rails-generators

<quick_start> <basic_generator> Create a simple service object generator:

# lib/generators/service/service_generator.rb
module Generators
  class ServiceGenerator < Rails::Generators::NamedBase
    source_root File.expand_path('templates', __dir__)

    def create_service_file
      template 'service.rb.tt', "app/services/#{file_name}_service.rb"
    end