[ruby] Introduce Rubocop for Static Code Analysis

.github/workflows/e-navigator.yml

@@ -89,3 +89,6 @@ jobs:
       - name: Run Brakeman
         working-directory: ./ruby-on-rails/e-navigator
         run: bundle exec brakeman --no-pager
+      - name: Run RuboCop
+        working-directory: ./ruby-on-rails/e-navigator
+        run: bundle exec rubocop

.github/workflows/perfect-ruby-on-rails.yml

@@ -104,3 +104,6 @@ jobs:
       - name: Run Brakeman
         working-directory: ./ruby-on-rails/perfect-ruby-on-rails
         run: bundle exec brakeman --no-pager
+      - name: Run RuboCop
+        working-directory: ./ruby-on-rails/perfect-ruby-on-rails
+        run: bundle exec rubocop

.github/workflows/restful-api.yml

@@ -78,3 +78,6 @@ jobs:
       - name: Run Brakeman
         working-directory: ./ruby-on-rails/restful-api
         run: bundle exec brakeman --no-pager
+      - name: Run RuboCop
+        working-directory: ./ruby-on-rails/restful-api
+        run: bundle exec rubocop

ruby-on-rails/e-navigator/.rubocop.yml

@@ -0,0 +1,15 @@
+# Reference: https://github.com/rubocop/ruby-style-guide
+
+require:
+  - rubocop-minitest
+  - rubocop-performance
+  - rubocop-rails
+
+AllCops:
+  TargetRubyVersion: 4.0
+  NewCops: enable
+  Exclude:
+    - 'bin/**/*'
+    - 'db/schema.rb'
+    - 'vendor/**/*'
+    - 'node_modules/**/*'

ruby-on-rails/e-navigator/Gemfile

@@ -37,6 +37,11 @@ group :development do
   gem 'web-console', '~> 4.3.0'
   # Static code analysis for security vulnerabilities
   gem 'brakeman', '~> 8.0.4', require: false
+  # RuboCop
+  gem 'rubocop', require: false
+  gem 'rubocop-minitest', require: false
+  gem 'rubocop-performance', require: false
+  gem 'rubocop-rails', require: false
 
   # Provides methods for benchmarking Ruby code, giving detailed reports on the time taken for each task
   gem 'benchmark', '~> 0.5.0'

ruby-on-rails/perfect-ruby-on-rails/.rubocop.yml

@@ -0,0 +1,15 @@
+# Reference: https://github.com/rubocop/ruby-style-guide
+
+require:
+  - rubocop-minitest
+  - rubocop-performance
+  - rubocop-rails
+
+AllCops:
+  TargetRubyVersion: 4.0
+  NewCops: enable
+  Exclude:
+    - 'bin/**/*'
+    - 'db/schema.rb'
+    - 'vendor/**/*'
+    - 'node_modules/**/*'

ruby-on-rails/perfect-ruby-on-rails/Gemfile

@@ -82,6 +82,11 @@ group :development do
   gem 'web-console', '~> 4.3.0'
   # Static code analysis for security vulnerabilities
   gem 'brakeman', '~> 8.0.4', require: false
+  # RuboCop
+  gem 'rubocop', require: false
+  gem 'rubocop-minitest', require: false
+  gem 'rubocop-performance', require: false
+  gem 'rubocop-rails', require: false
 
   # Provides methods for benchmarking Ruby code, giving detailed reports on the time taken for each task
   gem 'benchmark', '~> 0.5.0'

ruby-on-rails/restful-api/.rubocop.yml

@@ -0,0 +1,15 @@
+# Reference: https://github.com/rubocop/ruby-style-guide
+
+require:
+  - rubocop-performance
+  - rubocop-rails
+  - rubocop-rspec
+
+AllCops:
+  TargetRubyVersion: 4.0
+  NewCops: enable
+  Exclude:
+    - 'bin/**/*'
+    - 'db/schema.rb'
+    - 'vendor/**/*'
+    - 'node_modules/**/*'

ruby-on-rails/restful-api/Gemfile

@@ -57,6 +57,11 @@ end
 
 group :development do
   gem 'brakeman', '~> 8.0.4', require: false
+  # RuboCop
+  gem 'rubocop', require: false
+  gem 'rubocop-performance', require: false
+  gem 'rubocop-rails', require: false
+  gem 'rubocop-rspec', require: false
 end
 
 group :test do