Readd current version of rubocop

.rubocop.yml

@@ -0,0 +1,49 @@
+require:
+  - rubocop-performance
+  - rubocop-rails
+
+# Stolen from https://gist.github.com/jhass/a5ae80d87f18e53e7b56
+AllCops:
+  Exclude:
+    - "bin/**/*"
+    - "db/schema.rb"
+
+# Enable Rails
+Rails:
+  Enabled: true
+
+# Commonly used screens these days easily fit more than 80 characters.
+Metrics/LineLength:
+  Max: 120
+
+# Too short methods lead to extraction of single-use methods, which can make
+# the code easier to read (by naming things), but can also clutter the class
+Metrics/MethodLength:
+  Exclude:
+    - "db/migrate/*"
+  Max: 50
+
+# The guiding principle of classes is SRP, SRP can't be accurately measured by LoC
+Metrics/ClassLength:
+  Max: 1500
+Metrics/ModuleLength:
+  Max: 1500
+
+# Raise AbcSize from 15 to 20
+Metrics/AbcSize:
+  Exclude:
+    - "db/migrate/*"
+  Max: 50
+
+Metrics/BlockLength:
+  ExcludedMethods:
+    - "namespace"
+    - "create_table"
+  Exclude:
+    - "config/**/*.rb"
+    - "spec/**/*.rb"
+
+# Disable documentation checks for now
+# should be done with yard instead
+Style/Documentation:
+  Enabled: false

Gemfile

@@ -56,6 +56,9 @@ group :development do
   gem 'listen', '>= 3.0.5', '< 3.2'
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
   gem 'railroady'
+  gem 'rubocop'
+  gem 'rubocop-performance'
+  gem 'rubocop-rails'
   gem 'solargraph'
   gem 'spring'
   gem 'spring-watcher-listen', '~> 2.0.0'

Gemfile.lock

@@ -231,6 +231,13 @@ GEM
       unicode-display_width (>= 1.4.0, < 3.0)
     rubocop-ast (1.10.0)
       parser (>= 3.0.1.1)
+    rubocop-performance (1.11.4)
+      rubocop (>= 1.7.0, < 2.0)
+      rubocop-ast (>= 0.4.0)
+    rubocop-rails (2.11.3)
+      activesupport (>= 4.2.0)
+      rack (>= 1.1)
+      rubocop (>= 1.7.0, < 2.0)
     ruby-progressbar (1.11.0)
     ruby_dep (1.5.0)
     shoulda-matchers (5.0.0)
@@ -311,6 +318,9 @@ DEPENDENCIES
   railroady
   rails (~> 6.0.3)
   rspec-rails
+  rubocop
+  rubocop-performance
+  rubocop-rails
   shoulda-matchers
   solargraph
   spring