Add Rubocop configuration

Author: bastelfreak

.github/workflows/ruby-rspec.yml

@@ -9,6 +9,18 @@ on:
       - main
 
 jobs:
+  rubocop:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Ruby ${{ matrix.ruby }}
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler-cache: true
+      - name: Run Rubocop
+        run: bundle exec rake rubocop
+
   test:
     name: Test with Ruby ${{ matrix.ruby_version }}
     runs-on: ubuntu-latest
@@ -25,6 +37,5 @@ jobs:
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
-
       - name: Build and test with Rspec
         run: bundle exec rspec

.gitignore

@@ -21,3 +21,4 @@ _yardoc
 *.a
 mkmf.log
 /vendor/
+/.vendor/

.rubocop.yml

@@ -0,0 +1,8 @@
+---
+inherit_from: .rubocop_todo.yml
+
+inherit_gem:
+  voxpupuli-rubocop: rubocop.yml
+
+AllCops:
+  TargetRubyVersion: '3.1'