Add FrozenStringLiteral = true

.rubocop.yml

@@ -1,6 +1,6 @@
 require: rubocop-rails
 Style/FrozenStringLiteralComment:
-  Enabled: false
+  Enabled: true
 Style/Documentation:
   Enabled: false
 Style/StringLiterals:

Gemfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 source "https://rubygems.org"
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 

Rakefile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 

app/channels/application_cable/channel.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ApplicationCable
   class Channel < ActionCable::Channel::Base
   end

app/channels/application_cable/connection.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ApplicationCable
   class Connection < ActionCable::Connection::Base
   end

app/chewy/articles_index.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # @articles = ArticlesIndex.query(
 #   query_string: {
 #     query: 'Article',

app/controllers/application_controller.rb

@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 class ApplicationController < ActionController::Base
 end

app/controllers/demo_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class DemoController < ApplicationController
   def index
     # Example of ElasticSearch/Chewy search

app/helpers/application_helper.rb

@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 module ApplicationHelper
 end

app/helpers/articles_helper.rb

@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 module ArticlesHelper
 end

app/jobs/application_job.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationJob < ActiveJob::Base
   # Automatically retry jobs that encountered a deadlock
   # retry_on ActiveRecord::Deadlocked

app/jobs/example_job.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ExampleJob < ApplicationJob
   queue_as :default
 

app/mailers/application_mailer.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationMailer < ActionMailer::Base
   default from: "from@example.com"
   layout "mailer"

app/mailers/demo_mailer.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # rails generate mailer demo
 #
 # DemoMailer.welcome_email.deliver!

app/models/application_record.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationRecord < ActiveRecord::Base
   primary_abstract_class
 end

app/models/article.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # rails g model Article
 #  title:string
 #  content_raw:text

app/models/currency_rate.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # rails g model currency_rate
 #   from:string
 #   to:string
@@ -8,7 +10,7 @@
 # rails runner "CurrencyRate.get('USD', 'EUR')"
 
 class CurrencyRate < ApplicationRecord
-  API = 'https://api.exchangerate.host/latest'.freeze
+  API = 'https://api.exchangerate.host/latest'
 
   def self.get(from = 'USD', to = 'EUR')
     uri = URI(CurrencyRate::API + "?base=#{from}&symbols=#{to}")

bin/helpers/chewy.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 def chewy_index
   puts 'Indexing with CHEWY'
   container_exec('rails', 'rake chewy:update')

bin/helpers/common.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 def prompt!(message = 'Are you sure to continue? [y/Y]')
   puts message
   prompt = $stdin.gets.chomp

bin/helpers/cron.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 def cron_start
   container_exec('--user root rails', '/etc/init.d/cron start')
 end

bin/helpers/docker.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 def check_docker!
   return if system('docker -v')
 

bin/helpers/helpers.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative './common'
 require_relative './docker'
 require_relative './chewy'
@@ -9,7 +11,7 @@
 require_relative './rubocop'
 
 DELAY = 3
-ENV_NAME = ENV.fetch('RAILS_ENV') { 'development' }
+ENV_NAME = ENV.fetch('RAILS_ENV', 'development')
 
 $steps_counter = 1
 $steps_messages = []

bin/helpers/puma.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 def puma_start
   puts 'Launching PUMA'
   container_bash_exec('rails', @puma_start_command, detached = true)

bin/helpers/rails.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 def rails_install_gems
   puts 'Install Gems'
   container_bash_exec('rails', 'bundle install')

bin/helpers/rubocop.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 def rubocop
   container_bash_exec('rails', 'rubocop --require rubocop-rails')
 end

bin/helpers/sidekiq.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 def sidekiq_start
   puts 'Launching SIDEKIQ'
   container_bash_exec('rails', 'bundle exec sidekiq -C config/_SIDEKIQ.yml', detached = true)

bin/helpers/whenever.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 def whenever_start
   container_exec('rails', 'bundle exec whenever --update-crontab --load-file config/_SCHEDULE.rb -i lucky')
 end

config.ru

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file is used by Rack-based servers to start the application.
 
