A application template file for rails

template.rb

def say_custom(text)
  say "\033[1m\033[36mcustom template\033[0m #{text}"
end

say_custom "Adding additional gems"

gem_group :development do
  gem "selenium-webdriver"
  gem "webdrivers"
  gem "simplecov", require: false
end

gem_group :development, :test do
  gem "ffaker"
  gem "rspec-rails"
  gem "factory_bot_rails"
  gem "dotenv-rails"
  gem "standardrb"
  gem "debase"
  gem "ruby-debug-ide"
end

say_custom "Force mysql usage"

prepend_to_file "Gemfile", after: /gem .*sqlite3/ do
  <<~CODE
    # Use mysql as the database for Active Record
    gem "mysql2", "~> 0.5"

  CODE
end

gsub_file "Gemfile", /^\s*.*Use sqlite3.*\n/i, ""
gsub_file "Gemfile", /^\s*.*gem .*sqlite3.*\n/i, ""

say_custom "Override database.yml"
remove_file "config/database.yml"

create_file "config/database.yml" do
  <<~CODE
    # MySQL. Versions 5.5.8 and up are supported.
    #
    # Install the MySQL driver
    #   gem install mysql2
    #
    # Ensure the MySQL gem is defined in your Gemfile
    #   gem "mysql2"
    #
    # And be sure to use new-style password hashing:
    #   https://dev.mysql.com/doc/refman/5.7/en/password-hashing.html
    #
    default: &default
      url: <%= ENV["DATABASE_URL"] %>
    
    development:
      <<: *default
      url: <%= ENV["DEVELOPMENT_DATABASE_URL"] %>
    
    # Warning: The database defined as "test" will be erased and
    # re-generated from your development database when you run "rake".
    # Do not set this db to the same as development or production.
    test:
      <<: *default
      url: <%= ENV["TEST_DATABASE_URL"] %>
    
    # As with config/credentials.yml, you never want to store sensitive information,
    # like your database password, in your source code. If your source code is
    # ever seen by anyone, they now have access to your database.
    #
    # Instead, provide the password or a full connection URL as an environment
    # variable when you boot the app. For example:
    #
    #   DATABASE_URL="mysql2://myuser:mypass@localhost/somedatabase"
    #
    # If the connection URL is provided in the special DATABASE_URL environment
    # variable, Rails will automatically merge its configuration values on top of
    # the values provided in this file. Alternatively, you can specify a connection
    # URL environment variable explicitly:
    #
    #   production:
    #     url: <%= ENV["MY_APP_DATABASE_URL"] %>
    #
    # Read https://guides.rubyonrails.org/configuring.html#configuring-a-database
    # for a full overview on how database connection configuration can be specified.
    #
    production:
      <<: *default
  CODE
end

say_custom "Fix sassc issue with OSX"

application <<~CODE
  # issues with sassc and OSX 
  # [BUG] Segmentation fault at 0x0
  #
  # * https://github.com/rails/sprockets/issues/633
  # * https://github.com/sass/sassc-ruby/issues/207
  config.assets.configure do |assets_config|
    assets_config.export_concurrent = false
  end
CODE

uncomment_lines "Gemfile", /sassc-rails/

after_bundle do
  say_custom "Execute additional initializers"

  unless options[:skip_bundle]
    generate "rspec:install"

    say_custom "Configure simplecov"
    prepend_to_file "spec/spec_helper.rb" do
      <<~CODE
        require "simplecov"
        SimpleCov.start "rails" do
          add_group "Services", "app/services"
          add_group "Subscribers", "app/subscribers"
        end

      CODE
    end

    say_custom "Edit spec/rails_helper.rb"

    prepend_to_file "spec/rails_helper.rb", after: /Add additional requires below this line/ do
      <<~CODE
         require_relative "support/chrome"
      CODE
    end

    prepend_to_file "spec/rails_helper.rb", after: /RSpec.configure/ do
      <<~CODE
         # factory bot
         config.include FactoryBot::Syntax::Methods
  
         config.before(:suite) do
           FactoryBot.find_definitions
         end
  
         # treat service specs like model specs
         config.define_derived_metadata(file_path: Regexp.new("/spec/services/")) do |metadata|
           metadata[:type] = :model
         end
      CODE
    end

    say_custom "Add rspec support files"

    file 'spec/support/chrome.rb', <<-CODE
      RSpec.configure do |config|
        config.before(:each, type: :system) do |example|
          if example.metadata[:js]
            if ENV["SHOW_BROWSER"] == "true" # some
              driven_by :selenium_chrome do |option|
                # within docker chrome runs as root for now
                option.add_argument("no-sandbox")
                option.add_argument("disable-gpu")
              end
            else
              driven_by :selenium, using: :headless_chrome, screen_size: [1400, 1400] do |option|
                option.add_argument("no-sandbox")
                option.add_argument("disable-gpu")
              end
            end
          else
            # for none js rack is faster and enough
            driven_by(:rack_test)
          end
        end
      end
    CODE

    # setup factorybot boilerplate
    file "spec/factories.rb", <<~CODE
      FactoryBot.define do
      end
    CODE
  end

  # setup .env boilerplate
  file ".env", <<~CODE
    # DEFAULT connection settings, should be overridden within
    # env.<environment>.local
    # priority: last

    DEVELOPMENT_DATABASE_URL="mysql2://root:password@db/#{app_name}_dev?pool=5&encoding=utf8mb4"
    TEST_DATABASE_URL="mysql2://root:password@db/#{app_name}_test?pool=5&encoding=utf8mb4"
  CODE
  file ".env.local", "# private (don't checkin) settings for all envs\n# priority: 2nd"

  %w[development test].each do |env|
    file ".env.#{env}", "# shared settings for #{env}\n# priority: 3rd"
    file ".env.#{env}.local", "# private (don't checkin) settings for #{env}\n# priority: 1st"
  end

  bundle_command "exec standardrb --fix"
  bundle_command "exec standardrb --generate-todo"

  append_to_file '.gitignore', <<~CODE
    # dot env files
    .env.local
    .env.*.local

    #rspec metadata
    spec/examples.txt
    coverage

    .idea/
  CODE

  git :init
  git add: '.'
  git commit: "-a -m 'Initial commit'"
end