Add binstubs

Moved dev/test dependencies into proper Bundler groups. I also added
binstubs for rspec and rubocop - this ensures we're running the right
versions of those tools locally.

.github/workflows/main.yml

@@ -33,10 +33,10 @@ jobs:
         run: bundle install
 
       - name: Lint with Rubocop
-        run: bundle exec rubocop
+        run: bin/rubocop
 
       - name: Run tests
-        run: bundle exec rspec
+        run: bin/rspec
 
       - name: Build gem
-        run: bundle exec rake build
+        run: bin/rake build

.github/workflows/release-gem.yml

@@ -26,7 +26,7 @@ jobs:
           touch $HOME/.gem/credentials
           chmod 0600 $HOME/.gem/credentials
           printf -- "---\n:rubygems_api_key: ${GEM_HOST_API_KEY}\n" > $HOME/.gem/credentials
-          bundle exec rake build
+          bin/rake build
           gem push pkg/*.gem
         env:
           GEM_HOST_API_KEY: "${{secrets.RUBYGEMS_AUTH_TOKEN}}"

.rubocop_todo.yml

@@ -12,6 +12,7 @@ Style/Documentation:
   Exclude:
     - 'spec/**/*'
     - 'test/**/*'
+    - 'app/controllers/letter_opener_web/application_controller.rb'
     - 'app/controllers/letter_opener_web/letters_controller.rb'
     - 'app/controllers/letter_opener_web/application_controller.rb'
     - 'app/models/letter_opener_web/letter.rb'

Gemfile

@@ -7,8 +7,15 @@ source 'http://rubygems.org'
 # development dependencies will be added by default to the :development group.
 gemspec
 
-gem 'rails', '~> 6.1'
-gem 'rspec-rails', '~> 5.0'
-gem 'rubocop', '~> 1.22'
-gem 'rubocop-rails', '~> 2.12'
-gem 'rubocop-rspec', '~> 2.5'
+group :development do
+  gem 'rails', '~> 6.1'
+  gem 'rspec-rails', '~> 5.0'
+  gem 'rubocop', '~> 1.22'
+  gem 'rubocop-rails', '~> 2.12'
+  gem 'rubocop-rspec', '~> 2.5'
+end
+
+group :development, :test do
+  gem 'pry-byebug'
+  gem 'pry-rails'
+end

bin/rake

@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'rake' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
+
+bundle_binstub = File.expand_path('bundle', __dir__)
+
+if File.file?(bundle_binstub)
+  if File.read(bundle_binstub, 300).include?('This file was generated by Bundler')
+    load(bundle_binstub)
+  else
+    abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
+Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this command again.")
+  end
+end
+
+require 'rubygems'
+require 'bundler/setup'
+
+load Gem.bin_path('rake', 'rake')

bin/rspec

@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'rspec' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
+
+bundle_binstub = File.expand_path('bundle', __dir__)
+
+if File.file?(bundle_binstub)
+  if File.read(bundle_binstub, 300).include?('This file was generated by Bundler')
+    load(bundle_binstub)
+  else
+    abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
+Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this command again.")
+  end
+end
+
+require 'rubygems'
+require 'bundler/setup'
+
+load Gem.bin_path('rspec-core', 'rspec')

bin/rubocop

@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'rubocop' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
+
+bundle_binstub = File.expand_path('bundle', __dir__)
+
+if File.file?(bundle_binstub)
+  if File.read(bundle_binstub, 300).include?('This file was generated by Bundler')
+    load(bundle_binstub)
+  else
+    abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.
+Replace `bin/bundle` by running `bundle binstubs bundler --force`, then run this command again.")
+  end
+end
+
+require 'rubygems'
+require 'bundler/setup'
+
+load Gem.bin_path('rubocop', 'rubocop')