 require_relative 'config/environment'

config/_PUMA.rb

@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 workers 1
 threads 2, 4
 
-env_name = ENV.fetch('RAILS_ENV') { 'development' }
+env_name = ENV.fetch('RAILS_ENV', 'development')
 environment env_name
 
 if env_name == 'development'

config/_SCHEDULE.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Learn more: http://github.com/javan/whenever
 #
 # How to initialize whenever
@@ -13,7 +15,7 @@
 # crontab -l
 
 env :GEM_HOME, ENV['GEM_HOME']
-set :environment, ENV.fetch('RAILS_ENV') { 'development' }
+set :environment, ENV.fetch('RAILS_ENV', 'development')
 
 set :output, {
   standard: '/home/lucky/app/log/cron.log',

config/application.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative "boot"
 
 require "rails/all"

config/boot.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
 
 require "bundler/setup" # Set up gems listed in the Gemfile.

config/environment.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Load the Rails application.
 require_relative 'application'
 

config/environments/development.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_support/core_ext/integer/time"
 
 Rails.application.configure do

config/environments/production.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_support/core_ext/integer/time"
 
 Rails.application.configure do

config/environments/test.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "active_support/core_ext/integer/time"
 
 # The test environment is used exclusively to run your application's

config/importmap.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Pin npm packages by running ./bin/importmap
 
 pin "application", preload: true

config/initializers/_CHEWY.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 elastic_host = Settings.elastic.host
 elastic_port = Settings.elastic.port
 

config/initializers/_CONFIG.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 app = Rails.application
 
 settings_file = "#{app.config.root}/config/_CONFIG.yml"

config/initializers/_REDIS.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 redis_port = Settings.redis.port
 redis_host = Settings.redis.host
 

config/initializers/_SIDEKIQ.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # bundle exec sidekiq -C config/sidekiq.yml
 
 redis_port = Settings.redis.port

config/initializers/assets.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.

config/initializers/config.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Config.setup do |config|
   # Name of the constant exposing loaded settings
   config.const_name = 'Settings'

config/initializers/content_security_policy.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Define an application-wide content security policy.

config/initializers/filter_parameter_logging.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Configure parameters to be filtered from the log file. Use this to limit dissemination of

config/initializers/inflections.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Add new inflection rules using the following format. Inflections

config/initializers/permissions_policy.rb

@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Define an application-wide HTTP permissions policy. For further
 # information see https://developers.google.com/web/updates/2018/06/feature-policy
 #

config/routes.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.routes.draw do
   # Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html
 

db/migrate/20230106141412_create_articles.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateArticles < ActiveRecord::Migration[7.0]
   def change
     create_table :articles do |t|

db/migrate/20230121113818_create_currency_rates.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateCurrencyRates < ActiveRecord::Migration[7.0]
   def change
     create_table :currency_rates do |t|

db/seeds.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file should contain all the record creation needed to seed the database with its default values.
 # The data can then be loaded with the bin/rails db:seed command (or created alongside the database with db:setup).
 #

test/application_system_test_case.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 class ApplicationSystemTestCase < ActionDispatch::SystemTestCase

test/channels/application_cable/connection_test.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 module ApplicationCable

test/controllers/demo_controller_test.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 class DemoControllerTest < ActionDispatch::IntegrationTest

test/jobs/example_job_test.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 class ExampleJobTest < ActiveJob::TestCase

test/mailers/demo_mailer_test.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 class DemoMailerTest < ActionMailer::TestCase

test/mailers/previews/demo_mailer_preview.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Preview all emails at http://localhost:3000/rails/mailers/demo_mailer
 class DemoMailerPreview < ActionMailer::Preview
   # Accessible from  http://localhost:3000/rails/mailers/demo_mailer/welcome_email

test/models/article_test.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 class ArticleTest < ActiveSupport::TestCase

test/models/currency_rate_test.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 class CurrencyRateTest < ActiveSupport::TestCase

test/test_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 ENV["RAILS_ENV"] ||= "test"
 require_relative "../config/environment"
 require "rails/test_help"