Make RuboCop RSpecRails work as a RuboCop plugin

This pull request adds support for RuboCop's plugin feature, added in
rubocop/rubocop#13792, released in v1.72.

It replaces the ad-hoc `inject_defaults!` with RuboCop plugins.

Some Rake tasks may still need to use `inject_defaults!`.

.rubocop.yml

@@ -1,10 +1,10 @@
 inherit_from: .rubocop_todo.yml
 
-require:
+plugins:
   - rubocop-performance
   - rubocop-rake
   - rubocop-rspec
-  - rubocop/cop/internal_affairs
+  - rubocop-internal_affairs
 
 AllCops:
   DisplayCopNames: true

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - Handle unknown HTTP status codes for `RSpecRails/HttpStatus` cop. ([@viralpraxis])
 - Fix a false negative for `RSpecRails/TravelAround` cop when passed as a proc to a travel method. ([@ydah])
+- Make RuboCop RSpecRails work as a RuboCop plugin. ([@bquorning])
 
 ## 2.30.0 (2024-06-12)
 

Gemfile

@@ -8,8 +8,8 @@ gem 'bump'
 gem 'rack'
 gem 'rake'
 gem 'rspec', '~> 3.11'
-gem 'rubocop-performance', '~> 1.7'
-gem 'rubocop-rake', '~> 0.6'
+gem 'rubocop-performance', '~> 1.24'
+gem 'rubocop-rake', '~> 0.7'
 gem 'simplecov', '>= 0.19'
 gem 'yard'
 

README.md

@@ -33,31 +33,34 @@ ways to do this:
 Put this into your `.rubocop.yml`.
 
 ```yaml
-require: rubocop-rspec_rails
+plugins: rubocop-rspec_rails
 ```
 
 Alternatively, use the following array notation when specifying multiple extensions.
 
 ```yaml
-require:
+plugins:
   - rubocop-rspec
   - rubocop-rspec_rails
 ```
 
 Now you can run `rubocop` and it will automatically load the RuboCop RSpec Rails
 cops together with the standard cops.
 
+> [!NOTE]
+> The plugin system is supported in RuboCop 1.72+. In earlier versions, use `require` instead of `plugins`.
+
 ### Command line
 
 ```bash
-rubocop --require rubocop-rspec_rails
+rubocop --plugin rubocop-rspec_rails
 ```
 
 ### Rake task
 
 ```ruby
 RuboCop::RakeTask.new do |task|
-  task.requires << 'rubocop-rspec_rails'
+  task.plugins << 'rubocop-rspec_rails'
 end
 ```
 

docs/modules/ROOT/pages/usage.adoc

@@ -8,33 +8,35 @@ There are three ways to do this:
 Put this into your `.rubocop.yml`:
 
 ----
-require: rubocop-rspec_rails
+plugins: rubocop-rspec_rails
 ----
 
 or, if you are using several extensions:
 
 ----
-require:
+plugins:
   - rubocop-rspec
   - rubocop-rspec_rails
 ----
 
 Now you can run `rubocop` and it will automatically load the RuboCop RSpec Rails
 cops together with the standard cops.
 
+NOTE: The plugin system is supported in RuboCop 1.72+. In earlier versions, use `require` instead of `plugins`.
+
 == Command line
 
 [source,bash]
 ----
-$ rubocop --require rubocop-rspec_rails
+$ rubocop --plugin rubocop-rspec_rails
 ----
 
 == Rake task
 
 [source,ruby]
 ----
 RuboCop::RakeTask.new do |task|
-  task.requires << 'rubocop-rspec_rails'
+  task.plugins << 'rubocop-rspec_rails'
 end
 ----
 

lib/rubocop-rspec_rails.rb

@@ -6,10 +6,8 @@
 require 'rubocop'
 require 'rubocop/rspec/language'
 
+require_relative 'rubocop/rspec_rails/plugin'
 require_relative 'rubocop/rspec_rails/version'
 
 require 'rubocop/cop/rspec/base'
 require_relative 'rubocop/cop/rspec_rails_cops'
-
-project_root = File.join(__dir__, '..')
-RuboCop::ConfigLoader.inject_defaults!(project_root)

lib/rubocop/rspec_rails/plugin.rb

@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require 'lint_roller'
+
+module RuboCop
+  module RSpecRails
+    # A plugin that integrates RuboCop RSpecRails with RuboCop's plugin system.
+    class Plugin < LintRoller::Plugin
+      # :nocov:
+      def about
+        LintRoller::About.new(
+          name: 'rubocop-rspec_rails',
+          version: Version::STRING,
+          homepage: 'https://github.com/rubocop/rubocop-rspec_rails',
+          description: 'Code style checking for RSpec Rails files.'
+        )
+      end
+      # :nocov:
+
+      def supported?(context)
+        context.engine == :rubocop
+      end
+
+      def rules(_context)
+        project_root = Pathname.new(__dir__).join('../../..')
+
+        LintRoller::Rules.new(
+          type: :path,
+          config_format: :rubocop,
+          value: project_root.join('config/default.yml')
+        )
+      end
+    end
+  end
+end

rubocop-rspec_rails.gemspec

@@ -31,9 +31,11 @@ Gem::Specification.new do |spec|
   spec.metadata = {
     'changelog_uri' => 'https://github.com/rubocop/rubocop-rspec_rails/blob/master/CHANGELOG.md',
     'documentation_uri' => 'https://docs.rubocop.org/rubocop-rspec_rails/',
-    'rubygems_mfa_required' => 'true'
+    'rubygems_mfa_required' => 'true',
+    'default_lint_roller_plugin' => 'RuboCop::RSpecRails::Plugin'
   }
 
-  spec.add_runtime_dependency 'rubocop', '~> 1.61'
-  spec.add_runtime_dependency 'rubocop-rspec', '~> 3', '>= 3.0.1'
+  spec.add_dependency 'lint_roller', '~> 1.1'
+  spec.add_dependency 'rubocop', '~> 1.72', '>= 1.72.1'
+  spec.add_runtime_dependency 'rubocop-rspec', '~> 3.5'
 end

spec/spec_helper.rb

@@ -42,8 +42,6 @@ module SpecHelper
   # We should take their advice!
   config.raise_on_warning = true
 
-  config.include(ExpectOffense)
-
   config.include_context 'with default RSpec/Language config', :config
   config.include_context 'smoke test', type: :cop_spec
 end

tasks/cops_documentation.rake

@@ -12,6 +12,8 @@ end
 
 desc 'Generate docs of all cops departments'
 task generate_cops_documentation: :yard_for_generate_documentation do
+  RuboCop::ConfigLoader.inject_defaults!("#{__dir__}/../config/default.yml")
+
   generator = CopsDocumentationGenerator.new(
     departments: %w[RSpecRails]
   )