ci: add ruby style check

Author: nguyenhuuit

.github/workflows/ruby-style.yml

@@ -0,0 +1,29 @@
+name: Ruby Style Check
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+     - '**/*.rb'
+
+jobs:
+  style:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.4'
+          bundler-cache: true
+      
+      - name: Install RuboCop and extensions
+        run: |
+          gem install rubocop
+          gem install rubocop-rake
+          gem install rubocop-rspec
+      
+      - name: Run RuboCop
+        continue-on-error: true
+        run: rubocop 

.rubocop.yml

@@ -0,0 +1,20 @@
+require:
+  - rubocop-rake
+  - rubocop-rspec
+
+AllCops:
+  NewCops: enable
+  TargetRubyVersion: 3.4
+
+Style/Documentation:
+  Enabled: false
+
+Layout/LineLength:
+  Max: 120
+
+Style/StringLiterals:
+  EnforcedStyle: single_quotes
+
+Style/FrozenStringLiteralComment:
+  Enabled: true
+  EnforcedStyle: always 

2024/day1/part1.rb

@@ -18,7 +18,7 @@ def imperative_style(input)
   rights = []
 
   for line in lines
-    left, right = line.split("   ")
+    left, right = line.split('   ')
     lefts << left.to_i
     rights << right.to_i
   end

2024/day1/part2.rb

@@ -15,7 +15,7 @@ def imperative_style(input)
   rights = Hash.new(0)
 
   for line in lines
-    left, right = line.split("   ")
+    left, right = line.split('   ')
     lefts << left
     rights[right] += 1
   end