Set up RuboCop with CI

Author: lewispb

.github/workflows/rubocop.yml

@@ -0,0 +1,24 @@
+name: RuboCop
+
+on: [push, pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      BUNDLE_ONLY: rubocop
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up Ruby 3.2
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.2
+        bundler-cache: true
+
+    - name: Run RuboCop
+      run: bundle exec rubocop --parallel

.gitignore

@@ -1,2 +1,3 @@
 *.gem
 .byebug_history
+.rubocop-*

.rubocop.yml

@@ -0,0 +1 @@
+inherit_from: https://raw.githubusercontent.com/rails/rails/main/.rubocop.yml

Gemfile

@@ -4,3 +4,9 @@ gemspec
 
 gem "rake"
 gem "byebug"
+gem "rubocop"
+gem "rubocop-minitest"
+gem "rubocop-packaging"
+gem "rubocop-performance"
+gem "rubocop-rails"
+gem "rubocop-md"

Gemfile.lock

@@ -68,6 +68,7 @@ GEM
       minitest (>= 5.1)
       tzinfo (~> 2.0)
       zeitwerk (~> 2.3)
+    ast (2.4.2)
     builder (3.2.4)
     byebug (11.1.3)
     concurrent-ruby (1.1.8)
@@ -78,6 +79,8 @@ GEM
       activesupport (>= 4.2.0)
     i18n (1.8.10)
       concurrent-ruby (~> 1.0)
+    json (2.6.3)
+    language_server-protocol (3.17.0.3)
     loofah (2.9.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
@@ -96,6 +99,10 @@ GEM
       racc (~> 1.4)
     nokogiri (1.15.2-x86_64-darwin)
       racc (~> 1.4)
+    parallel (1.23.0)
+    parser (3.2.2.3)
+      ast (~> 2.4.1)
+      racc
     racc (1.7.1)
     rack (2.2.3)
     rack-test (1.1.0)
@@ -126,11 +133,41 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (~> 1.0)
+    rainbow (3.1.1)
     rake (13.0.3)
     redis (5.0.6)
       redis-client (>= 0.9.0)
     redis-client (0.14.1)
       connection_pool
+    regexp_parser (2.8.1)
+    rexml (3.2.5)
+    rubocop (1.54.1)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
+      parallel (~> 1.10)
+      parser (>= 3.2.2.3)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.28.0, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
+    rubocop-md (1.2.0)
+      rubocop (>= 1.0)
+    rubocop-minitest (0.31.0)
+      rubocop (>= 1.39, < 2.0)
+    rubocop-packaging (0.5.2)
+      rubocop (>= 1.33, < 2.0)
+    rubocop-performance (1.18.0)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rails (2.20.2)
+      activesupport (>= 4.2.0)
+      rack (>= 1.1)
+      rubocop (>= 1.33.0, < 2.0)
+    ruby-progressbar (1.13.0)
     sprockets (4.0.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
@@ -141,6 +178,7 @@ GEM
     thor (1.1.0)
     tzinfo (2.0.4)
       concurrent-ruby (~> 1.0)
+    unicode-display_width (2.4.2)
     websocket-driver (0.7.3)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
@@ -156,6 +194,12 @@ DEPENDENCIES
   kredis!
   rails (>= 6.0.0)
   rake
+  rubocop
+  rubocop-md
+  rubocop-minitest
+  rubocop-packaging
+  rubocop-performance
+  rubocop-rails
 
 BUNDLED WITH
    2.3.12