Support Prism as a Ruby parser

Follow up rubocop/rubocop-ast#277

.github/workflows/main.yml

@@ -75,3 +75,19 @@ jobs:
           ruby-version: "3.3"
           bundler-cache: true
       - run: NO_COVERAGE=true bundle exec rake ${{ matrix.task }}
+
+  prism:
+    runs-on: ubuntu-latest
+    name: Prism
+    steps:
+      - uses: actions/checkout@v4
+      - name: set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          # Specify the minimum Ruby version 2.7 required for Prism to run.
+          ruby-version: 2.7
+          bundler-cache: true
+      - name: spec
+        env:
+          PARSER_ENGINE: parser_prism
+        run: NO_COVERAGE=true bundle exec rake prism_spec

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Master (Unreleased)
 
+- Support Prism as a Ruby parser (experimental). ([@ydah])
+
 ## 2.25.1 (2024-01-08)
 
 - Fix a false positive for `FactoryBot/CreateList` when create call does have method calls and repeat multiple times with other argument. ([@ydah])

Gemfile

@@ -6,6 +6,7 @@ gemspec
 
 gem 'bump'
 gem 'danger'
+gem 'prism'
 gem 'rack'
 gem 'rake'
 gem 'rspec', '~> 3.11'

Rakefile

@@ -77,6 +77,11 @@ task confirm_documentation: :generate_cops_documentation do
   end
 end
 
+desc 'Run RSpec with Prism'
+task :prism_spec do
+  sh('PARSER_ENGINE=parser_prism bundle exec rake spec')
+end
+
 task default: %i[build_config spec
                  internal_investigation
                  confirm_config

rubocop-factory_bot.gemspec

@@ -34,4 +34,5 @@ Gem::Specification.new do |spec|
   }
 
   spec.add_runtime_dependency 'rubocop', '~> 1.41'
+  spec.add_runtime_dependency 'rubocop-ast', '>= 1.31.1', '< 2.0'
 end

spec/rubocop/cop/factory_bot/consistent_parentheses_style_spec.rb

@@ -201,7 +201,10 @@
     end
 
     %w[&& ||].each do |operator|
-      context "with #{operator}" do
+      # FIXME: `undefined method `[]' for nil` occurs Prism 0.24.0. It has been
+      # resolved in the development line. This will be resolved in
+      # Prism > 0.24.0 and higher releases.
+      context "with #{operator}", broken_on: :prism do
         it 'does not flag the call' do
           expect_no_offenses(<<~RUBY)
             can_create_user? #{operator} create(:user)
@@ -210,7 +213,10 @@
       end
     end
 
-    context 'with ternary operator' do
+    # FIXME: `undefined method `[]' for nil` occurs Prism 0.24.0. It has been
+    # resolved in the development line. This will be resolved in
+    # Prism > 0.24.0 and higher releases.
+    context 'with ternary operator', broken_on: :prism do
       it 'does not flag the call' do
         expect_no_offenses(<<~RUBY)
           can_create_user? ? create(:user) : nil

spec/spec_helper.rb

@@ -31,6 +31,9 @@ module SpecHelper
 
   # Run focused tests with `fdescribe`, `fit`, `:focus` etc.
   config.filter_run_when_matching :focus
+  if ENV['PARSER_ENGINE'] == 'parser_prism'
+    config.filter_run_excluding broken_on: :prism
+  end
 
   # We should address configuration warnings when we upgrade
   config.raise_errors_for_deprecations!