
     

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128. Plugin < Engine
     

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129. rails plugin install
     

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130. vendor/plugins
     

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131. init.rb
     

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132. Criar uma
     Plugin?
     

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133. Você não cria :)
     

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134. module Rails
     class Plugin < Engine
     def self.inherited(base)
     raise "You cannot inherit from Rails::Plugin"
     end
     end
     end
     https://github.com/rails/rails/blob/3-2-stable/railties/lib/rails/plugin.rb
     

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135. module Rails
     class Plugin < Engine
     def self.inherited(base)
     raise "You cannot inherit from Rails::Plugin"
     end
     end
     end
     https://github.com/rails/rails/blob/3-2-stable/railties/lib/rails/plugin.rb
     def self.inherited(base)
     raise "You cannot inherit from Rails::Plugin"
     end
     

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136. Lembre-se:
     interno ao Rails :)
     

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137. Quando eu preciso
     de um Plugin?
     

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138. Você não precisa
     (não mais :)
     

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139. Rails
     4
     SPOILER
     

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140. RAILS 4
     https://github.com/rails/rails/commit/dad7fdc
     

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141. gems <3
     

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142. Rails::
     Application
     

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143. Application < Engine
     

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144. Start!
     

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145. require
     config/boot.rb
     Rails boot
     

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146. require
     railties + engines
     Rails boot
     

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147. Define
     Rails.application
     Rails boot
     

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148. Run
     before_configuration
     Rails boot
     

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149. Load
     config/environment/ENV.rb
     Rails boot
     

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150. Run
     before_initialize
     Rails boot
     

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151. Initialize
     railties
     Rails boot
     

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152. Configure
     railties
     Rails boot
     

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153. Run
     railties#initializers
     Rails boot
     

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154. Build
     middleware
     Rails boot
     

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155. Run
     to_prepare
     Rails boot
     

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156. Run
     before_eager_load
     Rails boot
     

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157. Run
     after_initialize
     Rails boot
     

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158. Booted!
     

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159. Criar uma
     Application?
     

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160. rails new my_app
     

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161. module MyApp
     class Application < Rails::Application
     end
     end
     

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162. >> require 'rails/all'
     => true
     >> class MyApp < Rails::Application; end
     => nil
     >> Rails.application
     => #
     >> class OtherApp < Rails::Application; end
     RuntimeError:
     You cannot have more than one Rails::Application
     

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163. Single
     Responsibility
     Principle
     

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164. Win!
     

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165. Criando uma gem
     

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166. Bundler
     

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167. $ bundle gem rsonrails
     create rsonrails/Gemfile
     create rsonrails/Rakefile
     create rsonrails/LICENSE.txt
     create rsonrails/README.md
     create rsonrails/.gitignore
     create rsonrails/rsonrails.gemspec
     create rsonrails/lib/rsonrails.rb
     create rsonrails/lib/rsonrails/version.rb
     Initializating git repo in /Users/carlos/rsonrails
     bundle gem
     

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168. Copyright (c) 2012 Carlos Antonio da Silva
     MIT License
     Permission is hereby granted, free of
     charge, to any person obtaining...
     License
     

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169. # Rsonrails
     TODO: Write a gem description
     ## Installation
     Add this line to your application's Gemfile:
     gem 'rsonrails'
     ...
     ## Usage
     ...
     ## Contributing
     ...
     Readme
     

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170. source 'https://rubygems.org'
     # Specify your gem's dependencies in
     rsonrails.gemspec
     gemspec
     Gemfile
     

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171. # -*- encoding: utf-8 -*-
     lib = File.expand_path('../lib', __FILE__)
     $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
     require 'rsonrails/version'
     Gem::Specification.new do |gem|
     gem.name = "rsonrails"
     gem.version = Rsonrails::VERSION
     gem.authors = ["Carlos Antonio da Silva"]
     gem.email = ["carlosantoniodasilva@gmail.com"]
     gem.description = %q{TODO: Write a gem description}
     gem.summary = %q{TODO: Write a gem summary}
     gem.homepage = ""
     gem.files = `git ls-files`.split($/)
     gem.executables = gem.files.grep(%r{^bin/}).map{ |f| File.basename(f) }
     gem.test_files = gem.files.grep(%r{^(test|spec|features)/})
     gem.require_paths = ["lib"]
     end
     rsonrails.gemspec
     

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172. require "rsonrails/version"
     module Rsonrails
     # Your code goes here...
     end
     lib/rsonrails.rb
     

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173. module Rsonrails
     VERSION = "0.0.1"
     end
     lib/rsonrails/version.rb
     

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174. Railtie?
     

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175. module Rsonrails
     class Railtie < Rails::Railtie
     # config.rsonrails =
     ActiveSupport::OrderedOptions.new
     # rake_tasks {}
     # config.to_prepare {}
     # initializer {}
     end
     end
     lib/rsonrails.rb
     

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176. module Rsonrails
     class Railtie < Rails::Railtie
     # config.rsonrails =
     ActiveSupport::OrderedOptions.new
     # rake_tasks {}
     # config.to_prepare {}
     # initializer {}
     end
     end
     require "rsonrails/version"
     require "rsonrails/railtie"
     module Rsonrails
     # Your code goes here...
     end
     lib/rsonrails/railtie.rb
     lib/rsonrails.rb
     

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177. ! Rails?
     

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178. require "rsonrails/version"
     if defined?(Rails)
     require "rsonrails/railtie"
     end
     module Rsonrails
     # Your code goes here...
     end
     lib/rsonrails.rb
     

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179. require "bundler/gem_tasks"
     Rakefile
     

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180. $ rake -T
     rake build # Build rsonrails-0.0.1.gem
     into the pkg directory
     rake install # Build and install rsonrails-0.0.1.gem
     into system gems
     rake release # Create tag v0.0.1 and build and push
     rsonrails-0.0.1.gem to Rubygems
     rake tasks
     

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181. Bundler
     

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182. Bundler
     <3 <3 <3
     

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183. View Slide

184. Railtie
     Engine
     Application
     

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185. View Slide

186. plataformatec/
     simple_form
     

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187. plataformatec/
     responders
     

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188. plataformatec/
     devise
     

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189. rails/rails/
     **/*railtie.rb
     

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190. http://pragprog.com/book/jvrails/crafting-rails-applications
     

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191. WITH GREAT
     MOUSTACHE
     COMES GREAT
     RESPONSIBILITY
     

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192. Estamos contratando!
     plataformatec.com.br
     

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193. View Slide

194. INTEGRANDO GEMS
     COM O RAILS
     @cantoniodasilva
     Obrigado!
     

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